./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/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_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/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_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/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 a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 --- 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 21:03:53,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:03:53,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:03:53,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:03:53,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:03:53,591 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:03:53,593 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:03:53,598 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:03:53,600 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:03:53,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:03:53,606 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:03:53,608 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:03:53,609 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:03:53,611 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:03:53,613 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:03:53,615 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:03:53,616 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:03:53,617 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:03:53,618 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:03:53,625 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:03:53,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:03:53,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:03:53,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:03:53,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:03:53,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:03:53,641 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:03:53,641 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:03:53,643 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:03:53,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:03:53,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:03:53,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:03:53,646 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:03:53,648 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:03:53,650 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:03:53,651 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:03:53,651 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:03:53,652 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:03:53,652 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:03:53,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:03:53,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:03:53,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:03:53,655 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-02 21:03:53,699 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:03:53,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:03:53,700 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:03:53,700 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:03:53,701 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:03:53,701 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:03:53,702 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:03:53,703 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:03:53,703 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:03:53,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:03:53,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:03:53,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:03:53,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:03:53,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:03:53,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:03:53,706 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:03:53,706 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:03:53,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:03:53,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:03:53,707 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:03:53,707 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:03:53,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:03:53,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:03:53,708 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:03:53,708 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:03:53,708 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:03:53,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:03:53,710 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:03:53,710 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:03:53,710 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:03:53,711 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_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 [2022-11-02 21:03:54,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:03:54,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:03:54,033 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:03:54,034 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:03:54,038 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:03:54,040 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2022-11-02 21:03:54,125 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/data/a6bc27b12/45bf974eb8df419ea1cff7b122fd97d0/FLAG670e2389b [2022-11-02 21:03:54,893 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:03:54,896 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2022-11-02 21:03:54,938 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/data/a6bc27b12/45bf974eb8df419ea1cff7b122fd97d0/FLAG670e2389b [2022-11-02 21:03:54,976 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/data/a6bc27b12/45bf974eb8df419ea1cff7b122fd97d0 [2022-11-02 21:03:54,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:03:54,982 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:03:54,985 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:03:54,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:03:54,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:03:54,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:03:54" (1/1) ... [2022-11-02 21:03:54,991 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65a773e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:03:54, skipping insertion in model container [2022-11-02 21:03:54,992 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:03:54" (1/1) ... [2022-11-02 21:03:54,999 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:03:55,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:03:55,359 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_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2022-11-02 21:03:55,365 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_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2022-11-02 21:03:56,178 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:56,179 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:56,180 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:56,181 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:56,182 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:56,197 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:56,198 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:56,200 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:56,201 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:56,203 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:56,205 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:56,205 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:56,206 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:56,527 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-02 21:03:56,528 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-02 21:03:56,529 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-02 21:03:56,531 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-02 21:03:56,532 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-02 21:03:56,533 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-02 21:03:56,534 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-02 21:03:56,534 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-02 21:03:56,535 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-02 21:03:56,536 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-02 21:03:56,682 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-02 21:03:56,707 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:03:56,731 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:03:56,776 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_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2022-11-02 21:03:56,777 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_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2022-11-02 21:03:56,851 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:56,852 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:56,853 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:56,853 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:56,854 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:56,863 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:56,864 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:56,865 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:56,866 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:56,867 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:56,868 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:56,869 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:56,870 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:03:56,914 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-02 21:03:56,916 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-02 21:03:56,917 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-02 21:03:56,918 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-02 21:03:56,919 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-02 21:03:56,920 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-02 21:03:56,921 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-02 21:03:56,921 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-02 21:03:56,922 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-02 21:03:56,923 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-02 21:03:56,953 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-02 21:03:56,972 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:03:57,250 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:03:57,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:03:57 WrapperNode [2022-11-02 21:03:57,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:03:57,251 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:03:57,260 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:03:57,260 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:03:57,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:03:57" (1/1) ... [2022-11-02 21:03:57,346 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:03:57" (1/1) ... [2022-11-02 21:03:57,397 INFO L138 Inliner]: procedures = 679, calls = 1040, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 136 [2022-11-02 21:03:57,401 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:03:57,402 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:03:57,403 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:03:57,403 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:03:57,416 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:03:57" (1/1) ... [2022-11-02 21:03:57,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:03:57" (1/1) ... [2022-11-02 21:03:57,433 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:03:57" (1/1) ... [2022-11-02 21:03:57,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:03:57" (1/1) ... [2022-11-02 21:03:57,461 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:03:57" (1/1) ... [2022-11-02 21:03:57,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:03:57" (1/1) ... [2022-11-02 21:03:57,478 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:03:57" (1/1) ... [2022-11-02 21:03:57,480 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:03:57" (1/1) ... [2022-11-02 21:03:57,484 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:03:57,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:03:57,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:03:57,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:03:57,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:03:57" (1/1) ... [2022-11-02 21:03:57,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:03:57,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:03:57,532 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:03:57,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:03:57,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 21:03:57,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-02 21:03:57,593 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-02 21:03:57,593 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-02 21:03:57,594 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-02 21:03:57,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 21:03:57,595 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-02 21:03:57,596 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-02 21:03:57,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:03:57,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-02 21:03:57,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:03:57,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:03:57,599 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-02 21:03:57,599 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-02 21:03:57,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 21:03:57,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 21:03:57,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-02 21:03:57,600 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-02 21:03:57,600 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-02 21:03:57,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 21:03:57,970 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:03:57,972 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:03:58,240 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:03:58,248 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:03:58,248 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 21:03:58,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:03:58 BoogieIcfgContainer [2022-11-02 21:03:58,251 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:03:58,253 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:03:58,253 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:03:58,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:03:58,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:03:54" (1/3) ... [2022-11-02 21:03:58,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b84185f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:03:58, skipping insertion in model container [2022-11-02 21:03:58,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:03:57" (2/3) ... [2022-11-02 21:03:58,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b84185f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:03:58, skipping insertion in model container [2022-11-02 21:03:58,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:03:58" (3/3) ... [2022-11-02 21:03:58,260 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_end_harness.i [2022-11-02 21:03:58,280 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:03:58,280 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 21:03:58,385 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:03:58,392 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;@5f604f1c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:03:58,392 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 21:03:58,397 INFO L276 IsEmpty]: Start isEmpty. Operand has 68 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 49 states have internal predecessors, (65), 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 21:03:58,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-02 21:03:58,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:58,409 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 21:03:58,410 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:58,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:58,415 INFO L85 PathProgramCache]: Analyzing trace with hash -2107862704, now seen corresponding path program 1 times [2022-11-02 21:03:58,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:03:58,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745537584] [2022-11-02 21:03:58,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:58,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:03:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:58,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:03:58,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:58,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:03:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:58,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 21:03:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:58,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-02 21:03:58,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:59,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-02 21:03:59,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:59,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-02 21:03:59,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:59,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-02 21:03:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:59,121 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 21:03:59,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:03:59,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745537584] [2022-11-02 21:03:59,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745537584] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:59,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:03:59,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 21:03:59,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141823513] [2022-11-02 21:03:59,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:59,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 21:03:59,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:03:59,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 21:03:59,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 21:03:59,183 INFO L87 Difference]: Start difference. First operand has 68 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 49 states have internal predecessors, (65), 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 21:03:59,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:59,230 INFO L93 Difference]: Finished difference Result 128 states and 184 transitions. [2022-11-02 21:03:59,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 21:03:59,232 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 21:03:59,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:59,246 INFO L225 Difference]: With dead ends: 128 [2022-11-02 21:03:59,247 INFO L226 Difference]: Without dead ends: 63 [2022-11-02 21:03:59,250 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 21:03:59,252 INFO L413 NwaCegarLoop]: 87 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, 87 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 21:03:59,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:03:59,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-02 21:03:59,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-02 21:03:59,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 45 states have internal predecessors, (57), 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 21:03:59,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2022-11-02 21:03:59,299 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 68 [2022-11-02 21:03:59,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:59,300 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2022-11-02 21:03:59,300 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 21:03:59,300 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2022-11-02 21:03:59,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-02 21:03:59,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:59,303 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 21:03:59,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 21:03:59,304 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:59,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:59,305 INFO L85 PathProgramCache]: Analyzing trace with hash 900796622, now seen corresponding path program 1 times [2022-11-02 21:03:59,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:03:59,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552020365] [2022-11-02 21:03:59,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:59,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:03:59,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:59,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:03:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:59,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:03:59,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:59,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 21:03:59,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:59,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-02 21:03:59,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:59,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-02 21:03:59,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:59,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-02 21:03:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:59,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-02 21:03:59,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:59,999 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 21:03:59,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:00,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552020365] [2022-11-02 21:04:00,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552020365] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:04:00,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824466368] [2022-11-02 21:04:00,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:00,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:04:00,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:04:00,006 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:04:00,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 21:04:00,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:00,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-02 21:04:00,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:00,413 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 21:04:00,432 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 21:04:00,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:04:00,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:04:00,544 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 21:04:00,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:04:00,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:04:00,558 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 21:04:01,224 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 21:04:01,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:04:01,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824466368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:01,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:04:01,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2022-11-02 21:04:01,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385335807] [2022-11-02 21:04:01,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:01,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:04:01,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:01,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:04:01,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-02 21:04:01,230 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 21:04:01,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:01,442 INFO L93 Difference]: Finished difference Result 144 states and 195 transitions. [2022-11-02 21:04:01,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:04:01,443 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 68 [2022-11-02 21:04:01,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:01,450 INFO L225 Difference]: With dead ends: 144 [2022-11-02 21:04:01,450 INFO L226 Difference]: Without dead ends: 93 [2022-11-02 21:04:01,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-02 21:04:01,460 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 32 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:01,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 276 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-11-02 21:04:01,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-02 21:04:01,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 79. [2022-11-02 21:04:01,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 60 states have internal predecessors, (77), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-11-02 21:04:01,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 105 transitions. [2022-11-02 21:04:01,491 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 105 transitions. Word has length 68 [2022-11-02 21:04:01,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:01,491 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 105 transitions. [2022-11-02 21:04:01,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 21:04:01,492 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 105 transitions. [2022-11-02 21:04:01,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-02 21:04:01,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:01,499 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 21:04:01,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:01,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:04:01,700 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:01,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:01,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1148591220, now seen corresponding path program 1 times [2022-11-02 21:04:01,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:01,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497856747] [2022-11-02 21:04:01,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:01,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:01,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:01,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:04:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:01,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:04:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:01,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 21:04:01,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:01,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-02 21:04:01,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:02,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-02 21:04:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:02,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-02 21:04:02,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:02,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-02 21:04:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:02,116 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 21:04:02,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:02,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497856747] [2022-11-02 21:04:02,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497856747] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:04:02,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558968494] [2022-11-02 21:04:02,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:02,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:04:02,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:04:02,122 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:04:02,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 21:04:02,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:02,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-02 21:04:02,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:02,393 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 21:04:02,393 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 21:04:02,412 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 21:04:02,412 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 21:04:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 21:04:03,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:04:04,341 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 21:04:04,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558968494] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:04:04,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:04:04,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 12] total 28 [2022-11-02 21:04:04,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195814669] [2022-11-02 21:04:04,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:04:04,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 21:04:04,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:04,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 21:04:04,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2022-11-02 21:04:04,348 INFO L87 Difference]: Start difference. First operand 79 states and 105 transitions. Second operand has 28 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 25 states have internal predecessors, (94), 9 states have call successors, (19), 3 states have call predecessors, (19), 7 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2022-11-02 21:04:06,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:06,915 INFO L93 Difference]: Finished difference Result 246 states and 404 transitions. [2022-11-02 21:04:06,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-02 21:04:06,916 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 25 states have internal predecessors, (94), 9 states have call successors, (19), 3 states have call predecessors, (19), 7 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) Word has length 68 [2022-11-02 21:04:06,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:06,920 INFO L225 Difference]: With dead ends: 246 [2022-11-02 21:04:06,920 INFO L226 Difference]: Without dead ends: 192 [2022-11-02 21:04:06,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 127 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=439, Invalid=3221, Unknown=0, NotChecked=0, Total=3660 [2022-11-02 21:04:06,923 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 255 mSDsluCounter, 1431 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 1560 SdHoareTripleChecker+Invalid, 1622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 373 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:06,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 1560 Invalid, 1622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1087 Invalid, 0 Unknown, 373 Unchecked, 1.2s Time] [2022-11-02 21:04:06,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-02 21:04:06,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 139. [2022-11-02 21:04:06,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 104 states have (on average 1.375) internal successors, (143), 110 states have internal predecessors, (143), 22 states have call successors, (22), 8 states have call predecessors, (22), 12 states have return successors, (43), 20 states have call predecessors, (43), 21 states have call successors, (43) [2022-11-02 21:04:06,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 208 transitions. [2022-11-02 21:04:06,985 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 208 transitions. Word has length 68 [2022-11-02 21:04:06,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:06,986 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 208 transitions. [2022-11-02 21:04:06,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 25 states have internal predecessors, (94), 9 states have call successors, (19), 3 states have call predecessors, (19), 7 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2022-11-02 21:04:06,988 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 208 transitions. [2022-11-02 21:04:06,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-02 21:04:06,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:06,996 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 21:04:07,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:07,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-02 21:04:07,215 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:07,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:07,215 INFO L85 PathProgramCache]: Analyzing trace with hash 577933322, now seen corresponding path program 1 times [2022-11-02 21:04:07,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:07,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284797527] [2022-11-02 21:04:07,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:07,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:07,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:07,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:04:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:07,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:04:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:07,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 21:04:07,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:07,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-02 21:04:07,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:07,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-02 21:04:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:07,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-02 21:04:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:07,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-02 21:04:07,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:07,576 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 21:04:07,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:07,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284797527] [2022-11-02 21:04:07,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284797527] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:04:07,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157428128] [2022-11-02 21:04:07,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:07,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:04:07,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:04:07,579 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:04:07,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 21:04:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:07,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:04:07,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:07,857 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 21:04:07,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:04:07,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157428128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:07,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:04:07,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2022-11-02 21:04:07,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990728198] [2022-11-02 21:04:07,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:07,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:04:07,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:07,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:04:07,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:04:07,862 INFO L87 Difference]: Start difference. First operand 139 states and 208 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 21:04:08,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:08,086 INFO L93 Difference]: Finished difference Result 259 states and 395 transitions. [2022-11-02 21:04:08,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:04:08,087 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 21:04:08,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:08,093 INFO L225 Difference]: With dead ends: 259 [2022-11-02 21:04:08,093 INFO L226 Difference]: Without dead ends: 150 [2022-11-02 21:04:08,094 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 21:04:08,100 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 105 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:08,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 239 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:04:08,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-02 21:04:08,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 145. [2022-11-02 21:04:08,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 108 states have (on average 1.3611111111111112) internal successors, (147), 116 states have internal predecessors, (147), 22 states have call successors, (22), 8 states have call predecessors, (22), 14 states have return successors, (49), 20 states have call predecessors, (49), 21 states have call successors, (49) [2022-11-02 21:04:08,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 218 transitions. [2022-11-02 21:04:08,150 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 218 transitions. Word has length 70 [2022-11-02 21:04:08,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:08,151 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 218 transitions. [2022-11-02 21:04:08,151 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 21:04:08,151 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 218 transitions. [2022-11-02 21:04:08,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-02 21:04:08,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:08,157 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 21:04:08,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:08,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:04:08,383 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:08,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:08,383 INFO L85 PathProgramCache]: Analyzing trace with hash -34807881, now seen corresponding path program 1 times [2022-11-02 21:04:08,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:08,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158386281] [2022-11-02 21:04:08,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:08,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:08,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:04:08,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:08,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:04:08,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:08,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 21:04:08,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:08,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-02 21:04:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:08,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-02 21:04:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:08,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-02 21:04:08,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:08,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-02 21:04:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:08,752 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 21:04:08,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:08,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158386281] [2022-11-02 21:04:08,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158386281] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:04:08,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67757451] [2022-11-02 21:04:08,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:08,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:04:08,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:04:08,754 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:04:08,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 21:04:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:08,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 21:04:08,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:09,054 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 21:04:09,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:04:09,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67757451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:09,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:04:09,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2022-11-02 21:04:09,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219953399] [2022-11-02 21:04:09,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:09,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:04:09,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:09,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:04:09,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-02 21:04:09,058 INFO L87 Difference]: Start difference. First operand 145 states and 218 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 21:04:09,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:09,420 INFO L93 Difference]: Finished difference Result 299 states and 464 transitions. [2022-11-02 21:04:09,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:04:09,421 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 21:04:09,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:09,425 INFO L225 Difference]: With dead ends: 299 [2022-11-02 21:04:09,425 INFO L226 Difference]: Without dead ends: 184 [2022-11-02 21:04:09,427 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 21:04:09,428 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 142 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:09,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 279 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:04:09,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-02 21:04:09,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 149. [2022-11-02 21:04:09,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 112 states have (on average 1.3660714285714286) internal successors, (153), 120 states have internal predecessors, (153), 22 states have call successors, (22), 8 states have call predecessors, (22), 14 states have return successors, (49), 20 states have call predecessors, (49), 21 states have call successors, (49) [2022-11-02 21:04:09,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 224 transitions. [2022-11-02 21:04:09,476 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 224 transitions. Word has length 72 [2022-11-02 21:04:09,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:09,476 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 224 transitions. [2022-11-02 21:04:09,476 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 21:04:09,477 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 224 transitions. [2022-11-02 21:04:09,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-02 21:04:09,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:09,479 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 21:04:09,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:09,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:04:09,695 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:09,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:09,695 INFO L85 PathProgramCache]: Analyzing trace with hash 387052583, now seen corresponding path program 1 times [2022-11-02 21:04:09,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:09,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960025634] [2022-11-02 21:04:09,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:09,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:09,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:09,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:04:09,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:09,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:04:09,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:09,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 21:04:09,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:09,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-02 21:04:09,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:09,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-02 21:04:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:10,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-02 21:04:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:10,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-02 21:04:10,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:10,029 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 21:04:10,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:10,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960025634] [2022-11-02 21:04:10,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960025634] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:04:10,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388024248] [2022-11-02 21:04:10,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:10,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:04:10,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:04:10,031 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:04:10,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 21:04:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:10,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 21:04:10,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:10,254 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 21:04:10,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:04:10,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388024248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:10,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:04:10,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-02 21:04:10,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876958915] [2022-11-02 21:04:10,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:10,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:04:10,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:10,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:04:10,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:04:10,256 INFO L87 Difference]: Start difference. First operand 149 states and 224 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 21:04:10,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:10,294 INFO L93 Difference]: Finished difference Result 294 states and 468 transitions. [2022-11-02 21:04:10,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:04:10,295 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 21:04:10,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:10,300 INFO L225 Difference]: With dead ends: 294 [2022-11-02 21:04:10,301 INFO L226 Difference]: Without dead ends: 175 [2022-11-02 21:04:10,302 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 21:04:10,304 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 6 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 160 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 21:04:10,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 160 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:04:10,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-02 21:04:10,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 151. [2022-11-02 21:04:10,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 114 states have (on average 1.3508771929824561) internal successors, (154), 122 states have internal predecessors, (154), 22 states have call successors, (22), 8 states have call predecessors, (22), 14 states have return successors, (49), 20 states have call predecessors, (49), 21 states have call successors, (49) [2022-11-02 21:04:10,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 225 transitions. [2022-11-02 21:04:10,348 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 225 transitions. Word has length 73 [2022-11-02 21:04:10,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:10,350 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 225 transitions. [2022-11-02 21:04:10,350 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 21:04:10,351 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 225 transitions. [2022-11-02 21:04:10,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-02 21:04:10,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:10,359 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 21:04:10,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:10,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 21:04:10,587 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:10,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:10,587 INFO L85 PathProgramCache]: Analyzing trace with hash -186702901, now seen corresponding path program 1 times [2022-11-02 21:04:10,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:10,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127774193] [2022-11-02 21:04:10,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:10,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:10,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:10,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:04:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:10,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:04:10,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:10,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-02 21:04:10,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:10,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 21:04:10,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:10,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 21:04:10,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:11,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-02 21:04:11,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:11,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-02 21:04:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:11,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-02 21:04:11,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-02 21:04:11,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:11,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127774193] [2022-11-02 21:04:11,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127774193] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:04:11,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914590611] [2022-11-02 21:04:11,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:11,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:04:11,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:04:11,067 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:04:11,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 21:04:11,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:11,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-02 21:04:11,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:11,361 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 21:04:11,361 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 21:04:11,379 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 21:04:11,380 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 21:04:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:04:12,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:04:13,450 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 21:04:13,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914590611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:04:13,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:04:13,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15, 10] total 27 [2022-11-02 21:04:13,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155780778] [2022-11-02 21:04:13,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:04:13,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-02 21:04:13,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:13,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-02 21:04:13,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2022-11-02 21:04:13,454 INFO L87 Difference]: Start difference. First operand 151 states and 225 transitions. Second operand has 27 states, 26 states have (on average 4.653846153846154) internal successors, (121), 24 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 21:04:14,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:14,866 INFO L93 Difference]: Finished difference Result 342 states and 517 transitions. [2022-11-02 21:04:14,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-02 21:04:14,867 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.653846153846154) internal successors, (121), 24 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 83 [2022-11-02 21:04:14,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:14,869 INFO L225 Difference]: With dead ends: 342 [2022-11-02 21:04:14,870 INFO L226 Difference]: Without dead ends: 221 [2022-11-02 21:04:14,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 161 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=244, Invalid=1826, Unknown=0, NotChecked=0, Total=2070 [2022-11-02 21:04:14,872 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 100 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1337 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:14,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 1337 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 608 Invalid, 0 Unknown, 116 Unchecked, 0.6s Time] [2022-11-02 21:04:14,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-11-02 21:04:14,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 175. [2022-11-02 21:04:14,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 134 states have (on average 1.3507462686567164) internal successors, (181), 144 states have internal predecessors, (181), 22 states have call successors, (22), 10 states have call predecessors, (22), 18 states have return successors, (54), 20 states have call predecessors, (54), 21 states have call successors, (54) [2022-11-02 21:04:14,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 257 transitions. [2022-11-02 21:04:14,897 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 257 transitions. Word has length 83 [2022-11-02 21:04:14,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:14,897 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 257 transitions. [2022-11-02 21:04:14,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.653846153846154) internal successors, (121), 24 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 21:04:14,898 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 257 transitions. [2022-11-02 21:04:14,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-02 21:04:14,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:14,900 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, 1, 1] [2022-11-02 21:04:14,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:15,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-02 21:04:15,115 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:15,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:15,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1220157194, now seen corresponding path program 1 times [2022-11-02 21:04:15,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:15,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79734982] [2022-11-02 21:04:15,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:15,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:15,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:04:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:15,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:04:15,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:15,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-02 21:04:15,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:15,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 21:04:15,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:15,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-02 21:04:15,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:15,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-02 21:04:15,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:15,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-02 21:04:15,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:15,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-02 21:04:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:15,871 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-02 21:04:15,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:15,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79734982] [2022-11-02 21:04:15,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79734982] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:04:15,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929912423] [2022-11-02 21:04:15,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:15,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:04:15,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:04:15,873 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:04:15,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 21:04:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:16,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-02 21:04:16,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:16,197 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 21:04:16,198 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 21:04:16,219 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 21:04:16,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 21:04:17,694 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 21:04:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 21:04:17,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:04:18,106 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-02 21:04:18,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929912423] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:04:18,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:04:18,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 8] total 18 [2022-11-02 21:04:18,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286712670] [2022-11-02 21:04:18,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:04:18,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 21:04:18,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:18,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 21:04:18,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=228, Unknown=1, NotChecked=30, Total=306 [2022-11-02 21:04:18,108 INFO L87 Difference]: Start difference. First operand 175 states and 257 transitions. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 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 21:04:18,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:18,962 INFO L93 Difference]: Finished difference Result 572 states and 935 transitions. [2022-11-02 21:04:18,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 21:04:18,963 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 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 85 [2022-11-02 21:04:18,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:18,967 INFO L225 Difference]: With dead ends: 572 [2022-11-02 21:04:18,967 INFO L226 Difference]: Without dead ends: 431 [2022-11-02 21:04:18,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=110, Invalid=445, Unknown=1, NotChecked=44, Total=600 [2022-11-02 21:04:18,969 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 201 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:18,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 639 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 486 Invalid, 0 Unknown, 174 Unchecked, 0.5s Time] [2022-11-02 21:04:18,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-11-02 21:04:19,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 230. [2022-11-02 21:04:19,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 185 states have (on average 1.3837837837837839) internal successors, (256), 195 states have internal predecessors, (256), 25 states have call successors, (25), 11 states have call predecessors, (25), 19 states have return successors, (60), 23 states have call predecessors, (60), 24 states have call successors, (60) [2022-11-02 21:04:19,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 341 transitions. [2022-11-02 21:04:19,023 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 341 transitions. Word has length 85 [2022-11-02 21:04:19,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:19,024 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 341 transitions. [2022-11-02 21:04:19,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 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 21:04:19,024 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 341 transitions. [2022-11-02 21:04:19,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-02 21:04:19,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:19,027 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 21:04:19,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:19,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:04:19,240 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:19,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:19,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1281472374, now seen corresponding path program 1 times [2022-11-02 21:04:19,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:19,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635831867] [2022-11-02 21:04:19,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:19,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:19,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:19,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:04:19,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:19,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:04:19,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:19,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 21:04:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:19,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 21:04:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:19,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 21:04:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:19,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-02 21:04:19,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:19,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-02 21:04:19,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:19,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-02 21:04:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:19,441 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 21:04:19,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:19,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635831867] [2022-11-02 21:04:19,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635831867] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:04:19,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924636589] [2022-11-02 21:04:19,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:19,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:04:19,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:04:19,444 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:04:19,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 21:04:19,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:19,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 21:04:19,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:19,655 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 21:04:19,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:04:19,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924636589] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:19,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:04:19,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-11-02 21:04:19,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868545469] [2022-11-02 21:04:19,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:19,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:04:19,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:19,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:04:19,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:04:19,659 INFO L87 Difference]: Start difference. First operand 230 states and 341 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 21:04:19,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:19,707 INFO L93 Difference]: Finished difference Result 410 states and 647 transitions. [2022-11-02 21:04:19,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:04:19,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 21:04:19,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:19,710 INFO L225 Difference]: With dead ends: 410 [2022-11-02 21:04:19,710 INFO L226 Difference]: Without dead ends: 218 [2022-11-02 21:04:19,712 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 21:04:19,714 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 8 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 244 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 21:04:19,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 244 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:04:19,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-11-02 21:04:19,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 215. [2022-11-02 21:04:19,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 170 states have (on average 1.3470588235294119) internal successors, (229), 180 states have internal predecessors, (229), 25 states have call successors, (25), 11 states have call predecessors, (25), 19 states have return successors, (60), 23 states have call predecessors, (60), 24 states have call successors, (60) [2022-11-02 21:04:19,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 314 transitions. [2022-11-02 21:04:19,747 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 314 transitions. Word has length 83 [2022-11-02 21:04:19,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:19,748 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 314 transitions. [2022-11-02 21:04:19,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 21:04:19,748 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 314 transitions. [2022-11-02 21:04:19,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-02 21:04:19,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:19,751 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2022-11-02 21:04:19,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:19,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:04:19,979 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:19,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:19,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1051920264, now seen corresponding path program 1 times [2022-11-02 21:04:19,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:19,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51858897] [2022-11-02 21:04:19,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:19,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:20,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:04:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:20,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:04:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:20,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 21:04:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:20,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 21:04:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:20,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 21:04:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:20,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-02 21:04:20,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:20,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-02 21:04:20,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:20,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-02 21:04:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:20,574 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 21:04:20,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:20,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51858897] [2022-11-02 21:04:20,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51858897] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:04:20,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957061416] [2022-11-02 21:04:20,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:20,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:04:20,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:04:20,579 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:04:20,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 21:04:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:20,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 21:04:20,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:20,787 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 21:04:20,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:04:20,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957061416] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:20,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:04:20,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2022-11-02 21:04:20,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061529539] [2022-11-02 21:04:20,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:20,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:04:20,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:20,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:04:20,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:04:20,791 INFO L87 Difference]: Start difference. First operand 215 states and 314 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 21:04:20,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:20,828 INFO L93 Difference]: Finished difference Result 323 states and 488 transitions. [2022-11-02 21:04:20,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:04:20,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 21:04:20,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:20,830 INFO L225 Difference]: With dead ends: 323 [2022-11-02 21:04:20,830 INFO L226 Difference]: Without dead ends: 136 [2022-11-02 21:04:20,832 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 21:04:20,833 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:20,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 235 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:04:20,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-02 21:04:20,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 129. [2022-11-02 21:04:20,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 98 states have (on average 1.2346938775510203) internal successors, (121), 104 states have internal predecessors, (121), 17 states have call successors, (17), 9 states have call predecessors, (17), 13 states have return successors, (29), 15 states have call predecessors, (29), 16 states have call successors, (29) [2022-11-02 21:04:20,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 167 transitions. [2022-11-02 21:04:20,849 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 167 transitions. Word has length 83 [2022-11-02 21:04:20,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:20,849 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 167 transitions. [2022-11-02 21:04:20,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 21:04:20,849 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 167 transitions. [2022-11-02 21:04:20,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-02 21:04:20,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:20,851 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 21:04:20,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:21,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 21:04:21,079 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:21,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:21,079 INFO L85 PathProgramCache]: Analyzing trace with hash 806524548, now seen corresponding path program 1 times [2022-11-02 21:04:21,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:21,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372585112] [2022-11-02 21:04:21,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:21,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:21,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:21,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:04:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:21,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:04:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:21,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-02 21:04:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:21,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 21:04:21,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:21,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-02 21:04:21,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:21,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-02 21:04:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:21,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-02 21:04:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:21,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-02 21:04:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:21,539 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-02 21:04:21,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:21,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372585112] [2022-11-02 21:04:21,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372585112] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:04:21,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484624562] [2022-11-02 21:04:21,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:21,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:04:21,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:04:21,542 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:04:21,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 21:04:21,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:21,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-02 21:04:21,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:21,881 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 21:04:21,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:04:21,888 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 21:04:21,975 INFO L356 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-11-02 21:04:21,977 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-11-02 21:04:22,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:22,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:04:22,178 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_33| 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 21:04:22,182 INFO L158 Benchmark]: Toolchain (without parser) took 27199.75ms. Allocated memory was 96.5MB in the beginning and 325.1MB in the end (delta: 228.6MB). Free memory was 68.3MB in the beginning and 207.6MB in the end (delta: -139.4MB). Peak memory consumption was 88.4MB. Max. memory is 16.1GB. [2022-11-02 21:04:22,182 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 96.5MB. Free memory was 69.3MB in the beginning and 69.2MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 21:04:22,182 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2265.75ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 68.0MB in the beginning and 76.2MB in the end (delta: -8.2MB). Peak memory consumption was 53.8MB. Max. memory is 16.1GB. [2022-11-02 21:04:22,183 INFO L158 Benchmark]: Boogie Procedure Inliner took 149.85ms. Allocated memory is still 117.4MB. Free memory was 76.2MB in the beginning and 70.6MB in the end (delta: 5.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-02 21:04:22,183 INFO L158 Benchmark]: Boogie Preprocessor took 84.36ms. Allocated memory is still 117.4MB. Free memory was 70.6MB in the beginning and 67.8MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-02 21:04:22,183 INFO L158 Benchmark]: RCFGBuilder took 763.19ms. Allocated memory is still 117.4MB. Free memory was 67.8MB in the beginning and 44.8MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2022-11-02 21:04:22,183 INFO L158 Benchmark]: TraceAbstraction took 23928.15ms. Allocated memory was 117.4MB in the beginning and 325.1MB in the end (delta: 207.6MB). Free memory was 44.1MB in the beginning and 207.6MB in the end (delta: -163.6MB). Peak memory consumption was 45.1MB. Max. memory is 16.1GB. [2022-11-02 21:04:22,185 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 96.5MB. Free memory was 69.3MB in the beginning and 69.2MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2265.75ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 68.0MB in the beginning and 76.2MB in the end (delta: -8.2MB). Peak memory consumption was 53.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 149.85ms. Allocated memory is still 117.4MB. Free memory was 76.2MB in the beginning and 70.6MB in the end (delta: 5.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 84.36ms. Allocated memory is still 117.4MB. Free memory was 70.6MB in the beginning and 67.8MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 763.19ms. Allocated memory is still 117.4MB. Free memory was 67.8MB in the beginning and 44.8MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 23928.15ms. Allocated memory was 117.4MB in the beginning and 325.1MB in the end (delta: 207.6MB). Free memory was 44.1MB in the beginning and 207.6MB in the end (delta: -163.6MB). Peak memory consumption was 45.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: var is still there: |v_#memory_$Pointer$.base_33| input size 44 context size 44 output size 44 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: var is still there: |v_#memory_$Pointer$.base_33| 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 21:04:22,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/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_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/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_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/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 a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 --- 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 21:04:24,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:04:24,527 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:04:24,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:04:24,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:04:24,577 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:04:24,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:04:24,585 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:04:24,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:04:24,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:04:24,598 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:04:24,601 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:04:24,601 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:04:24,604 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:04:24,606 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:04:24,607 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:04:24,609 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:04:24,610 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:04:24,612 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:04:24,621 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:04:24,624 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:04:24,625 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:04:24,628 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:04:24,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:04:24,639 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:04:24,639 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:04:24,640 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:04:24,642 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:04:24,643 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:04:24,644 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:04:24,644 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:04:24,645 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:04:24,647 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:04:24,648 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:04:24,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:04:24,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:04:24,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:04:24,651 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:04:24,651 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:04:24,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:04:24,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:04:24,659 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-11-02 21:04:24,710 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:04:24,710 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:04:24,712 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:04:24,712 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:04:24,713 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:04:24,714 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:04:24,715 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:04:24,715 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:04:24,716 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:04:24,716 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:04:24,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:04:24,717 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:04:24,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:04:24,718 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:04:24,719 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 21:04:24,719 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-02 21:04:24,719 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-02 21:04:24,719 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:04:24,720 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:04:24,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:04:24,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:04:24,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:04:24,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:04:24,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:04:24,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:04:24,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:04:24,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:04:24,723 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-02 21:04:24,723 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-02 21:04:24,723 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:04:24,724 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:04:24,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:04:24,724 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-02 21:04:24,725 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_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 [2022-11-02 21:04:25,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:04:25,152 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:04:25,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:04:25,157 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:04:25,158 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:04:25,160 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2022-11-02 21:04:25,229 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/data/2d5e7df97/bbaa7cbc9d5643bd8fee538bef558a64/FLAG4e4d4c96a [2022-11-02 21:04:26,053 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:04:26,053 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2022-11-02 21:04:26,085 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/data/2d5e7df97/bbaa7cbc9d5643bd8fee538bef558a64/FLAG4e4d4c96a [2022-11-02 21:04:26,156 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/data/2d5e7df97/bbaa7cbc9d5643bd8fee538bef558a64 [2022-11-02 21:04:26,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:04:26,159 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:04:26,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:04:26,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:04:26,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:04:26,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:04:26" (1/1) ... [2022-11-02 21:04:26,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32898810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:26, skipping insertion in model container [2022-11-02 21:04:26,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:04:26" (1/1) ... [2022-11-02 21:04:26,173 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:04:26,296 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:04:26,586 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_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2022-11-02 21:04:26,594 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_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2022-11-02 21:04:27,544 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:27,544 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:27,549 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:27,550 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:27,551 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:27,563 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:27,564 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:27,566 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:27,566 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:27,568 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:27,569 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:27,570 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:27,570 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:27,944 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-02 21:04:27,946 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-02 21:04:27,947 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-02 21:04:27,948 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-02 21:04:27,950 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-02 21:04:27,950 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-02 21:04:27,951 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-02 21:04:27,952 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-02 21:04:27,953 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-02 21:04:27,953 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-02 21:04:28,120 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-02 21:04:28,150 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:04:28,180 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-02 21:04:28,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:04:28,239 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_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2022-11-02 21:04:28,240 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_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2022-11-02 21:04:28,320 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:28,322 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:28,330 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:28,331 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:28,332 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:28,338 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:28,342 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:28,349 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:28,350 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:28,351 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:28,352 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:28,352 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:28,352 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:28,405 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-02 21:04:28,408 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-02 21:04:28,409 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-02 21:04:28,412 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-02 21:04:28,418 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-02 21:04:28,418 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-02 21:04:28,419 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-02 21:04:28,420 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-02 21:04:28,420 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-02 21:04:28,421 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-02 21:04:28,458 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-02 21:04:28,472 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:04:28,479 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:04:28,492 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_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2022-11-02 21:04:28,492 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_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2022-11-02 21:04:28,562 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:28,563 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:28,563 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:28,564 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:28,564 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:28,575 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:28,579 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:28,580 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:28,581 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:28,581 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:28,582 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:28,583 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:28,583 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 21:04:28,624 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-02 21:04:28,625 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-02 21:04:28,625 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-02 21:04:28,626 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-02 21:04:28,628 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-02 21:04:28,628 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-02 21:04:28,629 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-02 21:04:28,629 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-02 21:04:28,629 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-02 21:04:28,630 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-02 21:04:28,662 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-02 21:04:28,681 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:04:28,872 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:04:28,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:28 WrapperNode [2022-11-02 21:04:28,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:04:28,874 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:04:28,874 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:04:28,874 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:04:28,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:28" (1/1) ... [2022-11-02 21:04:28,954 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:28" (1/1) ... [2022-11-02 21:04:28,990 INFO L138 Inliner]: procedures = 698, calls = 1040, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 137 [2022-11-02 21:04:28,990 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:04:28,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:04:28,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:04:28,991 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:04:29,000 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:28" (1/1) ... [2022-11-02 21:04:29,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:28" (1/1) ... [2022-11-02 21:04:29,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:28" (1/1) ... [2022-11-02 21:04:29,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:28" (1/1) ... [2022-11-02 21:04:29,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:28" (1/1) ... [2022-11-02 21:04:29,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:28" (1/1) ... [2022-11-02 21:04:29,033 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:28" (1/1) ... [2022-11-02 21:04:29,039 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:28" (1/1) ... [2022-11-02 21:04:29,055 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:04:29,056 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:04:29,056 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:04:29,056 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:04:29,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:28" (1/1) ... [2022-11-02 21:04:29,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:04:29,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:04:29,095 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:04:29,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:04:29,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 21:04:29,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-02 21:04:29,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-02 21:04:29,146 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-02 21:04:29,147 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-02 21:04:29,147 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-02 21:04:29,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 21:04:29,147 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-02 21:04:29,148 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-02 21:04:29,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:04:29,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-02 21:04:29,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:04:29,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:04:29,149 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-02 21:04:29,149 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-02 21:04:29,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 21:04:29,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 21:04:29,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-02 21:04:29,150 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-02 21:04:29,150 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-02 21:04:29,539 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:04:29,541 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:04:29,973 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:04:29,979 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:04:29,980 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 21:04:29,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:04:29 BoogieIcfgContainer [2022-11-02 21:04:29,982 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:04:29,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:04:29,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:04:29,988 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:04:29,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:04:26" (1/3) ... [2022-11-02 21:04:29,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5519f667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:04:29, skipping insertion in model container [2022-11-02 21:04:29,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:28" (2/3) ... [2022-11-02 21:04:29,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5519f667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:04:29, skipping insertion in model container [2022-11-02 21:04:29,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:04:29" (3/3) ... [2022-11-02 21:04:29,991 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_end_harness.i [2022-11-02 21:04:30,008 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:04:30,009 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 21:04:30,056 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:04:30,062 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;@3aca96e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:04:30,063 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 21:04:30,067 INFO L276 IsEmpty]: Start isEmpty. Operand has 68 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 49 states have internal predecessors, (65), 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 21:04:30,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-02 21:04:30,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:30,078 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 21:04:30,078 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:30,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:30,084 INFO L85 PathProgramCache]: Analyzing trace with hash -2107862704, now seen corresponding path program 1 times [2022-11-02 21:04:30,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:30,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1221094678] [2022-11-02 21:04:30,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:30,098 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:30,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:30,102 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:30,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-02 21:04:30,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:30,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-02 21:04:30,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:30,423 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 21:04:30,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:04:30,425 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:30,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1221094678] [2022-11-02 21:04:30,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1221094678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:30,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:30,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 21:04:30,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414739404] [2022-11-02 21:04:30,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:30,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 21:04:30,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:30,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 21:04:30,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 21:04:30,466 INFO L87 Difference]: Start difference. First operand has 68 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 49 states have internal predecessors, (65), 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 21:04:30,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:30,497 INFO L93 Difference]: Finished difference Result 128 states and 184 transitions. [2022-11-02 21:04:30,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 21:04:30,501 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 21:04:30,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:30,510 INFO L225 Difference]: With dead ends: 128 [2022-11-02 21:04:30,510 INFO L226 Difference]: Without dead ends: 63 [2022-11-02 21:04:30,514 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 21:04:30,517 INFO L413 NwaCegarLoop]: 87 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, 87 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 21:04:30,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:04:30,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-02 21:04:30,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-02 21:04:30,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 45 states have internal predecessors, (57), 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 21:04:30,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2022-11-02 21:04:30,573 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 68 [2022-11-02 21:04:30,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:30,574 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2022-11-02 21:04:30,574 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 21:04:30,574 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2022-11-02 21:04:30,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-02 21:04:30,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:30,578 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 21:04:30,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:30,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:30,798 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:30,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:30,799 INFO L85 PathProgramCache]: Analyzing trace with hash 900796622, now seen corresponding path program 1 times [2022-11-02 21:04:30,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:30,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [357169847] [2022-11-02 21:04:30,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:30,800 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:30,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:30,804 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:30,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-02 21:04:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:31,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 21:04:31,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:31,160 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 21:04:31,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:04:31,161 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:31,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [357169847] [2022-11-02 21:04:31,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [357169847] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:31,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:31,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:04:31,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509658739] [2022-11-02 21:04:31,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:31,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:04:31,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:31,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:04:31,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:04:31,171 INFO L87 Difference]: Start difference. First operand 63 states and 82 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 21:04:31,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:31,288 INFO L93 Difference]: Finished difference Result 114 states and 152 transitions. [2022-11-02 21:04:31,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:04:31,289 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 21:04:31,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:31,292 INFO L225 Difference]: With dead ends: 114 [2022-11-02 21:04:31,292 INFO L226 Difference]: Without dead ends: 65 [2022-11-02 21:04:31,293 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 21:04:31,294 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 2 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 370 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 21:04:31,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 370 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:04:31,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-02 21:04:31,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-11-02 21:04:31,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 45 states have (on average 1.288888888888889) internal successors, (58), 47 states have internal predecessors, (58), 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 21:04:31,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 86 transitions. [2022-11-02 21:04:31,309 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 86 transitions. Word has length 68 [2022-11-02 21:04:31,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:31,315 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 86 transitions. [2022-11-02 21:04:31,315 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 21:04:31,315 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 86 transitions. [2022-11-02 21:04:31,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-02 21:04:31,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:31,317 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 21:04:31,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:31,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:31,518 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:31,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:31,519 INFO L85 PathProgramCache]: Analyzing trace with hash 577933322, now seen corresponding path program 1 times [2022-11-02 21:04:31,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:31,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [379065910] [2022-11-02 21:04:31,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:31,520 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:31,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:31,521 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:31,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-02 21:04:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:31,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 21:04:31,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:31,953 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 21:04:31,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:04:31,953 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:31,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [379065910] [2022-11-02 21:04:31,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [379065910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:31,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:31,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:04:31,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124526479] [2022-11-02 21:04:31,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:31,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:04:31,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:31,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:04:31,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:04:31,965 INFO L87 Difference]: Start difference. First operand 65 states and 86 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 21:04:32,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:32,216 INFO L93 Difference]: Finished difference Result 119 states and 161 transitions. [2022-11-02 21:04:32,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:04:32,218 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 21:04:32,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:32,219 INFO L225 Difference]: With dead ends: 119 [2022-11-02 21:04:32,219 INFO L226 Difference]: Without dead ends: 68 [2022-11-02 21:04:32,220 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 21:04:32,221 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 38 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 279 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 21:04:32,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 279 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:04:32,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-02 21:04:32,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-02 21:04:32,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 50 states have internal predecessors, (60), 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 21:04:32,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2022-11-02 21:04:32,243 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 70 [2022-11-02 21:04:32,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:32,243 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2022-11-02 21:04:32,243 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 21:04:32,244 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2022-11-02 21:04:32,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-02 21:04:32,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:32,245 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 21:04:32,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:32,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:32,446 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:32,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:32,447 INFO L85 PathProgramCache]: Analyzing trace with hash -34807881, now seen corresponding path program 1 times [2022-11-02 21:04:32,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:32,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111741617] [2022-11-02 21:04:32,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:32,448 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:32,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:32,451 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:32,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-02 21:04:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:32,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:04:32,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:32,901 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 21:04:32,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:04:32,902 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:32,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111741617] [2022-11-02 21:04:32,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111741617] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:32,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:32,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 21:04:32,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746518388] [2022-11-02 21:04:32,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:32,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:04:32,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:32,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:04:32,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:04:32,906 INFO L87 Difference]: Start difference. First operand 68 states and 90 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 21:04:33,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:33,261 INFO L93 Difference]: Finished difference Result 134 states and 185 transitions. [2022-11-02 21:04:33,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 21:04:33,262 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 21:04:33,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:33,264 INFO L225 Difference]: With dead ends: 134 [2022-11-02 21:04:33,264 INFO L226 Difference]: Without dead ends: 80 [2022-11-02 21:04:33,264 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 21:04:33,265 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 66 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 331 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 21:04:33,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 331 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 21:04:33,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-02 21:04:33,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2022-11-02 21:04:33,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 52 states have internal predecessors, (63), 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 21:04:33,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 93 transitions. [2022-11-02 21:04:33,286 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 93 transitions. Word has length 72 [2022-11-02 21:04:33,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:33,290 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 93 transitions. [2022-11-02 21:04:33,290 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 21:04:33,291 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 93 transitions. [2022-11-02 21:04:33,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-02 21:04:33,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:33,298 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 21:04:33,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:33,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:33,512 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:33,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:33,512 INFO L85 PathProgramCache]: Analyzing trace with hash 387052583, now seen corresponding path program 1 times [2022-11-02 21:04:33,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:33,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834140857] [2022-11-02 21:04:33,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:33,513 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:33,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:33,515 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:33,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-02 21:04:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:33,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:04:33,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:33,877 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 21:04:33,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:04:33,878 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:33,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834140857] [2022-11-02 21:04:33,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834140857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:33,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:33,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:04:33,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855859444] [2022-11-02 21:04:33,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:33,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:04:33,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:33,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:04:33,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:04:33,881 INFO L87 Difference]: Start difference. First operand 70 states and 93 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 21:04:34,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:34,104 INFO L93 Difference]: Finished difference Result 135 states and 189 transitions. [2022-11-02 21:04:34,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:04:34,105 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 21:04:34,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:34,107 INFO L225 Difference]: With dead ends: 135 [2022-11-02 21:04:34,107 INFO L226 Difference]: Without dead ends: 79 [2022-11-02 21:04:34,108 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 21:04:34,109 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 51 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:34,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 218 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:04:34,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-02 21:04:34,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2022-11-02 21:04:34,122 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 21:04:34,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2022-11-02 21:04:34,124 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 73 [2022-11-02 21:04:34,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:34,124 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2022-11-02 21:04:34,125 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 21:04:34,125 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2022-11-02 21:04:34,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-02 21:04:34,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:34,126 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 21:04:34,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:34,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:34,349 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:34,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:34,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1595103561, now seen corresponding path program 1 times [2022-11-02 21:04:34,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:34,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774407738] [2022-11-02 21:04:34,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:34,351 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:34,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:34,353 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:34,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-02 21:04:34,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:34,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 21:04:34,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:34,676 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 21:04:34,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:04:34,677 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:34,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774407738] [2022-11-02 21:04:34,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774407738] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:34,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:34,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 21:04:34,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14959677] [2022-11-02 21:04:34,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:34,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:04:34,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:34,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:04:34,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:04:34,680 INFO L87 Difference]: Start difference. First operand 71 states and 94 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 21:04:34,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:34,787 INFO L93 Difference]: Finished difference Result 134 states and 181 transitions. [2022-11-02 21:04:34,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 21:04:34,788 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 21:04:34,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:34,790 INFO L225 Difference]: With dead ends: 134 [2022-11-02 21:04:34,790 INFO L226 Difference]: Without dead ends: 77 [2022-11-02 21:04:34,791 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 21:04:34,792 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 4 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 457 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 21:04:34,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 457 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:04:34,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-02 21:04:34,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2022-11-02 21:04:34,805 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 21:04:34,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 95 transitions. [2022-11-02 21:04:34,820 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 95 transitions. Word has length 81 [2022-11-02 21:04:34,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:34,821 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 95 transitions. [2022-11-02 21:04:34,821 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 21:04:34,821 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 95 transitions. [2022-11-02 21:04:34,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-02 21:04:34,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:34,822 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 21:04:34,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:35,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:35,023 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:35,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:35,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1786751690, now seen corresponding path program 1 times [2022-11-02 21:04:35,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:35,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2119233816] [2022-11-02 21:04:35,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:35,025 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:35,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:35,026 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:35,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-02 21:04:35,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:35,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 21:04:35,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:36,136 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 21:04:36,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:04:36,454 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 21:04:36,455 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:36,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2119233816] [2022-11-02 21:04:36,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2119233816] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:04:36,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:04:36,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-11-02 21:04:36,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452887594] [2022-11-02 21:04:36,456 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:04:36,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 21:04:36,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:36,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 21:04:36,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-02 21:04:36,457 INFO L87 Difference]: Start difference. First operand 72 states and 95 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 21:04:37,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:37,362 INFO L93 Difference]: Finished difference Result 173 states and 248 transitions. [2022-11-02 21:04:37,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 21:04:37,363 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 21:04:37,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:37,365 INFO L225 Difference]: With dead ends: 173 [2022-11-02 21:04:37,365 INFO L226 Difference]: Without dead ends: 115 [2022-11-02 21:04:37,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-11-02 21:04:37,366 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 145 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:37,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 463 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 140 Invalid, 0 Unknown, 43 Unchecked, 0.5s Time] [2022-11-02 21:04:37,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-02 21:04:37,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 89. [2022-11-02 21:04:37,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.303030303030303) internal successors, (86), 69 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 21:04:37,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 118 transitions. [2022-11-02 21:04:37,385 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 118 transitions. Word has length 83 [2022-11-02 21:04:37,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:37,385 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 118 transitions. [2022-11-02 21:04:37,386 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 21:04:37,386 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 118 transitions. [2022-11-02 21:04:37,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-02 21:04:37,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:37,387 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 21:04:37,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:37,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:37,603 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:37,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:37,603 INFO L85 PathProgramCache]: Analyzing trace with hash 2090819000, now seen corresponding path program 1 times [2022-11-02 21:04:37,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:37,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411465342] [2022-11-02 21:04:37,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:37,604 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:37,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:37,605 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:37,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-02 21:04:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:37,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 21:04:37,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:37,849 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 21:04:37,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:04:37,850 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:37,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411465342] [2022-11-02 21:04:37,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411465342] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:37,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:37,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:04:37,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874252827] [2022-11-02 21:04:37,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:37,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:04:37,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:37,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:04:37,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:04:37,856 INFO L87 Difference]: Start difference. First operand 89 states and 118 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 21:04:37,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:37,914 INFO L93 Difference]: Finished difference Result 167 states and 233 transitions. [2022-11-02 21:04:37,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:04:37,915 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 21:04:37,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:37,917 INFO L225 Difference]: With dead ends: 167 [2022-11-02 21:04:37,918 INFO L226 Difference]: Without dead ends: 92 [2022-11-02 21:04:37,918 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 21:04:37,919 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 8 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 244 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 21:04:37,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 244 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:04:37,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-02 21:04:37,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2022-11-02 21:04:37,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.2878787878787878) internal successors, (85), 69 states have internal predecessors, (85), 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 21:04:37,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 117 transitions. [2022-11-02 21:04:37,938 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 117 transitions. Word has length 83 [2022-11-02 21:04:37,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:37,939 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 117 transitions. [2022-11-02 21:04:37,939 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 21:04:37,939 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 117 transitions. [2022-11-02 21:04:37,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-02 21:04:37,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:37,941 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 21:04:37,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-11-02 21:04:38,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:38,155 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:38,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:38,155 INFO L85 PathProgramCache]: Analyzing trace with hash -242573638, now seen corresponding path program 1 times [2022-11-02 21:04:38,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:38,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1658726478] [2022-11-02 21:04:38,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:38,156 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:38,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:38,157 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:38,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-02 21:04:38,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:38,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:04:38,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:38,421 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 21:04:38,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:04:38,421 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:38,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1658726478] [2022-11-02 21:04:38,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1658726478] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:38,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:38,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:04:38,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222427888] [2022-11-02 21:04:38,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:38,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:04:38,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:38,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:04:38,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:04:38,424 INFO L87 Difference]: Start difference. First operand 89 states and 117 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 21:04:38,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:38,495 INFO L93 Difference]: Finished difference Result 165 states and 229 transitions. [2022-11-02 21:04:38,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 21:04:38,495 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 21:04:38,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:38,497 INFO L225 Difference]: With dead ends: 165 [2022-11-02 21:04:38,497 INFO L226 Difference]: Without dead ends: 90 [2022-11-02 21:04:38,497 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 21:04:38,498 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 6 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 311 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 21:04:38,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 311 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:04:38,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-02 21:04:38,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2022-11-02 21:04:38,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 63 states have (on average 1.253968253968254) internal successors, (79), 66 states have internal predecessors, (79), 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 21:04:38,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 111 transitions. [2022-11-02 21:04:38,512 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 111 transitions. Word has length 83 [2022-11-02 21:04:38,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:38,512 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 111 transitions. [2022-11-02 21:04:38,512 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 21:04:38,512 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 111 transitions. [2022-11-02 21:04:38,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 21:04:38,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:38,514 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 21:04:38,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:38,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:38,735 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:38,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:38,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1911369352, now seen corresponding path program 1 times [2022-11-02 21:04:38,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:38,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079357704] [2022-11-02 21:04:38,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:38,736 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:38,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:38,738 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:38,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-02 21:04:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:39,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 21:04:39,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:40,735 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 21:04:40,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:04:44,358 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 21:04:44,359 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 21:04:44,402 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-02 21:04:44,403 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 21:04:44,474 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 21:04:44,474 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:44,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079357704] [2022-11-02 21:04:44,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079357704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:04:44,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:04:44,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2022-11-02 21:04:44,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389820192] [2022-11-02 21:04:44,475 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:04:44,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 21:04:44,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:44,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 21:04:44,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-11-02 21:04:44,477 INFO L87 Difference]: Start difference. First operand 86 states and 111 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 21:04:46,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:46,160 INFO L93 Difference]: Finished difference Result 197 states and 252 transitions. [2022-11-02 21:04:46,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-02 21:04:46,161 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 21:04:46,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:46,162 INFO L225 Difference]: With dead ends: 197 [2022-11-02 21:04:46,162 INFO L226 Difference]: Without dead ends: 124 [2022-11-02 21:04:46,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 151 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2022-11-02 21:04:46,164 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 106 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:46,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 677 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 151 Invalid, 0 Unknown, 145 Unchecked, 0.8s Time] [2022-11-02 21:04:46,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-02 21:04:46,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 90. [2022-11-02 21:04:46,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 69 states have internal predecessors, (81), 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 21:04:46,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2022-11-02 21:04:46,185 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 84 [2022-11-02 21:04:46,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:46,186 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2022-11-02 21:04:46,187 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 21:04:46,187 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2022-11-02 21:04:46,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 21:04:46,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:46,189 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 21:04:46,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:46,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:46,402 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:46,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:46,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1164062340, now seen corresponding path program 1 times [2022-11-02 21:04:46,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:46,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1899112492] [2022-11-02 21:04:46,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:46,403 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:46,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:46,404 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:46,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-02 21:04:46,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:46,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-02 21:04:46,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:46,848 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 21:04:46,854 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 21:04:48,093 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 21:04:48,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:04:48,094 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:48,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1899112492] [2022-11-02 21:04:48,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1899112492] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:48,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:48,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-02 21:04:48,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745645207] [2022-11-02 21:04:48,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:48,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 21:04:48,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:48,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 21:04:48,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:04:48,096 INFO L87 Difference]: Start difference. First operand 90 states and 113 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 21:04:48,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:48,495 INFO L93 Difference]: Finished difference Result 234 states and 298 transitions. [2022-11-02 21:04:48,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 21:04:48,495 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 21:04:48,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:48,497 INFO L225 Difference]: With dead ends: 234 [2022-11-02 21:04:48,497 INFO L226 Difference]: Without dead ends: 162 [2022-11-02 21:04:48,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-02 21:04:48,498 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 35 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:48,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 557 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 78 Unchecked, 0.3s Time] [2022-11-02 21:04:48,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-02 21:04:48,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 146. [2022-11-02 21:04:48,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 112 states have (on average 1.25) internal successors, (140), 117 states have internal predecessors, (140), 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 21:04:48,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 183 transitions. [2022-11-02 21:04:48,523 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 183 transitions. Word has length 84 [2022-11-02 21:04:48,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:48,523 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 183 transitions. [2022-11-02 21:04:48,523 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 21:04:48,524 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 183 transitions. [2022-11-02 21:04:48,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 21:04:48,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:48,525 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 21:04:48,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:48,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:48,743 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:48,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:48,743 INFO L85 PathProgramCache]: Analyzing trace with hash 654589250, now seen corresponding path program 1 times [2022-11-02 21:04:48,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:48,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1760145403] [2022-11-02 21:04:48,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:48,744 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:48,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:48,745 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:48,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-02 21:04:48,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:48,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-02 21:04:48,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:51,193 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 21:04:51,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:04:54,637 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-02 21:04:54,637 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 21:04:54,659 INFO L356 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-02 21:04:54,659 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 21:04:54,688 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 21:04:54,688 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:54,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1760145403] [2022-11-02 21:04:54,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1760145403] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:04:54,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:04:54,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2022-11-02 21:04:54,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348403318] [2022-11-02 21:04:54,689 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:04:54,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 21:04:54,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:54,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 21:04:54,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-11-02 21:04:54,691 INFO L87 Difference]: Start difference. First operand 146 states and 183 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 21:04:56,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:56,860 INFO L93 Difference]: Finished difference Result 255 states and 317 transitions. [2022-11-02 21:04:56,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-02 21:04:56,867 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 21:04:56,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:56,870 INFO L225 Difference]: With dead ends: 255 [2022-11-02 21:04:56,871 INFO L226 Difference]: Without dead ends: 165 [2022-11-02 21:04:56,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 148 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 21:04:56,875 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 109 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:56,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 723 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 256 Invalid, 0 Unknown, 136 Unchecked, 1.1s Time] [2022-11-02 21:04:56,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-02 21:04:56,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 150. [2022-11-02 21:04:56,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 116 states have (on average 1.2327586206896552) internal successors, (143), 120 states have internal predecessors, (143), 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 21:04:56,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 186 transitions. [2022-11-02 21:04:56,913 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 186 transitions. Word has length 84 [2022-11-02 21:04:56,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:56,913 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 186 transitions. [2022-11-02 21:04:56,913 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 21:04:56,914 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 186 transitions. [2022-11-02 21:04:56,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 21:04:56,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:56,915 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 21:04:56,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-11-02 21:04:57,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:57,131 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:57,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:57,131 INFO L85 PathProgramCache]: Analyzing trace with hash 677221504, now seen corresponding path program 1 times [2022-11-02 21:04:57,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:57,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [295634972] [2022-11-02 21:04:57,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:57,132 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:57,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:57,133 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:57,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-02 21:04:57,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:57,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 21:04:57,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:58,693 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 21:04:58,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:04:59,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-02 21:04:59,668 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 21:04:59,668 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 17 treesize of output 20 [2022-11-02 21:05:00,136 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 21:05:00,136 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:05:00,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [295634972] [2022-11-02 21:05:00,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [295634972] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:05:00,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:05:00,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2022-11-02 21:05:00,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833467617] [2022-11-02 21:05:00,139 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:05:00,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-02 21:05:00,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:05:00,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-02 21:05:00,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-11-02 21:05:00,141 INFO L87 Difference]: Start difference. First operand 150 states and 186 transitions. Second operand has 26 states, 24 states have (on average 4.416666666666667) internal successors, (106), 24 states have internal predecessors, (106), 8 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-02 21:05:03,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:03,539 INFO L93 Difference]: Finished difference Result 342 states and 460 transitions. [2022-11-02 21:05:03,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:05:03,540 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.416666666666667) internal successors, (106), 24 states have internal predecessors, (106), 8 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) Word has length 84 [2022-11-02 21:05:03,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:03,542 INFO L225 Difference]: With dead ends: 342 [2022-11-02 21:05:03,543 INFO L226 Difference]: Without dead ends: 259 [2022-11-02 21:05:03,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 148 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=200, Invalid=1282, Unknown=0, NotChecked=0, Total=1482 [2022-11-02 21:05:03,544 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 199 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:03,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 942 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 706 Invalid, 0 Unknown, 101 Unchecked, 2.2s Time] [2022-11-02 21:05:03,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-02 21:05:03,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 208. [2022-11-02 21:05:03,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 158 states have (on average 1.2088607594936709) internal successors, (191), 164 states have internal predecessors, (191), 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 21:05:03,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 274 transitions. [2022-11-02 21:05:03,592 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 274 transitions. Word has length 84 [2022-11-02 21:05:03,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:03,593 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 274 transitions. [2022-11-02 21:05:03,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.416666666666667) internal successors, (106), 24 states have internal predecessors, (106), 8 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-02 21:05:03,593 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 274 transitions. [2022-11-02 21:05:03,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 21:05:03,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:03,595 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 21:05:03,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:03,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:05:03,816 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:03,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:03,817 INFO L85 PathProgramCache]: Analyzing trace with hash 951981118, now seen corresponding path program 1 times [2022-11-02 21:05:03,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:05:03,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779907661] [2022-11-02 21:05:03,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:03,818 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:05:03,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:05:03,819 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:05:03,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-02 21:05:04,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:04,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:05:04,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:04,140 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 21:05:04,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:05:04,141 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:05:04,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [779907661] [2022-11-02 21:05:04,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [779907661] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:04,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:05:04,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:05:04,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189756897] [2022-11-02 21:05:04,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:04,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:05:04,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:05:04,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:05:04,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:05:04,144 INFO L87 Difference]: Start difference. First operand 208 states and 274 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 21:05:04,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:04,323 INFO L93 Difference]: Finished difference Result 456 states and 622 transitions. [2022-11-02 21:05:04,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:05:04,324 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 21:05:04,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:04,326 INFO L225 Difference]: With dead ends: 456 [2022-11-02 21:05:04,326 INFO L226 Difference]: Without dead ends: 195 [2022-11-02 21:05:04,328 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 21:05:04,329 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 48 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:04,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 316 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:05:04,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-11-02 21:05:04,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2022-11-02 21:05:04,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 143 states have (on average 1.1818181818181819) internal successors, (169), 150 states have internal predecessors, (169), 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 21:05:04,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 252 transitions. [2022-11-02 21:05:04,388 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 252 transitions. Word has length 84 [2022-11-02 21:05:04,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:04,388 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 252 transitions. [2022-11-02 21:05:04,388 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 21:05:04,388 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 252 transitions. [2022-11-02 21:05:04,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-02 21:05:04,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:04,391 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 21:05:04,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:04,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:05:04,607 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:04,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:04,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1135728258, now seen corresponding path program 1 times [2022-11-02 21:05:04,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:05:04,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [897648955] [2022-11-02 21:05:04,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:04,608 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:05:04,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:05:04,610 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:05:04,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-02 21:05:04,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:04,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 21:05:04,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:05,024 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 21:05:05,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:05:05,024 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:05:05,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [897648955] [2022-11-02 21:05:05,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [897648955] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:05,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:05:05,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 21:05:05,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359755662] [2022-11-02 21:05:05,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:05,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:05:05,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:05:05,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:05:05,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:05:05,027 INFO L87 Difference]: Start difference. First operand 193 states and 252 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 21:05:05,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:05,370 INFO L93 Difference]: Finished difference Result 285 states and 379 transitions. [2022-11-02 21:05:05,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:05:05,371 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 21:05:05,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:05,373 INFO L225 Difference]: With dead ends: 285 [2022-11-02 21:05:05,373 INFO L226 Difference]: Without dead ends: 192 [2022-11-02 21:05:05,374 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 21:05:05,375 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 42 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:05,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 316 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 21:05:05,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-02 21:05:05,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2022-11-02 21:05:05,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 141 states have (on average 1.1702127659574468) internal successors, (165), 147 states have internal predecessors, (165), 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 21:05:05,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 244 transitions. [2022-11-02 21:05:05,413 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 244 transitions. Word has length 86 [2022-11-02 21:05:05,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:05,413 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 244 transitions. [2022-11-02 21:05:05,413 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 21:05:05,414 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 244 transitions. [2022-11-02 21:05:05,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-02 21:05:05,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:05,415 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 21:05:05,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:05,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:05:05,631 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:05,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:05,631 INFO L85 PathProgramCache]: Analyzing trace with hash 868564162, now seen corresponding path program 1 times [2022-11-02 21:05:05,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:05:05,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049738724] [2022-11-02 21:05:05,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:05,632 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:05:05,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:05:05,633 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:05:05,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-02 21:05:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:05,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-02 21:05:05,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:06,162 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-02 21:05:06,162 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 21:05:06,174 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 21:05:06,190 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 21:05:06,309 INFO L356 Elim1Store]: treesize reduction 35, result has 2.8 percent of original size [2022-11-02 21:05:06,310 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 21:05:06,316 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 21:05:06,499 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_35| (_ BitVec 64)) (v_DerPreprocessor_2 (Array (_ BitVec 64) (_ BitVec 64))) (v_DerPreprocessor_1 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_35|) (_ bv24 64)))) (and (not (= (_ bv0 64) .cse0)) (= .cse0 (select v_DerPreprocessor_2 (_ bv24 64))) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_1) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_35| v_DerPreprocessor_2) .cse0 v_DerPreprocessor_1) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_35| v_DerPreprocessor_2) .cse0) v_DerPreprocessor_1)))) is different from true [2022-11-02 21:05:07,086 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_DerPreprocessor_3 (Array (_ BitVec 64) (_ BitVec 64))) (v_DerPreprocessor_4 (Array (_ BitVec 64) (_ BitVec 64))) (|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_36| (_ BitVec 64))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_36|) (_ bv24 64)))) (and (not (= (_ bv0 64) .cse0)) (= v_DerPreprocessor_4 (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_4) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_36| v_DerPreprocessor_3) .cse0 v_DerPreprocessor_4) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_36| v_DerPreprocessor_3) .cse0)) (= (select v_DerPreprocessor_3 (_ bv24 64)) .cse0)))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_35| (_ BitVec 64)) (v_DerPreprocessor_2 (Array (_ BitVec 64) (_ BitVec 64))) (v_DerPreprocessor_1 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_35|) (_ bv24 64)))) (and (not (= (_ bv0 64) .cse1)) (= .cse1 (select v_DerPreprocessor_2 (_ bv24 64))) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse1 v_DerPreprocessor_1) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_35| v_DerPreprocessor_2) .cse1 v_DerPreprocessor_1) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_35| v_DerPreprocessor_2) .cse1) v_DerPreprocessor_1))))) is different from true [2022-11-02 21:05:07,597 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_DerPreprocessor_3 (Array (_ BitVec 64) (_ BitVec 64))) (|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_10| (_ BitVec 64)) (v_DerPreprocessor_4 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_10|) (_ bv24 64)))) (and (= (select v_DerPreprocessor_3 (_ bv24 64)) .cse0) (not (= (_ bv0 64) .cse0)) (= v_DerPreprocessor_4 (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_4) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_10| v_DerPreprocessor_3) .cse0 v_DerPreprocessor_4) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_10| v_DerPreprocessor_3) .cse0))))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_35| (_ BitVec 64)) (v_DerPreprocessor_2 (Array (_ BitVec 64) (_ BitVec 64))) (v_DerPreprocessor_1 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_35|) (_ bv24 64)))) (and (not (= (_ bv0 64) .cse1)) (= .cse1 (select v_DerPreprocessor_2 (_ bv24 64))) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse1 v_DerPreprocessor_1) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_35| v_DerPreprocessor_2) .cse1 v_DerPreprocessor_1) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_35| v_DerPreprocessor_2) .cse1) v_DerPreprocessor_1)))) (exists ((v_DerPreprocessor_6 (Array (_ BitVec 64) (_ BitVec 64))) (v_DerPreprocessor_5 (Array (_ BitVec 64) (_ BitVec 64))) (|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_36| (_ BitVec 64))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_36|) (_ bv24 64)))) (and (= v_DerPreprocessor_6 (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_6) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_36| v_DerPreprocessor_5) .cse2 v_DerPreprocessor_6) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_36| v_DerPreprocessor_5) .cse2)) (= .cse2 (select v_DerPreprocessor_5 (_ bv24 64))) (not (= (_ bv0 64) .cse2)))))) is different from true [2022-11-02 21:05:09,196 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 11 not checked. [2022-11-02 21:05:09,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:10,351 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 21:05:10,351 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 124 treesize of output 127 [2022-11-02 21:05:10,362 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 136 treesize of output 128 [2022-11-02 21:05:10,371 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 124 [2022-11-02 21:05:10,525 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 8 treesize of output 4 [2022-11-02 21:05:10,542 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 22 treesize of output 18 [2022-11-02 21:05:10,905 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-02 21:05:10,905 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:05:10,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049738724] [2022-11-02 21:05:10,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049738724] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:05:10,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:05:10,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2022-11-02 21:05:10,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793018282] [2022-11-02 21:05:10,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:05:10,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 21:05:10,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:05:10,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 21:05:10,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=318, Unknown=9, NotChecked=114, Total=506 [2022-11-02 21:05:10,907 INFO L87 Difference]: Start difference. First operand 190 states and 244 transitions. Second operand has 23 states, 20 states have (on average 5.6) internal successors, (112), 20 states have internal predecessors, (112), 10 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-02 21:05:14,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:14,018 INFO L93 Difference]: Finished difference Result 411 states and 575 transitions. [2022-11-02 21:05:14,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-02 21:05:14,019 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 5.6) internal successors, (112), 20 states have internal predecessors, (112), 10 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 86 [2022-11-02 21:05:14,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:14,021 INFO L225 Difference]: With dead ends: 411 [2022-11-02 21:05:14,022 INFO L226 Difference]: Without dead ends: 321 [2022-11-02 21:05:14,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=132, Invalid=619, Unknown=17, NotChecked=162, Total=930 [2022-11-02 21:05:14,024 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 47 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 830 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:14,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 721 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 324 Invalid, 0 Unknown, 830 Unchecked, 1.4s Time] [2022-11-02 21:05:14,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-11-02 21:05:14,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 273. [2022-11-02 21:05:14,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 206 states have (on average 1.174757281553398) internal successors, (242), 211 states have internal predecessors, (242), 40 states have call successors, (40), 22 states have call predecessors, (40), 26 states have return successors, (59), 39 states have call predecessors, (59), 39 states have call successors, (59) [2022-11-02 21:05:14,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 341 transitions. [2022-11-02 21:05:14,093 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 341 transitions. Word has length 86 [2022-11-02 21:05:14,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:14,094 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 341 transitions. [2022-11-02 21:05:14,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 5.6) internal successors, (112), 20 states have internal predecessors, (112), 10 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-02 21:05:14,094 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 341 transitions. [2022-11-02 21:05:14,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-02 21:05:14,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:14,096 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 21:05:14,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:14,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:05:14,318 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:14,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:14,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1613305023, now seen corresponding path program 1 times [2022-11-02 21:05:14,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:05:14,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1042585302] [2022-11-02 21:05:14,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:14,320 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:05:14,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:05:14,320 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:05:14,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-02 21:05:14,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:14,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-02 21:05:14,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:30,969 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 21:05:30,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:53,242 INFO L356 Elim1Store]: treesize reduction 17, result has 82.8 percent of original size [2022-11-02 21:05:53,243 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 21:05:53,785 INFO L356 Elim1Store]: treesize reduction 8, result has 88.1 percent of original size [2022-11-02 21:05:53,786 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 21:06:00,062 INFO L356 Elim1Store]: treesize reduction 17, result has 82.8 percent of original size [2022-11-02 21:06:00,062 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 21:06:00,678 INFO L356 Elim1Store]: treesize reduction 8, result has 88.1 percent of original size [2022-11-02 21:06:00,678 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 21:06:01,920 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 21:06:01,921 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:06:01,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1042585302] [2022-11-02 21:06:01,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1042585302] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:06:01,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:06:01,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 40 [2022-11-02 21:06:01,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145598997] [2022-11-02 21:06:01,921 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:06:01,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-02 21:06:01,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:06:01,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-02 21:06:01,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1417, Unknown=4, NotChecked=0, Total=1560 [2022-11-02 21:06:01,924 INFO L87 Difference]: Start difference. First operand 273 states and 341 transitions. Second operand has 40 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), 10 states have call predecessors, (18), 11 states have call successors, (18) [2022-11-02 21:06:09,854 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 21:06:12,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 21:06:14,658 WARN L539 Checker$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 21:06:36,538 WARN L234 SmtUtils]: Spent 20.56s 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 21:06:41,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 21:06:43,149 WARN L539 Checker$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 21:06:43,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:43,746 INFO L93 Difference]: Finished difference Result 511 states and 666 transitions. [2022-11-02 21:06:43,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-02 21:06:43,747 INFO L78 Accepts]: Start accepts. Automaton has has 40 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), 10 states have call predecessors, (18), 11 states have call successors, (18) Word has length 97 [2022-11-02 21:06:43,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:43,750 INFO L225 Difference]: With dead ends: 511 [2022-11-02 21:06:43,750 INFO L226 Difference]: Without dead ends: 431 [2022-11-02 21:06:43,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 57.8s TimeCoverageRelationStatistics Valid=241, Invalid=2302, Unknown=7, NotChecked=0, Total=2550 [2022-11-02 21:06:43,752 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 147 mSDsluCounter, 1544 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 26 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 1632 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 396 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:43,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 1632 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 534 Invalid, 5 Unknown, 396 Unchecked, 12.8s Time] [2022-11-02 21:06:43,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-11-02 21:06:43,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 371. [2022-11-02 21:06:43,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 284 states have (on average 1.1795774647887325) internal successors, (335), 292 states have internal predecessors, (335), 48 states have call successors, (48), 27 states have call predecessors, (48), 38 states have return successors, (76), 51 states have call predecessors, (76), 47 states have call successors, (76) [2022-11-02 21:06:43,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 459 transitions. [2022-11-02 21:06:43,836 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 459 transitions. Word has length 97 [2022-11-02 21:06:43,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:43,836 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 459 transitions. [2022-11-02 21:06:43,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 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), 10 states have call predecessors, (18), 11 states have call successors, (18) [2022-11-02 21:06:43,837 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 459 transitions. [2022-11-02 21:06:43,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-02 21:06:43,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:43,839 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:06:43,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-02 21:06:44,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:06:44,055 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:44,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:44,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1667697921, now seen corresponding path program 1 times [2022-11-02 21:06:44,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:06:44,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1954101152] [2022-11-02 21:06:44,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:44,056 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:06:44,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:06:44,057 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:06:44,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-02 21:06:44,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:44,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:06:44,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:06:45,640 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 21:06:45,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:06:45,640 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:06:45,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1954101152] [2022-11-02 21:06:45,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1954101152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:45,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:06:45,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-02 21:06:45,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175630385] [2022-11-02 21:06:45,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:45,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 21:06:45,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:06:45,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 21:06:45,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-02 21:06:45,642 INFO L87 Difference]: Start difference. First operand 371 states and 459 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 21:06:46,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:46,574 INFO L93 Difference]: Finished difference Result 623 states and 805 transitions. [2022-11-02 21:06:46,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 21:06:46,575 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 21:06:46,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:46,578 INFO L225 Difference]: With dead ends: 623 [2022-11-02 21:06:46,578 INFO L226 Difference]: Without dead ends: 391 [2022-11-02 21:06:46,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-11-02 21:06:46,580 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 60 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:46,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 578 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 120 Invalid, 0 Unknown, 95 Unchecked, 0.5s Time] [2022-11-02 21:06:46,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-11-02 21:06:46,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 379. [2022-11-02 21:06:46,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 292 states have (on average 1.1712328767123288) internal successors, (342), 300 states have internal predecessors, (342), 48 states have call successors, (48), 27 states have call predecessors, (48), 38 states have return successors, (76), 51 states have call predecessors, (76), 47 states have call successors, (76) [2022-11-02 21:06:46,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 466 transitions. [2022-11-02 21:06:46,670 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 466 transitions. Word has length 97 [2022-11-02 21:06:46,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:46,670 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 466 transitions. [2022-11-02 21:06:46,671 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 21:06:46,671 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 466 transitions. [2022-11-02 21:06:46,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-02 21:06:46,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:46,673 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 21:06:46,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-02 21:06:46,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:06:46,887 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:46,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:46,887 INFO L85 PathProgramCache]: Analyzing trace with hash -2102273479, now seen corresponding path program 1 times [2022-11-02 21:06:46,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:06:46,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [742761950] [2022-11-02 21:06:46,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:46,888 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:06:46,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:06:46,889 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:06:46,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-02 21:06:47,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:47,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 21:06:47,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:06:47,272 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 21:06:47,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:06:47,694 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 21:06:47,695 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:06:47,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [742761950] [2022-11-02 21:06:47,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [742761950] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:06:47,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:06:47,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-02 21:06:47,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971107828] [2022-11-02 21:06:47,695 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:06:47,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 21:06:47,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:06:47,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 21:06:47,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-02 21:06:47,697 INFO L87 Difference]: Start difference. First operand 379 states and 466 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 21:06:48,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:48,283 INFO L93 Difference]: Finished difference Result 744 states and 942 transitions. [2022-11-02 21:06:48,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 21:06:48,284 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 21:06:48,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:48,287 INFO L225 Difference]: With dead ends: 744 [2022-11-02 21:06:48,287 INFO L226 Difference]: Without dead ends: 446 [2022-11-02 21:06:48,288 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 21:06:48,289 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 95 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:48,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 542 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 21:06:48,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-11-02 21:06:48,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 345. [2022-11-02 21:06:48,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 270 states have (on average 1.2) internal successors, (324), 277 states have internal predecessors, (324), 42 states have call successors, (42), 23 states have call predecessors, (42), 32 states have return successors, (65), 44 states have call predecessors, (65), 41 states have call successors, (65) [2022-11-02 21:06:48,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 431 transitions. [2022-11-02 21:06:48,384 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 431 transitions. Word has length 97 [2022-11-02 21:06:48,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:48,385 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 431 transitions. [2022-11-02 21:06:48,385 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 21:06:48,385 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 431 transitions. [2022-11-02 21:06:48,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-02 21:06:48,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:48,387 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 21:06:48,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-02 21:06:48,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:06:48,611 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:48,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:48,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1278423119, now seen corresponding path program 1 times [2022-11-02 21:06:48,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:06:48,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1821961964] [2022-11-02 21:06:48,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:48,613 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:06:48,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:06:48,614 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:06:48,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-02 21:06:48,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:48,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 21:06:48,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:06:49,440 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 21:06:49,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:06:50,159 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-02 21:06:50,159 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 21:06:50,280 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 21:06:50,280 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:06:50,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1821961964] [2022-11-02 21:06:50,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1821961964] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:06:50,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:06:50,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2022-11-02 21:06:50,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457051856] [2022-11-02 21:06:50,281 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:06:50,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 21:06:50,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:06:50,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 21:06:50,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-02 21:06:50,283 INFO L87 Difference]: Start difference. First operand 345 states and 431 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 21:06:51,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:51,336 INFO L93 Difference]: Finished difference Result 595 states and 790 transitions. [2022-11-02 21:06:51,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 21:06:51,337 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 21:06:51,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:51,339 INFO L225 Difference]: With dead ends: 595 [2022-11-02 21:06:51,339 INFO L226 Difference]: Without dead ends: 411 [2022-11-02 21:06:51,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-11-02 21:06:51,341 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 34 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:51,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 714 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 144 Invalid, 0 Unknown, 86 Unchecked, 0.5s Time] [2022-11-02 21:06:51,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-11-02 21:06:51,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 355. [2022-11-02 21:06:51,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 278 states have (on average 1.1942446043165467) internal successors, (332), 285 states have internal predecessors, (332), 42 states have call successors, (42), 23 states have call predecessors, (42), 34 states have return successors, (73), 46 states have call predecessors, (73), 41 states have call successors, (73) [2022-11-02 21:06:51,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 447 transitions. [2022-11-02 21:06:51,434 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 447 transitions. Word has length 94 [2022-11-02 21:06:51,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:51,434 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 447 transitions. [2022-11-02 21:06:51,435 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 21:06:51,435 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 447 transitions. [2022-11-02 21:06:51,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-02 21:06:51,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:51,436 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 21:06:51,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-02 21:06:51,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:06:51,651 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:51,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:51,651 INFO L85 PathProgramCache]: Analyzing trace with hash 797342861, now seen corresponding path program 1 times [2022-11-02 21:06:51,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:06:51,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [657839942] [2022-11-02 21:06:51,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:51,652 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:06:51,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:06:51,653 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:06:51,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-02 21:06:51,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:51,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:06:51,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:06:51,908 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 21:06:51,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:06:51,909 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:06:51,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [657839942] [2022-11-02 21:06:51,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [657839942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:51,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:06:51,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:06:51,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743405572] [2022-11-02 21:06:51,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:51,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:06:51,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:06:51,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:06:51,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:06:51,911 INFO L87 Difference]: Start difference. First operand 355 states and 447 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 21:06:51,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:51,991 INFO L93 Difference]: Finished difference Result 568 states and 742 transitions. [2022-11-02 21:06:51,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:06:51,991 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 21:06:51,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:51,993 INFO L225 Difference]: With dead ends: 568 [2022-11-02 21:06:51,993 INFO L226 Difference]: Without dead ends: 357 [2022-11-02 21:06:51,995 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 21:06:51,995 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 0 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 313 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 21:06:51,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 313 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:06:51,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-11-02 21:06:52,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 352. [2022-11-02 21:06:52,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 273 states have (on average 1.15018315018315) internal successors, (314), 284 states have internal predecessors, (314), 42 states have call successors, (42), 23 states have call predecessors, (42), 36 states have return successors, (73), 44 states have call predecessors, (73), 41 states have call successors, (73) [2022-11-02 21:06:52,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 429 transitions. [2022-11-02 21:06:52,080 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 429 transitions. Word has length 94 [2022-11-02 21:06:52,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:52,080 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 429 transitions. [2022-11-02 21:06:52,080 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 21:06:52,081 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 429 transitions. [2022-11-02 21:06:52,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-02 21:06:52,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:52,083 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 21:06:52,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-02 21:06:52,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:06:52,299 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:52,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:52,299 INFO L85 PathProgramCache]: Analyzing trace with hash 812237695, now seen corresponding path program 2 times [2022-11-02 21:06:52,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:06:52,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956140612] [2022-11-02 21:06:52,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:06:52,300 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:06:52,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:06:52,301 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:06:52,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-02 21:06:52,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:06:52,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:06:52,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-02 21:06:52,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:06:52,667 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-02 21:06:52,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 21:06:54,033 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 21:06:54,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:06:54,033 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:06:54,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956140612] [2022-11-02 21:06:54,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956140612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:54,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:06:54,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-02 21:06:54,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603310995] [2022-11-02 21:06:54,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:54,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 21:06:54,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:06:54,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 21:06:54,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-02 21:06:54,035 INFO L87 Difference]: Start difference. First operand 352 states and 429 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 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 21:06:54,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:54,624 INFO L93 Difference]: Finished difference Result 530 states and 652 transitions. [2022-11-02 21:06:54,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 21:06:54,628 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 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 21:06:54,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:54,630 INFO L225 Difference]: With dead ends: 530 [2022-11-02 21:06:54,630 INFO L226 Difference]: Without dead ends: 440 [2022-11-02 21:06:54,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 77 SyntacticMatches, 8 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-02 21:06:54,632 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 23 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:54,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 725 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 118 Unchecked, 0.3s Time] [2022-11-02 21:06:54,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-11-02 21:06:54,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 413. [2022-11-02 21:06:54,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 321 states have (on average 1.1495327102803738) internal successors, (369), 335 states have internal predecessors, (369), 48 states have call successors, (48), 27 states have call predecessors, (48), 43 states have return successors, (82), 50 states have call predecessors, (82), 47 states have call successors, (82) [2022-11-02 21:06:54,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 499 transitions. [2022-11-02 21:06:54,724 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 499 transitions. Word has length 95 [2022-11-02 21:06:54,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:54,725 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 499 transitions. [2022-11-02 21:06:54,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 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 21:06:54,725 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 499 transitions. [2022-11-02 21:06:54,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-02 21:06:54,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:54,727 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 21:06:54,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-02 21:06:54,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:06:54,946 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:54,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:54,947 INFO L85 PathProgramCache]: Analyzing trace with hash 677376123, now seen corresponding path program 3 times [2022-11-02 21:06:54,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:06:54,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098488480] [2022-11-02 21:06:54,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:06:54,947 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:06:54,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:06:54,948 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:06:54,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-02 21:06:55,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 21:06:55,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:06:55,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 21:06:55,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:06:55,147 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 21:06:55,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:06:55,148 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:06:55,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098488480] [2022-11-02 21:06:55,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098488480] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:55,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:06:55,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:06:55,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133839130] [2022-11-02 21:06:55,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:55,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:06:55,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:06:55,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:06:55,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:06:55,150 INFO L87 Difference]: Start difference. First operand 413 states and 499 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 21:06:55,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:55,292 INFO L93 Difference]: Finished difference Result 555 states and 671 transitions. [2022-11-02 21:06:55,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:06:55,293 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 21:06:55,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:55,295 INFO L225 Difference]: With dead ends: 555 [2022-11-02 21:06:55,295 INFO L226 Difference]: Without dead ends: 408 [2022-11-02 21:06:55,296 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 21:06:55,296 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 2 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:55,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 361 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:06:55,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-11-02 21:06:55,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 404. [2022-11-02 21:06:55,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 312 states have (on average 1.1506410256410255) internal successors, (359), 327 states have internal predecessors, (359), 48 states have call successors, (48), 26 states have call predecessors, (48), 43 states have return successors, (80), 50 states have call predecessors, (80), 47 states have call successors, (80) [2022-11-02 21:06:55,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 487 transitions. [2022-11-02 21:06:55,410 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 487 transitions. Word has length 95 [2022-11-02 21:06:55,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:55,411 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 487 transitions. [2022-11-02 21:06:55,411 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 21:06:55,411 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 487 transitions. [2022-11-02 21:06:55,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-02 21:06:55,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:55,413 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 21:06:55,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-02 21:06:55,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:06:55,629 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:55,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:55,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1355499711, now seen corresponding path program 1 times [2022-11-02 21:06:55,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:06:55,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1105783823] [2022-11-02 21:06:55,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:55,630 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:06:55,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:06:55,632 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:06:55,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-02 21:06:55,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:55,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 21:06:55,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:06:56,092 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 21:06:56,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:06:56,092 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:06:56,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1105783823] [2022-11-02 21:06:56,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1105783823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:06:56,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:06:56,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 21:06:56,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607241641] [2022-11-02 21:06:56,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:06:56,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:06:56,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:06:56,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:06:56,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:06:56,095 INFO L87 Difference]: Start difference. First operand 404 states and 487 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 21:06:56,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:56,685 INFO L93 Difference]: Finished difference Result 673 states and 845 transitions. [2022-11-02 21:06:56,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 21:06:56,686 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 21:06:56,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:56,688 INFO L225 Difference]: With dead ends: 673 [2022-11-02 21:06:56,688 INFO L226 Difference]: Without dead ends: 400 [2022-11-02 21:06:56,689 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 21:06:56,690 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 63 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:56,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 517 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 21:06:56,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-11-02 21:06:56,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 364. [2022-11-02 21:06:56,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 281 states have (on average 1.1174377224199288) internal successors, (314), 290 states have internal predecessors, (314), 46 states have call successors, (46), 26 states have call predecessors, (46), 36 states have return successors, (67), 47 states have call predecessors, (67), 45 states have call successors, (67) [2022-11-02 21:06:56,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 427 transitions. [2022-11-02 21:06:56,777 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 427 transitions. Word has length 99 [2022-11-02 21:06:56,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:56,778 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 427 transitions. [2022-11-02 21:06:56,778 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 21:06:56,778 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 427 transitions. [2022-11-02 21:06:56,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-02 21:06:56,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:56,780 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 21:06:56,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-02 21:06:56,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:06:56,995 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:56,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:56,995 INFO L85 PathProgramCache]: Analyzing trace with hash -647528546, now seen corresponding path program 1 times [2022-11-02 21:06:56,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:06:56,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [263916688] [2022-11-02 21:06:56,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:56,996 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:06:56,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:06:56,997 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:06:56,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f5d7846-3a78-49b0-b00b-b54b00b1ad69/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-02 21:06:57,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:57,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-02 21:06:57,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:07:38,326 WARN L234 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 21:07:44,909 WARN L234 SmtUtils]: Spent 6.30s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)