./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/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_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/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_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/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 b8488bc4b38d88c79bc520e9824284003ed2f71ce856a53cf11e7fc61dbeef4b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:54:46,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:54:46,743 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:54:46,772 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:54:46,773 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:54:46,774 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:54:46,775 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:54:46,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:54:46,778 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:54:46,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:54:46,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:54:46,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:54:46,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:54:46,783 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:54:46,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:54:46,785 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:54:46,786 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:54:46,787 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:54:46,788 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:54:46,790 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:54:46,792 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:54:46,793 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:54:46,794 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:54:46,795 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:54:46,798 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:54:46,799 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:54:46,799 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:54:46,800 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:54:46,801 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:54:46,801 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:54:46,802 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:54:46,803 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:54:46,803 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:54:46,804 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:54:46,805 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:54:46,806 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:54:46,806 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:54:46,807 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:54:46,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:54:46,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:54:46,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:54:46,810 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-02 20:54:46,832 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:54:46,832 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:54:46,833 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:54:46,833 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:54:46,834 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:54:46,834 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:54:46,835 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:54:46,835 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:54:46,835 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:54:46,835 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:54:46,836 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:54:46,836 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:54:46,836 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:54:46,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:54:46,837 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:54:46,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:54:46,837 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:54:46,837 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:54:46,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:54:46,838 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:54:46,838 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:54:46,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:54:46,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:54:46,839 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:54:46,839 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:54:46,839 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:54:46,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:54:46,839 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:54:46,840 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:54:46,840 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:54:46,840 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_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8488bc4b38d88c79bc520e9824284003ed2f71ce856a53cf11e7fc61dbeef4b [2022-11-02 20:54:47,136 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:54:47,166 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:54:47,169 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:54:47,170 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:54:47,171 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:54:47,172 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2022-11-02 20:54:47,268 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/data/a222b35c1/8e6ea98a372b46bfa7a6722330788f91/FLAGd5e16c06f [2022-11-02 20:54:48,168 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:54:48,169 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2022-11-02 20:54:48,209 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/data/a222b35c1/8e6ea98a372b46bfa7a6722330788f91/FLAGd5e16c06f [2022-11-02 20:54:48,659 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/data/a222b35c1/8e6ea98a372b46bfa7a6722330788f91 [2022-11-02 20:54:48,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:54:48,663 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:54:48,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:54:48,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:54:48,669 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:54:48,670 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:54:48" (1/1) ... [2022-11-02 20:54:48,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ec5c3b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:48, skipping insertion in model container [2022-11-02 20:54:48,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:54:48" (1/1) ... [2022-11-02 20:54:48,679 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:54:48,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:54:49,109 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_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4495,4508] [2022-11-02 20:54:49,117 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_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4555,4568] [2022-11-02 20:54:49,884 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:54:49,900 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:54:49,901 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:54:49,901 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:54:49,903 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:54:49,914 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:54:49,918 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:54:49,924 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:54:49,927 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:54:49,931 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:54:49,931 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:54:49,932 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:54:49,932 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:54:50,222 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-02 20:54:50,225 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-02 20:54:50,226 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-02 20:54:50,229 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-02 20:54:50,230 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-02 20:54:50,231 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-02 20:54:50,232 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-02 20:54:50,232 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-02 20:54:50,233 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-02 20:54:50,234 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-02 20:54:50,367 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-02 20:54:50,390 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:54:50,405 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:54:50,418 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_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4495,4508] [2022-11-02 20:54:50,419 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_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4555,4568] [2022-11-02 20:54:50,455 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:54:50,455 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:54:50,456 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:54:50,456 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:54:50,457 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:54:50,465 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:54:50,466 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:54:50,467 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:54:50,468 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:54:50,469 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:54:50,469 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:54:50,470 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:54:50,470 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:54:50,506 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-02 20:54:50,507 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-02 20:54:50,508 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-02 20:54:50,508 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-02 20:54:50,509 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-02 20:54:50,510 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-02 20:54:50,511 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-02 20:54:50,511 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-02 20:54:50,512 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-02 20:54:50,512 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-02 20:54:50,535 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-02 20:54:50,551 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:54:50,875 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:54:50,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:50 WrapperNode [2022-11-02 20:54:50,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:54:50,877 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:54:50,877 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:54:50,877 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:54:50,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:50" (1/1) ... [2022-11-02 20:54:50,997 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:50" (1/1) ... [2022-11-02 20:54:51,032 INFO L138 Inliner]: procedures = 679, calls = 1041, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 142 [2022-11-02 20:54:51,033 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:54:51,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:54:51,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:54:51,034 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:54:51,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:50" (1/1) ... [2022-11-02 20:54:51,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:50" (1/1) ... [2022-11-02 20:54:51,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:50" (1/1) ... [2022-11-02 20:54:51,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:50" (1/1) ... [2022-11-02 20:54:51,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:50" (1/1) ... [2022-11-02 20:54:51,086 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:50" (1/1) ... [2022-11-02 20:54:51,090 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:50" (1/1) ... [2022-11-02 20:54:51,092 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:50" (1/1) ... [2022-11-02 20:54:51,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:54:51,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:54:51,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:54:51,104 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:54:51,105 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:50" (1/1) ... [2022-11-02 20:54:51,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:54:51,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:51,139 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:54:51,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:54:51,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:54:51,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-02 20:54:51,193 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-02 20:54:51,194 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-02 20:54:51,194 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-02 20:54:51,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:54:51,194 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-02 20:54:51,196 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-02 20:54:51,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:54:51,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-02 20:54:51,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:54:51,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:54:51,198 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-02 20:54:51,198 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-02 20:54:51,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:54:51,199 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 20:54:51,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-02 20:54:51,200 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-02 20:54:51,200 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-02 20:54:51,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:54:51,519 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:54:51,521 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:54:51,892 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:54:51,902 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:54:51,902 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 20:54:51,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:54:51 BoogieIcfgContainer [2022-11-02 20:54:51,905 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:54:51,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:54:51,909 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:54:51,913 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:54:51,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:54:48" (1/3) ... [2022-11-02 20:54:51,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b8ff218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:54:51, skipping insertion in model container [2022-11-02 20:54:51,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:54:50" (2/3) ... [2022-11-02 20:54:51,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b8ff218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:54:51, skipping insertion in model container [2022-11-02 20:54:51,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:54:51" (3/3) ... [2022-11-02 20:54:51,926 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_begin_harness.i [2022-11-02 20:54:51,954 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:54:51,955 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:54:52,022 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:54:52,038 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;@346489f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:54:52,039 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:54:52,043 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 49 states have (on average 1.346938775510204) internal successors, (66), 50 states have internal predecessors, (66), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-02 20:54:52,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-02 20:54:52,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:52,055 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 20:54:52,056 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:54:52,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:52,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1062572114, now seen corresponding path program 1 times [2022-11-02 20:54:52,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:52,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409272251] [2022-11-02 20:54:52,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:52,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:52,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:52,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:54:52,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:52,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:54:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:52,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:54:52,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:52,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-02 20:54:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:52,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-02 20:54:52,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:52,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-02 20:54:52,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:52,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-02 20:54:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:52,643 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 20:54:52,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:52,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409272251] [2022-11-02 20:54:52,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409272251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:52,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:54:52,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:54:52,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201186705] [2022-11-02 20:54:52,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:52,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:54:52,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:52,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:54:52,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:54:52,691 INFO L87 Difference]: Start difference. First operand has 69 states, 49 states have (on average 1.346938775510204) internal successors, (66), 50 states have internal predecessors, (66), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 20:54:52,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:52,739 INFO L93 Difference]: Finished difference Result 130 states and 186 transitions. [2022-11-02 20:54:52,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:54:52,742 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 20:54:52,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:52,751 INFO L225 Difference]: With dead ends: 130 [2022-11-02 20:54:52,751 INFO L226 Difference]: Without dead ends: 64 [2022-11-02 20:54:52,754 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 20:54:52,757 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:52,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:54:52,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-02 20:54:52,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-11-02 20:54:52,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 45 states have (on average 1.288888888888889) internal successors, (58), 46 states have internal predecessors, (58), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-02 20:54:52,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2022-11-02 20:54:52,815 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 68 [2022-11-02 20:54:52,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:52,815 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2022-11-02 20:54:52,815 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 20:54:52,816 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2022-11-02 20:54:52,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-02 20:54:52,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:52,818 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 20:54:52,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:54:52,819 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:54:52,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:52,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1946087212, now seen corresponding path program 1 times [2022-11-02 20:54:52,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:52,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848711522] [2022-11-02 20:54:52,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:52,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:52,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:53,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:54:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:53,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:54:53,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:53,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:54:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:53,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-02 20:54:53,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:53,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-02 20:54:53,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:53,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-02 20:54:53,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:53,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-02 20:54:53,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:53,429 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 20:54:53,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:53,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848711522] [2022-11-02 20:54:53,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848711522] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:53,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365089947] [2022-11-02 20:54:53,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:53,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:53,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:53,438 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:53,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:54:53,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:53,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-02 20:54:53,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:53,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 20:54:53,879 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 20:54:53,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:54:53,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:54:53,975 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 20:54:53,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:54:53,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:54:53,986 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 20:54:54,417 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 20:54:54,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:54:54,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365089947] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:54,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:54:54,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2022-11-02 20:54:54,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371799672] [2022-11-02 20:54:54,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:54,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:54:54,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:54,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:54:54,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:54:54,423 INFO L87 Difference]: Start difference. First operand 64 states and 83 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 20:54:54,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:54,492 INFO L93 Difference]: Finished difference Result 132 states and 175 transitions. [2022-11-02 20:54:54,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:54:54,493 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 20:54:54,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:54,497 INFO L225 Difference]: With dead ends: 132 [2022-11-02 20:54:54,498 INFO L226 Difference]: Without dead ends: 80 [2022-11-02 20:54:54,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:54:54,505 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 16 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:54,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 362 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 54 Unchecked, 0.0s Time] [2022-11-02 20:54:54,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-02 20:54:54,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-02 20:54:54,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 61 states have internal predecessors, (78), 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 20:54:54,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 106 transitions. [2022-11-02 20:54:54,528 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 106 transitions. Word has length 68 [2022-11-02 20:54:54,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:54,529 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 106 transitions. [2022-11-02 20:54:54,531 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 20:54:54,532 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 106 transitions. [2022-11-02 20:54:54,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-02 20:54:54,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:54,543 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 20:54:54,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:54,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:54,759 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:54:54,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:54,759 INFO L85 PathProgramCache]: Analyzing trace with hash -103300630, now seen corresponding path program 1 times [2022-11-02 20:54:54,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:54,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245784396] [2022-11-02 20:54:54,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:54,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:55,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:54:55,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:55,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:54:55,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:55,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:54:55,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:55,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-02 20:54:55,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:55,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-02 20:54:55,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:55,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-02 20:54:55,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:55,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-02 20:54:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:55,177 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 20:54:55,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:55,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245784396] [2022-11-02 20:54:55,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245784396] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:55,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607443199] [2022-11-02 20:54:55,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:55,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:55,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:55,179 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:55,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:54:55,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:55,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-02 20:54:55,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:55,520 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-02 20:54:55,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-11-02 20:54:55,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-02 20:54:55,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-02 20:54:55,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:54:55,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2022-11-02 20:54:55,606 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 13 treesize of output 9 [2022-11-02 20:54:56,040 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 20:54:56,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:54:56,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607443199] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:54:56,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:54:56,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2022-11-02 20:54:56,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124880632] [2022-11-02 20:54:56,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:54:56,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:54:56,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:56,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:54:56,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:54:56,042 INFO L87 Difference]: Start difference. First operand 80 states and 106 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 20:54:56,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:54:56,392 INFO L93 Difference]: Finished difference Result 162 states and 220 transitions. [2022-11-02 20:54:56,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:54:56,392 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 20:54:56,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:54:56,395 INFO L225 Difference]: With dead ends: 162 [2022-11-02 20:54:56,395 INFO L226 Difference]: Without dead ends: 110 [2022-11-02 20:54:56,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:54:56,397 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 101 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:54:56,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 385 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 73 Invalid, 0 Unknown, 137 Unchecked, 0.2s Time] [2022-11-02 20:54:56,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-02 20:54:56,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2022-11-02 20:54:56,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 63 states have internal predecessors, (81), 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 20:54:56,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 109 transitions. [2022-11-02 20:54:56,413 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 109 transitions. Word has length 68 [2022-11-02 20:54:56,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:54:56,414 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 109 transitions. [2022-11-02 20:54:56,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 20:54:56,414 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 109 transitions. [2022-11-02 20:54:56,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-02 20:54:56,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:54:56,416 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] [2022-11-02 20:54:56,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:54:56,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:56,643 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:54:56,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:54:56,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1824972072, now seen corresponding path program 1 times [2022-11-02 20:54:56,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:54:56,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997432222] [2022-11-02 20:54:56,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:56,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:54:56,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:56,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:54:56,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:56,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:54:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:56,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:54:56,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:56,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-02 20:54:56,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:56,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-02 20:54:56,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:57,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-02 20:54:57,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:57,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-02 20:54:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:57,024 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 20:54:57,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:54:57,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997432222] [2022-11-02 20:54:57,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997432222] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:54:57,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126557444] [2022-11-02 20:54:57,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:54:57,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:54:57,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:54:57,026 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:54:57,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:54:57,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:54:57,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-02 20:54:57,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:54:57,292 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:54:57,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-02 20:54:57,308 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:54:57,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-02 20:54:58,223 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:54:58,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:54:58,911 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 20:54:58,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126557444] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:54:58,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:54:58,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 12] total 28 [2022-11-02 20:54:58,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174031128] [2022-11-02 20:54:58,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:54:58,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:54:58,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:54:58,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:54:58,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:54:58,915 INFO L87 Difference]: Start difference. First operand 82 states and 109 transitions. Second operand has 28 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 9 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2022-11-02 20:55:01,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:01,207 INFO L93 Difference]: Finished difference Result 226 states and 351 transitions. [2022-11-02 20:55:01,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-02 20:55:01,208 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 9 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 68 [2022-11-02 20:55:01,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:01,210 INFO L225 Difference]: With dead ends: 226 [2022-11-02 20:55:01,210 INFO L226 Difference]: Without dead ends: 166 [2022-11-02 20:55:01,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=354, Invalid=2508, Unknown=0, NotChecked=0, Total=2862 [2022-11-02 20:55:01,213 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 194 mSDsluCounter, 1505 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 1616 SdHoareTripleChecker+Invalid, 1784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 405 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:01,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 1616 Invalid, 1784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1212 Invalid, 0 Unknown, 405 Unchecked, 1.2s Time] [2022-11-02 20:55:01,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-02 20:55:01,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 144. [2022-11-02 20:55:01,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 106 states have (on average 1.3396226415094339) internal successors, (142), 111 states have internal predecessors, (142), 26 states have call successors, (26), 8 states have call predecessors, (26), 11 states have return successors, (56), 24 states have call predecessors, (56), 25 states have call successors, (56) [2022-11-02 20:55:01,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 224 transitions. [2022-11-02 20:55:01,244 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 224 transitions. Word has length 68 [2022-11-02 20:55:01,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:01,244 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 224 transitions. [2022-11-02 20:55:01,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 9 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2022-11-02 20:55:01,245 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 224 transitions. [2022-11-02 20:55:01,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-02 20:55:01,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:01,247 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 20:55:01,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:01,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:01,474 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:01,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:01,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1195332088, now seen corresponding path program 1 times [2022-11-02 20:55:01,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:01,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142025004] [2022-11-02 20:55:01,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:01,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:01,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:55:01,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:01,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:55:01,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:01,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:55:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:01,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-02 20:55:01,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:01,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-02 20:55:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:01,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-02 20:55:01,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:01,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-02 20:55:01,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:01,828 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 20:55:01,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:01,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142025004] [2022-11-02 20:55:01,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142025004] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:01,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117849302] [2022-11-02 20:55:01,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:01,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:01,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:01,831 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:55:01,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:55:02,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:02,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:55:02,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:02,093 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 20:55:02,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:55:02,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117849302] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:02,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:55:02,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2022-11-02 20:55:02,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685518004] [2022-11-02 20:55:02,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:02,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:55:02,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:02,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:55:02,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:55:02,099 INFO L87 Difference]: Start difference. First operand 144 states and 224 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 20:55:02,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:02,309 INFO L93 Difference]: Finished difference Result 262 states and 426 transitions. [2022-11-02 20:55:02,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:55:02,309 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 20:55:02,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:02,311 INFO L225 Difference]: With dead ends: 262 [2022-11-02 20:55:02,311 INFO L226 Difference]: Without dead ends: 153 [2022-11-02 20:55:02,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:55:02,313 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 107 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:02,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 243 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:55:02,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-02 20:55:02,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-11-02 20:55:02,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 112 states have (on average 1.3214285714285714) internal successors, (148), 120 states have internal predecessors, (148), 26 states have call successors, (26), 8 states have call predecessors, (26), 14 states have return successors, (68), 24 states have call predecessors, (68), 25 states have call successors, (68) [2022-11-02 20:55:02,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 242 transitions. [2022-11-02 20:55:02,343 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 242 transitions. Word has length 70 [2022-11-02 20:55:02,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:02,343 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 242 transitions. [2022-11-02 20:55:02,344 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 20:55:02,344 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 242 transitions. [2022-11-02 20:55:02,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-02 20:55:02,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:02,346 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 20:55:02,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:02,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:02,570 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:02,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:02,571 INFO L85 PathProgramCache]: Analyzing trace with hash -316025515, now seen corresponding path program 1 times [2022-11-02 20:55:02,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:02,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020961632] [2022-11-02 20:55:02,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:02,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:02,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:55:02,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:02,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:55:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:02,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:55:02,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:02,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-02 20:55:02,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:02,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-02 20:55:02,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:02,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-02 20:55:02,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:02,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-02 20:55:02,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:02,854 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 20:55:02,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:02,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020961632] [2022-11-02 20:55:02,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020961632] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:02,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897750540] [2022-11-02 20:55:02,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:02,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:02,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:02,856 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:55:02,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:55:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:03,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:55:03,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:03,114 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 20:55:03,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:55:03,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897750540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:03,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:55:03,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2022-11-02 20:55:03,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813449124] [2022-11-02 20:55:03,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:03,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:55:03,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:03,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:55:03,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:55:03,117 INFO L87 Difference]: Start difference. First operand 153 states and 242 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 20:55:03,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:03,393 INFO L93 Difference]: Finished difference Result 307 states and 521 transitions. [2022-11-02 20:55:03,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:55:03,393 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 20:55:03,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:03,396 INFO L225 Difference]: With dead ends: 307 [2022-11-02 20:55:03,396 INFO L226 Difference]: Without dead ends: 189 [2022-11-02 20:55:03,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:55:03,398 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 144 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:03,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 284 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:55:03,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-02 20:55:03,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 159. [2022-11-02 20:55:03,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 118 states have (on average 1.3305084745762712) internal successors, (157), 126 states have internal predecessors, (157), 26 states have call successors, (26), 8 states have call predecessors, (26), 14 states have return successors, (68), 24 states have call predecessors, (68), 25 states have call successors, (68) [2022-11-02 20:55:03,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 251 transitions. [2022-11-02 20:55:03,450 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 251 transitions. Word has length 72 [2022-11-02 20:55:03,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:03,453 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 251 transitions. [2022-11-02 20:55:03,453 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 20:55:03,453 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 251 transitions. [2022-11-02 20:55:03,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-02 20:55:03,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:03,458 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 20:55:03,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-02 20:55:03,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:03,663 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:03,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:03,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1928092350, now seen corresponding path program 1 times [2022-11-02 20:55:03,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:03,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321356023] [2022-11-02 20:55:03,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:03,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:03,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:03,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:55:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:03,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:55:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:03,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:55:03,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:03,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-02 20:55:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:03,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-02 20:55:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:03,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-02 20:55:03,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:03,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-02 20:55:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:03,968 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 20:55:03,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:03,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321356023] [2022-11-02 20:55:03,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321356023] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:03,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431773671] [2022-11-02 20:55:03,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:03,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:03,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:03,970 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:55:03,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:55:04,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:04,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:55:04,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:04,170 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 20:55:04,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:55:04,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431773671] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:04,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:55:04,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-02 20:55:04,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489113258] [2022-11-02 20:55:04,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:04,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:55:04,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:04,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:55:04,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:55:04,173 INFO L87 Difference]: Start difference. First operand 159 states and 251 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 20:55:04,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:04,228 INFO L93 Difference]: Finished difference Result 310 states and 539 transitions. [2022-11-02 20:55:04,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:55:04,229 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 20:55:04,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:04,231 INFO L225 Difference]: With dead ends: 310 [2022-11-02 20:55:04,232 INFO L226 Difference]: Without dead ends: 186 [2022-11-02 20:55:04,233 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 20:55:04,234 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 6 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:04,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 162 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:55:04,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-11-02 20:55:04,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 162. [2022-11-02 20:55:04,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 121 states have (on average 1.322314049586777) internal successors, (160), 129 states have internal predecessors, (160), 26 states have call successors, (26), 8 states have call predecessors, (26), 14 states have return successors, (68), 24 states have call predecessors, (68), 25 states have call successors, (68) [2022-11-02 20:55:04,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 254 transitions. [2022-11-02 20:55:04,275 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 254 transitions. Word has length 73 [2022-11-02 20:55:04,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:04,275 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 254 transitions. [2022-11-02 20:55:04,276 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 20:55:04,276 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 254 transitions. [2022-11-02 20:55:04,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-02 20:55:04,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:04,277 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 20:55:04,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:04,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-02 20:55:04,490 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:04,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:04,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1085947066, now seen corresponding path program 1 times [2022-11-02 20:55:04,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:04,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47198768] [2022-11-02 20:55:04,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:04,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:04,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:04,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:55:04,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:04,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:55:04,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:04,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-02 20:55:04,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:04,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 20:55:04,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:04,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 20:55:04,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:04,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-02 20:55:04,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:04,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-02 20:55:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:04,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-02 20:55:04,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:04,940 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 20:55:04,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:04,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47198768] [2022-11-02 20:55:04,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47198768] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:04,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787416017] [2022-11-02 20:55:04,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:04,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:04,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:04,942 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:55:04,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:55:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:05,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-02 20:55:05,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:05,234 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 20:55:05,247 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 20:55:05,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:55:05,302 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-11-02 20:55:05,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:55:05,307 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 23 treesize of output 23 [2022-11-02 20:55:05,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:55:05,320 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-11-02 20:55:05,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:55:05,328 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 23 treesize of output 23 [2022-11-02 20:55:05,476 INFO L356 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-11-02 20:55:05,477 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-11-02 20:55:05,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:05,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-02 20:55:05,678 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_31| input size 60 context size 60 output size 60 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:124) 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 20:55:05,682 INFO L158 Benchmark]: Toolchain (without parser) took 17019.44ms. Allocated memory was 127.9MB in the beginning and 268.4MB in the end (delta: 140.5MB). Free memory was 86.1MB in the beginning and 163.5MB in the end (delta: -77.4MB). Peak memory consumption was 63.9MB. Max. memory is 16.1GB. [2022-11-02 20:55:05,683 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 88.1MB. Free memory was 58.5MB in the beginning and 58.5MB in the end (delta: 29.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:55:05,683 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2211.13ms. Allocated memory was 127.9MB in the beginning and 184.5MB in the end (delta: 56.6MB). Free memory was 85.9MB in the beginning and 138.6MB in the end (delta: -52.7MB). Peak memory consumption was 62.8MB. Max. memory is 16.1GB. [2022-11-02 20:55:05,683 INFO L158 Benchmark]: Boogie Procedure Inliner took 156.49ms. Allocated memory is still 184.5MB. Free memory was 138.6MB in the beginning and 133.0MB in the end (delta: 5.5MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-02 20:55:05,683 INFO L158 Benchmark]: Boogie Preprocessor took 68.45ms. Allocated memory is still 184.5MB. Free memory was 133.0MB in the beginning and 130.2MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-02 20:55:05,684 INFO L158 Benchmark]: RCFGBuilder took 802.78ms. Allocated memory is still 184.5MB. Free memory was 130.2MB in the beginning and 106.0MB in the end (delta: 24.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2022-11-02 20:55:05,684 INFO L158 Benchmark]: TraceAbstraction took 13774.19ms. Allocated memory was 184.5MB in the beginning and 268.4MB in the end (delta: 83.9MB). Free memory was 105.0MB in the beginning and 163.5MB in the end (delta: -58.5MB). Peak memory consumption was 26.3MB. Max. memory is 16.1GB. [2022-11-02 20:55:05,685 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 88.1MB. Free memory was 58.5MB in the beginning and 58.5MB in the end (delta: 29.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2211.13ms. Allocated memory was 127.9MB in the beginning and 184.5MB in the end (delta: 56.6MB). Free memory was 85.9MB in the beginning and 138.6MB in the end (delta: -52.7MB). Peak memory consumption was 62.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 156.49ms. Allocated memory is still 184.5MB. Free memory was 138.6MB in the beginning and 133.0MB in the end (delta: 5.5MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 68.45ms. Allocated memory is still 184.5MB. Free memory was 133.0MB in the beginning and 130.2MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 802.78ms. Allocated memory is still 184.5MB. Free memory was 130.2MB in the beginning and 106.0MB in the end (delta: 24.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 13774.19ms. Allocated memory was 184.5MB in the beginning and 268.4MB in the end (delta: 83.9MB). Free memory was 105.0MB in the beginning and 163.5MB in the end (delta: -58.5MB). Peak memory consumption was 26.3MB. 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_31| input size 60 context size 60 output size 60 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: var is still there: |v_#memory_$Pointer$.base_31| input size 60 context size 60 output size 60: 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 20:55:05,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/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_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/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_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/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 b8488bc4b38d88c79bc520e9824284003ed2f71ce856a53cf11e7fc61dbeef4b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:55:08,117 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:55:08,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:55:08,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:55:08,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:55:08,166 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:55:08,168 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:55:08,175 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:55:08,182 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:55:08,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:55:08,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:55:08,191 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:55:08,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:55:08,194 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:55:08,197 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:55:08,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:55:08,200 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:55:08,201 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:55:08,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:55:08,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:55:08,214 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:55:08,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:55:08,218 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:55:08,221 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:55:08,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:55:08,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:55:08,230 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:55:08,232 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:55:08,233 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:55:08,234 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:55:08,235 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:55:08,236 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:55:08,238 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:55:08,239 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:55:08,240 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:55:08,240 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:55:08,241 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:55:08,241 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:55:08,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:55:08,244 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:55:08,245 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:55:08,250 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-11-02 20:55:08,290 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:55:08,290 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:55:08,292 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:55:08,292 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:55:08,293 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:55:08,293 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:55:08,295 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:55:08,295 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:55:08,296 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:55:08,296 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:55:08,297 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:55:08,297 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:55:08,298 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:55:08,298 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:55:08,298 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 20:55:08,299 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-02 20:55:08,299 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-02 20:55:08,299 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:55:08,299 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:55:08,300 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:55:08,300 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:55:08,300 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:55:08,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:55:08,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:55:08,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:55:08,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:55:08,302 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:55:08,302 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-02 20:55:08,303 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-02 20:55:08,303 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:55:08,303 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:55:08,303 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:55:08,304 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-02 20:55:08,304 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_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8488bc4b38d88c79bc520e9824284003ed2f71ce856a53cf11e7fc61dbeef4b [2022-11-02 20:55:08,706 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:55:08,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:55:08,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:55:08,732 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:55:08,733 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:55:08,734 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2022-11-02 20:55:08,797 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/data/44569064d/a45ca58c339841529cfdb042baf96d8c/FLAGd71d11aa9 [2022-11-02 20:55:09,613 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:55:09,614 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2022-11-02 20:55:09,656 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/data/44569064d/a45ca58c339841529cfdb042baf96d8c/FLAGd71d11aa9 [2022-11-02 20:55:09,703 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/data/44569064d/a45ca58c339841529cfdb042baf96d8c [2022-11-02 20:55:09,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:55:09,709 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:55:09,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:55:09,732 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:55:09,736 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:55:09,737 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:55:09" (1/1) ... [2022-11-02 20:55:09,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@123e9685 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:09, skipping insertion in model container [2022-11-02 20:55:09,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:55:09" (1/1) ... [2022-11-02 20:55:09,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:55:09,877 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:55:10,201 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_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4495,4508] [2022-11-02 20:55:10,207 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_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4555,4568] [2022-11-02 20:55:11,063 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:11,064 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:11,065 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:11,066 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:11,067 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:11,083 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:11,084 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:11,086 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:11,087 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:11,089 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:11,091 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:11,092 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:11,098 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:11,429 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-02 20:55:11,430 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-02 20:55:11,432 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-02 20:55:11,433 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-02 20:55:11,434 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-02 20:55:11,435 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-02 20:55:11,436 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-02 20:55:11,437 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-02 20:55:11,437 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-02 20:55:11,438 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-02 20:55:11,604 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-02 20:55:11,630 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:55:11,653 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-02 20:55:11,703 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:55:11,709 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_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4495,4508] [2022-11-02 20:55:11,711 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_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4555,4568] [2022-11-02 20:55:11,796 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:11,798 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:11,812 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:11,813 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:11,814 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:11,821 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:11,822 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:11,823 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:11,830 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:11,832 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:11,833 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:11,833 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:11,833 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:11,895 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-02 20:55:11,897 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-02 20:55:11,897 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-02 20:55:11,900 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-02 20:55:11,906 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-02 20:55:11,908 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-02 20:55:11,908 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-02 20:55:11,909 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-02 20:55:11,910 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-02 20:55:11,910 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-02 20:55:11,948 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-02 20:55:11,963 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:55:11,981 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:55:12,008 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_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4495,4508] [2022-11-02 20:55:12,014 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_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4555,4568] [2022-11-02 20:55:12,065 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:12,065 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:12,066 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:12,066 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:12,067 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:12,078 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:12,078 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:12,079 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:12,080 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:12,081 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:12,082 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:12,082 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:12,082 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:55:12,124 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-02 20:55:12,124 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-02 20:55:12,125 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-02 20:55:12,126 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-02 20:55:12,128 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-02 20:55:12,128 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-02 20:55:12,129 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-02 20:55:12,129 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-02 20:55:12,129 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-02 20:55:12,130 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-02 20:55:12,166 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-02 20:55:12,221 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:55:12,464 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:55:12,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:12 WrapperNode [2022-11-02 20:55:12,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:55:12,466 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:55:12,466 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:55:12,467 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:55:12,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:12" (1/1) ... [2022-11-02 20:55:12,532 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:12" (1/1) ... [2022-11-02 20:55:12,585 INFO L138 Inliner]: procedures = 698, calls = 1041, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 143 [2022-11-02 20:55:12,585 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:55:12,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:55:12,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:55:12,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:55:12,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:12" (1/1) ... [2022-11-02 20:55:12,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:12" (1/1) ... [2022-11-02 20:55:12,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:12" (1/1) ... [2022-11-02 20:55:12,601 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:12" (1/1) ... [2022-11-02 20:55:12,614 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:12" (1/1) ... [2022-11-02 20:55:12,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:12" (1/1) ... [2022-11-02 20:55:12,639 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:12" (1/1) ... [2022-11-02 20:55:12,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:12" (1/1) ... [2022-11-02 20:55:12,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:55:12,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:55:12,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:55:12,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:55:12,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:12" (1/1) ... [2022-11-02 20:55:12,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:55:12,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:12,684 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:55:12,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:55:12,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:55:12,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-02 20:55:12,732 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-02 20:55:12,732 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-02 20:55:12,732 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-02 20:55:12,733 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-02 20:55:12,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:55:12,734 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-02 20:55:12,734 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-02 20:55:12,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:55:12,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-02 20:55:12,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:55:12,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:55:12,736 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-02 20:55:12,736 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-02 20:55:12,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:55:12,736 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 20:55:12,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-02 20:55:12,736 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-02 20:55:12,737 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-02 20:55:13,084 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:55:13,086 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:55:13,473 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:55:13,480 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:55:13,480 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 20:55:13,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:55:13 BoogieIcfgContainer [2022-11-02 20:55:13,483 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:55:13,486 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:55:13,486 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:55:13,489 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:55:13,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:55:09" (1/3) ... [2022-11-02 20:55:13,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@616b63f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:55:13, skipping insertion in model container [2022-11-02 20:55:13,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:12" (2/3) ... [2022-11-02 20:55:13,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@616b63f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:55:13, skipping insertion in model container [2022-11-02 20:55:13,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:55:13" (3/3) ... [2022-11-02 20:55:13,492 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_begin_harness.i [2022-11-02 20:55:13,513 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:55:13,513 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:55:13,575 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:55:13,580 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;@37d3411b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:55:13,580 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:55:13,587 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 49 states have (on average 1.346938775510204) internal successors, (66), 50 states have internal predecessors, (66), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-02 20:55:13,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-02 20:55:13,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:13,599 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 20:55:13,600 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:13,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:13,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1062572114, now seen corresponding path program 1 times [2022-11-02 20:55:13,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:13,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232163468] [2022-11-02 20:55:13,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:13,619 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:13,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:13,623 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:13,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-02 20:55:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:13,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-02 20:55:13,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:14,056 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 20:55:14,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:55:14,059 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:14,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232163468] [2022-11-02 20:55:14,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232163468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:14,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:14,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:55:14,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896771721] [2022-11-02 20:55:14,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:14,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:55:14,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:14,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:55:14,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:55:14,110 INFO L87 Difference]: Start difference. First operand has 69 states, 49 states have (on average 1.346938775510204) internal successors, (66), 50 states have internal predecessors, (66), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 20:55:14,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:14,161 INFO L93 Difference]: Finished difference Result 130 states and 186 transitions. [2022-11-02 20:55:14,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:55:14,163 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 20:55:14,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:14,174 INFO L225 Difference]: With dead ends: 130 [2022-11-02 20:55:14,175 INFO L226 Difference]: Without dead ends: 64 [2022-11-02 20:55:14,184 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 20:55:14,189 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:14,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:55:14,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-02 20:55:14,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-11-02 20:55:14,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 45 states have (on average 1.288888888888889) internal successors, (58), 46 states have internal predecessors, (58), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-02 20:55:14,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2022-11-02 20:55:14,252 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 68 [2022-11-02 20:55:14,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:14,254 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2022-11-02 20:55:14,254 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 20:55:14,255 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2022-11-02 20:55:14,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-02 20:55:14,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:14,262 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 20:55:14,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:14,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:14,480 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:14,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:14,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1946087212, now seen corresponding path program 1 times [2022-11-02 20:55:14,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:14,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [230538268] [2022-11-02 20:55:14,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:14,483 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:14,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:14,486 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:14,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-02 20:55:14,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:14,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:55:14,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:14,916 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 20:55:14,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:55:14,920 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:14,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [230538268] [2022-11-02 20:55:14,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [230538268] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:14,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:14,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:55:14,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127018331] [2022-11-02 20:55:14,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:14,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:55:14,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:14,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:55:14,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:55:14,925 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 20:55:15,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:15,014 INFO L93 Difference]: Finished difference Result 116 states and 154 transitions. [2022-11-02 20:55:15,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:55:15,015 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 20:55:15,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:15,018 INFO L225 Difference]: With dead ends: 116 [2022-11-02 20:55:15,018 INFO L226 Difference]: Without dead ends: 66 [2022-11-02 20:55:15,019 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 20:55:15,020 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 2 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:15,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 375 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:55:15,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-02 20:55:15,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-11-02 20:55:15,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 48 states have internal predecessors, (59), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2022-11-02 20:55:15,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 87 transitions. [2022-11-02 20:55:15,032 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 87 transitions. Word has length 68 [2022-11-02 20:55:15,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:15,033 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 87 transitions. [2022-11-02 20:55:15,033 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 20:55:15,033 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 87 transitions. [2022-11-02 20:55:15,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-02 20:55:15,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:15,035 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 20:55:15,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:15,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:15,259 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:15,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:15,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1195332088, now seen corresponding path program 1 times [2022-11-02 20:55:15,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:15,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1490620954] [2022-11-02 20:55:15,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:15,262 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:15,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:15,263 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:15,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-02 20:55:15,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:15,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:55:15,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:15,653 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 20:55:15,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:55:15,653 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:15,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1490620954] [2022-11-02 20:55:15,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1490620954] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:15,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:15,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:55:15,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894970354] [2022-11-02 20:55:15,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:15,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:55:15,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:15,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:55:15,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:55:15,662 INFO L87 Difference]: Start difference. First operand 66 states and 87 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 20:55:15,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:15,878 INFO L93 Difference]: Finished difference Result 121 states and 163 transitions. [2022-11-02 20:55:15,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:55:15,879 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 20:55:15,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:15,880 INFO L225 Difference]: With dead ends: 121 [2022-11-02 20:55:15,881 INFO L226 Difference]: Without dead ends: 69 [2022-11-02 20:55:15,881 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 20:55:15,882 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 39 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:15,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 283 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:55:15,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-02 20:55:15,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-11-02 20:55:15,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 51 states have internal predecessors, (61), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-02 20:55:15,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 91 transitions. [2022-11-02 20:55:15,901 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 91 transitions. Word has length 70 [2022-11-02 20:55:15,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:15,903 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 91 transitions. [2022-11-02 20:55:15,903 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 20:55:15,904 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 91 transitions. [2022-11-02 20:55:15,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-02 20:55:15,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:15,910 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 20:55:15,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:16,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:16,127 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:16,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:16,128 INFO L85 PathProgramCache]: Analyzing trace with hash -316025515, now seen corresponding path program 1 times [2022-11-02 20:55:16,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:16,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771143750] [2022-11-02 20:55:16,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:16,129 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:16,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:16,131 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:16,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-02 20:55:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:16,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:55:16,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:16,530 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 20:55:16,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:55:16,534 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:16,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771143750] [2022-11-02 20:55:16,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [771143750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:16,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:16,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:55:16,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493459958] [2022-11-02 20:55:16,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:16,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:55:16,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:16,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:55:16,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:55:16,538 INFO L87 Difference]: Start difference. First operand 69 states and 91 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 20:55:16,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:16,867 INFO L93 Difference]: Finished difference Result 136 states and 187 transitions. [2022-11-02 20:55:16,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:55:16,868 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 20:55:16,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:16,870 INFO L225 Difference]: With dead ends: 136 [2022-11-02 20:55:16,870 INFO L226 Difference]: Without dead ends: 81 [2022-11-02 20:55:16,871 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 20:55:16,871 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 67 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:16,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 336 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:55:16,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-02 20:55:16,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2022-11-02 20:55:16,883 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 20:55:16,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2022-11-02 20:55:16,884 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 72 [2022-11-02 20:55:16,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:16,885 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2022-11-02 20:55:16,885 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 20:55:16,885 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2022-11-02 20:55:16,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-02 20:55:16,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:16,887 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 20:55:16,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:17,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:17,127 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:17,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:17,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1928092350, now seen corresponding path program 1 times [2022-11-02 20:55:17,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:17,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780641623] [2022-11-02 20:55:17,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:17,129 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:17,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:17,130 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:17,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-02 20:55:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:17,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:55:17,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:17,486 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 20:55:17,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:55:17,486 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:17,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780641623] [2022-11-02 20:55:17,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780641623] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:17,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:17,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:55:17,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063880318] [2022-11-02 20:55:17,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:17,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:55:17,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:17,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:55:17,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:55:17,489 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 20:55:17,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:17,742 INFO L93 Difference]: Finished difference Result 137 states and 191 transitions. [2022-11-02 20:55:17,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:55:17,743 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 20:55:17,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:17,744 INFO L225 Difference]: With dead ends: 137 [2022-11-02 20:55:17,744 INFO L226 Difference]: Without dead ends: 80 [2022-11-02 20:55:17,745 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 20:55:17,746 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 48 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:17,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 276 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:55:17,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-02 20:55:17,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2022-11-02 20:55:17,758 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 20:55:17,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 95 transitions. [2022-11-02 20:55:17,759 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 95 transitions. Word has length 73 [2022-11-02 20:55:17,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:17,760 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 95 transitions. [2022-11-02 20:55:17,760 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 20:55:17,760 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 95 transitions. [2022-11-02 20:55:17,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-02 20:55:17,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:17,762 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 20:55:17,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:17,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:17,985 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:17,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:17,985 INFO L85 PathProgramCache]: Analyzing trace with hash 137287748, now seen corresponding path program 1 times [2022-11-02 20:55:17,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:17,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2014325209] [2022-11-02 20:55:17,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:17,986 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:17,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:17,994 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:18,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-02 20:55:18,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:18,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:55:18,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:18,334 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 20:55:18,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:55:18,334 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:18,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2014325209] [2022-11-02 20:55:18,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2014325209] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:18,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:18,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:55:18,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41161124] [2022-11-02 20:55:18,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:18,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:55:18,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:18,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:55:18,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:55:18,337 INFO L87 Difference]: Start difference. First operand 72 states and 95 transitions. Second operand has 7 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-02 20:55:18,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:18,431 INFO L93 Difference]: Finished difference Result 136 states and 183 transitions. [2022-11-02 20:55:18,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:55:18,432 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 20:55:18,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:18,437 INFO L225 Difference]: With dead ends: 136 [2022-11-02 20:55:18,437 INFO L226 Difference]: Without dead ends: 78 [2022-11-02 20:55:18,439 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 20:55:18,442 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 4 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:18,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 463 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:55:18,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-02 20:55:18,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2022-11-02 20:55:18,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 55 states have internal predecessors, (66), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-02 20:55:18,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 96 transitions. [2022-11-02 20:55:18,469 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 96 transitions. Word has length 81 [2022-11-02 20:55:18,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:18,469 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 96 transitions. [2022-11-02 20:55:18,469 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 20:55:18,470 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 96 transitions. [2022-11-02 20:55:18,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-02 20:55:18,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:18,471 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 20:55:18,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:18,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:18,686 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:18,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:18,687 INFO L85 PathProgramCache]: Analyzing trace with hash 431382673, now seen corresponding path program 1 times [2022-11-02 20:55:18,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:18,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1447327585] [2022-11-02 20:55:18,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:18,688 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:18,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:18,689 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:18,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-02 20:55:18,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:18,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:55:18,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:19,738 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 20:55:19,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:20,033 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 20:55:20,033 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:20,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1447327585] [2022-11-02 20:55:20,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1447327585] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:20,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:55:20,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-11-02 20:55:20,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164130951] [2022-11-02 20:55:20,034 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:20,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:55:20,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:20,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:55:20,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:55:20,035 INFO L87 Difference]: Start difference. First operand 73 states and 96 transitions. Second operand has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-02 20:55:20,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:20,850 INFO L93 Difference]: Finished difference Result 177 states and 254 transitions. [2022-11-02 20:55:20,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:55:20,851 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 20:55:20,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:20,852 INFO L225 Difference]: With dead ends: 177 [2022-11-02 20:55:20,852 INFO L226 Difference]: Without dead ends: 118 [2022-11-02 20:55:20,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 158 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 20:55:20,854 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 109 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:20,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 599 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 166 Invalid, 0 Unknown, 114 Unchecked, 0.5s Time] [2022-11-02 20:55:20,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-02 20:55:20,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 90. [2022-11-02 20:55:20,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 67 states have (on average 1.2985074626865671) internal successors, (87), 70 states have internal predecessors, (87), 14 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (18), 13 states have call predecessors, (18), 13 states have call successors, (18) [2022-11-02 20:55:20,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 119 transitions. [2022-11-02 20:55:20,871 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 119 transitions. Word has length 83 [2022-11-02 20:55:20,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:20,872 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 119 transitions. [2022-11-02 20:55:20,872 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 20:55:20,872 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 119 transitions. [2022-11-02 20:55:20,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-02 20:55:20,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:20,874 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 20:55:20,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:21,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:21,087 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:21,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:21,087 INFO L85 PathProgramCache]: Analyzing trace with hash 13986067, now seen corresponding path program 1 times [2022-11-02 20:55:21,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:21,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1962978820] [2022-11-02 20:55:21,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:21,088 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:21,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:21,089 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:21,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-02 20:55:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:21,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:55:21,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:21,376 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 20:55:21,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:55:21,377 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:21,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1962978820] [2022-11-02 20:55:21,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1962978820] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:21,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:21,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:55:21,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278444166] [2022-11-02 20:55:21,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:21,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:55:21,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:21,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:55:21,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:55:21,380 INFO L87 Difference]: Start difference. First operand 90 states and 119 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 20:55:21,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:21,433 INFO L93 Difference]: Finished difference Result 169 states and 235 transitions. [2022-11-02 20:55:21,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:55:21,434 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 20:55:21,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:21,436 INFO L225 Difference]: With dead ends: 169 [2022-11-02 20:55:21,436 INFO L226 Difference]: Without dead ends: 93 [2022-11-02 20:55:21,437 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 20:55:21,438 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 8 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:21,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 247 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:55:21,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-02 20:55:21,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2022-11-02 20:55:21,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 67 states have (on average 1.2835820895522387) internal successors, (86), 70 states have internal predecessors, (86), 14 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (18), 13 states have call predecessors, (18), 13 states have call successors, (18) [2022-11-02 20:55:21,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 118 transitions. [2022-11-02 20:55:21,462 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 118 transitions. Word has length 83 [2022-11-02 20:55:21,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:21,463 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 118 transitions. [2022-11-02 20:55:21,463 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 20:55:21,463 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 118 transitions. [2022-11-02 20:55:21,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-02 20:55:21,464 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:21,464 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 20:55:21,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-11-02 20:55:21,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:21,682 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:21,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:21,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1975560725, now seen corresponding path program 1 times [2022-11-02 20:55:21,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:21,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841875164] [2022-11-02 20:55:21,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:21,684 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:21,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:21,685 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:21,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-02 20:55:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:21,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:55:21,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:21,940 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 20:55:21,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:55:21,940 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:21,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1841875164] [2022-11-02 20:55:21,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1841875164] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:21,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:21,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:55:21,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003143769] [2022-11-02 20:55:21,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:21,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:55:21,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:21,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:55:21,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:55:21,943 INFO L87 Difference]: Start difference. First operand 90 states and 118 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 20:55:22,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:22,017 INFO L93 Difference]: Finished difference Result 167 states and 231 transitions. [2022-11-02 20:55:22,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:55:22,018 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 20:55:22,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:22,020 INFO L225 Difference]: With dead ends: 167 [2022-11-02 20:55:22,020 INFO L226 Difference]: Without dead ends: 91 [2022-11-02 20:55:22,020 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 20:55:22,023 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 6 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:22,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 315 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:55:22,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-02 20:55:22,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2022-11-02 20:55:22,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.25) internal successors, (80), 67 states have internal predecessors, (80), 14 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (18), 13 states have call predecessors, (18), 13 states have call successors, (18) [2022-11-02 20:55:22,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 112 transitions. [2022-11-02 20:55:22,040 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 112 transitions. Word has length 83 [2022-11-02 20:55:22,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:22,040 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 112 transitions. [2022-11-02 20:55:22,041 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 20:55:22,041 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 112 transitions. [2022-11-02 20:55:22,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:55:22,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:22,042 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 20:55:22,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:22,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:22,260 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:22,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:22,261 INFO L85 PathProgramCache]: Analyzing trace with hash -233275002, now seen corresponding path program 1 times [2022-11-02 20:55:22,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:22,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [652143820] [2022-11-02 20:55:22,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:22,261 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:22,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:22,263 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:22,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-02 20:55:22,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:22,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:55:22,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:24,259 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 20:55:24,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:27,718 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:55:27,719 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 20:55:27,768 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-02 20:55:27,768 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 20:55:27,840 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 20:55:27,840 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:27,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [652143820] [2022-11-02 20:55:27,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [652143820] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:27,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:55:27,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2022-11-02 20:55:27,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249364783] [2022-11-02 20:55:27,841 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:27,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:55:27,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:27,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:55:27,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:55:27,842 INFO L87 Difference]: Start difference. First operand 87 states and 112 transitions. Second operand has 19 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 8 states have call successors, (17), 4 states have call predecessors, (17), 7 states have return successors, (16), 6 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-02 20:55:29,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:29,079 INFO L93 Difference]: Finished difference Result 182 states and 232 transitions. [2022-11-02 20:55:29,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 20:55:29,080 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 20:55:29,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:29,081 INFO L225 Difference]: With dead ends: 182 [2022-11-02 20:55:29,081 INFO L226 Difference]: Without dead ends: 108 [2022-11-02 20:55:29,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 147 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:55:29,083 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 82 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:29,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 535 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 192 Invalid, 0 Unknown, 99 Unchecked, 0.9s Time] [2022-11-02 20:55:29,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-02 20:55:29,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 91. [2022-11-02 20:55:29,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 70 states have internal predecessors, (82), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (18), 13 states have call predecessors, (18), 13 states have call successors, (18) [2022-11-02 20:55:29,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 114 transitions. [2022-11-02 20:55:29,098 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 114 transitions. Word has length 84 [2022-11-02 20:55:29,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:29,099 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 114 transitions. [2022-11-02 20:55:29,099 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 20:55:29,099 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 114 transitions. [2022-11-02 20:55:29,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:55:29,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:29,101 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 20:55:29,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:29,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:29,321 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:29,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:29,322 INFO L85 PathProgramCache]: Analyzing trace with hash -980582014, now seen corresponding path program 1 times [2022-11-02 20:55:29,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:29,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [717944584] [2022-11-02 20:55:29,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:29,322 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:29,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:29,324 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:29,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-02 20:55:29,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:29,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-02 20:55:29,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:29,781 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 20:55:29,787 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 20:55:30,925 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 20:55:30,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:55:30,925 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:30,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [717944584] [2022-11-02 20:55:30,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [717944584] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:30,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:30,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-02 20:55:30,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619611134] [2022-11-02 20:55:30,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:30,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:55:30,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:30,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:55:30,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:55:30,927 INFO L87 Difference]: Start difference. First operand 91 states and 114 transitions. Second operand has 11 states, 10 states have (on average 6.6) internal successors, (66), 11 states have internal predecessors, (66), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-02 20:55:31,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:31,320 INFO L93 Difference]: Finished difference Result 237 states and 301 transitions. [2022-11-02 20:55:31,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:55:31,321 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 20:55:31,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:31,322 INFO L225 Difference]: With dead ends: 237 [2022-11-02 20:55:31,322 INFO L226 Difference]: Without dead ends: 164 [2022-11-02 20:55:31,323 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 20:55:31,324 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 36 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:31,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 559 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 85 Unchecked, 0.2s Time] [2022-11-02 20:55:31,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-11-02 20:55:31,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 147. [2022-11-02 20:55:31,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 113 states have (on average 1.247787610619469) internal successors, (141), 118 states have internal predecessors, (141), 19 states have call successors, (19), 11 states have call predecessors, (19), 14 states have return successors, (24), 17 states have call predecessors, (24), 18 states have call successors, (24) [2022-11-02 20:55:31,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 184 transitions. [2022-11-02 20:55:31,348 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 184 transitions. Word has length 84 [2022-11-02 20:55:31,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:31,349 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 184 transitions. [2022-11-02 20:55:31,349 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 20:55:31,349 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 184 transitions. [2022-11-02 20:55:31,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:55:31,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:31,351 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 20:55:31,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:31,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:31,559 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:31,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:31,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1490055104, now seen corresponding path program 1 times [2022-11-02 20:55:31,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:31,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [480236250] [2022-11-02 20:55:31,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:31,560 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:31,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:31,560 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:31,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-02 20:55:31,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:31,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-02 20:55:31,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:33,988 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 20:55:33,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:37,610 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:55:37,610 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 20:55:37,639 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-02 20:55:37,639 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 20:55:37,669 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 20:55:37,669 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:37,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [480236250] [2022-11-02 20:55:37,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [480236250] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:37,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:55:37,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2022-11-02 20:55:37,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684466422] [2022-11-02 20:55:37,670 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:37,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 20:55:37,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:37,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 20:55:37,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:55:37,672 INFO L87 Difference]: Start difference. First operand 147 states and 184 transitions. Second operand has 23 states, 21 states have (on average 4.857142857142857) internal successors, (102), 21 states have internal predecessors, (102), 8 states have call successors, (17), 4 states have call predecessors, (17), 7 states have return successors, (16), 6 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-02 20:55:40,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:40,670 INFO L93 Difference]: Finished difference Result 276 states and 344 transitions. [2022-11-02 20:55:40,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-02 20:55:40,672 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 20:55:40,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:40,673 INFO L225 Difference]: With dead ends: 276 [2022-11-02 20:55:40,673 INFO L226 Difference]: Without dead ends: 185 [2022-11-02 20:55:40,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 151 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=278, Invalid=1204, Unknown=0, NotChecked=0, Total=1482 [2022-11-02 20:55:40,675 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 145 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:40,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 772 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 341 Invalid, 0 Unknown, 144 Unchecked, 1.2s Time] [2022-11-02 20:55:40,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-02 20:55:40,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 151. [2022-11-02 20:55:40,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 117 states have (on average 1.2307692307692308) internal successors, (144), 121 states have internal predecessors, (144), 19 states have call successors, (19), 12 states have call predecessors, (19), 14 states have return successors, (24), 17 states have call predecessors, (24), 18 states have call successors, (24) [2022-11-02 20:55:40,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 187 transitions. [2022-11-02 20:55:40,702 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 187 transitions. Word has length 84 [2022-11-02 20:55:40,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:40,703 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 187 transitions. [2022-11-02 20:55:40,703 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 20:55:40,703 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 187 transitions. [2022-11-02 20:55:40,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:55:40,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:40,705 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 20:55:40,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:40,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:40,918 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:40,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:40,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1467422850, now seen corresponding path program 1 times [2022-11-02 20:55:40,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:40,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411540383] [2022-11-02 20:55:40,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:40,920 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:40,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:40,921 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:40,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-02 20:55:41,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:41,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 20:55:41,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:42,248 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 20:55:42,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:43,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-02 20:55:43,357 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:55:43,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2022-11-02 20:55:43,794 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 20:55:43,794 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:43,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411540383] [2022-11-02 20:55:43,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411540383] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:43,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:55:43,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2022-11-02 20:55:43,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333278290] [2022-11-02 20:55:43,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:43,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-02 20:55:43,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:43,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-02 20:55:43,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-11-02 20:55:43,797 INFO L87 Difference]: Start difference. First operand 151 states and 187 transitions. Second operand has 27 states, 25 states have (on average 4.48) internal successors, (112), 25 states have internal predecessors, (112), 9 states have call successors, (17), 3 states have call predecessors, (17), 7 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-02 20:55:46,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:46,577 INFO L93 Difference]: Finished difference Result 345 states and 467 transitions. [2022-11-02 20:55:46,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:55:46,578 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 4.48) internal successors, (112), 25 states have internal predecessors, (112), 9 states have call successors, (17), 3 states have call predecessors, (17), 7 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 84 [2022-11-02 20:55:46,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:46,580 INFO L225 Difference]: With dead ends: 345 [2022-11-02 20:55:46,580 INFO L226 Difference]: Without dead ends: 261 [2022-11-02 20:55:46,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2022-11-02 20:55:46,582 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 190 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:46,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 1008 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 621 Invalid, 0 Unknown, 212 Unchecked, 1.8s Time] [2022-11-02 20:55:46,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-02 20:55:46,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 210. [2022-11-02 20:55:46,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 160 states have (on average 1.20625) internal successors, (193), 166 states have internal predecessors, (193), 29 states have call successors, (29), 16 states have call predecessors, (29), 20 states have return successors, (54), 27 states have call predecessors, (54), 28 states have call successors, (54) [2022-11-02 20:55:46,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 276 transitions. [2022-11-02 20:55:46,640 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 276 transitions. Word has length 84 [2022-11-02 20:55:46,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:46,640 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 276 transitions. [2022-11-02 20:55:46,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 4.48) internal successors, (112), 25 states have internal predecessors, (112), 9 states have call successors, (17), 3 states have call predecessors, (17), 7 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-02 20:55:46,641 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 276 transitions. [2022-11-02 20:55:46,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:55:46,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:46,642 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 20:55:46,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-11-02 20:55:46,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:46,860 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:46,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:46,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1192663236, now seen corresponding path program 1 times [2022-11-02 20:55:46,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:46,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339265547] [2022-11-02 20:55:46,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:46,862 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:46,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:46,862 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:46,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-02 20:55:47,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:47,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:55:47,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:47,150 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 20:55:47,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:55:47,151 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:47,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339265547] [2022-11-02 20:55:47,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339265547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:47,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:47,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:55:47,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745718991] [2022-11-02 20:55:47,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:47,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:55:47,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:47,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:55:47,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:55:47,152 INFO L87 Difference]: Start difference. First operand 210 states and 276 transitions. Second operand has 6 states, 5 states have (on average 12.6) internal successors, (63), 6 states have internal predecessors, (63), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-02 20:55:47,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:47,284 INFO L93 Difference]: Finished difference Result 460 states and 626 transitions. [2022-11-02 20:55:47,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:55:47,285 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 20:55:47,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:47,286 INFO L225 Difference]: With dead ends: 460 [2022-11-02 20:55:47,286 INFO L226 Difference]: Without dead ends: 197 [2022-11-02 20:55:47,288 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 20:55:47,288 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 50 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:47,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 332 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:55:47,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-02 20:55:47,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 195. [2022-11-02 20:55:47,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 145 states have (on average 1.1793103448275861) internal successors, (171), 152 states have internal predecessors, (171), 29 states have call successors, (29), 15 states have call predecessors, (29), 20 states have return successors, (54), 27 states have call predecessors, (54), 28 states have call successors, (54) [2022-11-02 20:55:47,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 254 transitions. [2022-11-02 20:55:47,327 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 254 transitions. Word has length 84 [2022-11-02 20:55:47,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:47,327 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 254 transitions. [2022-11-02 20:55:47,327 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 20:55:47,328 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 254 transitions. [2022-11-02 20:55:47,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-02 20:55:47,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:47,329 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 20:55:47,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-11-02 20:55:47,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:47,543 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:47,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:47,543 INFO L85 PathProgramCache]: Analyzing trace with hash -20971104, now seen corresponding path program 1 times [2022-11-02 20:55:47,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:47,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [111011339] [2022-11-02 20:55:47,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:47,544 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:47,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:47,545 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:47,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-02 20:55:47,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:47,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:55:47,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:47,888 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 20:55:47,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:55:47,889 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:47,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [111011339] [2022-11-02 20:55:47,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [111011339] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:47,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:47,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:55:47,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835543496] [2022-11-02 20:55:47,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:47,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:55:47,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:47,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:55:47,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:55:47,900 INFO L87 Difference]: Start difference. First operand 195 states and 254 transitions. Second operand has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-02 20:55:48,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:48,186 INFO L93 Difference]: Finished difference Result 289 states and 383 transitions. [2022-11-02 20:55:48,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:55:48,187 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 20:55:48,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:48,189 INFO L225 Difference]: With dead ends: 289 [2022-11-02 20:55:48,189 INFO L226 Difference]: Without dead ends: 194 [2022-11-02 20:55:48,190 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 20:55:48,190 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 44 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:48,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 322 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:55:48,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-11-02 20:55:48,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2022-11-02 20:55:48,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 143 states have (on average 1.167832167832168) internal successors, (167), 149 states have internal predecessors, (167), 29 states have call successors, (29), 15 states have call predecessors, (29), 19 states have return successors, (50), 27 states have call predecessors, (50), 28 states have call successors, (50) [2022-11-02 20:55:48,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 246 transitions. [2022-11-02 20:55:48,228 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 246 transitions. Word has length 86 [2022-11-02 20:55:48,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:48,228 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 246 transitions. [2022-11-02 20:55:48,229 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 20:55:48,229 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 246 transitions. [2022-11-02 20:55:48,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-02 20:55:48,231 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:48,231 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 20:55:48,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:48,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:48,450 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:48,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:48,450 INFO L85 PathProgramCache]: Analyzing trace with hash 428580672, now seen corresponding path program 1 times [2022-11-02 20:55:48,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:48,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1202354034] [2022-11-02 20:55:48,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:48,451 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:48,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:48,452 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:48,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-02 20:55:48,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:48,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-02 20:55:48,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:48,895 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-02 20:55:48,895 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 20:55:48,907 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 20:55:48,920 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 20:55:48,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:55:48,952 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 63 treesize of output 13 [2022-11-02 20:55:48,959 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 13 treesize of output 9 [2022-11-02 20:55:49,168 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| (_ BitVec 64))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30|) (_ bv24 64)))) (and (not (= .cse0 (_ bv0 64))) (= .cse0 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30|)))) (exists ((v_DerPreprocessor_3 (Array (_ BitVec 64) (_ BitVec 64))) (v_DerPreprocessor_2 (Array (_ BitVec 64) (_ BitVec 64))) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| (_ BitVec 64))) (let ((.cse1 (select v_DerPreprocessor_3 (_ bv24 64)))) (and (= .cse1 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30|) (_ bv24 64))) (not (= .cse1 (_ bv0 64))) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse1 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| v_DerPreprocessor_3) .cse1 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| v_DerPreprocessor_3) .cse1) (select |c_#memory_$Pointer$.base| .cse1)))))) is different from true [2022-11-02 20:55:50,029 WARN L855 $PredicateComparison]: unable to prove that (and (or (exists ((v_DerPreprocessor_3 (Array (_ BitVec 64) (_ BitVec 64))) (v_DerPreprocessor_2 (Array (_ BitVec 64) (_ BitVec 64))) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| (_ BitVec 64))) (let ((.cse0 (select v_DerPreprocessor_3 (_ bv24 64)))) (and (not (= .cse0 (_ bv0 64))) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| v_DerPreprocessor_3) .cse0 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| v_DerPreprocessor_3) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= .cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31|) (_ bv24 64)))))) (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| (_ BitVec 64))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31|) (_ bv24 64)))) (and (= |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| .cse1) (not (= (_ bv0 64) .cse1)))))) (or (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| (_ BitVec 64))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30|) (_ bv24 64)))) (and (not (= .cse2 (_ bv0 64))) (= .cse2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30|)))) (exists ((v_DerPreprocessor_3 (Array (_ BitVec 64) (_ BitVec 64))) (v_DerPreprocessor_2 (Array (_ BitVec 64) (_ BitVec 64))) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| (_ BitVec 64))) (let ((.cse3 (select v_DerPreprocessor_3 (_ bv24 64)))) (and (= .cse3 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30|) (_ bv24 64))) (not (= .cse3 (_ bv0 64))) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse3 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| v_DerPreprocessor_3) .cse3 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| v_DerPreprocessor_3) .cse3) (select |c_#memory_$Pointer$.base| .cse3))))))) is different from true [2022-11-02 20:55:50,615 WARN L855 $PredicateComparison]: unable to prove that (and (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_aws_linked_list_begin_~list#1.base|) (_ bv24 64)))) (or (exists ((v_DerPreprocessor_3 (Array (_ BitVec 64) (_ BitVec 64))) (v_DerPreprocessor_2 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse0 (select v_DerPreprocessor_3 (_ bv24 64)))) (and (not (= .cse0 (_ bv0 64))) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_2) |c_ULTIMATE.start_aws_linked_list_begin_~list#1.base| v_DerPreprocessor_3) .cse0 v_DerPreprocessor_2) |c_ULTIMATE.start_aws_linked_list_begin_~list#1.base| v_DerPreprocessor_3) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= .cse0 .cse1)))) (and (= .cse1 |c_ULTIMATE.start_aws_linked_list_begin_~list#1.base|) (not (= (_ bv0 64) .cse1))))) (or (exists ((v_DerPreprocessor_3 (Array (_ BitVec 64) (_ BitVec 64))) (v_DerPreprocessor_2 (Array (_ BitVec 64) (_ BitVec 64))) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| (_ BitVec 64))) (let ((.cse2 (select v_DerPreprocessor_3 (_ bv24 64)))) (and (not (= .cse2 (_ bv0 64))) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| v_DerPreprocessor_3) .cse2 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| v_DerPreprocessor_3) .cse2) (select |c_#memory_$Pointer$.base| .cse2)) (= .cse2 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31|) (_ bv24 64)))))) (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| (_ BitVec 64))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31|) (_ bv24 64)))) (and (= |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| .cse3) (not (= (_ bv0 64) .cse3)))))) (or (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| (_ BitVec 64))) (let ((.cse4 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30|) (_ bv24 64)))) (and (not (= .cse4 (_ bv0 64))) (= .cse4 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30|)))) (exists ((v_DerPreprocessor_3 (Array (_ BitVec 64) (_ BitVec 64))) (v_DerPreprocessor_2 (Array (_ BitVec 64) (_ BitVec 64))) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| (_ BitVec 64))) (let ((.cse5 (select v_DerPreprocessor_3 (_ bv24 64)))) (and (= .cse5 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30|) (_ bv24 64))) (not (= .cse5 (_ bv0 64))) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse5 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| v_DerPreprocessor_3) .cse5 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| v_DerPreprocessor_3) .cse5) (select |c_#memory_$Pointer$.base| .cse5)))))) (= (_ bv0 64) |c_ULTIMATE.start_aws_linked_list_begin_~list#1.offset|)) is different from true [2022-11-02 20:55:50,696 WARN L855 $PredicateComparison]: unable to prove that (and (or (exists ((|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_10| (_ BitVec 64))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_10|) (_ bv24 64)))) (and (= .cse0 |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_10|) (not (= (_ bv0 64) .cse0))))) (exists ((v_DerPreprocessor_3 (Array (_ BitVec 64) (_ BitVec 64))) (v_DerPreprocessor_2 (Array (_ BitVec 64) (_ BitVec 64))) (|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_10| (_ BitVec 64))) (let ((.cse1 (select v_DerPreprocessor_3 (_ bv24 64)))) (and (not (= .cse1 (_ bv0 64))) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse1 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_10| v_DerPreprocessor_3) .cse1 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_10| v_DerPreprocessor_3) .cse1) (select |c_#memory_$Pointer$.base| .cse1)) (= .cse1 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_10|) (_ bv24 64))))))) (or (exists ((v_DerPreprocessor_3 (Array (_ BitVec 64) (_ BitVec 64))) (v_DerPreprocessor_2 (Array (_ BitVec 64) (_ BitVec 64))) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| (_ BitVec 64))) (let ((.cse2 (select v_DerPreprocessor_3 (_ bv24 64)))) (and (not (= .cse2 (_ bv0 64))) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| v_DerPreprocessor_3) .cse2 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| v_DerPreprocessor_3) .cse2) (select |c_#memory_$Pointer$.base| .cse2)) (= .cse2 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31|) (_ bv24 64)))))) (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| (_ BitVec 64))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31|) (_ bv24 64)))) (and (= |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| .cse3) (not (= (_ bv0 64) .cse3)))))) (or (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| (_ BitVec 64))) (let ((.cse4 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30|) (_ bv24 64)))) (and (not (= .cse4 (_ bv0 64))) (= .cse4 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30|)))) (exists ((v_DerPreprocessor_3 (Array (_ BitVec 64) (_ BitVec 64))) (v_DerPreprocessor_2 (Array (_ BitVec 64) (_ BitVec 64))) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| (_ BitVec 64))) (let ((.cse5 (select v_DerPreprocessor_3 (_ bv24 64)))) (and (= .cse5 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30|) (_ bv24 64))) (not (= .cse5 (_ bv0 64))) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse5 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| v_DerPreprocessor_3) .cse5 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| v_DerPreprocessor_3) .cse5) (select |c_#memory_$Pointer$.base| .cse5))))))) is different from true [2022-11-02 20:55:50,803 WARN L855 $PredicateComparison]: unable to prove that (and (= |c_aws_linked_list_is_valid_#in~list#1.offset| |c_aws_linked_list_is_valid_~list#1.offset|) (or (exists ((|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_10| (_ BitVec 64))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_10|) (_ bv24 64)))) (and (= .cse0 |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_10|) (not (= (_ bv0 64) .cse0))))) (exists ((v_DerPreprocessor_3 (Array (_ BitVec 64) (_ BitVec 64))) (v_DerPreprocessor_2 (Array (_ BitVec 64) (_ BitVec 64))) (|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_10| (_ BitVec 64))) (let ((.cse1 (select v_DerPreprocessor_3 (_ bv24 64)))) (and (not (= .cse1 (_ bv0 64))) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse1 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_10| v_DerPreprocessor_3) .cse1 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_10| v_DerPreprocessor_3) .cse1) (select |c_#memory_$Pointer$.base| .cse1)) (= .cse1 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_10|) (_ bv24 64))))))) (or (exists ((v_DerPreprocessor_3 (Array (_ BitVec 64) (_ BitVec 64))) (v_DerPreprocessor_2 (Array (_ BitVec 64) (_ BitVec 64))) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| (_ BitVec 64))) (let ((.cse2 (select v_DerPreprocessor_3 (_ bv24 64)))) (and (not (= .cse2 (_ bv0 64))) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| v_DerPreprocessor_3) .cse2 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| v_DerPreprocessor_3) .cse2) (select |c_#memory_$Pointer$.base| .cse2)) (= .cse2 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31|) (_ bv24 64)))))) (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| (_ BitVec 64))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31|) (_ bv24 64)))) (and (= |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| .cse3) (not (= (_ bv0 64) .cse3)))))) (= |c_aws_linked_list_is_valid_#in~list#1.base| |c_aws_linked_list_is_valid_~list#1.base|) (or (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| (_ BitVec 64))) (let ((.cse4 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30|) (_ bv24 64)))) (and (not (= .cse4 (_ bv0 64))) (= .cse4 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30|)))) (exists ((v_DerPreprocessor_3 (Array (_ BitVec 64) (_ BitVec 64))) (v_DerPreprocessor_2 (Array (_ BitVec 64) (_ BitVec 64))) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| (_ BitVec 64))) (let ((.cse5 (select v_DerPreprocessor_3 (_ bv24 64)))) (and (= .cse5 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30|) (_ bv24 64))) (not (= .cse5 (_ bv0 64))) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse5 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| v_DerPreprocessor_3) .cse5 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| v_DerPreprocessor_3) .cse5) (select |c_#memory_$Pointer$.base| .cse5))))))) is different from true [2022-11-02 20:55:51,324 WARN L855 $PredicateComparison]: unable to prove that (and (or (exists ((|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_10| (_ BitVec 64))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_10|) (_ bv24 64)))) (and (= .cse0 |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_10|) (not (= (_ bv0 64) .cse0))))) (exists ((v_DerPreprocessor_3 (Array (_ BitVec 64) (_ BitVec 64))) (v_DerPreprocessor_2 (Array (_ BitVec 64) (_ BitVec 64))) (|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_10| (_ BitVec 64))) (let ((.cse1 (select v_DerPreprocessor_3 (_ bv24 64)))) (and (not (= .cse1 (_ bv0 64))) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse1 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_10| v_DerPreprocessor_3) .cse1 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_10| v_DerPreprocessor_3) .cse1) (select |c_#memory_$Pointer$.base| .cse1)) (= .cse1 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_10|) (_ bv24 64))))))) (or (exists ((v_DerPreprocessor_3 (Array (_ BitVec 64) (_ BitVec 64))) (v_DerPreprocessor_2 (Array (_ BitVec 64) (_ BitVec 64))) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| (_ BitVec 64))) (let ((.cse2 (select v_DerPreprocessor_3 (_ bv24 64)))) (and (not (= .cse2 (_ bv0 64))) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| v_DerPreprocessor_3) .cse2 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| v_DerPreprocessor_3) .cse2) (select |c_#memory_$Pointer$.base| .cse2)) (= .cse2 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31|) (_ bv24 64)))))) (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| (_ BitVec 64))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31|) (_ bv24 64)))) (and (= |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| .cse3) (not (= (_ bv0 64) .cse3)))))) (or (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| (_ BitVec 64))) (let ((.cse4 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30|) (_ bv24 64)))) (and (not (= .cse4 (_ bv0 64))) (= .cse4 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30|)))) (exists ((v_DerPreprocessor_3 (Array (_ BitVec 64) (_ BitVec 64))) (v_DerPreprocessor_2 (Array (_ BitVec 64) (_ BitVec 64))) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| (_ BitVec 64))) (let ((.cse5 (select v_DerPreprocessor_3 (_ bv24 64)))) (and (= .cse5 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30|) (_ bv24 64))) (not (= .cse5 (_ bv0 64))) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse5 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| v_DerPreprocessor_3) .cse5 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| v_DerPreprocessor_3) .cse5) (select |c_#memory_$Pointer$.base| .cse5)))))) (or |c_aws_linked_list_is_valid_#t~short303#1| (= (select (select |c_#memory_$Pointer$.base| |c_aws_linked_list_is_valid_#in~list#1.base|) (bvadd |c_aws_linked_list_is_valid_#in~list#1.offset| (_ bv24 64))) (_ bv0 64)))) is different from true [2022-11-02 20:55:52,509 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 20:55:52,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:53,402 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:55:53,403 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 124 treesize of output 127 [2022-11-02 20:55:53,414 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 20:55:53,420 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 20:55:53,534 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 20:55:53,553 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 20:55:53,810 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 20:55:53,810 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:55:53,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1202354034] [2022-11-02 20:55:53,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1202354034] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:53,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:55:53,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2022-11-02 20:55:53,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013655989] [2022-11-02 20:55:53,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:53,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 20:55:53,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:55:53,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 20:55:53,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=215, Unknown=18, NotChecked=210, Total=506 [2022-11-02 20:55:53,812 INFO L87 Difference]: Start difference. First operand 192 states and 246 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 20:55:54,210 WARN L855 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (let ((.cse2 (bvadd (_ bv24 64) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse2))) (or (and (not (= .cse0 (_ bv0 64))) (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base| .cse0)) (exists ((v_DerPreprocessor_3 (Array (_ BitVec 64) (_ BitVec 64))) (v_DerPreprocessor_2 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse1 (select v_DerPreprocessor_3 .cse2))) (and (not (= (_ bv0 64) .cse1)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse1 v_DerPreprocessor_2) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base| v_DerPreprocessor_3) .cse1 v_DerPreprocessor_2) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base| v_DerPreprocessor_3) .cse1) (select |c_#memory_$Pointer$.base| .cse1)) (= .cse0 .cse1))))))) (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset|) (not (= (_ bv0 64) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) (= (_ bv0 64) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|)) is different from true [2022-11-02 20:55:55,526 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_aws_linked_list_begin_~list#1.base|))) (and (let ((.cse1 (select .cse2 (_ bv24 64)))) (or (exists ((v_DerPreprocessor_3 (Array (_ BitVec 64) (_ BitVec 64))) (v_DerPreprocessor_2 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse0 (select v_DerPreprocessor_3 (_ bv24 64)))) (and (not (= .cse0 (_ bv0 64))) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_2) |c_ULTIMATE.start_aws_linked_list_begin_~list#1.base| v_DerPreprocessor_3) .cse0 v_DerPreprocessor_2) |c_ULTIMATE.start_aws_linked_list_begin_~list#1.base| v_DerPreprocessor_3) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= .cse0 .cse1)))) (and (= .cse1 |c_ULTIMATE.start_aws_linked_list_begin_~list#1.base|) (not (= (_ bv0 64) .cse1))))) (or (exists ((v_DerPreprocessor_3 (Array (_ BitVec 64) (_ BitVec 64))) (v_DerPreprocessor_2 (Array (_ BitVec 64) (_ BitVec 64))) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| (_ BitVec 64))) (let ((.cse3 (select v_DerPreprocessor_3 (_ bv24 64)))) (and (not (= .cse3 (_ bv0 64))) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse3 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| v_DerPreprocessor_3) .cse3 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| v_DerPreprocessor_3) .cse3) (select |c_#memory_$Pointer$.base| .cse3)) (= .cse3 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31|) (_ bv24 64)))))) (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| (_ BitVec 64))) (let ((.cse4 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31|) (_ bv24 64)))) (and (= |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| .cse4) (not (= (_ bv0 64) .cse4)))))) (or (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| (_ BitVec 64))) (let ((.cse5 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30|) (_ bv24 64)))) (and (not (= .cse5 (_ bv0 64))) (= .cse5 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30|)))) (exists ((v_DerPreprocessor_3 (Array (_ BitVec 64) (_ BitVec 64))) (v_DerPreprocessor_2 (Array (_ BitVec 64) (_ BitVec 64))) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| (_ BitVec 64))) (let ((.cse6 (select v_DerPreprocessor_3 (_ bv24 64)))) (and (= .cse6 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30|) (_ bv24 64))) (not (= .cse6 (_ bv0 64))) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse6 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| v_DerPreprocessor_3) .cse6 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| v_DerPreprocessor_3) .cse6) (select |c_#memory_$Pointer$.base| .cse6)))))) (= (_ bv0 64) |c_ULTIMATE.start_aws_linked_list_begin_~list#1.offset|) (not (= (_ bv0 64) (select .cse2 (bvadd (_ bv24 64) |c_ULTIMATE.start_aws_linked_list_begin_~list#1.offset|)))))) is different from true [2022-11-02 20:55:55,569 WARN L855 $PredicateComparison]: unable to prove that (and (= |c_aws_linked_list_is_valid_#in~list#1.offset| |c_aws_linked_list_is_valid_~list#1.offset|) (or (exists ((|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_10| (_ BitVec 64))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_10|) (_ bv24 64)))) (and (= .cse0 |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_10|) (not (= (_ bv0 64) .cse0))))) (exists ((v_DerPreprocessor_3 (Array (_ BitVec 64) (_ BitVec 64))) (v_DerPreprocessor_2 (Array (_ BitVec 64) (_ BitVec 64))) (|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_10| (_ BitVec 64))) (let ((.cse1 (select v_DerPreprocessor_3 (_ bv24 64)))) (and (not (= .cse1 (_ bv0 64))) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse1 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_10| v_DerPreprocessor_3) .cse1 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_10| v_DerPreprocessor_3) .cse1) (select |c_#memory_$Pointer$.base| .cse1)) (= .cse1 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_10|) (_ bv24 64))))))) (or (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$.base| |c_aws_linked_list_is_valid_~list#1.base|) (bvadd (_ bv24 64) |c_aws_linked_list_is_valid_~list#1.offset|)))) (= (select (select |c_#memory_$Pointer$.base| |c_aws_linked_list_is_valid_#in~list#1.base|) (bvadd |c_aws_linked_list_is_valid_#in~list#1.offset| (_ bv24 64))) (_ bv0 64))) (or (exists ((v_DerPreprocessor_3 (Array (_ BitVec 64) (_ BitVec 64))) (v_DerPreprocessor_2 (Array (_ BitVec 64) (_ BitVec 64))) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| (_ BitVec 64))) (let ((.cse2 (select v_DerPreprocessor_3 (_ bv24 64)))) (and (not (= .cse2 (_ bv0 64))) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| v_DerPreprocessor_3) .cse2 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| v_DerPreprocessor_3) .cse2) (select |c_#memory_$Pointer$.base| .cse2)) (= .cse2 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31|) (_ bv24 64)))))) (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| (_ BitVec 64))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31|) (_ bv24 64)))) (and (= |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_31| .cse3) (not (= (_ bv0 64) .cse3)))))) (= |c_aws_linked_list_is_valid_#in~list#1.base| |c_aws_linked_list_is_valid_~list#1.base|) (or (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| (_ BitVec 64))) (let ((.cse4 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30|) (_ bv24 64)))) (and (not (= .cse4 (_ bv0 64))) (= .cse4 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30|)))) (exists ((v_DerPreprocessor_3 (Array (_ BitVec 64) (_ BitVec 64))) (v_DerPreprocessor_2 (Array (_ BitVec 64) (_ BitVec 64))) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| (_ BitVec 64))) (let ((.cse5 (select v_DerPreprocessor_3 (_ bv24 64)))) (and (= .cse5 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30|) (_ bv24 64))) (not (= .cse5 (_ bv0 64))) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse5 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| v_DerPreprocessor_3) .cse5 v_DerPreprocessor_2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_30| v_DerPreprocessor_3) .cse5) (select |c_#memory_$Pointer$.base| .cse5))))))) is different from true [2022-11-02 20:55:56,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:56,357 INFO L93 Difference]: Finished difference Result 424 states and 589 transitions. [2022-11-02 20:55:56,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-02 20:55:56,359 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 20:55:56,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:56,361 INFO L225 Difference]: With dead ends: 424 [2022-11-02 20:55:56,362 INFO L226 Difference]: Without dead ends: 335 [2022-11-02 20:55:56,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=104, Invalid=368, Unknown=26, NotChecked=432, Total=930 [2022-11-02 20:55:56,363 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 43 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1460 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:56,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 793 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 391 Invalid, 0 Unknown, 1460 Unchecked, 1.6s Time] [2022-11-02 20:55:56,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-11-02 20:55:56,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 283. [2022-11-02 20:55:56,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 214 states have (on average 1.1869158878504673) internal successors, (254), 221 states have internal predecessors, (254), 41 states have call successors, (41), 22 states have call predecessors, (41), 27 states have return successors, (64), 39 states have call predecessors, (64), 40 states have call successors, (64) [2022-11-02 20:55:56,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 359 transitions. [2022-11-02 20:55:56,428 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 359 transitions. Word has length 86 [2022-11-02 20:55:56,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:56,429 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 359 transitions. [2022-11-02 20:55:56,429 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 20:55:56,429 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 359 transitions. [2022-11-02 20:55:56,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-02 20:55:56,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:56,431 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 20:55:56,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:56,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:55:56,647 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:56,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:56,647 INFO L85 PathProgramCache]: Analyzing trace with hash -806881120, now seen corresponding path program 1 times [2022-11-02 20:55:56,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:55:56,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1447963660] [2022-11-02 20:55:56,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:56,648 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:55:56,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:55:56,649 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:55:56,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-02 20:55:56,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:56,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-02 20:55:56,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:16,530 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 20:56:16,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:38,525 INFO L356 Elim1Store]: treesize reduction 17, result has 82.8 percent of original size [2022-11-02 20:56:38,526 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 20:56:39,235 INFO L356 Elim1Store]: treesize reduction 8, result has 88.1 percent of original size [2022-11-02 20:56:39,236 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 20:56:45,450 INFO L356 Elim1Store]: treesize reduction 17, result has 82.8 percent of original size [2022-11-02 20:56:45,450 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 20:56:45,981 INFO L356 Elim1Store]: treesize reduction 8, result has 88.1 percent of original size [2022-11-02 20:56:45,981 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 20:56:47,575 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 20:56:47,576 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:56:47,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1447963660] [2022-11-02 20:56:47,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1447963660] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:56:47,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:56:47,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21] total 41 [2022-11-02 20:56:47,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510992922] [2022-11-02 20:56:47,577 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:56:47,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-02 20:56:47,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:56:47,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-02 20:56:47,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1482, Unknown=7, NotChecked=0, Total=1640 [2022-11-02 20:56:47,579 INFO L87 Difference]: Start difference. First operand 283 states and 359 transitions. Second operand has 41 states, 38 states have (on average 3.3684210526315788) internal successors, (128), 33 states have internal predecessors, (128), 11 states have call successors, (19), 4 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 20:56:58,817 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 20:57:05,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:57:07,550 WARN L539 Checker$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 20:57:09,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:57:11,639 WARN L539 Checker$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 20:57:33,721 WARN L234 SmtUtils]: Spent 20.46s 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 20:57:41,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:57:43,857 WARN L539 Checker$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 20:57:49,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:49,492 INFO L93 Difference]: Finished difference Result 690 states and 957 transitions. [2022-11-02 20:57:49,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-02 20:57:49,494 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 3.3684210526315788) internal successors, (128), 33 states have internal predecessors, (128), 11 states have call successors, (19), 4 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 20:57:49,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:49,498 INFO L225 Difference]: With dead ends: 690 [2022-11-02 20:57:49,498 INFO L226 Difference]: Without dead ends: 598 [2022-11-02 20:57:49,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 72.7s TimeCoverageRelationStatistics Valid=418, Invalid=3858, Unknown=14, NotChecked=0, Total=4290 [2022-11-02 20:57:49,501 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 230 mSDsluCounter, 1787 mSDsCounter, 0 mSdLazyCounter, 1434 mSolverCounterSat, 81 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 1902 SdHoareTripleChecker+Invalid, 2279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1434 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 757 IncrementalHoareTripleChecker+Unchecked, 21.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:49,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 1902 Invalid, 2279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1434 Invalid, 7 Unknown, 757 Unchecked, 21.0s Time] [2022-11-02 20:57:49,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-11-02 20:57:49,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 458. [2022-11-02 20:57:49,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 352 states have (on average 1.1875) internal successors, (418), 363 states have internal predecessors, (418), 60 states have call successors, (60), 29 states have call predecessors, (60), 45 states have return successors, (137), 65 states have call predecessors, (137), 59 states have call successors, (137) [2022-11-02 20:57:49,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 615 transitions. [2022-11-02 20:57:49,619 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 615 transitions. Word has length 97 [2022-11-02 20:57:49,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:49,619 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 615 transitions. [2022-11-02 20:57:49,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 3.3684210526315788) internal successors, (128), 33 states have internal predecessors, (128), 11 states have call successors, (19), 4 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 20:57:49,620 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 615 transitions. [2022-11-02 20:57:49,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-02 20:57:49,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:49,622 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 20:57:49,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:57:49,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:57:49,839 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:57:49,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:49,839 INFO L85 PathProgramCache]: Analyzing trace with hash -838641764, now seen corresponding path program 1 times [2022-11-02 20:57:49,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:57:49,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1731432715] [2022-11-02 20:57:49,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:49,840 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:57:49,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:57:49,841 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:57:49,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-02 20:57:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:50,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 20:57:50,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:57:51,262 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 20:57:51,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:57:51,262 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:57:51,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1731432715] [2022-11-02 20:57:51,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1731432715] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:57:51,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:57:51,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-02 20:57:51,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781641306] [2022-11-02 20:57:51,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:57:51,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:57:51,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:57:51,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:57:51,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:57:51,268 INFO L87 Difference]: Start difference. First operand 458 states and 615 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 20:57:52,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:52,276 INFO L93 Difference]: Finished difference Result 783 states and 1117 transitions. [2022-11-02 20:57:52,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:57:52,277 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 20:57:52,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:52,281 INFO L225 Difference]: With dead ends: 783 [2022-11-02 20:57:52,281 INFO L226 Difference]: Without dead ends: 483 [2022-11-02 20:57:52,283 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 20:57:52,283 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 58 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:52,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 603 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 135 Invalid, 0 Unknown, 122 Unchecked, 0.5s Time] [2022-11-02 20:57:52,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-11-02 20:57:52,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 466. [2022-11-02 20:57:52,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 360 states have (on average 1.1805555555555556) internal successors, (425), 371 states have internal predecessors, (425), 60 states have call successors, (60), 29 states have call predecessors, (60), 45 states have return successors, (137), 65 states have call predecessors, (137), 59 states have call successors, (137) [2022-11-02 20:57:52,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 622 transitions. [2022-11-02 20:57:52,408 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 622 transitions. Word has length 97 [2022-11-02 20:57:52,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:52,408 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 622 transitions. [2022-11-02 20:57:52,409 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 20:57:52,409 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 622 transitions. [2022-11-02 20:57:52,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-02 20:57:52,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:52,411 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 20:57:52,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:57:52,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:57:52,626 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:57:52,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:52,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1295849576, now seen corresponding path program 1 times [2022-11-02 20:57:52,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:57:52,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1455363090] [2022-11-02 20:57:52,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:52,628 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:57:52,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:57:52,629 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:57:52,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-02 20:57:52,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:52,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 20:57:52,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:57:53,042 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 20:57:53,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:57:53,465 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 20:57:53,465 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:57:53,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1455363090] [2022-11-02 20:57:53,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1455363090] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:57:53,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:57:53,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-02 20:57:53,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131756957] [2022-11-02 20:57:53,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:57:53,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:57:53,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:57:53,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:57:53,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:57:53,468 INFO L87 Difference]: Start difference. First operand 466 states and 622 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 20:57:54,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:54,114 INFO L93 Difference]: Finished difference Result 883 states and 1206 transitions. [2022-11-02 20:57:54,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:57:54,115 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 20:57:54,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:54,118 INFO L225 Difference]: With dead ends: 883 [2022-11-02 20:57:54,118 INFO L226 Difference]: Without dead ends: 553 [2022-11-02 20:57:54,120 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 20:57:54,120 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 71 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:54,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 589 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:57:54,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-11-02 20:57:54,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 431. [2022-11-02 20:57:54,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 339 states have (on average 1.2123893805309736) internal successors, (411), 351 states have internal predecessors, (411), 49 states have call successors, (49), 24 states have call predecessors, (49), 42 states have return successors, (113), 55 states have call predecessors, (113), 48 states have call successors, (113) [2022-11-02 20:57:54,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 573 transitions. [2022-11-02 20:57:54,233 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 573 transitions. Word has length 97 [2022-11-02 20:57:54,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:54,234 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 573 transitions. [2022-11-02 20:57:54,234 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 20:57:54,234 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 573 transitions. [2022-11-02 20:57:54,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-02 20:57:54,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:54,236 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 20:57:54,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-02 20:57:54,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:57:54,450 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:57:54,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:54,451 INFO L85 PathProgramCache]: Analyzing trace with hash -695722547, now seen corresponding path program 1 times [2022-11-02 20:57:54,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:57:54,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [466485796] [2022-11-02 20:57:54,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:54,452 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:57:54,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:57:54,453 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:57:54,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-02 20:57:54,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:54,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 20:57:54,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:57:55,249 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 20:57:55,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:57:55,988 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-02 20:57:55,989 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 20:57:56,111 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 20:57:56,111 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:57:56,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [466485796] [2022-11-02 20:57:56,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [466485796] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:57:56,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:57:56,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2022-11-02 20:57:56,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585041558] [2022-11-02 20:57:56,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:57:56,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:57:56,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:57:56,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:57:56,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:57:56,114 INFO L87 Difference]: Start difference. First operand 431 states and 573 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 20:57:57,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:57,264 INFO L93 Difference]: Finished difference Result 787 states and 1109 transitions. [2022-11-02 20:57:57,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:57:57,266 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 20:57:57,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:57,269 INFO L225 Difference]: With dead ends: 787 [2022-11-02 20:57:57,269 INFO L226 Difference]: Without dead ends: 530 [2022-11-02 20:57:57,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-11-02 20:57:57,272 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 34 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:57,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 599 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 127 Invalid, 0 Unknown, 112 Unchecked, 0.5s Time] [2022-11-02 20:57:57,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2022-11-02 20:57:57,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 449. [2022-11-02 20:57:57,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 355 states have (on average 1.2169014084507042) internal successors, (432), 363 states have internal predecessors, (432), 49 states have call successors, (49), 24 states have call predecessors, (49), 44 states have return successors, (122), 61 states have call predecessors, (122), 48 states have call successors, (122) [2022-11-02 20:57:57,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 603 transitions. [2022-11-02 20:57:57,408 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 603 transitions. Word has length 94 [2022-11-02 20:57:57,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:57,409 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 603 transitions. [2022-11-02 20:57:57,409 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 20:57:57,409 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 603 transitions. [2022-11-02 20:57:57,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-02 20:57:57,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:57,411 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 20:57:57,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-02 20:57:57,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:57:57,626 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:57:57,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:57,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1176802805, now seen corresponding path program 1 times [2022-11-02 20:57:57,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:57:57,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084847144] [2022-11-02 20:57:57,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:57,628 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:57:57,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:57:57,628 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:57:57,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-02 20:57:57,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:57,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:57:57,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:57:57,894 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 20:57:57,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:57:57,895 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:57:57,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084847144] [2022-11-02 20:57:57,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084847144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:57:57,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:57:57,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:57:57,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181725075] [2022-11-02 20:57:57,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:57:57,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:57:57,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:57:57,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:57:57,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:57:57,897 INFO L87 Difference]: Start difference. First operand 449 states and 603 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 20:57:58,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:58,020 INFO L93 Difference]: Finished difference Result 740 states and 1034 transitions. [2022-11-02 20:57:58,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:57:58,021 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 20:57:58,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:58,023 INFO L225 Difference]: With dead ends: 740 [2022-11-02 20:57:58,024 INFO L226 Difference]: Without dead ends: 439 [2022-11-02 20:57:58,026 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 20:57:58,027 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 0 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:58,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 317 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:57:58,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-11-02 20:57:58,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 433. [2022-11-02 20:57:58,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 340 states have (on average 1.1705882352941177) internal successors, (398), 349 states have internal predecessors, (398), 49 states have call successors, (49), 24 states have call predecessors, (49), 43 states have return successors, (117), 59 states have call predecessors, (117), 48 states have call successors, (117) [2022-11-02 20:57:58,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 564 transitions. [2022-11-02 20:57:58,133 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 564 transitions. Word has length 94 [2022-11-02 20:57:58,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:58,134 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 564 transitions. [2022-11-02 20:57:58,134 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 20:57:58,134 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 564 transitions. [2022-11-02 20:57:58,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-02 20:57:58,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:58,136 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 20:57:58,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-02 20:57:58,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:57:58,350 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:57:58,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:58,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1850898618, now seen corresponding path program 2 times [2022-11-02 20:57:58,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:57:58,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [119580768] [2022-11-02 20:57:58,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:57:58,352 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:57:58,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:57:58,352 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:57:58,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-02 20:57:58,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:57:58,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:57:58,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-02 20:57:58,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:57:58,828 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 20:57:58,832 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 20:58:00,278 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 20:58:00,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:58:00,278 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:58:00,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [119580768] [2022-11-02 20:58:00,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [119580768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:58:00,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:58:00,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-02 20:58:00,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717471382] [2022-11-02 20:58:00,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:58:00,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:58:00,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:58:00,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:58:00,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:58:00,280 INFO L87 Difference]: Start difference. First operand 433 states and 564 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-02 20:58:00,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:58:00,721 INFO L93 Difference]: Finished difference Result 687 states and 889 transitions. [2022-11-02 20:58:00,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:58:00,722 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 95 [2022-11-02 20:58:00,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:58:00,725 INFO L225 Difference]: With dead ends: 687 [2022-11-02 20:58:00,726 INFO L226 Difference]: Without dead ends: 571 [2022-11-02 20:58:00,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 78 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:58:00,727 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 31 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:58:00,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 415 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 92 Unchecked, 0.2s Time] [2022-11-02 20:58:00,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-11-02 20:58:00,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 525. [2022-11-02 20:58:00,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 414 states have (on average 1.1618357487922706) internal successors, (481), 424 states have internal predecessors, (481), 58 states have call successors, (58), 29 states have call predecessors, (58), 52 states have return successors, (133), 71 states have call predecessors, (133), 57 states have call successors, (133) [2022-11-02 20:58:00,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 672 transitions. [2022-11-02 20:58:00,871 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 672 transitions. Word has length 95 [2022-11-02 20:58:00,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:58:00,871 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 672 transitions. [2022-11-02 20:58:00,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-02 20:58:00,872 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 672 transitions. [2022-11-02 20:58:00,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-02 20:58:00,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:58:00,874 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 20:58:00,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-11-02 20:58:01,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:58:01,093 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:58:01,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:01,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1716037046, now seen corresponding path program 3 times [2022-11-02 20:58:01,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:58:01,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [856564125] [2022-11-02 20:58:01,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:58:01,094 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:58:01,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:58:01,095 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:58:01,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-02 20:58:01,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:58:01,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:58:01,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:58:01,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:58:01,298 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 20:58:01,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:58:01,298 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:58:01,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [856564125] [2022-11-02 20:58:01,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [856564125] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:58:01,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:58:01,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:58:01,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158939548] [2022-11-02 20:58:01,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:58:01,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:58:01,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:58:01,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:58:01,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:58:01,300 INFO L87 Difference]: Start difference. First operand 525 states and 672 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 20:58:01,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:58:01,444 INFO L93 Difference]: Finished difference Result 698 states and 887 transitions. [2022-11-02 20:58:01,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:58:01,445 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 20:58:01,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:58:01,448 INFO L225 Difference]: With dead ends: 698 [2022-11-02 20:58:01,448 INFO L226 Difference]: Without dead ends: 524 [2022-11-02 20:58:01,449 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 20:58:01,449 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 2 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:58:01,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 366 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:58:01,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-11-02 20:58:01,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 516. [2022-11-02 20:58:01,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 405 states have (on average 1.162962962962963) internal successors, (471), 416 states have internal predecessors, (471), 58 states have call successors, (58), 28 states have call predecessors, (58), 52 states have return successors, (131), 71 states have call predecessors, (131), 57 states have call successors, (131) [2022-11-02 20:58:01,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 660 transitions. [2022-11-02 20:58:01,592 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 660 transitions. Word has length 95 [2022-11-02 20:58:01,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:58:01,592 INFO L495 AbstractCegarLoop]: Abstraction has 516 states and 660 transitions. [2022-11-02 20:58:01,592 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 20:58:01,592 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 660 transitions. [2022-11-02 20:58:01,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-02 20:58:01,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:58:01,596 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 20:58:01,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-02 20:58:01,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:58:01,812 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:58:01,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:01,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1020688030, now seen corresponding path program 1 times [2022-11-02 20:58:01,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:58:01,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411868741] [2022-11-02 20:58:01,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:01,813 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:58:01,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:58:01,814 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:58:01,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-02 20:58:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:02,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:58:02,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:58:02,259 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 20:58:02,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:58:02,259 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:58:02,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411868741] [2022-11-02 20:58:02,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411868741] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:58:02,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:58:02,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 20:58:02,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104931219] [2022-11-02 20:58:02,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:58:02,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:58:02,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:58:02,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:58:02,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:58:02,262 INFO L87 Difference]: Start difference. First operand 516 states and 660 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 20:58:02,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:58:02,886 INFO L93 Difference]: Finished difference Result 895 states and 1178 transitions. [2022-11-02 20:58:02,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:58:02,887 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 20:58:02,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:58:02,890 INFO L225 Difference]: With dead ends: 895 [2022-11-02 20:58:02,890 INFO L226 Difference]: Without dead ends: 487 [2022-11-02 20:58:02,892 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 20:58:02,892 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 66 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:58:02,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 464 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:58:02,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-11-02 20:58:03,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 450. [2022-11-02 20:58:03,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 350 states have (on average 1.1257142857142857) internal successors, (394), 362 states have internal predecessors, (394), 55 states have call successors, (55), 28 states have call predecessors, (55), 44 states have return successors, (99), 59 states have call predecessors, (99), 54 states have call successors, (99) [2022-11-02 20:58:03,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 548 transitions. [2022-11-02 20:58:03,011 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 548 transitions. Word has length 99 [2022-11-02 20:58:03,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:58:03,011 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 548 transitions. [2022-11-02 20:58:03,012 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 20:58:03,012 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 548 transitions. [2022-11-02 20:58:03,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-02 20:58:03,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:58:03,014 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 20:58:03,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-02 20:58:03,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:58:03,233 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:58:03,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:03,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1870368, now seen corresponding path program 1 times [2022-11-02 20:58:03,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:58:03,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [954831719] [2022-11-02 20:58:03,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:03,234 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:58:03,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:58:03,235 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:58:03,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c52c300-6a1a-4a05-817b-1d86ba5b8f5c/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-02 20:58:03,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:03,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-02 20:58:03,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:58:28,678 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 65 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:58:28,678 INFO L328 TraceCheckSpWp]: Computing backward predicates...