./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa --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 e96d8d92db1667c6f6142560a7fad2417327f7e06eb532366f9ad7d4ddd7d1f5 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:05:22,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:05:22,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:05:22,733 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:05:22,733 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:05:22,734 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:05:22,736 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:05:22,737 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:05:22,739 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:05:22,740 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:05:22,741 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:05:22,742 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:05:22,742 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:05:22,743 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:05:22,744 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:05:22,745 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:05:22,746 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:05:22,746 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:05:22,748 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:05:22,750 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:05:22,751 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:05:22,753 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:05:22,754 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:05:22,755 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:05:22,757 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:05:22,758 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:05:22,758 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:05:22,759 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:05:22,759 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:05:22,760 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:05:22,760 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:05:22,761 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:05:22,761 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:05:22,762 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:05:22,763 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:05:22,763 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:05:22,764 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:05:22,764 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:05:22,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:05:22,764 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:05:22,765 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:05:22,766 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-06 17:05:22,784 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:05:22,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:05:22,784 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:05:22,784 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:05:22,785 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:05:22,785 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:05:22,785 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:05:22,786 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:05:22,786 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:05:22,786 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:05:22,786 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:05:22,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:05:22,786 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:05:22,786 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:05:22,787 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:05:22,787 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:05:22,787 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:05:22,787 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:05:22,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:05:22,787 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:05:22,787 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:05:22,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:05:22,794 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:05:22,794 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:05:22,795 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:05:22,795 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:05:22,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:05:22,795 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:05:22,795 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:05:22,795 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:05:22,796 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:05:22,796 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_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e96d8d92db1667c6f6142560a7fad2417327f7e06eb532366f9ad7d4ddd7d1f5 [2021-12-06 17:05:22,998 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:05:23,014 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:05:23,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:05:23,018 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:05:23,019 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:05:23,020 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i [2021-12-06 17:05:23,066 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/data/c46132752/ceba17a50bd446a498461d485132bc87/FLAG629587d5b [2021-12-06 17:05:23,604 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:05:23,604 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i [2021-12-06 17:05:23,632 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/data/c46132752/ceba17a50bd446a498461d485132bc87/FLAG629587d5b [2021-12-06 17:05:24,094 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/data/c46132752/ceba17a50bd446a498461d485132bc87 [2021-12-06 17:05:24,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:05:24,097 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:05:24,098 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:05:24,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:05:24,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:05:24,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:05:24" (1/1) ... [2021-12-06 17:05:24,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77b7963a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:05:24, skipping insertion in model container [2021-12-06 17:05:24,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:05:24" (1/1) ... [2021-12-06 17:05:24,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:05:24,181 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:05:24,331 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_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4500,4513] [2021-12-06 17:05:24,335 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_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4560,4573] [2021-12-06 17:05:24,818 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 17:05:24,819 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 17:05:24,819 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 17:05:24,820 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 17:05:24,821 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 17:05:24,831 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 17:05:24,831 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 17:05:24,833 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 17:05:24,833 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 17:05:24,835 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 17:05:24,836 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 17:05:24,836 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 17:05:24,837 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 17:05:25,086 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-06 17:05:25,087 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-06 17:05:25,088 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-06 17:05:25,089 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-06 17:05:25,090 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-06 17:05:25,090 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-06 17:05:25,091 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-06 17:05:25,092 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-06 17:05:25,092 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-06 17:05:25,093 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-06 17:05:25,191 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-06 17:05:25,206 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:05:25,218 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:05:25,228 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_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4500,4513] [2021-12-06 17:05:25,228 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_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness-1.i[4560,4573] [2021-12-06 17:05:25,257 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 17:05:25,258 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 17:05:25,258 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 17:05:25,259 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 17:05:25,259 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 17:05:25,265 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 17:05:25,265 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 17:05:25,266 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 17:05:25,267 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 17:05:25,268 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 17:05:25,268 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 17:05:25,268 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 17:05:25,269 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 17:05:25,294 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-06 17:05:25,295 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-06 17:05:25,295 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-06 17:05:25,296 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-06 17:05:25,297 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-06 17:05:25,297 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-06 17:05:25,298 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-06 17:05:25,298 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-06 17:05:25,299 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-06 17:05:25,299 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-06 17:05:25,326 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-06 17:05:25,338 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:05:25,516 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:05:25,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:05:25 WrapperNode [2021-12-06 17:05:25,517 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:05:25,518 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:05:25,518 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:05:25,518 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:05:25,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:05:25" (1/1) ... [2021-12-06 17:05:25,580 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:05:25" (1/1) ... [2021-12-06 17:05:25,611 INFO L137 Inliner]: procedures = 679, calls = 1032, calls flagged for inlining = 48, calls inlined = 3, statements flattened = 29 [2021-12-06 17:05:25,612 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:05:25,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:05:25,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:05:25,613 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:05:25,621 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:05:25" (1/1) ... [2021-12-06 17:05:25,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:05:25" (1/1) ... [2021-12-06 17:05:25,625 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:05:25" (1/1) ... [2021-12-06 17:05:25,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:05:25" (1/1) ... [2021-12-06 17:05:25,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:05:25" (1/1) ... [2021-12-06 17:05:25,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:05:25" (1/1) ... [2021-12-06 17:05:25,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:05:25" (1/1) ... [2021-12-06 17:05:25,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:05:25,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:05:25,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:05:25,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:05:25,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:05:25" (1/1) ... [2021-12-06 17:05:25,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:05:25,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:05:25,679 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:05:25,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:05:25,718 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_reset [2021-12-06 17:05:25,718 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_reset [2021-12-06 17:05:25,718 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-12-06 17:05:25,718 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-12-06 17:05:25,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 17:05:25,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 17:05:25,718 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 17:05:25,718 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 17:05:25,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:05:25,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:05:25,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:05:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-06 17:05:25,719 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-06 17:05:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-06 17:05:25,719 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-06 17:05:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 17:05:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 17:05:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 17:05:25,864 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:05:25,866 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:05:25,979 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:05:25,985 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:05:25,985 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-06 17:05:25,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:05:25 BoogieIcfgContainer [2021-12-06 17:05:25,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:05:25,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:05:25,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:05:25,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:05:25,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:05:24" (1/3) ... [2021-12-06 17:05:25,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68b6f9d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:05:25, skipping insertion in model container [2021-12-06 17:05:25,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:05:25" (2/3) ... [2021-12-06 17:05:25,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68b6f9d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:05:25, skipping insertion in model container [2021-12-06 17:05:25,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:05:25" (3/3) ... [2021-12-06 17:05:25,994 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_node_reset_harness-1.i [2021-12-06 17:05:25,999 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:05:25,999 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 17:05:26,033 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:05:26,038 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 17:05:26,038 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 17:05:26,051 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-06 17:05:26,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 17:05:26,054 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:05:26,055 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:05:26,055 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:05:26,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:05:26,059 INFO L85 PathProgramCache]: Analyzing trace with hash -527313499, now seen corresponding path program 1 times [2021-12-06 17:05:26,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:05:26,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759635812] [2021-12-06 17:05:26,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:05:26,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:05:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:26,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:05:26,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:26,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 17:05:26,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:26,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:05:26,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:05:26,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759635812] [2021-12-06 17:05:26,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759635812] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:05:26,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:05:26,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:05:26,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282467716] [2021-12-06 17:05:26,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:05:26,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 17:05:26,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:05:26,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 17:05:26,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 17:05:26,383 INFO L87 Difference]: Start difference. First operand has 41 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 17:05:26,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:05:26,398 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2021-12-06 17:05:26,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 17:05:26,400 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-12-06 17:05:26,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:05:26,407 INFO L225 Difference]: With dead ends: 75 [2021-12-06 17:05:26,407 INFO L226 Difference]: Without dead ends: 36 [2021-12-06 17:05:26,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 17:05:26,414 INFO L933 BasicCegarLoop]: 45 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, 45 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 [2021-12-06 17:05:26,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:05:26,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-06 17:05:26,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-12-06 17:05:26,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 17:05:26,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-12-06 17:05:26,449 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 20 [2021-12-06 17:05:26,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:05:26,450 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-12-06 17:05:26,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 17:05:26,450 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-12-06 17:05:26,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 17:05:26,451 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:05:26,451 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:05:26,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 17:05:26,452 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:05:26,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:05:26,452 INFO L85 PathProgramCache]: Analyzing trace with hash 74286250, now seen corresponding path program 1 times [2021-12-06 17:05:26,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:05:26,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485132847] [2021-12-06 17:05:26,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:05:26,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:05:26,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:26,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:05:26,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:26,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 17:05:26,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:26,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 17:05:26,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:26,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:05:26,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:05:26,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485132847] [2021-12-06 17:05:26,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485132847] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:05:26,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:05:26,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:05:26,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752219687] [2021-12-06 17:05:26,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:05:26,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:05:26,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:05:26,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:05:26,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:05:26,632 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 17:05:26,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:05:26,724 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2021-12-06 17:05:26,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:05:26,724 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-12-06 17:05:26,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:05:26,725 INFO L225 Difference]: With dead ends: 61 [2021-12-06 17:05:26,725 INFO L226 Difference]: Without dead ends: 37 [2021-12-06 17:05:26,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:05:26,727 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 22 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:05:26,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 84 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:05:26,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-06 17:05:26,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-12-06 17:05:26,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 17:05:26,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-12-06 17:05:26,734 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 26 [2021-12-06 17:05:26,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:05:26,734 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-12-06 17:05:26,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 17:05:26,734 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-12-06 17:05:26,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 17:05:26,735 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:05:26,735 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:05:26,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 17:05:26,735 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:05:26,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:05:26,736 INFO L85 PathProgramCache]: Analyzing trace with hash -2047649194, now seen corresponding path program 1 times [2021-12-06 17:05:26,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:05:26,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118063916] [2021-12-06 17:05:26,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:05:26,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:05:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:26,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:05:26,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:26,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 17:05:26,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:26,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 17:05:26,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:26,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:05:26,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:05:26,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118063916] [2021-12-06 17:05:26,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118063916] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:05:26,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138596500] [2021-12-06 17:05:26,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:05:26,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:05:26,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:05:26,936 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:05:26,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 17:05:27,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:27,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 17:05:27,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:05:27,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 17:05:27,743 WARN L322 ript$VariableManager]: TermVariabe |aux_div_v_#Ultimate.C_memset_#t~loopctr676_5_65| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:05:27,744 WARN L322 ript$VariableManager]: TermVariabe |aux_mod_v_#Ultimate.C_memset_#t~loopctr676_5_65| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:05:27,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:05:27,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:05:28,133 INFO L388 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 14 treesize of output 12 [2021-12-06 17:05:28,137 INFO L388 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 26 treesize of output 24 [2021-12-06 17:05:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:05:28,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138596500] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:05:28,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:05:28,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 8] total 18 [2021-12-06 17:05:28,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865288062] [2021-12-06 17:05:28,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:05:28,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 17:05:28,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:05:28,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 17:05:28,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-12-06 17:05:28,185 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 17:05:28,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:05:28,550 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2021-12-06 17:05:28,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:05:28,551 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 27 [2021-12-06 17:05:28,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:05:28,553 INFO L225 Difference]: With dead ends: 70 [2021-12-06 17:05:28,553 INFO L226 Difference]: Without dead ends: 46 [2021-12-06 17:05:28,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-12-06 17:05:28,554 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:05:28,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 187 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 205 Invalid, 0 Unknown, 98 Unchecked, 0.2s Time] [2021-12-06 17:05:28,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-06 17:05:28,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 38. [2021-12-06 17:05:28,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 17:05:28,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-12-06 17:05:28,564 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2021-12-06 17:05:28,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:05:28,564 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-12-06 17:05:28,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 17:05:28,565 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-12-06 17:05:28,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 17:05:28,566 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:05:28,566 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 17:05:28,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:05:28,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:05:28,768 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:05:28,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:05:28,769 INFO L85 PathProgramCache]: Analyzing trace with hash 891828778, now seen corresponding path program 2 times [2021-12-06 17:05:28,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:05:28,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527845933] [2021-12-06 17:05:28,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:05:28,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:05:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:28,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:05:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:28,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 17:05:28,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:29,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 17:05:29,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:29,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:05:29,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:05:29,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527845933] [2021-12-06 17:05:29,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527845933] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:05:29,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060625893] [2021-12-06 17:05:29,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:05:29,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:05:29,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:05:29,018 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:05:29,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 17:05:29,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:05:29,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:05:29,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 17:05:29,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:05:29,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 17:05:29,160 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-12-06 17:05:29,160 INFO L388 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 1 case distinctions, treesize of input 31 treesize of output 30 [2021-12-06 17:05:29,836 WARN L322 ript$VariableManager]: TermVariabe |aux_mod_v_#Ultimate.C_memset_#t~loopctr676_13_91| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:05:29,836 WARN L322 ript$VariableManager]: TermVariabe |aux_div_v_#Ultimate.C_memset_#t~loopctr676_13_91| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:05:29,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:05:29,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:05:30,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 17:05:30,274 INFO L388 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 20 treesize of output 18 [2021-12-06 17:05:30,278 INFO L388 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 148 treesize of output 144 [2021-12-06 17:05:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:05:30,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060625893] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:05:30,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:05:30,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 9] total 21 [2021-12-06 17:05:30,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442031671] [2021-12-06 17:05:30,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:05:30,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 17:05:30,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:05:30,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 17:05:30,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-12-06 17:05:30,362 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 17:05:30,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:05:30,763 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2021-12-06 17:05:30,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 17:05:30,764 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 28 [2021-12-06 17:05:30,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:05:30,764 INFO L225 Difference]: With dead ends: 71 [2021-12-06 17:05:30,765 INFO L226 Difference]: Without dead ends: 47 [2021-12-06 17:05:30,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-12-06 17:05:30,766 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:05:30,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 224 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 214 Invalid, 0 Unknown, 164 Unchecked, 0.2s Time] [2021-12-06 17:05:30,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-06 17:05:30,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2021-12-06 17:05:30,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 17:05:30,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-12-06 17:05:30,772 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 28 [2021-12-06 17:05:30,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:05:30,772 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-12-06 17:05:30,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 17:05:30,773 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-12-06 17:05:30,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 17:05:30,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:05:30,774 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 17:05:30,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 17:05:30,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:05:30,977 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:05:30,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:05:30,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1821332694, now seen corresponding path program 3 times [2021-12-06 17:05:30,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:05:30,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866800178] [2021-12-06 17:05:30,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:05:30,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:05:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:31,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:05:31,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:31,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 17:05:31,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:31,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 17:05:31,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:31,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:05:31,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:05:31,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866800178] [2021-12-06 17:05:31,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866800178] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:05:31,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36702858] [2021-12-06 17:05:31,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:05:31,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:05:31,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:05:31,219 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:05:31,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 17:05:31,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 17:05:31,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:05:31,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 17:05:31,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:05:31,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 17:05:31,457 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-12-06 17:05:31,457 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:05:31,518 INFO L354 Elim1Store]: treesize reduction 112, result has 19.4 percent of original size [2021-12-06 17:05:31,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-12-06 17:05:34,257 WARN L322 ript$VariableManager]: TermVariabe |aux_mod_v_#Ultimate.C_memset_#t~loopctr676_24_91| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:05:34,257 WARN L322 ript$VariableManager]: TermVariabe |aux_div_v_#Ultimate.C_memset_#t~loopctr676_24_91| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:05:34,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:05:34,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:05:34,768 INFO L388 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 26 treesize of output 24 [2021-12-06 17:05:34,771 INFO L388 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 146 treesize of output 144 [2021-12-06 17:05:34,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:05:34,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36702858] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:05:34,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:05:34,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 10] total 24 [2021-12-06 17:05:34,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240927552] [2021-12-06 17:05:34,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:05:34,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 17:05:34,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:05:34,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 17:05:34,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=470, Unknown=1, NotChecked=0, Total=552 [2021-12-06 17:05:34,846 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 22 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 17:05:35,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:05:35,326 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2021-12-06 17:05:35,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 17:05:35,327 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 22 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 29 [2021-12-06 17:05:35,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:05:35,328 INFO L225 Difference]: With dead ends: 72 [2021-12-06 17:05:35,328 INFO L226 Difference]: Without dead ends: 48 [2021-12-06 17:05:35,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=121, Invalid=748, Unknown=1, NotChecked=0, Total=870 [2021-12-06 17:05:35,329 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 29 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:05:35,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 190 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 286 Invalid, 0 Unknown, 79 Unchecked, 0.3s Time] [2021-12-06 17:05:35,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-06 17:05:35,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-12-06 17:05:35,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-06 17:05:35,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-12-06 17:05:35,335 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 29 [2021-12-06 17:05:35,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:05:35,335 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-12-06 17:05:35,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 22 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 17:05:35,336 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-12-06 17:05:35,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 17:05:35,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:05:35,336 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:05:35,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 17:05:35,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:05:35,538 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:05:35,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:05:35,539 INFO L85 PathProgramCache]: Analyzing trace with hash -996879181, now seen corresponding path program 1 times [2021-12-06 17:05:35,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:05:35,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572308829] [2021-12-06 17:05:35,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:05:35,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:05:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:35,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:05:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:35,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 17:05:35,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:35,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 17:05:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:35,719 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 17:05:35,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:05:35,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572308829] [2021-12-06 17:05:35,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572308829] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:05:35,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:05:35,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 17:05:35,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402463055] [2021-12-06 17:05:35,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:05:35,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:05:35,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:05:35,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:05:35,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:05:35,722 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 17:05:35,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:05:35,807 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2021-12-06 17:05:35,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:05:35,808 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2021-12-06 17:05:35,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:05:35,809 INFO L225 Difference]: With dead ends: 54 [2021-12-06 17:05:35,809 INFO L226 Difference]: Without dead ends: 52 [2021-12-06 17:05:35,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:05:35,810 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 26 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:05:35,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 134 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:05:35,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-06 17:05:35,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-12-06 17:05:35,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 37 states have internal predecessors, (40), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 17:05:35,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2021-12-06 17:05:35,816 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 30 [2021-12-06 17:05:35,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:05:35,816 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2021-12-06 17:05:35,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 17:05:35,816 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2021-12-06 17:05:35,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 17:05:35,817 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:05:35,817 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-12-06 17:05:35,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 17:05:35,818 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:05:35,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:05:35,818 INFO L85 PathProgramCache]: Analyzing trace with hash 508754072, now seen corresponding path program 1 times [2021-12-06 17:05:35,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:05:35,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807175418] [2021-12-06 17:05:35,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:05:35,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:05:35,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:35,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:05:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:35,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 17:05:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:36,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 17:05:36,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:36,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:05:36,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:05:36,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807175418] [2021-12-06 17:05:36,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807175418] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:05:36,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526493101] [2021-12-06 17:05:36,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:05:36,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:05:36,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:05:36,018 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:05:36,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 17:05:36,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:36,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 17:05:36,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:05:36,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 17:05:36,189 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-12-06 17:05:36,189 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:05:36,227 INFO L354 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2021-12-06 17:05:36,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-12-06 17:05:36,264 INFO L354 Elim1Store]: treesize reduction 72, result has 22.6 percent of original size [2021-12-06 17:05:36,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2021-12-06 17:05:38,698 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:05:38,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:05:39,353 INFO L388 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 34 treesize of output 32 [2021-12-06 17:05:39,356 INFO L388 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 772 treesize of output 764 [2021-12-06 17:05:39,541 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:05:39,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526493101] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:05:39,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:05:39,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 12] total 29 [2021-12-06 17:05:39,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61368778] [2021-12-06 17:05:39,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:05:39,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 17:05:39,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:05:39,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 17:05:39,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=718, Unknown=1, NotChecked=0, Total=812 [2021-12-06 17:05:39,543 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 27 states have internal predecessors, (56), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 17:05:40,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:05:40,156 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2021-12-06 17:05:40,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 17:05:40,157 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 27 states have internal predecessors, (56), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 33 [2021-12-06 17:05:40,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:05:40,157 INFO L225 Difference]: With dead ends: 96 [2021-12-06 17:05:40,158 INFO L226 Difference]: Without dead ends: 61 [2021-12-06 17:05:40,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=164, Invalid=1317, Unknown=1, NotChecked=0, Total=1482 [2021-12-06 17:05:40,159 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 32 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:05:40,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 206 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 349 Invalid, 0 Unknown, 164 Unchecked, 0.3s Time] [2021-12-06 17:05:40,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-06 17:05:40,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2021-12-06 17:05:40,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 41 states have internal predecessors, (46), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 17:05:40,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-12-06 17:05:40,166 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 33 [2021-12-06 17:05:40,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:05:40,166 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-12-06 17:05:40,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 27 states have internal predecessors, (56), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 17:05:40,166 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-12-06 17:05:40,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 17:05:40,167 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:05:40,167 INFO L514 BasicCegarLoop]: trace histogram [5, 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] [2021-12-06 17:05:40,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 17:05:40,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 17:05:40,369 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:05:40,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:05:40,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1979289706, now seen corresponding path program 2 times [2021-12-06 17:05:40,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:05:40,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284012634] [2021-12-06 17:05:40,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:05:40,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:05:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:40,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:05:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:40,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 17:05:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:40,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 17:05:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:40,617 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 17:05:40,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:05:40,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284012634] [2021-12-06 17:05:40,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284012634] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:05:40,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651786762] [2021-12-06 17:05:40,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:05:40,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:05:40,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:05:40,618 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:05:40,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 17:05:40,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:05:40,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:05:40,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-06 17:05:40,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:05:40,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 17:05:40,817 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-12-06 17:05:40,817 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:05:40,860 INFO L354 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2021-12-06 17:05:40,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-12-06 17:05:40,914 INFO L354 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2021-12-06 17:05:40,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2021-12-06 17:05:40,970 INFO L354 Elim1Store]: treesize reduction 200, result has 17.0 percent of original size [2021-12-06 17:05:40,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 62 [2021-12-06 17:05:43,773 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:05:43,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:05:44,445 INFO L388 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 34 treesize of output 32 [2021-12-06 17:05:44,704 INFO L388 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 40 treesize of output 38 [2021-12-06 17:05:44,707 INFO L388 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 780 treesize of output 776 [2021-12-06 17:05:44,797 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:05:44,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651786762] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:05:44,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:05:44,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 14] total 34 [2021-12-06 17:05:44,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584035246] [2021-12-06 17:05:44,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:05:44,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 17:05:44,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:05:44,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 17:05:44,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=988, Unknown=1, NotChecked=0, Total=1122 [2021-12-06 17:05:44,799 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 32 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 17:05:45,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:05:45,880 INFO L93 Difference]: Finished difference Result 103 states and 125 transitions. [2021-12-06 17:05:45,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 17:05:45,881 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 32 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 37 [2021-12-06 17:05:45,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:05:45,882 INFO L225 Difference]: With dead ends: 103 [2021-12-06 17:05:45,882 INFO L226 Difference]: Without dead ends: 65 [2021-12-06 17:05:45,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=227, Invalid=1842, Unknown=1, NotChecked=0, Total=2070 [2021-12-06 17:05:45,883 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 36 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:05:45,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 248 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 597 Invalid, 0 Unknown, 237 Unchecked, 0.6s Time] [2021-12-06 17:05:45,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-06 17:05:45,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2021-12-06 17:05:45,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 45 states have internal predecessors, (52), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 17:05:45,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2021-12-06 17:05:45,890 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 37 [2021-12-06 17:05:45,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:05:45,890 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2021-12-06 17:05:45,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 32 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 17:05:45,890 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2021-12-06 17:05:45,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 17:05:45,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:05:45,891 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 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] [2021-12-06 17:05:45,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 17:05:46,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:05:46,093 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:05:46,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:05:46,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1165720024, now seen corresponding path program 3 times [2021-12-06 17:05:46,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:05:46,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952990651] [2021-12-06 17:05:46,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:05:46,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:05:46,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:46,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:05:46,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:46,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 17:05:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:46,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 17:05:46,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:05:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 17:05:46,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:05:46,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952990651] [2021-12-06 17:05:46,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952990651] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:05:46,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043189152] [2021-12-06 17:05:46,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:05:46,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:05:46,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:05:46,333 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:05:46,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 17:05:46,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 17:05:46,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:05:46,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-06 17:05:46,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:05:46,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 17:05:46,652 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-12-06 17:05:46,652 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:05:46,686 INFO L354 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2021-12-06 17:05:46,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-12-06 17:05:46,735 INFO L354 Elim1Store]: treesize reduction 129, result has 19.4 percent of original size [2021-12-06 17:05:46,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 49 [2021-12-06 17:05:46,815 INFO L354 Elim1Store]: treesize reduction 202, result has 16.5 percent of original size [2021-12-06 17:05:46,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 62 [2021-12-06 17:05:46,916 INFO L354 Elim1Store]: treesize reduction 278, result has 15.2 percent of original size [2021-12-06 17:05:46,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 74 [2021-12-06 17:05:54,179 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:05:54,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:05:55,604 INFO L388 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 34 treesize of output 32 [2021-12-06 17:05:55,606 INFO L388 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 382 treesize of output 378 [2021-12-06 17:05:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:05:55,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043189152] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:05:55,669 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:05:55,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 14] total 37 [2021-12-06 17:05:55,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183313817] [2021-12-06 17:05:55,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:05:55,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 17:05:55,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:05:55,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 17:05:55,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1193, Unknown=2, NotChecked=0, Total=1332 [2021-12-06 17:05:55,671 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 35 states have internal predecessors, (73), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 17:06:10,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:06:10,739 INFO L93 Difference]: Finished difference Result 131 states and 160 transitions. [2021-12-06 17:06:10,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 17:06:10,740 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 35 states have internal predecessors, (73), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 41 [2021-12-06 17:06:10,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:06:10,741 INFO L225 Difference]: With dead ends: 131 [2021-12-06 17:06:10,741 INFO L226 Difference]: Without dead ends: 82 [2021-12-06 17:06:10,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=237, Invalid=2207, Unknown=6, NotChecked=0, Total=2450 [2021-12-06 17:06:10,743 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 46 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:06:10,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 407 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 406 Invalid, 0 Unknown, 102 Unchecked, 0.4s Time] [2021-12-06 17:06:10,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-06 17:06:10,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 75. [2021-12-06 17:06:10,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 58 states have (on average 1.2758620689655173) internal successors, (74), 60 states have internal predecessors, (74), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-06 17:06:10,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2021-12-06 17:06:10,753 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 41 [2021-12-06 17:06:10,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:06:10,753 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2021-12-06 17:06:10,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 35 states have internal predecessors, (73), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 17:06:10,754 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2021-12-06 17:06:10,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 17:06:10,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:06:10,754 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:06:10,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 17:06:10,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:06:10,955 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:06:10,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:06:10,955 INFO L85 PathProgramCache]: Analyzing trace with hash -150209962, now seen corresponding path program 4 times [2021-12-06 17:06:10,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:06:10,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388332117] [2021-12-06 17:06:10,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:06:10,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:06:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:06:11,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:06:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:06:11,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 17:06:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:06:11,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 17:06:11,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:06:11,186 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-06 17:06:11,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:06:11,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388332117] [2021-12-06 17:06:11,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388332117] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:06:11,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324077249] [2021-12-06 17:06:11,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:06:11,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:06:11,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:06:11,188 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:06:11,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 17:06:11,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:06:11,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:06:11,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-06 17:06:11,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:06:11,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 17:06:11,488 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-12-06 17:06:11,488 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:06:11,530 INFO L354 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2021-12-06 17:06:11,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-12-06 17:06:11,578 INFO L354 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2021-12-06 17:06:11,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2021-12-06 17:06:11,636 INFO L354 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2021-12-06 17:06:11,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2021-12-06 17:06:11,710 INFO L354 Elim1Store]: treesize reduction 295, result has 14.7 percent of original size [2021-12-06 17:06:11,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 76 [2021-12-06 17:06:11,800 INFO L354 Elim1Store]: treesize reduction 384, result has 13.7 percent of original size [2021-12-06 17:06:11,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 74 treesize of output 88 [2021-12-06 17:06:13,236 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:06:13,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:06:15,370 INFO L388 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 52 treesize of output 50 [2021-12-06 17:06:15,372 INFO L388 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 6132 treesize of output 6124 [2021-12-06 17:06:19,002 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:06:19,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324077249] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:06:19,002 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:06:19,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19, 18] total 44 [2021-12-06 17:06:19,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373701649] [2021-12-06 17:06:19,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:06:19,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-06 17:06:19,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:06:19,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-06 17:06:19,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1718, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 17:06:19,004 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand has 44 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 42 states have internal predecessors, (83), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 17:06:22,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:06:22,691 INFO L93 Difference]: Finished difference Result 171 states and 226 transitions. [2021-12-06 17:06:22,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 17:06:22,691 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 42 states have internal predecessors, (83), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2021-12-06 17:06:22,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:06:22,692 INFO L225 Difference]: With dead ends: 171 [2021-12-06 17:06:22,693 INFO L226 Difference]: Without dead ends: 115 [2021-12-06 17:06:22,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=369, Invalid=4053, Unknown=0, NotChecked=0, Total=4422 [2021-12-06 17:06:22,695 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 78 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 2051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 774 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:06:22,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 372 Invalid, 2051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1242 Invalid, 0 Unknown, 774 Unchecked, 1.5s Time] [2021-12-06 17:06:22,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-06 17:06:22,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2021-12-06 17:06:22,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.323943661971831) internal successors, (94), 75 states have internal predecessors, (94), 9 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-06 17:06:22,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 118 transitions. [2021-12-06 17:06:22,716 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 118 transitions. Word has length 45 [2021-12-06 17:06:22,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:06:22,716 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 118 transitions. [2021-12-06 17:06:22,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 42 states have internal predecessors, (83), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 17:06:22,716 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 118 transitions. [2021-12-06 17:06:22,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-06 17:06:22,717 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:06:22,718 INFO L514 BasicCegarLoop]: trace histogram [8, 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] [2021-12-06 17:06:22,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-06 17:06:22,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 17:06:22,919 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:06:22,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:06:22,921 INFO L85 PathProgramCache]: Analyzing trace with hash 389849080, now seen corresponding path program 1 times [2021-12-06 17:06:22,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:06:22,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479034707] [2021-12-06 17:06:22,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:06:22,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:06:22,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:06:23,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 17:06:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:06:23,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 17:06:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:06:23,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 17:06:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:06:23,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 17:06:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:06:23,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 17:06:23,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:06:23,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 17:06:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:06:23,315 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:06:23,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:06:23,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479034707] [2021-12-06 17:06:23,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479034707] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:06:23,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348900597] [2021-12-06 17:06:23,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:06:23,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:06:23,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:06:23,317 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:06:23,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 17:06:23,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:06:23,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 17:06:23,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:06:23,467 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 17:06:23,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:06:23,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348900597] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:06:23,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:06:23,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2021-12-06 17:06:23,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408019602] [2021-12-06 17:06:23,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:06:23,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:06:23,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:06:23,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:06:23,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:06:23,468 INFO L87 Difference]: Start difference. First operand 91 states and 118 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 17:06:23,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:06:23,495 INFO L93 Difference]: Finished difference Result 139 states and 179 transitions. [2021-12-06 17:06:23,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:06:23,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2021-12-06 17:06:23,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:06:23,496 INFO L225 Difference]: With dead ends: 139 [2021-12-06 17:06:23,497 INFO L226 Difference]: Without dead ends: 93 [2021-12-06 17:06:23,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-12-06 17:06:23,497 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:06:23,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 106 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:06:23,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-06 17:06:23,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2021-12-06 17:06:23,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.295774647887324) internal successors, (92), 75 states have internal predecessors, (92), 9 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-06 17:06:23,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2021-12-06 17:06:23,515 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 48 [2021-12-06 17:06:23,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:06:23,515 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2021-12-06 17:06:23,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 17:06:23,515 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2021-12-06 17:06:23,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 17:06:23,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:06:23,516 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:06:23,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 17:06:23,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:06:23,717 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:06:23,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:06:23,718 INFO L85 PathProgramCache]: Analyzing trace with hash -680817896, now seen corresponding path program 5 times [2021-12-06 17:06:23,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:06:23,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73685439] [2021-12-06 17:06:23,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:06:23,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:06:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:06:23,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:06:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:06:23,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 17:06:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:06:24,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 17:06:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:06:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 17:06:24,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:06:24,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73685439] [2021-12-06 17:06:24,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73685439] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:06:24,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245854172] [2021-12-06 17:06:24,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:06:24,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:06:24,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:06:24,056 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:06:24,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 17:06:25,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-06 17:06:25,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:06:25,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-06 17:06:25,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:06:25,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 17:06:25,511 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-12-06 17:06:25,511 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:06:25,546 INFO L354 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2021-12-06 17:06:25,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-12-06 17:06:25,597 INFO L354 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2021-12-06 17:06:25,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2021-12-06 17:06:25,656 INFO L354 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2021-12-06 17:06:25,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2021-12-06 17:06:25,736 INFO L354 Elim1Store]: treesize reduction 295, result has 14.7 percent of original size [2021-12-06 17:06:25,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 76 [2021-12-06 17:06:25,851 INFO L354 Elim1Store]: treesize reduction 396, result has 13.3 percent of original size [2021-12-06 17:06:25,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 89 [2021-12-06 17:06:26,003 INFO L354 Elim1Store]: treesize reduction 742, result has 11.0 percent of original size [2021-12-06 17:06:26,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 126 [2021-12-06 17:06:43,716 WARN L322 ript$VariableManager]: TermVariabe |aux_mod_v_#Ultimate.C_memset_#t~loopctr676_131_92| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:06:43,716 WARN L322 ript$VariableManager]: TermVariabe |aux_div_v_#Ultimate.C_memset_#t~loopctr676_131_92| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:06:43,755 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:06:43,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:06:47,217 INFO L388 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 58 treesize of output 56 [2021-12-06 17:06:47,220 INFO L388 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 6352 treesize of output 6348 [2021-12-06 17:06:47,459 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 18 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:06:47,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245854172] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:06:47,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:06:47,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 20] total 49 [2021-12-06 17:06:47,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546342180] [2021-12-06 17:06:47,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:06:47,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 17:06:47,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:06:47,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 17:06:47,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=2100, Unknown=7, NotChecked=0, Total=2352 [2021-12-06 17:06:47,461 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand has 49 states, 49 states have (on average 1.8775510204081634) internal successors, (92), 47 states have internal predecessors, (92), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 17:06:50,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:06:50,876 INFO L93 Difference]: Finished difference Result 179 states and 234 transitions. [2021-12-06 17:06:50,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 17:06:50,877 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.8775510204081634) internal successors, (92), 47 states have internal predecessors, (92), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 49 [2021-12-06 17:06:50,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:06:50,877 INFO L225 Difference]: With dead ends: 179 [2021-12-06 17:06:50,878 INFO L226 Difference]: Without dead ends: 118 [2021-12-06 17:06:50,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=380, Invalid=3773, Unknown=7, NotChecked=0, Total=4160 [2021-12-06 17:06:50,879 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 70 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 1436 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 1762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:06:50,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 284 Invalid, 1762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1436 Invalid, 0 Unknown, 288 Unchecked, 2.1s Time] [2021-12-06 17:06:50,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-06 17:06:50,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2021-12-06 17:06:50,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 74 states have (on average 1.2972972972972974) internal successors, (96), 78 states have internal predecessors, (96), 9 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-06 17:06:50,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 120 transitions. [2021-12-06 17:06:50,894 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 120 transitions. Word has length 49 [2021-12-06 17:06:50,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:06:50,894 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 120 transitions. [2021-12-06 17:06:50,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.8775510204081634) internal successors, (92), 47 states have internal predecessors, (92), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 17:06:50,895 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 120 transitions. [2021-12-06 17:06:50,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 17:06:50,895 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:06:50,895 INFO L514 BasicCegarLoop]: trace histogram [9, 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] [2021-12-06 17:06:50,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 17:06:51,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 17:06:51,097 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:06:51,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:06:51,098 INFO L85 PathProgramCache]: Analyzing trace with hash -2105016774, now seen corresponding path program 1 times [2021-12-06 17:06:51,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:06:51,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152636109] [2021-12-06 17:06:51,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:06:51,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:06:51,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:06:51,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 17:06:51,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:06:51,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 17:06:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:06:51,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 17:06:51,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:06:51,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 17:06:51,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:06:51,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-06 17:06:51,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:06:51,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 17:06:51,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:06:51,454 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 17:06:51,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:06:51,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152636109] [2021-12-06 17:06:51,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152636109] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:06:51,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357858035] [2021-12-06 17:06:51,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:06:51,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:06:51,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:06:51,455 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:06:51,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 17:06:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:06:51,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-06 17:06:51,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:06:52,109 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:06:52,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:06:52,401 INFO L388 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 [2021-12-06 17:06:52,460 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-06 17:06:52,460 INFO L388 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 19 treesize of output 18 [2021-12-06 17:06:52,530 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-12-06 17:06:52,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 67 [2021-12-06 17:06:52,703 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-06 17:06:52,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357858035] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:06:52,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:06:52,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22, 11] total 39 [2021-12-06 17:06:52,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993817986] [2021-12-06 17:06:52,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:06:52,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 17:06:52,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:06:52,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 17:06:52,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1361, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 17:06:52,705 INFO L87 Difference]: Start difference. First operand 94 states and 120 transitions. Second operand has 39 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 7 states have call successors, (16), 5 states have call predecessors, (16), 8 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2021-12-06 17:06:53,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:06:53,421 INFO L93 Difference]: Finished difference Result 164 states and 208 transitions. [2021-12-06 17:06:53,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 17:06:53,421 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 7 states have call successors, (16), 5 states have call predecessors, (16), 8 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 52 [2021-12-06 17:06:53,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:06:53,422 INFO L225 Difference]: With dead ends: 164 [2021-12-06 17:06:53,422 INFO L226 Difference]: Without dead ends: 96 [2021-12-06 17:06:53,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=206, Invalid=2344, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 17:06:53,423 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 45 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:06:53,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 405 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 798 Invalid, 0 Unknown, 132 Unchecked, 0.4s Time] [2021-12-06 17:06:53,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-06 17:06:53,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-12-06 17:06:53,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 76 states have (on average 1.263157894736842) internal successors, (96), 79 states have internal predecessors, (96), 9 states have call successors, (9), 8 states have call predecessors, (9), 10 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-06 17:06:53,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 120 transitions. [2021-12-06 17:06:53,435 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 120 transitions. Word has length 52 [2021-12-06 17:06:53,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:06:53,436 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 120 transitions. [2021-12-06 17:06:53,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 7 states have call successors, (16), 5 states have call predecessors, (16), 8 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2021-12-06 17:06:53,436 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 120 transitions. [2021-12-06 17:06:53,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 17:06:53,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:06:53,436 INFO L514 BasicCegarLoop]: trace histogram [13, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:06:53,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 17:06:53,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:06:53,638 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:06:53,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:06:53,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1246418474, now seen corresponding path program 6 times [2021-12-06 17:06:53,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:06:53,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235703533] [2021-12-06 17:06:53,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:06:53,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:06:53,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:06:53,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:06:53,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:06:53,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 17:06:53,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:06:54,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 17:06:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:06:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-06 17:06:54,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:06:54,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235703533] [2021-12-06 17:06:54,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235703533] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:06:54,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859123654] [2021-12-06 17:06:54,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:06:54,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:06:54,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:06:54,032 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:06:54,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 17:07:02,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-06 17:07:02,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:07:02,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 129 conjunts are in the unsatisfiable core [2021-12-06 17:07:02,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:07:02,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 17:07:02,948 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-12-06 17:07:02,948 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:07:03,003 INFO L354 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2021-12-06 17:07:03,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-12-06 17:07:03,070 INFO L354 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2021-12-06 17:07:03,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2021-12-06 17:07:03,142 INFO L354 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2021-12-06 17:07:03,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2021-12-06 17:07:03,243 INFO L354 Elim1Store]: treesize reduction 295, result has 14.7 percent of original size [2021-12-06 17:07:03,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 76 [2021-12-06 17:07:03,351 INFO L354 Elim1Store]: treesize reduction 396, result has 13.3 percent of original size [2021-12-06 17:07:03,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 89 [2021-12-06 17:07:03,480 INFO L354 Elim1Store]: treesize reduction 511, result has 12.2 percent of original size [2021-12-06 17:07:03,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 85 treesize of output 102 [2021-12-06 17:07:03,642 INFO L354 Elim1Store]: treesize reduction 640, result has 11.2 percent of original size [2021-12-06 17:07:03,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 115 [2021-12-06 17:07:03,822 INFO L354 Elim1Store]: treesize reduction 783, result has 10.4 percent of original size [2021-12-06 17:07:03,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 105 treesize of output 128 [2021-12-06 17:07:04,055 INFO L354 Elim1Store]: treesize reduction 940, result has 9.7 percent of original size [2021-12-06 17:07:04,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 115 treesize of output 141 [2021-12-06 17:07:04,315 INFO L354 Elim1Store]: treesize reduction 1111, result has 9.1 percent of original size [2021-12-06 17:07:04,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 125 treesize of output 154 [2021-12-06 17:07:04,650 INFO L354 Elim1Store]: treesize reduction 1296, result has 8.5 percent of original size [2021-12-06 17:07:04,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 135 treesize of output 167 [2021-12-06 17:07:35,158 WARN L322 ript$VariableManager]: TermVariabe |aux_mod_aux_mod_#Ultimate.C_memset_#t~loopctr676_61_97| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:07:35,158 WARN L322 ript$VariableManager]: TermVariabe |aux_div_aux_mod_#Ultimate.C_memset_#t~loopctr676_61_97| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:07:35,158 WARN L322 ript$VariableManager]: TermVariabe |aux_div_aux_mod_#Ultimate.C_memset_#amount_55_66| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:07:35,158 WARN L322 ript$VariableManager]: TermVariabe |aux_div_#Ultimate.C_memset_#t~loopctr676_61| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 17:07:35,261 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:07:35,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:07:57,910 WARN L227 SmtUtils]: Spent 20.54s on a formula simplification. DAG size of input: 196 DAG size of output: 194 (called from [L 234] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-12-06 17:08:03,697 INFO L388 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 175 treesize of output 171 [2021-12-06 17:08:03,722 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 17:08:03,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 376783 treesize of output 376777 [2021-12-06 17:08:19,626 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:08:19,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859123654] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:08:19,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:08:19,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 28, 27] total 68 [2021-12-06 17:08:19,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133001277] [2021-12-06 17:08:19,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:08:19,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-06 17:08:19,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:08:19,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-06 17:08:19,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=460, Invalid=4095, Unknown=1, NotChecked=0, Total=4556 [2021-12-06 17:08:19,629 INFO L87 Difference]: Start difference. First operand 96 states and 120 transitions. Second operand has 68 states, 68 states have (on average 1.4852941176470589) internal successors, (101), 66 states have internal predecessors, (101), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 17:09:33,597 WARN L227 SmtUtils]: Spent 1.09m on a formula simplification that was a NOOP. DAG size: 184 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:09:35,384 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:10:21,556 WARN L227 SmtUtils]: Spent 45.52s on a formula simplification that was a NOOP. DAG size: 170 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:10:23,573 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 17:10:53,576 WARN L227 SmtUtils]: Spent 29.01s on a formula simplification that was a NOOP. DAG size: 156 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:11:15,733 WARN L227 SmtUtils]: Spent 20.14s on a formula simplification that was a NOOP. DAG size: 142 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:11:26,554 WARN L227 SmtUtils]: Spent 9.28s on a formula simplification that was a NOOP. DAG size: 128 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:11:35,508 WARN L227 SmtUtils]: Spent 7.05s on a formula simplification that was a NOOP. DAG size: 115 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:12:00,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:12:00,224 INFO L93 Difference]: Finished difference Result 212 states and 276 transitions. [2021-12-06 17:12:00,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-06 17:12:00,225 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.4852941176470589) internal successors, (101), 66 states have internal predecessors, (101), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 51 [2021-12-06 17:12:00,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:12:00,226 INFO L225 Difference]: With dead ends: 212 [2021-12-06 17:12:00,226 INFO L226 Difference]: Without dead ends: 137 [2021-12-06 17:12:00,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2650 ImplicationChecksByTransitivity, 216.8s TimeCoverageRelationStatistics Valid=1295, Invalid=9624, Unknown=1, NotChecked=0, Total=10920 [2021-12-06 17:12:00,230 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 290 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 2367 mSolverCounterSat, 102 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 2737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2367 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:12:00,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 515 Invalid, 2737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2367 Invalid, 1 Unknown, 267 Unchecked, 14.8s Time] [2021-12-06 17:12:00,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-06 17:12:00,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 111. [2021-12-06 17:12:00,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 91 states have (on average 1.3406593406593406) internal successors, (122), 94 states have internal predecessors, (122), 9 states have call successors, (9), 8 states have call predecessors, (9), 10 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-06 17:12:00,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 146 transitions. [2021-12-06 17:12:00,252 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 146 transitions. Word has length 51 [2021-12-06 17:12:00,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:12:00,252 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 146 transitions. [2021-12-06 17:12:00,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.4852941176470589) internal successors, (101), 66 states have internal predecessors, (101), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 17:12:00,252 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 146 transitions. [2021-12-06 17:12:00,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 17:12:00,253 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:12:00,253 INFO L514 BasicCegarLoop]: trace histogram [14, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:12:00,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 17:12:00,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 17:12:00,455 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:12:00,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:12:00,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1407811306, now seen corresponding path program 7 times [2021-12-06 17:12:00,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:12:00,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590068344] [2021-12-06 17:12:00,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:12:00,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:12:00,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:12:00,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 17:12:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:12:00,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 17:12:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:12:00,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 17:12:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:12:00,891 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-06 17:12:00,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:12:00,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590068344] [2021-12-06 17:12:00,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590068344] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:12:00,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229806081] [2021-12-06 17:12:00,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:12:00,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:12:00,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:12:00,892 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:12:00,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd43b7a-570a-4e40-b9b5-5267e4e4d386/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 17:12:01,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:12:01,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 113 conjunts are in the unsatisfiable core [2021-12-06 17:12:01,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:12:01,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 17:12:01,615 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-12-06 17:12:01,615 INFO L388 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 17:12:01,661 INFO L354 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2021-12-06 17:12:01,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-12-06 17:12:01,731 INFO L354 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2021-12-06 17:12:01,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2021-12-06 17:12:01,799 INFO L354 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2021-12-06 17:12:01,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2021-12-06 17:12:01,884 INFO L354 Elim1Store]: treesize reduction 295, result has 14.7 percent of original size [2021-12-06 17:12:01,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 76 [2021-12-06 17:12:01,985 INFO L354 Elim1Store]: treesize reduction 396, result has 13.3 percent of original size [2021-12-06 17:12:01,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 89 [2021-12-06 17:12:02,103 INFO L354 Elim1Store]: treesize reduction 511, result has 12.2 percent of original size [2021-12-06 17:12:02,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 85 treesize of output 102 [2021-12-06 17:12:02,243 INFO L354 Elim1Store]: treesize reduction 640, result has 11.2 percent of original size [2021-12-06 17:12:02,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 115 [2021-12-06 17:12:02,419 INFO L354 Elim1Store]: treesize reduction 765, result has 10.6 percent of original size [2021-12-06 17:12:02,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 104 treesize of output 127 [2021-12-06 17:12:02,669 INFO L354 Elim1Store]: treesize reduction 765, result has 10.6 percent of original size [2021-12-06 17:12:02,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 104 treesize of output 127 [2021-12-06 17:12:02,923 INFO L354 Elim1Store]: treesize reduction 765, result has 10.6 percent of original size [2021-12-06 17:12:02,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 104 treesize of output 127 [2021-12-06 17:12:03,216 INFO L354 Elim1Store]: treesize reduction 908, result has 9.9 percent of original size [2021-12-06 17:12:03,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 113 treesize of output 139 [2021-12-06 17:12:03,562 INFO L354 Elim1Store]: treesize reduction 908, result has 9.9 percent of original size [2021-12-06 17:12:03,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 113 treesize of output 139 [2021-12-06 17:12:21,650 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 6 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:12:21,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:12:32,436 WARN L227 SmtUtils]: Spent 7.53s on a formula simplification that was a NOOP. DAG size: 190 (called from [L 234] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-12-06 17:14:57,803 INFO L388 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 181 treesize of output 177 [2021-12-06 17:14:57,947 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 17:14:57,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 395437789 treesize of output 395433629