./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_init_static_harness.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_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/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_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_init_static_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/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_5b16723c-6943-4654-8a35-0df6092db71a/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 23ef598a219073b4e1ea2c3302ab5b9fcd0bd41db1d8d7141c8967f07530c02d --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 21:08:38,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 21:08:38,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 21:08:38,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 21:08:38,913 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 21:08:38,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 21:08:38,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 21:08:38,917 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 21:08:38,919 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 21:08:38,920 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 21:08:38,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 21:08:38,921 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 21:08:38,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 21:08:38,923 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 21:08:38,924 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 21:08:38,925 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 21:08:38,926 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 21:08:38,927 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 21:08:38,928 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 21:08:38,930 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 21:08:38,931 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 21:08:38,933 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 21:08:38,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 21:08:38,934 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 21:08:38,937 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 21:08:38,937 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 21:08:38,938 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 21:08:38,938 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 21:08:38,939 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 21:08:38,940 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 21:08:38,940 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 21:08:38,941 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 21:08:38,941 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 21:08:38,942 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 21:08:38,943 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 21:08:38,943 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 21:08:38,943 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 21:08:38,944 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 21:08:38,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 21:08:38,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 21:08:38,945 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 21:08:38,946 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-06 21:08:38,963 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 21:08:38,963 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 21:08:38,963 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 21:08:38,963 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 21:08:38,964 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 21:08:38,964 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 21:08:38,964 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 21:08:38,965 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 21:08:38,965 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 21:08:38,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 21:08:38,965 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 21:08:38,965 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 21:08:38,965 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 21:08:38,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 21:08:38,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 21:08:38,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 21:08:38,966 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 21:08:38,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 21:08:38,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 21:08:38,966 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 21:08:38,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 21:08:38,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:08:38,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 21:08:38,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 21:08:38,966 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 21:08:38,967 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 21:08:38,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 21:08:38,967 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 21:08:38,967 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 21:08:38,967 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 21:08:38,967 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 21:08:38,967 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_5b16723c-6943-4654-8a35-0df6092db71a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23ef598a219073b4e1ea2c3302ab5b9fcd0bd41db1d8d7141c8967f07530c02d [2021-12-06 21:08:39,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 21:08:39,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 21:08:39,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 21:08:39,167 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 21:08:39,168 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 21:08:39,168 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/aws-c-common/aws_priority_queue_init_static_harness.i [2021-12-06 21:08:39,209 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/data/b2e83e94a/593646bec9f2480a88535d0dacecd780/FLAGf40ef55b3 [2021-12-06 21:08:39,722 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 21:08:39,723 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_static_harness.i [2021-12-06 21:08:39,745 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/data/b2e83e94a/593646bec9f2480a88535d0dacecd780/FLAGf40ef55b3 [2021-12-06 21:08:40,244 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/data/b2e83e94a/593646bec9f2480a88535d0dacecd780 [2021-12-06 21:08:40,246 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 21:08:40,247 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 21:08:40,248 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 21:08:40,249 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 21:08:40,252 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 21:08:40,252 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:08:40" (1/1) ... [2021-12-06 21:08:40,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cef8b5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:08:40, skipping insertion in model container [2021-12-06 21:08:40,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:08:40" (1/1) ... [2021-12-06 21:08:40,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 21:08:40,334 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 21:08:40,508 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_5b16723c-6943-4654-8a35-0df6092db71a/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_static_harness.i[4504,4517] [2021-12-06 21:08:40,512 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_5b16723c-6943-4654-8a35-0df6092db71a/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_static_harness.i[4564,4577] [2021-12-06 21:08:41,034 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-06 21:08:41,083 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 21:08:41,083 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 21:08:41,083 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 21:08:41,084 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 21:08:41,085 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 21:08:41,094 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 21:08:41,094 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 21:08:41,095 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 21:08:41,096 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 21:08:41,357 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-06 21:08:41,358 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-06 21:08:41,358 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-06 21:08:41,359 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-06 21:08:41,360 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-06 21:08:41,360 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-06 21:08:41,361 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-06 21:08:41,361 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-06 21:08:41,362 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-06 21:08:41,362 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-06 21:08:41,468 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 21:08:41,468 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 21:08:41,506 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:08:41,526 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 21:08:41,535 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_5b16723c-6943-4654-8a35-0df6092db71a/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_static_harness.i[4504,4517] [2021-12-06 21:08:41,536 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_5b16723c-6943-4654-8a35-0df6092db71a/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_static_harness.i[4564,4577] [2021-12-06 21:08:41,558 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-06 21:08:41,568 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 21:08:41,568 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 21:08:41,568 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 21:08:41,569 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 21:08:41,569 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 21:08:41,574 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 21:08:41,574 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 21:08:41,575 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 21:08:41,576 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 21:08:41,601 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-06 21:08:41,601 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-06 21:08:41,602 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-06 21:08:41,603 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-06 21:08:41,604 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-06 21:08:41,604 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-06 21:08:41,605 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-06 21:08:41,605 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-06 21:08:41,605 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-06 21:08:41,606 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-06 21:08:41,638 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 21:08:41,639 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 21:08:41,660 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:08:41,886 INFO L208 MainTranslator]: Completed translation [2021-12-06 21:08:41,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:08:41 WrapperNode [2021-12-06 21:08:41,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 21:08:41,888 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 21:08:41,888 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 21:08:41,888 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 21:08:41,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:08:41" (1/1) ... [2021-12-06 21:08:41,956 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:08:41" (1/1) ... [2021-12-06 21:08:42,012 INFO L137 Inliner]: procedures = 689, calls = 1509, calls flagged for inlining = 54, calls inlined = 9, statements flattened = 653 [2021-12-06 21:08:42,012 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 21:08:42,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 21:08:42,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 21:08:42,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 21:08:42,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:08:41" (1/1) ... [2021-12-06 21:08:42,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:08:41" (1/1) ... [2021-12-06 21:08:42,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:08:41" (1/1) ... [2021-12-06 21:08:42,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:08:41" (1/1) ... [2021-12-06 21:08:42,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:08:41" (1/1) ... [2021-12-06 21:08:42,054 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:08:41" (1/1) ... [2021-12-06 21:08:42,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:08:41" (1/1) ... [2021-12-06 21:08:42,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 21:08:42,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 21:08:42,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 21:08:42,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 21:08:42,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:08:41" (1/1) ... [2021-12-06 21:08:42,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:08:42,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:08:42,102 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 21:08:42,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 21:08:42,133 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-12-06 21:08:42,133 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-12-06 21:08:42,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 21:08:42,133 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2021-12-06 21:08:42,133 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2021-12-06 21:08:42,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 21:08:42,133 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-12-06 21:08:42,133 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-12-06 21:08:42,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 21:08:42,134 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 21:08:42,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 21:08:42,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 21:08:42,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 21:08:42,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 21:08:42,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 21:08:42,134 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-06 21:08:42,135 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-06 21:08:42,135 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-12-06 21:08:42,135 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-12-06 21:08:42,135 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2021-12-06 21:08:42,135 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2021-12-06 21:08:42,135 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-06 21:08:42,135 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-06 21:08:42,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 21:08:42,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 21:08:42,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 21:08:42,136 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-12-06 21:08:42,136 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-12-06 21:08:42,136 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-06 21:08:42,136 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-06 21:08:42,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 21:08:42,136 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2021-12-06 21:08:42,137 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2021-12-06 21:08:42,137 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2021-12-06 21:08:42,137 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2021-12-06 21:08:42,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 21:08:42,339 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 21:08:42,341 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 21:08:43,102 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 21:08:43,122 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 21:08:43,122 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-06 21:08:43,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:08:43 BoogieIcfgContainer [2021-12-06 21:08:43,124 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 21:08:43,126 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 21:08:43,126 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 21:08:43,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 21:08:43,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 09:08:40" (1/3) ... [2021-12-06 21:08:43,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@319b8b6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:08:43, skipping insertion in model container [2021-12-06 21:08:43,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:08:41" (2/3) ... [2021-12-06 21:08:43,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@319b8b6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:08:43, skipping insertion in model container [2021-12-06 21:08:43,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:08:43" (3/3) ... [2021-12-06 21:08:43,131 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_init_static_harness.i [2021-12-06 21:08:43,134 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 21:08:43,134 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 21:08:43,170 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 21:08:43,175 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 21:08:43,175 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 21:08:43,191 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 95 states have internal predecessors, (118), 39 states have call successors, (39), 12 states have call predecessors, (39), 12 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-12-06 21:08:43,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-06 21:08:43,199 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:08:43,200 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:08:43,201 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:08:43,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:08:43,205 INFO L85 PathProgramCache]: Analyzing trace with hash 602311799, now seen corresponding path program 1 times [2021-12-06 21:08:43,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:08:43,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914991446] [2021-12-06 21:08:43,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:08:43,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:08:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:08:43,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 21:08:43,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:08:43,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 21:08:43,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:08:43,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 21:08:43,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:08:43,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914991446] [2021-12-06 21:08:43,605 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-12-06 21:08:43,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260645911] [2021-12-06 21:08:43,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:08:43,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:08:43,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:08:43,607 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:08:43,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 21:08:43,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:08:43,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 2260 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-06 21:08:43,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:08:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-12-06 21:08:44,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:08:44,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260645911] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:08:44,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:08:44,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:08:44,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758615285] [2021-12-06 21:08:44,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:08:44,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 21:08:44,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:08:44,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 21:08:44,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:08:44,125 INFO L87 Difference]: Start difference. First operand has 147 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 95 states have internal predecessors, (118), 39 states have call successors, (39), 12 states have call predecessors, (39), 12 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) Second operand has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-06 21:08:44,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:08:44,164 INFO L93 Difference]: Finished difference Result 291 states and 418 transitions. [2021-12-06 21:08:44,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 21:08:44,166 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 2 states have call successors, (18) Word has length 110 [2021-12-06 21:08:44,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:08:44,176 INFO L225 Difference]: With dead ends: 291 [2021-12-06 21:08:44,176 INFO L226 Difference]: Without dead ends: 141 [2021-12-06 21:08:44,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:08:44,183 INFO L933 BasicCegarLoop]: 190 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, 190 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 21:08:44,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:08:44,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-06 21:08:44,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-12-06 21:08:44,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 89 states have (on average 1.1910112359550562) internal successors, (106), 90 states have internal predecessors, (106), 39 states have call successors, (39), 12 states have call predecessors, (39), 12 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2021-12-06 21:08:44,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 183 transitions. [2021-12-06 21:08:44,222 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 183 transitions. Word has length 110 [2021-12-06 21:08:44,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:08:44,223 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 183 transitions. [2021-12-06 21:08:44,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-06 21:08:44,223 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 183 transitions. [2021-12-06 21:08:44,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-06 21:08:44,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:08:44,226 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:08:44,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 21:08:44,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-06 21:08:44,427 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:08:44,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:08:44,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1578415580, now seen corresponding path program 1 times [2021-12-06 21:08:44,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:08:44,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113945732] [2021-12-06 21:08:44,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:08:44,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:08:44,598 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:08:44,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132328234] [2021-12-06 21:08:44,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:08:44,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:08:44,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:08:44,600 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:08:44,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 21:08:44,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:08:44,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 2337 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 21:08:44,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:08:45,147 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2021-12-06 21:08:45,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:08:45,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:08:45,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113945732] [2021-12-06 21:08:45,148 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:08:45,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132328234] [2021-12-06 21:08:45,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132328234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:08:45,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:08:45,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:08:45,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894496999] [2021-12-06 21:08:45,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:08:45,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:08:45,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:08:45,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:08:45,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:08:45,151 INFO L87 Difference]: Start difference. First operand 141 states and 183 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) [2021-12-06 21:08:45,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:08:45,318 INFO L93 Difference]: Finished difference Result 237 states and 304 transitions. [2021-12-06 21:08:45,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 21:08:45,319 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) Word has length 127 [2021-12-06 21:08:45,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:08:45,324 INFO L225 Difference]: With dead ends: 237 [2021-12-06 21:08:45,324 INFO L226 Difference]: Without dead ends: 143 [2021-12-06 21:08:45,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 121 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 21:08:45,326 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 62 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:08:45,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 862 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:08:45,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-06 21:08:45,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-12-06 21:08:45,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 90 states have (on average 1.1888888888888889) internal successors, (107), 92 states have internal predecessors, (107), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2021-12-06 21:08:45,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 186 transitions. [2021-12-06 21:08:45,348 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 186 transitions. Word has length 127 [2021-12-06 21:08:45,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:08:45,349 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 186 transitions. [2021-12-06 21:08:45,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) [2021-12-06 21:08:45,349 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 186 transitions. [2021-12-06 21:08:45,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-06 21:08:45,353 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:08:45,353 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:45,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 21:08:45,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-06 21:08:45,554 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:08:45,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:08:45,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1074934923, now seen corresponding path program 1 times [2021-12-06 21:08:45,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:08:45,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351028278] [2021-12-06 21:08:45,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:08:45,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:08:45,611 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:08:45,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1263446881] [2021-12-06 21:08:45,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:08:45,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:08:45,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:08:45,613 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:08:45,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 21:08:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:08:45,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 2473 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 21:08:45,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:08:46,013 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-12-06 21:08:46,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:08:46,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:08:46,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351028278] [2021-12-06 21:08:46,014 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:08:46,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263446881] [2021-12-06 21:08:46,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263446881] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:08:46,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:08:46,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:08:46,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190610934] [2021-12-06 21:08:46,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:08:46,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:08:46,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:08:46,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:08:46,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:08:46,016 INFO L87 Difference]: Start difference. First operand 143 states and 186 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2021-12-06 21:08:46,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:08:46,038 INFO L93 Difference]: Finished difference Result 244 states and 318 transitions. [2021-12-06 21:08:46,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:08:46,039 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) Word has length 142 [2021-12-06 21:08:46,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:08:46,041 INFO L225 Difference]: With dead ends: 244 [2021-12-06 21:08:46,041 INFO L226 Difference]: Without dead ends: 148 [2021-12-06 21:08:46,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:08:46,043 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 10 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:08:46,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 536 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:08:46,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-06 21:08:46,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 145. [2021-12-06 21:08:46,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 92 states have (on average 1.184782608695652) internal successors, (109), 94 states have internal predecessors, (109), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2021-12-06 21:08:46,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 188 transitions. [2021-12-06 21:08:46,054 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 188 transitions. Word has length 142 [2021-12-06 21:08:46,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:08:46,055 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 188 transitions. [2021-12-06 21:08:46,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2021-12-06 21:08:46,055 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 188 transitions. [2021-12-06 21:08:46,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-06 21:08:46,057 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:08:46,057 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:46,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 21:08:46,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:08:46,260 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:08:46,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:08:46,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1467961933, now seen corresponding path program 1 times [2021-12-06 21:08:46,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:08:46,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940064599] [2021-12-06 21:08:46,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:08:46,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:08:46,414 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:08:46,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [380201825] [2021-12-06 21:08:46,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:08:46,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:08:46,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:08:46,416 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:08:46,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 21:08:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:08:46,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 2478 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 21:08:46,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:08:46,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 21:08:48,962 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_585 Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (= (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_585)) |c_#memory_$Pointer$.base|)) is different from true [2021-12-06 21:08:58,993 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-12-06 21:08:58,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:08:58,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:08:58,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940064599] [2021-12-06 21:08:58,994 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:08:58,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380201825] [2021-12-06 21:08:58,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380201825] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:08:58,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:08:58,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-06 21:08:58,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129261582] [2021-12-06 21:08:58,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:08:58,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 21:08:58,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:08:58,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 21:08:58,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=203, Unknown=3, NotChecked=28, Total=272 [2021-12-06 21:08:58,996 INFO L87 Difference]: Start difference. First operand 145 states and 188 transitions. Second operand has 17 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 8 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (23), 8 states have call predecessors, (23), 7 states have call successors, (23) [2021-12-06 21:08:59,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:08:59,682 INFO L93 Difference]: Finished difference Result 365 states and 500 transitions. [2021-12-06 21:08:59,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 21:08:59,682 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 8 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (23), 8 states have call predecessors, (23), 7 states have call successors, (23) Word has length 142 [2021-12-06 21:08:59,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:08:59,685 INFO L225 Difference]: With dead ends: 365 [2021-12-06 21:08:59,685 INFO L226 Difference]: Without dead ends: 267 [2021-12-06 21:08:59,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=65, Invalid=356, Unknown=3, NotChecked=38, Total=462 [2021-12-06 21:08:59,686 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 182 mSDsluCounter, 1367 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 1939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 735 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 21:08:59,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 1580 Invalid, 1939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1002 Invalid, 0 Unknown, 735 Unchecked, 0.6s Time] [2021-12-06 21:08:59,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-12-06 21:08:59,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 153. [2021-12-06 21:08:59,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 99 states have (on average 1.1919191919191918) internal successors, (118), 101 states have internal predecessors, (118), 39 states have call successors, (39), 12 states have call predecessors, (39), 14 states have return successors, (43), 39 states have call predecessors, (43), 38 states have call successors, (43) [2021-12-06 21:08:59,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 200 transitions. [2021-12-06 21:08:59,706 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 200 transitions. Word has length 142 [2021-12-06 21:08:59,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:08:59,706 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 200 transitions. [2021-12-06 21:08:59,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 8 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (23), 8 states have call predecessors, (23), 7 states have call successors, (23) [2021-12-06 21:08:59,707 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 200 transitions. [2021-12-06 21:08:59,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-06 21:08:59,708 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:08:59,708 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:59,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 21:08:59,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:08:59,910 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:08:59,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:08:59,911 INFO L85 PathProgramCache]: Analyzing trace with hash -659588909, now seen corresponding path program 1 times [2021-12-06 21:08:59,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:08:59,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296672899] [2021-12-06 21:08:59,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:08:59,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:09:00,063 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:09:00,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87648176] [2021-12-06 21:09:00,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:09:00,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:09:00,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:09:00,065 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:09:00,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 21:09:00,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:00,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 2482 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 21:09:00,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:09:00,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 21:09:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-12-06 21:09:00,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:09:00,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:09:00,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296672899] [2021-12-06 21:09:00,599 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:09:00,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87648176] [2021-12-06 21:09:00,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87648176] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:09:00,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:09:00,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-06 21:09:00,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368978226] [2021-12-06 21:09:00,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:09:00,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 21:09:00,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:09:00,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 21:09:00,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-12-06 21:09:00,602 INFO L87 Difference]: Start difference. First operand 153 states and 200 transitions. Second operand has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 8 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2021-12-06 21:09:01,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:09:01,231 INFO L93 Difference]: Finished difference Result 322 states and 429 transitions. [2021-12-06 21:09:01,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 21:09:01,231 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 8 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) Word has length 148 [2021-12-06 21:09:01,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:09:01,233 INFO L225 Difference]: With dead ends: 322 [2021-12-06 21:09:01,233 INFO L226 Difference]: Without dead ends: 216 [2021-12-06 21:09:01,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-12-06 21:09:01,234 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 148 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 21:09:01,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 1082 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 21:09:01,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-06 21:09:01,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 146. [2021-12-06 21:09:01,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 93 states have (on average 1.1827956989247312) internal successors, (110), 95 states have internal predecessors, (110), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2021-12-06 21:09:01,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 189 transitions. [2021-12-06 21:09:01,247 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 189 transitions. Word has length 148 [2021-12-06 21:09:01,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:09:01,247 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 189 transitions. [2021-12-06 21:09:01,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 8 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2021-12-06 21:09:01,248 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 189 transitions. [2021-12-06 21:09:01,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-06 21:09:01,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:09:01,249 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:01,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-06 21:09:01,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:09:01,451 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:09:01,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:09:01,452 INFO L85 PathProgramCache]: Analyzing trace with hash 940161605, now seen corresponding path program 1 times [2021-12-06 21:09:01,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:09:01,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681058857] [2021-12-06 21:09:01,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:09:01,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:09:01,529 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:09:01,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [447116405] [2021-12-06 21:09:01,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:09:01,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:09:01,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:09:01,530 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:09:01,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 21:09:01,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:01,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 2478 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 21:09:01,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:09:01,946 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-12-06 21:09:01,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:09:01,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:09:01,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681058857] [2021-12-06 21:09:01,946 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:09:01,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447116405] [2021-12-06 21:09:01,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447116405] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:09:01,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:09:01,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:09:01,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277548096] [2021-12-06 21:09:01,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:09:01,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:09:01,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:09:01,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:09:01,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:09:01,948 INFO L87 Difference]: Start difference. First operand 146 states and 189 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2021-12-06 21:09:02,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:09:02,080 INFO L93 Difference]: Finished difference Result 250 states and 325 transitions. [2021-12-06 21:09:02,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:09:02,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) Word has length 144 [2021-12-06 21:09:02,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:09:02,082 INFO L225 Difference]: With dead ends: 250 [2021-12-06 21:09:02,083 INFO L226 Difference]: Without dead ends: 151 [2021-12-06 21:09:02,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 140 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 21:09:02,084 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 7 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:09:02,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 673 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:09:02,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-06 21:09:02,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2021-12-06 21:09:02,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 94 states have (on average 1.1808510638297873) internal successors, (111), 96 states have internal predecessors, (111), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2021-12-06 21:09:02,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 190 transitions. [2021-12-06 21:09:02,098 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 190 transitions. Word has length 144 [2021-12-06 21:09:02,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:09:02,099 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 190 transitions. [2021-12-06 21:09:02,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2021-12-06 21:09:02,099 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 190 transitions. [2021-12-06 21:09:02,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-06 21:09:02,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:09:02,102 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:02,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 21:09:02,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:09:02,302 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:09:02,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:09:02,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1620219975, now seen corresponding path program 1 times [2021-12-06 21:09:02,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:09:02,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123100421] [2021-12-06 21:09:02,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:09:02,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:09:02,355 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:09:02,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [695505825] [2021-12-06 21:09:02,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:09:02,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:09:02,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:09:02,356 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:09:02,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 21:09:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:02,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 2483 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 21:09:02,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:09:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-12-06 21:09:02,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:09:02,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:09:02,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123100421] [2021-12-06 21:09:02,804 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:09:02,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695505825] [2021-12-06 21:09:02,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695505825] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:09:02,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:09:02,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 21:09:02,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131249807] [2021-12-06 21:09:02,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:09:02,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:09:02,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:09:02,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:09:02,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:09:02,806 INFO L87 Difference]: Start difference. First operand 147 states and 190 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 4 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-12-06 21:09:02,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:09:02,854 INFO L93 Difference]: Finished difference Result 266 states and 340 transitions. [2021-12-06 21:09:02,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:09:02,855 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 4 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 144 [2021-12-06 21:09:02,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:09:02,856 INFO L225 Difference]: With dead ends: 266 [2021-12-06 21:09:02,856 INFO L226 Difference]: Without dead ends: 147 [2021-12-06 21:09:02,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:09:02,858 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 13 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:09:02,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 870 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:09:02,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-12-06 21:09:02,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-12-06 21:09:02,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 94 states have (on average 1.1702127659574468) internal successors, (110), 96 states have internal predecessors, (110), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2021-12-06 21:09:02,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 189 transitions. [2021-12-06 21:09:02,867 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 189 transitions. Word has length 144 [2021-12-06 21:09:02,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:09:02,868 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 189 transitions. [2021-12-06 21:09:02,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 4 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-12-06 21:09:02,868 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 189 transitions. [2021-12-06 21:09:02,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-06 21:09:02,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:09:02,870 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:02,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 21:09:03,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:09:03,070 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:09:03,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:09:03,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1782655420, now seen corresponding path program 1 times [2021-12-06 21:09:03,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:09:03,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639448542] [2021-12-06 21:09:03,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:09:03,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:09:03,108 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:09:03,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1938713442] [2021-12-06 21:09:03,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:09:03,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:09:03,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:09:03,110 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:09:03,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 21:09:03,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:03,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 2490 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 21:09:03,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:09:03,551 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-12-06 21:09:03,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:09:03,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:09:03,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639448542] [2021-12-06 21:09:03,552 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:09:03,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938713442] [2021-12-06 21:09:03,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938713442] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:09:03,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:09:03,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:09:03,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053928585] [2021-12-06 21:09:03,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:09:03,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:09:03,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:09:03,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:09:03,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:09:03,553 INFO L87 Difference]: Start difference. First operand 147 states and 189 transitions. Second operand has 5 states, 4 states have (on average 13.5) internal successors, (54), 5 states have internal predecessors, (54), 4 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) [2021-12-06 21:09:03,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:09:03,576 INFO L93 Difference]: Finished difference Result 268 states and 342 transitions. [2021-12-06 21:09:03,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:09:03,576 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 13.5) internal successors, (54), 5 states have internal predecessors, (54), 4 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) Word has length 145 [2021-12-06 21:09:03,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:09:03,577 INFO L225 Difference]: With dead ends: 268 [2021-12-06 21:09:03,577 INFO L226 Difference]: Without dead ends: 149 [2021-12-06 21:09:03,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:09:03,578 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 9 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:09:03,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 692 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:09:03,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-06 21:09:03,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2021-12-06 21:09:03,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 95 states have (on average 1.168421052631579) internal successors, (111), 97 states have internal predecessors, (111), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2021-12-06 21:09:03,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 190 transitions. [2021-12-06 21:09:03,586 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 190 transitions. Word has length 145 [2021-12-06 21:09:03,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:09:03,587 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 190 transitions. [2021-12-06 21:09:03,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 13.5) internal successors, (54), 5 states have internal predecessors, (54), 4 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) [2021-12-06 21:09:03,587 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 190 transitions. [2021-12-06 21:09:03,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-06 21:09:03,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:09:03,588 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:03,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 21:09:03,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:09:03,789 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:09:03,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:09:03,789 INFO L85 PathProgramCache]: Analyzing trace with hash -626640314, now seen corresponding path program 1 times [2021-12-06 21:09:03,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:09:03,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585665956] [2021-12-06 21:09:03,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:09:03,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:09:03,844 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:09:03,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [853146065] [2021-12-06 21:09:03,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:09:03,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:09:03,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:09:03,845 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:09:03,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 21:09:04,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:04,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 2509 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 21:09:04,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:09:04,399 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 198 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-12-06 21:09:04,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:09:04,701 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-12-06 21:09:04,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:09:04,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585665956] [2021-12-06 21:09:04,701 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:09:04,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853146065] [2021-12-06 21:09:04,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853146065] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:09:04,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:09:04,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-12-06 21:09:04,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212692411] [2021-12-06 21:09:04,701 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:09:04,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 21:09:04,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:09:04,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 21:09:04,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-06 21:09:04,702 INFO L87 Difference]: Start difference. First operand 148 states and 190 transitions. Second operand has 13 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 13 states have internal predecessors, (74), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2021-12-06 21:09:04,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:09:04,794 INFO L93 Difference]: Finished difference Result 270 states and 344 transitions. [2021-12-06 21:09:04,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 21:09:04,795 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 13 states have internal predecessors, (74), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) Word has length 147 [2021-12-06 21:09:04,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:09:04,796 INFO L225 Difference]: With dead ends: 270 [2021-12-06 21:09:04,796 INFO L226 Difference]: Without dead ends: 151 [2021-12-06 21:09:04,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-12-06 21:09:04,797 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 29 mSDsluCounter, 1208 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1384 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:09:04,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 1384 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:09:04,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-06 21:09:04,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2021-12-06 21:09:04,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 99 states have internal predecessors, (113), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (40), 38 states have call predecessors, (40), 38 states have call successors, (40) [2021-12-06 21:09:04,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 192 transitions. [2021-12-06 21:09:04,805 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 192 transitions. Word has length 147 [2021-12-06 21:09:04,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:09:04,805 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 192 transitions. [2021-12-06 21:09:04,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 13 states have internal predecessors, (74), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2021-12-06 21:09:04,805 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 192 transitions. [2021-12-06 21:09:04,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-06 21:09:04,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:09:04,806 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:04,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 21:09:05,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:09:05,008 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:09:05,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:09:05,009 INFO L85 PathProgramCache]: Analyzing trace with hash -2092653112, now seen corresponding path program 2 times [2021-12-06 21:09:05,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:09:05,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797749369] [2021-12-06 21:09:05,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:09:05,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:09:05,152 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:09:05,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1940041816] [2021-12-06 21:09:05,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:09:05,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:09:05,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:09:05,154 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:09:05,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 21:09:06,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:09:06,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:09:06,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 2528 conjuncts, 154 conjunts are in the unsatisfiable core [2021-12-06 21:09:06,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:09:06,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 21:09:06,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:09:06,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:09:06,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:09:06,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 35 [2021-12-06 21:09:19,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 99 [2021-12-06 21:09:19,334 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 48 treesize of output 40 [2021-12-06 21:09:19,559 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 18 proven. 69 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2021-12-06 21:09:19,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:09:24,420 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_aws_mul_size_checked_aws_mul_u64_checked_~b#1_23| Int) (|v_aws_mul_size_checked_#in~r#1.base_15| Int)) (let ((.cse2 (* |v_aws_mul_size_checked_aws_mul_u64_checked_~b#1_23| (select (select |c_#memory_int| |c_ULTIMATE.start_aws_array_list_init_static_~list#1.base|) (+ 16 |c_ULTIMATE.start_aws_array_list_init_static_~list#1.offset|))))) (let ((.cse1 (select (store |c_#memory_int| |v_aws_mul_size_checked_#in~r#1.base_15| (store (select |c_#memory_int| |v_aws_mul_size_checked_#in~r#1.base_15|) 0 .cse2)) |c_ULTIMATE.start_aws_array_list_init_static_~list#1.base|))) (let ((.cse0 (mod (select .cse1 (+ |c_ULTIMATE.start_aws_array_list_init_static_~list#1.offset| 8)) 18446744073709551616))) (or (= .cse0 0) (and (not (= (mod (select .cse1 (+ |c_ULTIMATE.start_aws_array_list_init_static_~list#1.offset| 24)) 18446744073709551616) 0)) (forall ((v_ArrVal_1575 Int)) (not (= (select (select (store |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_#in~r#1.base_15| (store (select |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_#in~r#1.base_15|) 0 v_ArrVal_1575)) |c_ULTIMATE.start_aws_array_list_init_static_~list#1.base|) (+ 32 |c_ULTIMATE.start_aws_array_list_init_static_~list#1.offset|)) 0))) (<= (mod .cse2 18446744073709551616) .cse0))))))) is different from false [2021-12-06 21:09:24,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:09:24,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797749369] [2021-12-06 21:09:24,445 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:09:24,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940041816] [2021-12-06 21:09:24,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940041816] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:09:24,445 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:09:24,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-12-06 21:09:24,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495929209] [2021-12-06 21:09:24,446 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 21:09:24,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 21:09:24,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:09:24,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 21:09:24,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=914, Unknown=3, NotChecked=60, Total=1056 [2021-12-06 21:09:24,447 INFO L87 Difference]: Start difference. First operand 150 states and 192 transitions. Second operand has 29 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 10 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2021-12-06 21:09:25,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:09:25,605 INFO L93 Difference]: Finished difference Result 202 states and 267 transitions. [2021-12-06 21:09:25,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 21:09:25,605 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 10 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) Word has length 149 [2021-12-06 21:09:25,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:09:25,607 INFO L225 Difference]: With dead ends: 202 [2021-12-06 21:09:25,607 INFO L226 Difference]: Without dead ends: 200 [2021-12-06 21:09:25,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=137, Invalid=1586, Unknown=3, NotChecked=80, Total=1806 [2021-12-06 21:09:25,608 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 115 mSDsluCounter, 1742 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1883 SdHoareTripleChecker+Invalid, 2153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 810 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 21:09:25,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 1883 Invalid, 2153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1253 Invalid, 0 Unknown, 810 Unchecked, 0.8s Time] [2021-12-06 21:09:25,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-06 21:09:25,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 167. [2021-12-06 21:09:25,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 113 states have internal predecessors, (127), 40 states have call successors, (40), 13 states have call predecessors, (40), 16 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2021-12-06 21:09:25,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 214 transitions. [2021-12-06 21:09:25,617 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 214 transitions. Word has length 149 [2021-12-06 21:09:25,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:09:25,618 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 214 transitions. [2021-12-06 21:09:25,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 10 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2021-12-06 21:09:25,618 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 214 transitions. [2021-12-06 21:09:25,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-06 21:09:25,619 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:09:25,619 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:25,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 21:09:25,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:09:25,821 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:09:25,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:09:25,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1264090376, now seen corresponding path program 1 times [2021-12-06 21:09:25,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:09:25,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909379457] [2021-12-06 21:09:25,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:09:25,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:09:25,889 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:09:25,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [489860135] [2021-12-06 21:09:25,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:09:25,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:09:25,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:09:25,891 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:09:25,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 21:09:26,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:26,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 2528 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 21:09:26,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:09:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 198 proven. 4 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-12-06 21:09:26,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:09:26,761 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-12-06 21:09:26,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:09:26,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909379457] [2021-12-06 21:09:26,761 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:09:26,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489860135] [2021-12-06 21:09:26,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489860135] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:09:26,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:09:26,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-12-06 21:09:26,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287081728] [2021-12-06 21:09:26,762 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:09:26,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 21:09:26,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:09:26,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 21:09:26,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-06 21:09:26,763 INFO L87 Difference]: Start difference. First operand 167 states and 214 transitions. Second operand has 15 states, 13 states have (on average 6.0) internal successors, (78), 15 states have internal predecessors, (78), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2021-12-06 21:09:26,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:09:26,877 INFO L93 Difference]: Finished difference Result 306 states and 389 transitions. [2021-12-06 21:09:26,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 21:09:26,878 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 6.0) internal successors, (78), 15 states have internal predecessors, (78), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) Word has length 149 [2021-12-06 21:09:26,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:09:26,880 INFO L225 Difference]: With dead ends: 306 [2021-12-06 21:09:26,880 INFO L226 Difference]: Without dead ends: 170 [2021-12-06 21:09:26,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-12-06 21:09:26,881 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 32 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:09:26,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1219 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:09:26,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-12-06 21:09:26,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2021-12-06 21:09:26,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 112 states have (on average 1.1517857142857142) internal successors, (129), 115 states have internal predecessors, (129), 40 states have call successors, (40), 13 states have call predecessors, (40), 16 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2021-12-06 21:09:26,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 216 transitions. [2021-12-06 21:09:26,889 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 216 transitions. Word has length 149 [2021-12-06 21:09:26,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:09:26,890 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 216 transitions. [2021-12-06 21:09:26,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 6.0) internal successors, (78), 15 states have internal predecessors, (78), 6 states have call successors, (34), 2 states have call predecessors, (34), 5 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2021-12-06 21:09:26,890 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 216 transitions. [2021-12-06 21:09:26,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-06 21:09:26,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:09:26,891 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:26,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 21:09:27,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 21:09:27,092 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:09:27,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:09:27,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1175064586, now seen corresponding path program 2 times [2021-12-06 21:09:27,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:09:27,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793032570] [2021-12-06 21:09:27,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:09:27,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:09:27,176 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:09:27,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1598266175] [2021-12-06 21:09:27,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:09:27,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:09:27,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:09:27,177 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:09:27,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 21:09:29,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:09:29,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:09:29,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 2547 conjuncts, 116 conjunts are in the unsatisfiable core [2021-12-06 21:09:29,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:09:29,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:09:29,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:09:29,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:09:29,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 32 [2021-12-06 21:09:37,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:09:37,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 123 treesize of output 71 [2021-12-06 21:09:37,347 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 33 proven. 18 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2021-12-06 21:09:37,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:09:48,305 WARN L227 SmtUtils]: Spent 7.70s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 271] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-12-06 21:10:03,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:03,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793032570] [2021-12-06 21:10:03,309 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:10:03,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598266175] [2021-12-06 21:10:03,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598266175] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:10:03,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:10:03,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-12-06 21:10:03,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134443076] [2021-12-06 21:10:03,309 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 21:10:03,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 21:10:03,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:03,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 21:10:03,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=692, Unknown=0, NotChecked=0, Total=756 [2021-12-06 21:10:03,311 INFO L87 Difference]: Start difference. First operand 169 states and 216 transitions. Second operand has 24 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 9 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2021-12-06 21:10:06,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:06,057 INFO L93 Difference]: Finished difference Result 233 states and 311 transitions. [2021-12-06 21:10:06,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 21:10:06,057 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 9 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) Word has length 151 [2021-12-06 21:10:06,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:06,059 INFO L225 Difference]: With dead ends: 233 [2021-12-06 21:10:06,059 INFO L226 Difference]: Without dead ends: 231 [2021-12-06 21:10:06,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=141, Invalid=1419, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 21:10:06,060 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 167 mSDsluCounter, 1852 mSDsCounter, 0 mSdLazyCounter, 1613 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 2023 SdHoareTripleChecker+Invalid, 2692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 938 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:06,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 2023 Invalid, 2692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1613 Invalid, 0 Unknown, 938 Unchecked, 1.3s Time] [2021-12-06 21:10:06,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-12-06 21:10:06,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 172. [2021-12-06 21:10:06,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 115 states have (on average 1.1652173913043478) internal successors, (134), 118 states have internal predecessors, (134), 40 states have call successors, (40), 13 states have call predecessors, (40), 16 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2021-12-06 21:10:06,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 221 transitions. [2021-12-06 21:10:06,070 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 221 transitions. Word has length 151 [2021-12-06 21:10:06,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:06,071 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 221 transitions. [2021-12-06 21:10:06,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 9 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2021-12-06 21:10:06,071 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 221 transitions. [2021-12-06 21:10:06,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-06 21:10:06,072 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:06,072 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:06,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 21:10:06,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:06,273 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:10:06,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:06,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1855122956, now seen corresponding path program 1 times [2021-12-06 21:10:06,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:06,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401379893] [2021-12-06 21:10:06,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:06,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:06,342 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:10:06,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498589286] [2021-12-06 21:10:06,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:06,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:06,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:10:06,343 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:10:06,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 21:10:06,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:06,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 2552 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 21:10:06,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:06,760 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-12-06 21:10:06,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:10:06,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:06,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401379893] [2021-12-06 21:10:06,760 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:10:06,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498589286] [2021-12-06 21:10:06,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498589286] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:06,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:06,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:10:06,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839469364] [2021-12-06 21:10:06,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:06,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:10:06,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:06,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:10:06,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:10:06,762 INFO L87 Difference]: Start difference. First operand 172 states and 221 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2021-12-06 21:10:06,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:06,906 INFO L93 Difference]: Finished difference Result 297 states and 384 transitions. [2021-12-06 21:10:06,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:10:06,907 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) Word has length 151 [2021-12-06 21:10:06,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:06,908 INFO L225 Difference]: With dead ends: 297 [2021-12-06 21:10:06,908 INFO L226 Difference]: Without dead ends: 182 [2021-12-06 21:10:06,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:10:06,909 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 13 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:06,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 668 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:10:06,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-12-06 21:10:06,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 172. [2021-12-06 21:10:06,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 115 states have (on average 1.1478260869565218) internal successors, (132), 118 states have internal predecessors, (132), 40 states have call successors, (40), 13 states have call predecessors, (40), 16 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2021-12-06 21:10:06,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 219 transitions. [2021-12-06 21:10:06,918 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 219 transitions. Word has length 151 [2021-12-06 21:10:06,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:06,918 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 219 transitions. [2021-12-06 21:10:06,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2021-12-06 21:10:06,919 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 219 transitions. [2021-12-06 21:10:06,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 21:10:06,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:06,920 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:06,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 21:10:07,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 21:10:07,121 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:10:07,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:07,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1806751856, now seen corresponding path program 1 times [2021-12-06 21:10:07,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:07,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958351152] [2021-12-06 21:10:07,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:07,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:07,195 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:10:07,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976435662] [2021-12-06 21:10:07,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:07,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:07,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:10:07,196 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:10:07,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 21:10:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:07,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 2551 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 21:10:07,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 198 proven. 9 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-12-06 21:10:07,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:10:08,075 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-12-06 21:10:08,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:08,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958351152] [2021-12-06 21:10:08,075 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:10:08,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976435662] [2021-12-06 21:10:08,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976435662] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:10:08,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:10:08,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-12-06 21:10:08,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435811716] [2021-12-06 21:10:08,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:10:08,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 21:10:08,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:08,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 21:10:08,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-12-06 21:10:08,077 INFO L87 Difference]: Start difference. First operand 172 states and 219 transitions. Second operand has 17 states, 15 states have (on average 6.133333333333334) internal successors, (92), 17 states have internal predecessors, (92), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-12-06 21:10:08,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:08,237 INFO L93 Difference]: Finished difference Result 314 states and 397 transitions. [2021-12-06 21:10:08,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 21:10:08,238 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 6.133333333333334) internal successors, (92), 17 states have internal predecessors, (92), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 157 [2021-12-06 21:10:08,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:08,239 INFO L225 Difference]: With dead ends: 314 [2021-12-06 21:10:08,239 INFO L226 Difference]: Without dead ends: 175 [2021-12-06 21:10:08,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-12-06 21:10:08,240 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 29 mSDsluCounter, 1734 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1910 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:08,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 1910 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:10:08,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-06 21:10:08,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2021-12-06 21:10:08,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 117 states have (on average 1.1452991452991452) internal successors, (134), 120 states have internal predecessors, (134), 40 states have call successors, (40), 13 states have call predecessors, (40), 16 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2021-12-06 21:10:08,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 221 transitions. [2021-12-06 21:10:08,248 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 221 transitions. Word has length 157 [2021-12-06 21:10:08,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:08,249 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 221 transitions. [2021-12-06 21:10:08,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 6.133333333333334) internal successors, (92), 17 states have internal predecessors, (92), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-12-06 21:10:08,249 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 221 transitions. [2021-12-06 21:10:08,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-06 21:10:08,250 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:08,250 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:08,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 21:10:08,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 21:10:08,451 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:10:08,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:08,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1035560814, now seen corresponding path program 2 times [2021-12-06 21:10:08,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:08,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62646032] [2021-12-06 21:10:08,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:08,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:08,485 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:10:08,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972720031] [2021-12-06 21:10:08,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:10:08,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:08,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:10:08,486 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:10:08,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 21:10:09,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:10:09,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:10:09,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 2570 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 21:10:09,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:09,776 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 198 proven. 16 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-12-06 21:10:09,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:10:10,202 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-12-06 21:10:10,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:10,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62646032] [2021-12-06 21:10:10,202 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:10:10,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972720031] [2021-12-06 21:10:10,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972720031] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:10:10,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:10:10,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-12-06 21:10:10,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482236598] [2021-12-06 21:10:10,203 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:10:10,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 21:10:10,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:10,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 21:10:10,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-12-06 21:10:10,204 INFO L87 Difference]: Start difference. First operand 174 states and 221 transitions. Second operand has 19 states, 17 states have (on average 5.647058823529412) internal successors, (96), 19 states have internal predecessors, (96), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-12-06 21:10:10,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:10,367 INFO L93 Difference]: Finished difference Result 316 states and 399 transitions. [2021-12-06 21:10:10,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 21:10:10,368 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 5.647058823529412) internal successors, (96), 19 states have internal predecessors, (96), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 159 [2021-12-06 21:10:10,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:10,369 INFO L225 Difference]: With dead ends: 316 [2021-12-06 21:10:10,369 INFO L226 Difference]: Without dead ends: 177 [2021-12-06 21:10:10,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-12-06 21:10:10,371 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 37 mSDsluCounter, 1733 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1909 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:10,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 1909 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:10:10,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-06 21:10:10,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2021-12-06 21:10:10,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 119 states have (on average 1.1428571428571428) internal successors, (136), 122 states have internal predecessors, (136), 40 states have call successors, (40), 13 states have call predecessors, (40), 16 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2021-12-06 21:10:10,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 223 transitions. [2021-12-06 21:10:10,379 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 223 transitions. Word has length 159 [2021-12-06 21:10:10,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:10,379 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 223 transitions. [2021-12-06 21:10:10,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 5.647058823529412) internal successors, (96), 19 states have internal predecessors, (96), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-12-06 21:10:10,379 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 223 transitions. [2021-12-06 21:10:10,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-06 21:10:10,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:10,380 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:10,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 21:10:10,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 21:10:10,582 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:10:10,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:10,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1344655636, now seen corresponding path program 3 times [2021-12-06 21:10:10,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:10,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783235361] [2021-12-06 21:10:10,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:10,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:10,671 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:10:10,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1554506280] [2021-12-06 21:10:10,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 21:10:10,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:10,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:10:10,672 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:10:10,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 21:10:46,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-12-06 21:10:46,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:10:46,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 2508 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 21:10:46,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:46,480 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 198 proven. 25 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-12-06 21:10:46,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:10:46,947 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-12-06 21:10:46,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:46,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783235361] [2021-12-06 21:10:46,947 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:10:46,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554506280] [2021-12-06 21:10:46,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554506280] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:10:46,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:10:46,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-12-06 21:10:46,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560763015] [2021-12-06 21:10:46,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:10:46,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 21:10:46,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:46,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 21:10:46,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-12-06 21:10:46,949 INFO L87 Difference]: Start difference. First operand 176 states and 223 transitions. Second operand has 21 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 21 states have internal predecessors, (100), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-12-06 21:10:47,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:47,176 INFO L93 Difference]: Finished difference Result 318 states and 401 transitions. [2021-12-06 21:10:47,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 21:10:47,177 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 21 states have internal predecessors, (100), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 161 [2021-12-06 21:10:47,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:47,178 INFO L225 Difference]: With dead ends: 318 [2021-12-06 21:10:47,179 INFO L226 Difference]: Without dead ends: 179 [2021-12-06 21:10:47,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-12-06 21:10:47,180 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 47 mSDsluCounter, 1912 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 2088 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:47,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 2088 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 21:10:47,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-12-06 21:10:47,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2021-12-06 21:10:47,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 121 states have (on average 1.140495867768595) internal successors, (138), 124 states have internal predecessors, (138), 40 states have call successors, (40), 13 states have call predecessors, (40), 16 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2021-12-06 21:10:47,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 225 transitions. [2021-12-06 21:10:47,188 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 225 transitions. Word has length 161 [2021-12-06 21:10:47,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:47,189 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 225 transitions. [2021-12-06 21:10:47,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 21 states have internal predecessors, (100), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-12-06 21:10:47,189 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 225 transitions. [2021-12-06 21:10:47,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-06 21:10:47,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:47,190 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 6, 6, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:47,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 21:10:47,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 21:10:47,391 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:10:47,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:47,392 INFO L85 PathProgramCache]: Analyzing trace with hash -484904682, now seen corresponding path program 4 times [2021-12-06 21:10:47,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:47,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602230922] [2021-12-06 21:10:47,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:47,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:47,438 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:10:47,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [237013990] [2021-12-06 21:10:47,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 21:10:47,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:47,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:10:47,439 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:10:47,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 21:10:48,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 21:10:48,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:10:48,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 2608 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 21:10:48,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:48,334 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 198 proven. 36 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-12-06 21:10:48,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:10:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-12-06 21:10:48,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:48,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602230922] [2021-12-06 21:10:48,865 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:10:48,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237013990] [2021-12-06 21:10:48,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237013990] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:10:48,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:10:48,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-12-06 21:10:48,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176000608] [2021-12-06 21:10:48,865 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:10:48,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 21:10:48,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:48,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 21:10:48,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-12-06 21:10:48,866 INFO L87 Difference]: Start difference. First operand 178 states and 225 transitions. Second operand has 23 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 23 states have internal predecessors, (104), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-12-06 21:10:49,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:49,145 INFO L93 Difference]: Finished difference Result 320 states and 403 transitions. [2021-12-06 21:10:49,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 21:10:49,146 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 23 states have internal predecessors, (104), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 163 [2021-12-06 21:10:49,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:49,148 INFO L225 Difference]: With dead ends: 320 [2021-12-06 21:10:49,148 INFO L226 Difference]: Without dead ends: 181 [2021-12-06 21:10:49,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-12-06 21:10:49,149 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 52 mSDsluCounter, 2085 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 2261 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:49,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 2261 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 21:10:49,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-12-06 21:10:49,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2021-12-06 21:10:49,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 123 states have (on average 1.1382113821138211) internal successors, (140), 126 states have internal predecessors, (140), 40 states have call successors, (40), 13 states have call predecessors, (40), 16 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2021-12-06 21:10:49,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 227 transitions. [2021-12-06 21:10:49,157 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 227 transitions. Word has length 163 [2021-12-06 21:10:49,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:49,157 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 227 transitions. [2021-12-06 21:10:49,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 23 states have internal predecessors, (104), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-12-06 21:10:49,157 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 227 transitions. [2021-12-06 21:10:49,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-06 21:10:49,158 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:49,158 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 7, 7, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:49,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-06 21:10:49,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 21:10:49,359 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:10:49,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:49,359 INFO L85 PathProgramCache]: Analyzing trace with hash -2050746216, now seen corresponding path program 5 times [2021-12-06 21:10:49,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:49,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911879123] [2021-12-06 21:10:49,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:49,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:49,393 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:10:49,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424140855] [2021-12-06 21:10:49,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 21:10:49,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:49,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:10:49,394 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:10:49,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 21:10:52,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-06 21:10:52,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:10:52,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 21:10:52,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 198 proven. 49 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-12-06 21:10:52,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:10:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-12-06 21:10:52,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:52,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911879123] [2021-12-06 21:10:52,961 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:10:52,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424140855] [2021-12-06 21:10:52,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424140855] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:10:52,961 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:10:52,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-12-06 21:10:52,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848601976] [2021-12-06 21:10:52,961 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:10:52,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 21:10:52,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:52,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 21:10:52,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-12-06 21:10:52,962 INFO L87 Difference]: Start difference. First operand 180 states and 227 transitions. Second operand has 25 states, 23 states have (on average 4.695652173913044) internal successors, (108), 25 states have internal predecessors, (108), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-12-06 21:10:53,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:53,274 INFO L93 Difference]: Finished difference Result 322 states and 405 transitions. [2021-12-06 21:10:53,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 21:10:53,275 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 4.695652173913044) internal successors, (108), 25 states have internal predecessors, (108), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 165 [2021-12-06 21:10:53,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:53,276 INFO L225 Difference]: With dead ends: 322 [2021-12-06 21:10:53,276 INFO L226 Difference]: Without dead ends: 183 [2021-12-06 21:10:53,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-12-06 21:10:53,278 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 65 mSDsluCounter, 1917 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2093 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:53,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2093 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 21:10:53,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-12-06 21:10:53,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2021-12-06 21:10:53,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 125 states have (on average 1.136) internal successors, (142), 128 states have internal predecessors, (142), 40 states have call successors, (40), 13 states have call predecessors, (40), 16 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2021-12-06 21:10:53,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 229 transitions. [2021-12-06 21:10:53,286 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 229 transitions. Word has length 165 [2021-12-06 21:10:53,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:53,286 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 229 transitions. [2021-12-06 21:10:53,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 4.695652173913044) internal successors, (108), 25 states have internal predecessors, (108), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-12-06 21:10:53,287 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 229 transitions. [2021-12-06 21:10:53,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-06 21:10:53,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:53,288 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:53,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 21:10:53,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 21:10:53,488 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:10:53,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:53,489 INFO L85 PathProgramCache]: Analyzing trace with hash 709060506, now seen corresponding path program 6 times [2021-12-06 21:10:53,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:53,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919693244] [2021-12-06 21:10:53,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:53,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:53,529 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:10:53,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857916228] [2021-12-06 21:10:53,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 21:10:53,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:53,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:10:53,530 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:10:53,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 21:17:54,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-12-06 21:17:54,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:17:55,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 2646 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 21:17:55,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:17:55,666 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 198 proven. 64 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-12-06 21:17:55,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:17:56,401 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-12-06 21:17:56,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:17:56,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919693244] [2021-12-06 21:17:56,401 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:17:56,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857916228] [2021-12-06 21:17:56,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857916228] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:17:56,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:17:56,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-12-06 21:17:56,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581116912] [2021-12-06 21:17:56,402 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:17:56,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 21:17:56,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:17:56,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 21:17:56,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-12-06 21:17:56,403 INFO L87 Difference]: Start difference. First operand 182 states and 229 transitions. Second operand has 27 states, 25 states have (on average 4.48) internal successors, (112), 27 states have internal predecessors, (112), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-12-06 21:17:56,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:17:56,771 INFO L93 Difference]: Finished difference Result 324 states and 407 transitions. [2021-12-06 21:17:56,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 21:17:56,772 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 4.48) internal successors, (112), 27 states have internal predecessors, (112), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 167 [2021-12-06 21:17:56,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:17:56,773 INFO L225 Difference]: With dead ends: 324 [2021-12-06 21:17:56,773 INFO L226 Difference]: Without dead ends: 185 [2021-12-06 21:17:56,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2021-12-06 21:17:56,774 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 70 mSDsluCounter, 2436 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 2612 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:17:56,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 2612 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 21:17:56,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-06 21:17:56,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2021-12-06 21:17:56,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 130 states have internal predecessors, (144), 40 states have call successors, (40), 13 states have call predecessors, (40), 16 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2021-12-06 21:17:56,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 231 transitions. [2021-12-06 21:17:56,789 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 231 transitions. Word has length 167 [2021-12-06 21:17:56,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:17:56,790 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 231 transitions. [2021-12-06 21:17:56,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 4.48) internal successors, (112), 27 states have internal predecessors, (112), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-12-06 21:17:56,790 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 231 transitions. [2021-12-06 21:17:56,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-06 21:17:56,791 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:17:56,791 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 9, 9, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:17:56,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 21:17:56,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:17:56,991 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:17:56,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:17:56,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1406468580, now seen corresponding path program 7 times [2021-12-06 21:17:56,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:17:56,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698614758] [2021-12-06 21:17:56,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:17:56,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:17:57,026 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:17:57,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269377352] [2021-12-06 21:17:57,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 21:17:57,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:17:57,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:17:57,028 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:17:57,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 21:17:57,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:17:57,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 2665 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 21:17:57,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:17:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 198 proven. 81 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-12-06 21:17:58,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:17:58,736 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-12-06 21:17:58,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:17:58,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698614758] [2021-12-06 21:17:58,736 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:17:58,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269377352] [2021-12-06 21:17:58,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269377352] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:17:58,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:17:58,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-12-06 21:17:58,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579793747] [2021-12-06 21:17:58,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:17:58,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 21:17:58,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:17:58,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 21:17:58,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-12-06 21:17:58,738 INFO L87 Difference]: Start difference. First operand 184 states and 231 transitions. Second operand has 29 states, 27 states have (on average 4.296296296296297) internal successors, (116), 29 states have internal predecessors, (116), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-12-06 21:17:59,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:17:59,163 INFO L93 Difference]: Finished difference Result 326 states and 409 transitions. [2021-12-06 21:17:59,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 21:17:59,164 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 4.296296296296297) internal successors, (116), 29 states have internal predecessors, (116), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 169 [2021-12-06 21:17:59,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:17:59,165 INFO L225 Difference]: With dead ends: 326 [2021-12-06 21:17:59,165 INFO L226 Difference]: Without dead ends: 187 [2021-12-06 21:17:59,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2021-12-06 21:17:59,167 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 57 mSDsluCounter, 2783 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 2959 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:17:59,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 2959 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 21:17:59,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-06 21:17:59,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2021-12-06 21:17:59,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 129 states have (on average 1.1317829457364341) internal successors, (146), 132 states have internal predecessors, (146), 40 states have call successors, (40), 13 states have call predecessors, (40), 16 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2021-12-06 21:17:59,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 233 transitions. [2021-12-06 21:17:59,175 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 233 transitions. Word has length 169 [2021-12-06 21:17:59,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:17:59,175 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 233 transitions. [2021-12-06 21:17:59,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 4.296296296296297) internal successors, (116), 29 states have internal predecessors, (116), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-12-06 21:17:59,175 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 233 transitions. [2021-12-06 21:17:59,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-12-06 21:17:59,176 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:17:59,176 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 10, 10, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:17:59,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 21:17:59,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:17:59,377 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:17:59,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:17:59,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1384578078, now seen corresponding path program 8 times [2021-12-06 21:17:59,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:17:59,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817337242] [2021-12-06 21:17:59,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:17:59,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:17:59,453 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:17:59,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006996888] [2021-12-06 21:17:59,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:17:59,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:17:59,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:17:59,454 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:17:59,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 21:18:00,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:18:00,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:18:00,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 2684 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 21:18:00,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:18:00,582 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 198 proven. 100 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-12-06 21:18:00,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:18:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-12-06 21:18:01,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:18:01,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817337242] [2021-12-06 21:18:01,477 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 21:18:01,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006996888] [2021-12-06 21:18:01,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006996888] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:18:01,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:18:01,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-12-06 21:18:01,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196995634] [2021-12-06 21:18:01,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:18:01,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 21:18:01,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:18:01,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 21:18:01,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-12-06 21:18:01,479 INFO L87 Difference]: Start difference. First operand 186 states and 233 transitions. Second operand has 31 states, 29 states have (on average 4.137931034482759) internal successors, (120), 31 states have internal predecessors, (120), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-12-06 21:18:01,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:18:01,890 INFO L93 Difference]: Finished difference Result 328 states and 411 transitions. [2021-12-06 21:18:01,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 21:18:01,892 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 4.137931034482759) internal successors, (120), 31 states have internal predecessors, (120), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 171 [2021-12-06 21:18:01,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:18:01,893 INFO L225 Difference]: With dead ends: 328 [2021-12-06 21:18:01,893 INFO L226 Difference]: Without dead ends: 189 [2021-12-06 21:18:01,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 21:18:01,894 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 84 mSDsluCounter, 2268 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 2444 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:18:01,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 2444 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 21:18:01,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-12-06 21:18:01,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2021-12-06 21:18:01,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 131 states have (on average 1.1297709923664123) internal successors, (148), 134 states have internal predecessors, (148), 40 states have call successors, (40), 13 states have call predecessors, (40), 16 states have return successors, (47), 40 states have call predecessors, (47), 39 states have call successors, (47) [2021-12-06 21:18:01,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 235 transitions. [2021-12-06 21:18:01,902 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 235 transitions. Word has length 171 [2021-12-06 21:18:01,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:18:01,902 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 235 transitions. [2021-12-06 21:18:01,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 4.137931034482759) internal successors, (120), 31 states have internal predecessors, (120), 6 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-12-06 21:18:01,902 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 235 transitions. [2021-12-06 21:18:01,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-06 21:18:01,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:18:01,903 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:18:01,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 21:18:02,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-06 21:18:02,105 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:18:02,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:18:02,106 INFO L85 PathProgramCache]: Analyzing trace with hash -774143584, now seen corresponding path program 9 times [2021-12-06 21:18:02,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:18:02,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793549791] [2021-12-06 21:18:02,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:18:02,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:18:02,168 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 21:18:02,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954079162] [2021-12-06 21:18:02,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 21:18:02,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:18:02,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:18:02,170 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:18:02,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b16723c-6943-4654-8a35-0df6092db71a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process