./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF --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 efb3bc3d53d5de978717fadeb26804aec5f97721ade955fc2d1463ef24ff6010 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:49:45,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:49:45,333 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:49:45,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:49:45,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:49:45,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:49:45,382 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:49:45,385 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:49:45,388 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:49:45,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:49:45,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:49:45,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:49:45,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:49:45,396 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:49:45,398 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:49:45,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:49:45,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:49:45,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:49:45,406 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:49:45,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:49:45,411 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:49:45,413 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:49:45,415 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:49:45,417 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:49:45,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:49:45,427 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:49:45,428 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:49:45,429 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:49:45,434 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:49:45,436 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:49:45,438 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:49:45,439 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:49:45,441 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:49:45,443 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:49:45,445 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:49:45,446 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:49:45,447 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:49:45,447 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:49:45,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:49:45,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:49:45,450 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:49:45,452 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-20 06:49:45,515 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:49:45,516 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:49:45,518 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:49:45,518 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:49:45,520 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:49:45,520 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:49:45,526 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:49:45,526 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:49:45,526 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:49:45,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:49:45,526 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:49:45,527 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:49:45,527 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:49:45,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:49:45,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:49:45,532 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:49:45,533 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:49:45,533 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:49:45,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:49:45,534 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:49:45,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:49:45,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:49:45,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:49:45,536 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:49:45,537 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:49:45,537 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:49:45,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:49:45,538 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:49:45,538 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:49:45,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:49:45,539 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:49:45,539 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_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efb3bc3d53d5de978717fadeb26804aec5f97721ade955fc2d1463ef24ff6010 [2021-11-20 06:49:45,860 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:49:45,888 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:49:45,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:49:45,893 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:49:45,894 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:49:45,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i [2021-11-20 06:49:45,992 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/data/908eaa002/aee859754ae843a687711ccfbb9f8de3/FLAGbccedab92 [2021-11-20 06:49:46,928 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:49:46,931 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i [2021-11-20 06:49:46,995 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/data/908eaa002/aee859754ae843a687711ccfbb9f8de3/FLAGbccedab92 [2021-11-20 06:49:47,366 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/data/908eaa002/aee859754ae843a687711ccfbb9f8de3 [2021-11-20 06:49:47,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:49:47,370 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:49:47,372 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:49:47,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:49:47,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:49:47,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:49:47" (1/1) ... [2021-11-20 06:49:47,379 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e9a0bdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:47, skipping insertion in model container [2021-11-20 06:49:47,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:49:47" (1/1) ... [2021-11-20 06:49:47,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:49:47,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:49:47,921 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_27f1df01-5736-458c-bb24-ba230f13afe0/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4501,4514] [2021-11-20 06:49:47,930 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_27f1df01-5736-458c-bb24-ba230f13afe0/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4561,4574] [2021-11-20 06:49:48,999 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 06:49:49,090 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:49:49,091 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:49:49,092 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:49:49,093 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:49:49,095 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:49:49,112 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:49:49,113 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:49:49,116 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:49:49,117 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:49:49,627 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 06:49:49,628 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 06:49:49,629 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 06:49:49,631 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 06:49:49,633 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 06:49:49,634 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 06:49:49,635 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 06:49:49,636 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 06:49:49,637 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 06:49:49,637 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 06:49:49,831 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:49:49,832 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:49:49,909 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:49:49,957 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:49:50,028 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_27f1df01-5736-458c-bb24-ba230f13afe0/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4501,4514] [2021-11-20 06:49:50,029 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_27f1df01-5736-458c-bb24-ba230f13afe0/sv-benchmarks/c/aws-c-common/aws_priority_queue_clean_up_harness.i[4561,4574] [2021-11-20 06:49:50,134 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 06:49:50,152 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:49:50,153 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:49:50,153 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:49:50,154 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:49:50,155 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:49:50,164 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:49:50,164 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:49:50,166 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:49:50,166 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:49:50,216 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 06:49:50,219 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 06:49:50,221 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 06:49:50,223 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 06:49:50,228 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 06:49:50,230 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 06:49:50,231 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 06:49:50,232 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 06:49:50,233 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 06:49:50,234 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 06:49:50,303 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:49:50,306 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:49:50,361 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:49:50,707 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:49:50,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:50 WrapperNode [2021-11-20 06:49:50,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:49:50,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:49:50,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:49:50,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:49:50,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:50" (1/1) ... [2021-11-20 06:49:50,863 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:50" (1/1) ... [2021-11-20 06:49:50,969 INFO L137 Inliner]: procedures = 689, calls = 1497, calls flagged for inlining = 55, calls inlined = 9, statements flattened = 598 [2021-11-20 06:49:50,970 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:49:50,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:49:50,971 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:49:50,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:49:50,980 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:50" (1/1) ... [2021-11-20 06:49:50,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:50" (1/1) ... [2021-11-20 06:49:50,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:50" (1/1) ... [2021-11-20 06:49:50,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:50" (1/1) ... [2021-11-20 06:49:51,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:50" (1/1) ... [2021-11-20 06:49:51,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:50" (1/1) ... [2021-11-20 06:49:51,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:50" (1/1) ... [2021-11-20 06:49:51,078 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:49:51,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:49:51,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:49:51,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:49:51,080 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:50" (1/1) ... [2021-11-20 06:49:51,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:49:51,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:49:51,146 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:49:51,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:49:51,213 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-11-20 06:49:51,213 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-11-20 06:49:51,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:49:51,214 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2021-11-20 06:49:51,214 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2021-11-20 06:49:51,214 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2021-11-20 06:49:51,215 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2021-11-20 06:49:51,215 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-20 06:49:51,215 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-20 06:49:51,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:49:51,216 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-20 06:49:51,218 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-20 06:49:51,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 06:49:51,219 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 06:49:51,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 06:49:51,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:49:51,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 06:49:51,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:49:51,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:49:51,221 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_clean_up [2021-11-20 06:49:51,221 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_clean_up [2021-11-20 06:49:51,222 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-20 06:49:51,222 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-20 06:49:51,222 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-11-20 06:49:51,223 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-11-20 06:49:51,223 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2021-11-20 06:49:51,223 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2021-11-20 06:49:51,223 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2021-11-20 06:49:51,223 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2021-11-20 06:49:51,223 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 06:49:51,224 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 06:49:51,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:49:51,225 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 06:49:51,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 06:49:51,225 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-20 06:49:51,225 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-20 06:49:51,226 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-11-20 06:49:51,226 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-11-20 06:49:51,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:49:51,226 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2021-11-20 06:49:51,227 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2021-11-20 06:49:51,227 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2021-11-20 06:49:51,227 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2021-11-20 06:49:51,227 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2021-11-20 06:49:51,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2021-11-20 06:49:51,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:49:51,642 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:49:51,645 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:49:53,026 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:49:53,040 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:49:53,040 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-20 06:49:53,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:49:53 BoogieIcfgContainer [2021-11-20 06:49:53,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:49:53,046 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:49:53,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:49:53,051 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:49:53,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:49:47" (1/3) ... [2021-11-20 06:49:53,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8033fea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:49:53, skipping insertion in model container [2021-11-20 06:49:53,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:50" (2/3) ... [2021-11-20 06:49:53,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8033fea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:49:53, skipping insertion in model container [2021-11-20 06:49:53,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:49:53" (3/3) ... [2021-11-20 06:49:53,058 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_clean_up_harness.i [2021-11-20 06:49:53,069 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:49:53,069 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:49:53,136 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:49:53,145 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 [2021-11-20 06:49:53,145 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:49:53,173 INFO L276 IsEmpty]: Start isEmpty. Operand has 165 states, 112 states have (on average 1.2678571428571428) internal successors, (142), 113 states have internal predecessors, (142), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-11-20 06:49:53,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-20 06:49:53,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:49:53,192 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:49:53,193 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:49:53,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:49:53,200 INFO L85 PathProgramCache]: Analyzing trace with hash 432166812, now seen corresponding path program 1 times [2021-11-20 06:49:53,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:49:53,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819877926] [2021-11-20 06:49:53,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:53,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:49:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:53,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:49:53,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:54,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:49:54,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:54,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:49:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:54,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:49:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:54,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:49:54,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:54,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:49:54,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:54,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:49:54,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:54,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:49:54,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:54,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:49:54,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:54,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 06:49:54,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:54,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 06:49:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:54,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:49:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:54,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:49:54,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:54,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:49:54,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:54,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 06:49:54,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:54,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-20 06:49:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-20 06:49:54,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:49:54,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819877926] [2021-11-20 06:49:54,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819877926] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:49:54,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:49:54,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:49:54,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199065050] [2021-11-20 06:49:54,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:49:54,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:49:54,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:49:54,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:49:54,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:49:54,515 INFO L87 Difference]: Start difference. First operand has 165 states, 112 states have (on average 1.2678571428571428) internal successors, (142), 113 states have internal predecessors, (142), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 06:49:55,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:49:55,304 INFO L93 Difference]: Finished difference Result 361 states and 504 transitions. [2021-11-20 06:49:55,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:49:55,307 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 105 [2021-11-20 06:49:55,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:49:55,324 INFO L225 Difference]: With dead ends: 361 [2021-11-20 06:49:55,324 INFO L226 Difference]: Without dead ends: 202 [2021-11-20 06:49:55,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:49:55,336 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 89 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:49:55,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 305 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:49:55,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-20 06:49:55,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 160. [2021-11-20 06:49:55,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 107 states have (on average 1.233644859813084) internal successors, (132), 109 states have internal predecessors, (132), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-20 06:49:55,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 201 transitions. [2021-11-20 06:49:55,446 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 201 transitions. Word has length 105 [2021-11-20 06:49:55,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:49:55,447 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 201 transitions. [2021-11-20 06:49:55,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 06:49:55,451 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 201 transitions. [2021-11-20 06:49:55,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-20 06:49:55,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:49:55,470 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:49:55,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:49:55,472 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:49:55,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:49:55,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1130672400, now seen corresponding path program 1 times [2021-11-20 06:49:55,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:49:55,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724219550] [2021-11-20 06:49:55,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:55,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:49:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:55,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:49:55,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:55,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:49:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:55,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:49:55,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:55,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:49:55,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:55,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:49:55,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:55,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:49:55,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:55,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:49:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:56,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:49:56,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:56,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:49:56,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:56,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 06:49:56,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:56,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 06:49:56,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:56,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:49:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:56,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:49:56,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:56,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:49:56,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:56,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 06:49:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:56,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:49:56,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:56,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:49:56,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:56,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-20 06:49:56,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:56,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-11-20 06:49:56,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:56,327 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-20 06:49:56,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:49:56,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724219550] [2021-11-20 06:49:56,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724219550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:49:56,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:49:56,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:49:56,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031935841] [2021-11-20 06:49:56,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:49:56,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:49:56,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:49:56,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:49:56,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:49:56,334 INFO L87 Difference]: Start difference. First operand 160 states and 201 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-20 06:49:57,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:49:57,325 INFO L93 Difference]: Finished difference Result 341 states and 448 transitions. [2021-11-20 06:49:57,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:49:57,327 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 122 [2021-11-20 06:49:57,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:49:57,332 INFO L225 Difference]: With dead ends: 341 [2021-11-20 06:49:57,333 INFO L226 Difference]: Without dead ends: 245 [2021-11-20 06:49:57,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:49:57,336 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 278 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:49:57,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 668 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 06:49:57,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-20 06:49:57,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 160. [2021-11-20 06:49:57,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 107 states have (on average 1.2242990654205608) internal successors, (131), 109 states have internal predecessors, (131), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-20 06:49:57,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 200 transitions. [2021-11-20 06:49:57,370 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 200 transitions. Word has length 122 [2021-11-20 06:49:57,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:49:57,371 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 200 transitions. [2021-11-20 06:49:57,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-20 06:49:57,372 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 200 transitions. [2021-11-20 06:49:57,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-20 06:49:57,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:49:57,377 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:49:57,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:49:57,378 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:49:57,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:49:57,379 INFO L85 PathProgramCache]: Analyzing trace with hash -2103837312, now seen corresponding path program 1 times [2021-11-20 06:49:57,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:49:57,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585357956] [2021-11-20 06:49:57,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:57,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:49:57,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:57,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:49:57,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:57,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:49:57,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:57,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:49:57,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:57,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:49:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:57,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:49:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:57,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:49:57,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:57,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:49:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:57,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:49:57,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:57,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:49:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:57,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 06:49:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:57,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:49:57,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:57,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 06:49:57,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:57,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-20 06:49:57,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:57,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:49:57,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:57,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:49:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:57,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 06:49:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:58,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:49:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:58,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:49:58,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:58,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-11-20 06:49:58,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:58,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-20 06:49:58,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-20 06:49:58,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:49:58,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585357956] [2021-11-20 06:49:58,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585357956] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:49:58,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:49:58,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 06:49:58,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430762526] [2021-11-20 06:49:58,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:49:58,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:49:58,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:49:58,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:49:58,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:49:58,077 INFO L87 Difference]: Start difference. First operand 160 states and 200 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-20 06:49:59,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:49:59,421 INFO L93 Difference]: Finished difference Result 371 states and 489 transitions. [2021-11-20 06:49:59,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:49:59,423 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 130 [2021-11-20 06:49:59,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:49:59,426 INFO L225 Difference]: With dead ends: 371 [2021-11-20 06:49:59,427 INFO L226 Difference]: Without dead ends: 226 [2021-11-20 06:49:59,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:49:59,429 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 255 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:49:59,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 967 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 06:49:59,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-20 06:49:59,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 162. [2021-11-20 06:49:59,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 108 states have (on average 1.2222222222222223) internal successors, (132), 111 states have internal predecessors, (132), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (36), 34 states have call predecessors, (36), 34 states have call successors, (36) [2021-11-20 06:49:59,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 203 transitions. [2021-11-20 06:49:59,458 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 203 transitions. Word has length 130 [2021-11-20 06:49:59,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:49:59,459 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 203 transitions. [2021-11-20 06:49:59,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-20 06:49:59,459 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 203 transitions. [2021-11-20 06:49:59,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-20 06:49:59,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:49:59,467 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:49:59,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:49:59,468 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:49:59,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:49:59,469 INFO L85 PathProgramCache]: Analyzing trace with hash -209170488, now seen corresponding path program 1 times [2021-11-20 06:49:59,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:49:59,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450960202] [2021-11-20 06:49:59,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:59,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:49:59,571 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:49:59,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201999181] [2021-11-20 06:49:59,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:59,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:49:59,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:49:59,577 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:49:59,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:50:00,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:00,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 2366 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:50:00,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:00,716 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-20 06:50:00,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:00,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:00,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450960202] [2021-11-20 06:50:00,718 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:50:00,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201999181] [2021-11-20 06:50:00,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201999181] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:00,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:50:00,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:50:00,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714951414] [2021-11-20 06:50:00,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:00,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:50:00,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:00,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:50:00,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:50:00,722 INFO L87 Difference]: Start difference. First operand 162 states and 203 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-20 06:50:00,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:00,953 INFO L93 Difference]: Finished difference Result 261 states and 324 transitions. [2021-11-20 06:50:00,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:50:00,954 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 145 [2021-11-20 06:50:00,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:00,958 INFO L225 Difference]: With dead ends: 261 [2021-11-20 06:50:00,958 INFO L226 Difference]: Without dead ends: 162 [2021-11-20 06:50:00,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:50:00,961 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 235 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:00,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 802 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:50:00,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-20 06:50:00,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-11-20 06:50:00,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 108 states have (on average 1.212962962962963) internal successors, (131), 111 states have internal predecessors, (131), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (36), 34 states have call predecessors, (36), 34 states have call successors, (36) [2021-11-20 06:50:00,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 202 transitions. [2021-11-20 06:50:00,996 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 202 transitions. Word has length 145 [2021-11-20 06:50:00,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:00,998 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 202 transitions. [2021-11-20 06:50:00,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-20 06:50:00,999 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 202 transitions. [2021-11-20 06:50:01,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-20 06:50:01,005 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:01,005 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:01,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:01,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:01,226 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:01,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:01,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1337604585, now seen corresponding path program 1 times [2021-11-20 06:50:01,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:01,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389884703] [2021-11-20 06:50:01,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:01,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:01,301 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:50:01,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059261996] [2021-11-20 06:50:01,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:01,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:01,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:01,303 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:01,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:50:01,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:01,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 2438 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:50:01,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-20 06:50:02,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:02,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:02,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389884703] [2021-11-20 06:50:02,308 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:50:02,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059261996] [2021-11-20 06:50:02,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059261996] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:02,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:50:02,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 06:50:02,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607501038] [2021-11-20 06:50:02,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:02,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:50:02,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:02,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:50:02,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:50:02,311 INFO L87 Difference]: Start difference. First operand 162 states and 202 transitions. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2021-11-20 06:50:02,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:02,676 INFO L93 Difference]: Finished difference Result 274 states and 342 transitions. [2021-11-20 06:50:02,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:50:02,677 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 161 [2021-11-20 06:50:02,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:02,680 INFO L225 Difference]: With dead ends: 274 [2021-11-20 06:50:02,680 INFO L226 Difference]: Without dead ends: 162 [2021-11-20 06:50:02,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:50:02,682 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 300 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:02,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 1070 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:50:02,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-20 06:50:02,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-11-20 06:50:02,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 108 states have (on average 1.212962962962963) internal successors, (131), 111 states have internal predecessors, (131), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2021-11-20 06:50:02,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 201 transitions. [2021-11-20 06:50:02,698 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 201 transitions. Word has length 161 [2021-11-20 06:50:02,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:02,699 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 201 transitions. [2021-11-20 06:50:02,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 5 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2021-11-20 06:50:02,700 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 201 transitions. [2021-11-20 06:50:02,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-20 06:50:02,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:02,703 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:02,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:02,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:02,918 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:02,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:02,918 INFO L85 PathProgramCache]: Analyzing trace with hash 996052163, now seen corresponding path program 1 times [2021-11-20 06:50:02,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:02,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617784901] [2021-11-20 06:50:02,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:02,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:02,984 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:50:02,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [310138036] [2021-11-20 06:50:02,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:02,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:02,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:02,986 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:03,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:50:03,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:03,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 2557 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:50:03,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:04,251 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-20 06:50:04,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:04,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:04,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617784901] [2021-11-20 06:50:04,252 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:50:04,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310138036] [2021-11-20 06:50:04,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310138036] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:04,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:50:04,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:50:04,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123878512] [2021-11-20 06:50:04,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:04,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:50:04,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:04,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:50:04,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:50:04,257 INFO L87 Difference]: Start difference. First operand 162 states and 201 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:50:04,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:04,548 INFO L93 Difference]: Finished difference Result 286 states and 356 transitions. [2021-11-20 06:50:04,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:50:04,550 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 176 [2021-11-20 06:50:04,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:04,552 INFO L225 Difference]: With dead ends: 286 [2021-11-20 06:50:04,553 INFO L226 Difference]: Without dead ends: 180 [2021-11-20 06:50:04,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:50:04,554 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 21 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:04,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 897 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:50:04,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-20 06:50:04,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 166. [2021-11-20 06:50:04,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 112 states have (on average 1.2142857142857142) internal successors, (136), 115 states have internal predecessors, (136), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2021-11-20 06:50:04,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 206 transitions. [2021-11-20 06:50:04,572 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 206 transitions. Word has length 176 [2021-11-20 06:50:04,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:04,573 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 206 transitions. [2021-11-20 06:50:04,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:50:04,573 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 206 transitions. [2021-11-20 06:50:04,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-20 06:50:04,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:04,577 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:04,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-20 06:50:04,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 06:50:04,800 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:04,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:04,801 INFO L85 PathProgramCache]: Analyzing trace with hash 28701509, now seen corresponding path program 1 times [2021-11-20 06:50:04,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:04,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701746660] [2021-11-20 06:50:04,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:04,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:04,872 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:50:04,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006943936] [2021-11-20 06:50:04,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:04,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:04,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:04,874 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:04,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:50:05,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:05,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 2554 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:50:05,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:05,856 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-20 06:50:05,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:05,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:05,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701746660] [2021-11-20 06:50:05,857 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:50:05,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006943936] [2021-11-20 06:50:05,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006943936] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:05,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:50:05,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:50:05,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788712106] [2021-11-20 06:50:05,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:05,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:50:05,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:05,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:50:05,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:50:05,861 INFO L87 Difference]: Start difference. First operand 166 states and 206 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:50:05,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:05,904 INFO L93 Difference]: Finished difference Result 274 states and 339 transitions. [2021-11-20 06:50:05,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:50:05,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 176 [2021-11-20 06:50:05,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:05,907 INFO L225 Difference]: With dead ends: 274 [2021-11-20 06:50:05,908 INFO L226 Difference]: Without dead ends: 170 [2021-11-20 06:50:05,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:50:05,910 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 3 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 583 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 [2021-11-20 06:50:05,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 583 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:50:05,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-20 06:50:05,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2021-11-20 06:50:05,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 114 states have (on average 1.2105263157894737) internal successors, (138), 117 states have internal predecessors, (138), 35 states have call successors, (35), 17 states have call predecessors, (35), 18 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2021-11-20 06:50:05,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 208 transitions. [2021-11-20 06:50:05,941 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 208 transitions. Word has length 176 [2021-11-20 06:50:05,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:05,943 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 208 transitions. [2021-11-20 06:50:05,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:50:05,943 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 208 transitions. [2021-11-20 06:50:05,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-20 06:50:05,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:05,948 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:05,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:06,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:06,164 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:06,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:06,165 INFO L85 PathProgramCache]: Analyzing trace with hash -463924665, now seen corresponding path program 1 times [2021-11-20 06:50:06,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:06,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611499779] [2021-11-20 06:50:06,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:06,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:06,255 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:50:06,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169989482] [2021-11-20 06:50:06,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:06,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:06,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:06,258 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:06,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:50:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:06,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 2549 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 06:50:06,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:07,303 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-20 06:50:07,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:50:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-20 06:50:07,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:07,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611499779] [2021-11-20 06:50:07,966 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:50:07,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169989482] [2021-11-20 06:50:07,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169989482] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:50:07,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:50:07,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2021-11-20 06:50:07,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256576613] [2021-11-20 06:50:07,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:07,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:50:07,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:07,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:50:07,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:50:07,970 INFO L87 Difference]: Start difference. First operand 168 states and 208 transitions. Second operand has 6 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-11-20 06:50:08,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:08,028 INFO L93 Difference]: Finished difference Result 178 states and 222 transitions. [2021-11-20 06:50:08,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:50:08,029 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 176 [2021-11-20 06:50:08,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:08,032 INFO L225 Difference]: With dead ends: 178 [2021-11-20 06:50:08,033 INFO L226 Difference]: Without dead ends: 176 [2021-11-20 06:50:08,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:50:08,034 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 6 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:08,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 978 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:50:08,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-20 06:50:08,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2021-11-20 06:50:08,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 118 states have (on average 1.2033898305084745) internal successors, (142), 122 states have internal predecessors, (142), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2021-11-20 06:50:08,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 219 transitions. [2021-11-20 06:50:08,057 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 219 transitions. Word has length 176 [2021-11-20 06:50:08,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:08,059 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 219 transitions. [2021-11-20 06:50:08,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-11-20 06:50:08,060 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 219 transitions. [2021-11-20 06:50:08,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-20 06:50:08,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:08,064 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:08,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:08,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:08,283 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:08,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:08,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1104137534, now seen corresponding path program 1 times [2021-11-20 06:50:08,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:08,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044058146] [2021-11-20 06:50:08,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:08,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:08,375 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:50:08,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [572265976] [2021-11-20 06:50:08,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:08,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:08,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:08,377 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:08,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:50:08,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:08,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 2552 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 06:50:08,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:09,305 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-20 06:50:09,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:09,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:09,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044058146] [2021-11-20 06:50:09,306 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:50:09,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572265976] [2021-11-20 06:50:09,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572265976] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:09,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:50:09,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:50:09,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540917812] [2021-11-20 06:50:09,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:09,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:50:09,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:09,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:50:09,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:50:09,309 INFO L87 Difference]: Start difference. First operand 175 states and 219 transitions. Second operand has 6 states, 5 states have (on average 16.8) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-20 06:50:09,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:09,392 INFO L93 Difference]: Finished difference Result 281 states and 350 transitions. [2021-11-20 06:50:09,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:50:09,393 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.8) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 176 [2021-11-20 06:50:09,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:09,396 INFO L225 Difference]: With dead ends: 281 [2021-11-20 06:50:09,396 INFO L226 Difference]: Without dead ends: 175 [2021-11-20 06:50:09,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:50:09,398 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 13 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 950 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 [2021-11-20 06:50:09,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 950 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:50:09,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-20 06:50:09,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2021-11-20 06:50:09,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 118 states have (on average 1.194915254237288) internal successors, (141), 122 states have internal predecessors, (141), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2021-11-20 06:50:09,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 218 transitions. [2021-11-20 06:50:09,414 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 218 transitions. Word has length 176 [2021-11-20 06:50:09,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:09,415 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 218 transitions. [2021-11-20 06:50:09,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.8) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-20 06:50:09,416 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 218 transitions. [2021-11-20 06:50:09,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-20 06:50:09,419 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:09,420 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:09,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:09,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-20 06:50:09,648 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:09,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:09,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1406424536, now seen corresponding path program 1 times [2021-11-20 06:50:09,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:09,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057992138] [2021-11-20 06:50:09,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:09,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:09,751 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:50:09,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1474790114] [2021-11-20 06:50:09,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:09,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:09,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:09,754 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:09,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:50:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:10,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 2559 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 06:50:10,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:10,755 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-20 06:50:10,755 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:10,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:10,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057992138] [2021-11-20 06:50:10,756 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:50:10,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474790114] [2021-11-20 06:50:10,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474790114] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:10,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:50:10,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:50:10,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979516670] [2021-11-20 06:50:10,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:10,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:50:10,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:10,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:50:10,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:50:10,763 INFO L87 Difference]: Start difference. First operand 175 states and 218 transitions. Second operand has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 7 states have internal predecessors, (85), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-20 06:50:10,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:10,859 INFO L93 Difference]: Finished difference Result 283 states and 351 transitions. [2021-11-20 06:50:10,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:50:10,861 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 7 states have internal predecessors, (85), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 177 [2021-11-20 06:50:10,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:10,864 INFO L225 Difference]: With dead ends: 283 [2021-11-20 06:50:10,864 INFO L226 Difference]: Without dead ends: 177 [2021-11-20 06:50:10,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:50:10,866 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 18 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:10,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 948 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:50:10,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-20 06:50:10,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2021-11-20 06:50:10,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 119 states have (on average 1.1932773109243697) internal successors, (142), 123 states have internal predecessors, (142), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2021-11-20 06:50:10,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 219 transitions. [2021-11-20 06:50:10,890 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 219 transitions. Word has length 177 [2021-11-20 06:50:10,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:10,894 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 219 transitions. [2021-11-20 06:50:10,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 7 states have internal predecessors, (85), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-20 06:50:10,894 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 219 transitions. [2021-11-20 06:50:10,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-20 06:50:10,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:10,898 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:10,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-20 06:50:11,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:11,124 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:11,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:11,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1080671750, now seen corresponding path program 1 times [2021-11-20 06:50:11,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:11,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954304760] [2021-11-20 06:50:11,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:11,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:11,218 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:50:11,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [844591661] [2021-11-20 06:50:11,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:11,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:11,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:11,221 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:11,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:50:11,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:11,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 2566 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 06:50:11,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:12,273 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-20 06:50:12,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:12,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:12,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954304760] [2021-11-20 06:50:12,273 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:50:12,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844591661] [2021-11-20 06:50:12,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844591661] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:12,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:50:12,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:50:12,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262192457] [2021-11-20 06:50:12,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:12,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:50:12,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:12,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:50:12,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:50:12,278 INFO L87 Difference]: Start difference. First operand 176 states and 219 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:50:12,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:12,353 INFO L93 Difference]: Finished difference Result 293 states and 372 transitions. [2021-11-20 06:50:12,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:50:12,354 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 179 [2021-11-20 06:50:12,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:12,356 INFO L225 Difference]: With dead ends: 293 [2021-11-20 06:50:12,357 INFO L226 Difference]: Without dead ends: 181 [2021-11-20 06:50:12,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:50:12,358 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 7 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:12,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 559 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:50:12,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-20 06:50:12,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2021-11-20 06:50:12,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 120 states have (on average 1.1916666666666667) internal successors, (143), 124 states have internal predecessors, (143), 36 states have call successors, (36), 18 states have call predecessors, (36), 20 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2021-11-20 06:50:12,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 220 transitions. [2021-11-20 06:50:12,375 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 220 transitions. Word has length 179 [2021-11-20 06:50:12,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:12,376 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 220 transitions. [2021-11-20 06:50:12,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:50:12,376 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 220 transitions. [2021-11-20 06:50:12,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-20 06:50:12,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:12,380 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:12,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:12,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:12,600 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:12,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:12,601 INFO L85 PathProgramCache]: Analyzing trace with hash 712361510, now seen corresponding path program 1 times [2021-11-20 06:50:12,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:12,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652183045] [2021-11-20 06:50:12,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:12,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:12,687 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:50:12,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046129338] [2021-11-20 06:50:12,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:12,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:12,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:12,689 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:12,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:50:13,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:13,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 2572 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-20 06:50:13,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:13,859 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 11 treesize of output 5 [2021-11-20 06:50:14,069 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-20 06:50:14,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:14,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:14,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652183045] [2021-11-20 06:50:14,070 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:50:14,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046129338] [2021-11-20 06:50:14,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046129338] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:14,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:50:14,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-20 06:50:14,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247093744] [2021-11-20 06:50:14,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:14,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:50:14,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:14,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:50:14,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:50:14,073 INFO L87 Difference]: Start difference. First operand 177 states and 220 transitions. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 6 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-20 06:50:14,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:14,708 INFO L93 Difference]: Finished difference Result 326 states and 410 transitions. [2021-11-20 06:50:14,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:50:14,709 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 6 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 179 [2021-11-20 06:50:14,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:14,712 INFO L225 Difference]: With dead ends: 326 [2021-11-20 06:50:14,712 INFO L226 Difference]: Without dead ends: 205 [2021-11-20 06:50:14,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:50:14,714 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 112 mSDsluCounter, 1480 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:14,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 1659 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:50:14,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-20 06:50:14,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 186. [2021-11-20 06:50:14,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 128 states have (on average 1.1953125) internal successors, (153), 132 states have internal predecessors, (153), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 36 states have call predecessors, (44), 35 states have call successors, (44) [2021-11-20 06:50:14,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 233 transitions. [2021-11-20 06:50:14,768 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 233 transitions. Word has length 179 [2021-11-20 06:50:14,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:14,769 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 233 transitions. [2021-11-20 06:50:14,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 6 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-20 06:50:14,770 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 233 transitions. [2021-11-20 06:50:14,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-20 06:50:14,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:14,773 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:14,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:15,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:15,000 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:15,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:15,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1965868264, now seen corresponding path program 1 times [2021-11-20 06:50:15,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:15,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313790726] [2021-11-20 06:50:15,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:15,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:15,076 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:50:15,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592060511] [2021-11-20 06:50:15,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:15,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:15,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:15,078 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:15,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:50:15,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:15,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 2575 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 06:50:15,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:16,212 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-20 06:50:16,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:16,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:16,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313790726] [2021-11-20 06:50:16,214 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:50:16,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592060511] [2021-11-20 06:50:16,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592060511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:16,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:50:16,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:50:16,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271316362] [2021-11-20 06:50:16,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:16,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:50:16,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:16,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:50:16,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:50:16,219 INFO L87 Difference]: Start difference. First operand 186 states and 233 transitions. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:50:16,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:16,525 INFO L93 Difference]: Finished difference Result 317 states and 400 transitions. [2021-11-20 06:50:16,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:50:16,526 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 179 [2021-11-20 06:50:16,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:16,528 INFO L225 Difference]: With dead ends: 317 [2021-11-20 06:50:16,528 INFO L226 Difference]: Without dead ends: 208 [2021-11-20 06:50:16,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:50:16,529 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 19 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1294 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:16,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 1294 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:50:16,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-20 06:50:16,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 188. [2021-11-20 06:50:16,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 130 states have (on average 1.1923076923076923) internal successors, (155), 133 states have internal predecessors, (155), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 37 states have call predecessors, (44), 35 states have call successors, (44) [2021-11-20 06:50:16,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 235 transitions. [2021-11-20 06:50:16,543 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 235 transitions. Word has length 179 [2021-11-20 06:50:16,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:16,544 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 235 transitions. [2021-11-20 06:50:16,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:50:16,544 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 235 transitions. [2021-11-20 06:50:16,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-20 06:50:16,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:16,546 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:16,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:16,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:16,767 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:16,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:16,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1941254556, now seen corresponding path program 1 times [2021-11-20 06:50:16,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:16,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925477507] [2021-11-20 06:50:16,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:16,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:16,831 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:50:16,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371643276] [2021-11-20 06:50:16,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:16,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:16,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:16,833 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:16,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 06:50:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:17,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 2579 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:50:17,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:18,020 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-20 06:50:18,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:18,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:18,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925477507] [2021-11-20 06:50:18,021 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:50:18,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371643276] [2021-11-20 06:50:18,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371643276] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:18,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:50:18,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:50:18,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353985038] [2021-11-20 06:50:18,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:18,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:50:18,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:18,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:50:18,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:50:18,024 INFO L87 Difference]: Start difference. First operand 188 states and 235 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 6 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:50:18,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:18,339 INFO L93 Difference]: Finished difference Result 232 states and 289 transitions. [2021-11-20 06:50:18,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:50:18,340 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 6 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 182 [2021-11-20 06:50:18,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:18,343 INFO L225 Difference]: With dead ends: 232 [2021-11-20 06:50:18,343 INFO L226 Difference]: Without dead ends: 205 [2021-11-20 06:50:18,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:50:18,344 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 15 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:18,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 1082 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:50:18,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-20 06:50:18,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 189. [2021-11-20 06:50:18,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 131 states have (on average 1.1908396946564885) internal successors, (156), 133 states have internal predecessors, (156), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 38 states have call predecessors, (44), 35 states have call successors, (44) [2021-11-20 06:50:18,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 236 transitions. [2021-11-20 06:50:18,360 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 236 transitions. Word has length 182 [2021-11-20 06:50:18,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:18,361 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 236 transitions. [2021-11-20 06:50:18,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 6 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:50:18,362 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 236 transitions. [2021-11-20 06:50:18,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-20 06:50:18,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:18,364 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:18,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:18,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 06:50:18,588 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:18,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:18,589 INFO L85 PathProgramCache]: Analyzing trace with hash -101731212, now seen corresponding path program 2 times [2021-11-20 06:50:18,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:18,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751021066] [2021-11-20 06:50:18,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:18,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:18,652 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:50:18,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [21309199] [2021-11-20 06:50:18,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:50:18,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:18,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:18,654 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:18,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 06:50:19,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:50:19,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:50:19,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 2583 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 06:50:19,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:19,869 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-20 06:50:19,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:19,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:19,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751021066] [2021-11-20 06:50:19,870 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:50:19,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21309199] [2021-11-20 06:50:19,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21309199] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:19,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:50:19,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:50:19,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978324114] [2021-11-20 06:50:19,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:19,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:50:19,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:19,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:50:19,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:50:19,875 INFO L87 Difference]: Start difference. First operand 189 states and 236 transitions. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:50:20,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:20,161 INFO L93 Difference]: Finished difference Result 324 states and 402 transitions. [2021-11-20 06:50:20,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:50:20,162 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 185 [2021-11-20 06:50:20,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:20,164 INFO L225 Difference]: With dead ends: 324 [2021-11-20 06:50:20,164 INFO L226 Difference]: Without dead ends: 205 [2021-11-20 06:50:20,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:50:20,169 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 12 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:20,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 931 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:50:20,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-20 06:50:20,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 199. [2021-11-20 06:50:20,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 141 states have (on average 1.1914893617021276) internal successors, (168), 143 states have internal predecessors, (168), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 38 states have call predecessors, (44), 35 states have call successors, (44) [2021-11-20 06:50:20,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 248 transitions. [2021-11-20 06:50:20,185 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 248 transitions. Word has length 185 [2021-11-20 06:50:20,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:20,187 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 248 transitions. [2021-11-20 06:50:20,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:50:20,188 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 248 transitions. [2021-11-20 06:50:20,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-20 06:50:20,190 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:20,190 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:20,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:20,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 06:50:20,404 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:20,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:20,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1980862158, now seen corresponding path program 1 times [2021-11-20 06:50:20,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:20,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302240308] [2021-11-20 06:50:20,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:20,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:20,476 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:50:20,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818283935] [2021-11-20 06:50:20,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:20,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:20,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:20,478 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:20,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 06:50:21,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:21,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 2580 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 06:50:21,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:21,555 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-20 06:50:21,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:21,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:21,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302240308] [2021-11-20 06:50:21,556 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:50:21,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818283935] [2021-11-20 06:50:21,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818283935] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:21,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:50:21,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:50:21,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409349895] [2021-11-20 06:50:21,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:21,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:50:21,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:21,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:50:21,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:50:21,559 INFO L87 Difference]: Start difference. First operand 199 states and 248 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 6 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:50:21,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:21,636 INFO L93 Difference]: Finished difference Result 328 states and 406 transitions. [2021-11-20 06:50:21,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:50:21,637 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 6 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 185 [2021-11-20 06:50:21,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:21,639 INFO L225 Difference]: With dead ends: 328 [2021-11-20 06:50:21,640 INFO L226 Difference]: Without dead ends: 209 [2021-11-20 06:50:21,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:50:21,641 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 15 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:21,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 1147 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:50:21,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-20 06:50:21,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 193. [2021-11-20 06:50:21,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 135 states have (on average 1.1851851851851851) internal successors, (160), 137 states have internal predecessors, (160), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 38 states have call predecessors, (44), 35 states have call successors, (44) [2021-11-20 06:50:21,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 240 transitions. [2021-11-20 06:50:21,659 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 240 transitions. Word has length 185 [2021-11-20 06:50:21,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:21,660 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 240 transitions. [2021-11-20 06:50:21,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 6 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:50:21,660 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 240 transitions. [2021-11-20 06:50:21,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-20 06:50:21,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:21,663 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:21,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:21,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 06:50:21,877 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:21,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:21,878 INFO L85 PathProgramCache]: Analyzing trace with hash 382427316, now seen corresponding path program 1 times [2021-11-20 06:50:21,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:21,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966513485] [2021-11-20 06:50:21,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:21,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:21,940 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:50:21,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2066346492] [2021-11-20 06:50:21,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:21,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:21,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:21,949 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:21,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 06:50:22,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:22,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 2575 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:50:22,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:22,737 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-20 06:50:22,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:22,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:22,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966513485] [2021-11-20 06:50:22,738 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:50:22,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066346492] [2021-11-20 06:50:22,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066346492] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:22,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:50:22,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:50:22,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416974700] [2021-11-20 06:50:22,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:22,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:50:22,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:22,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:50:22,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:50:22,741 INFO L87 Difference]: Start difference. First operand 193 states and 240 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:50:22,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:22,774 INFO L93 Difference]: Finished difference Result 339 states and 427 transitions. [2021-11-20 06:50:22,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:50:22,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 185 [2021-11-20 06:50:22,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:22,778 INFO L225 Difference]: With dead ends: 339 [2021-11-20 06:50:22,778 INFO L226 Difference]: Without dead ends: 193 [2021-11-20 06:50:22,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:50:22,780 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 7 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:22,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 586 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:50:22,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-20 06:50:22,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2021-11-20 06:50:22,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 135 states have (on average 1.1777777777777778) internal successors, (159), 137 states have internal predecessors, (159), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (44), 38 states have call predecessors, (44), 35 states have call successors, (44) [2021-11-20 06:50:22,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 239 transitions. [2021-11-20 06:50:22,797 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 239 transitions. Word has length 185 [2021-11-20 06:50:22,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:22,798 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 239 transitions. [2021-11-20 06:50:22,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:50:22,799 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 239 transitions. [2021-11-20 06:50:22,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-20 06:50:22,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:22,801 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:22,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:23,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 06:50:23,016 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:23,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:23,017 INFO L85 PathProgramCache]: Analyzing trace with hash -908019048, now seen corresponding path program 1 times [2021-11-20 06:50:23,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:23,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343243155] [2021-11-20 06:50:23,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:23,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:23,076 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:50:23,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [649814518] [2021-11-20 06:50:23,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:23,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:23,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:23,077 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:23,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 06:50:23,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:23,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 2585 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-20 06:50:23,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:23,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:50:24,268 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 06:50:24,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-11-20 06:50:26,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:26,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-20 06:50:43,625 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~b#1| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~a#1| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| (* |aws_mul_size_checked_aws_mul_u64_checked_~b#1| |aws_mul_size_checked_aws_mul_u64_checked_~a#1|))))) is different from true [2021-11-20 06:50:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 52 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 3 not checked. [2021-11-20 06:50:49,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:50:50,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:50,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343243155] [2021-11-20 06:50:50,846 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:50:50,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649814518] [2021-11-20 06:50:50,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649814518] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:50:50,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:50:50,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-11-20 06:50:50,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327078154] [2021-11-20 06:50:50,847 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:50:50,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 06:50:50,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:50,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 06:50:50,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=871, Unknown=11, NotChecked=60, Total=1056 [2021-11-20 06:50:50,849 INFO L87 Difference]: Start difference. First operand 193 states and 239 transitions. Second operand has 32 states, 28 states have (on average 4.214285714285714) internal successors, (118), 28 states have internal predecessors, (118), 12 states have call successors, (26), 7 states have call predecessors, (26), 12 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2021-11-20 06:50:57,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:57,230 INFO L93 Difference]: Finished difference Result 400 states and 502 transitions. [2021-11-20 06:50:57,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 06:50:57,231 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 4.214285714285714) internal successors, (118), 28 states have internal predecessors, (118), 12 states have call successors, (26), 7 states have call predecessors, (26), 12 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) Word has length 187 [2021-11-20 06:50:57,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:57,233 INFO L225 Difference]: With dead ends: 400 [2021-11-20 06:50:57,233 INFO L226 Difference]: Without dead ends: 279 [2021-11-20 06:50:57,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 223 SyntacticMatches, 8 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=135, Invalid=1117, Unknown=12, NotChecked=68, Total=1332 [2021-11-20 06:50:57,236 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 109 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 1956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1510 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:57,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 1403 Invalid, 1956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 396 Invalid, 0 Unknown, 1510 Unchecked, 0.7s Time] [2021-11-20 06:50:57,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-11-20 06:50:57,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 247. [2021-11-20 06:50:57,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 176 states have (on average 1.1761363636363635) internal successors, (207), 178 states have internal predecessors, (207), 42 states have call successors, (42), 25 states have call predecessors, (42), 28 states have return successors, (60), 44 states have call predecessors, (60), 41 states have call successors, (60) [2021-11-20 06:50:57,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 309 transitions. [2021-11-20 06:50:57,260 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 309 transitions. Word has length 187 [2021-11-20 06:50:57,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:57,261 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 309 transitions. [2021-11-20 06:50:57,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 4.214285714285714) internal successors, (118), 28 states have internal predecessors, (118), 12 states have call successors, (26), 7 states have call predecessors, (26), 12 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2021-11-20 06:50:57,262 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 309 transitions. [2021-11-20 06:50:57,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-20 06:50:57,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:57,264 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:57,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:57,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 06:50:57,480 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:57,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:57,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1509885018, now seen corresponding path program 1 times [2021-11-20 06:50:57,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:57,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71728555] [2021-11-20 06:50:57,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:57,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:57,553 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:50:57,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1405764055] [2021-11-20 06:50:57,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:57,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:57,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:57,555 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:57,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 06:50:58,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:58,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 2580 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:50:58,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:58,441 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-20 06:50:58,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:58,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:58,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71728555] [2021-11-20 06:50:58,441 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:50:58,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405764055] [2021-11-20 06:50:58,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405764055] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:58,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:50:58,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:50:58,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830477542] [2021-11-20 06:50:58,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:58,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:50:58,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:58,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:50:58,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:50:58,445 INFO L87 Difference]: Start difference. First operand 247 states and 309 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:50:58,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:58,676 INFO L93 Difference]: Finished difference Result 395 states and 500 transitions. [2021-11-20 06:50:58,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:50:58,679 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 187 [2021-11-20 06:50:58,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:58,682 INFO L225 Difference]: With dead ends: 395 [2021-11-20 06:50:58,682 INFO L226 Difference]: Without dead ends: 247 [2021-11-20 06:50:58,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:50:58,684 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 7 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:58,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 744 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:50:58,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-11-20 06:50:58,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2021-11-20 06:50:58,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 176 states have (on average 1.1647727272727273) internal successors, (205), 178 states have internal predecessors, (205), 42 states have call successors, (42), 25 states have call predecessors, (42), 28 states have return successors, (60), 44 states have call predecessors, (60), 41 states have call successors, (60) [2021-11-20 06:50:58,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 307 transitions. [2021-11-20 06:50:58,706 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 307 transitions. Word has length 187 [2021-11-20 06:50:58,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:58,707 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 307 transitions. [2021-11-20 06:50:58,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:50:58,707 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 307 transitions. [2021-11-20 06:50:58,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-20 06:50:58,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:58,711 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:58,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-20 06:50:58,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:58,924 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:58,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:58,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1925449391, now seen corresponding path program 1 times [2021-11-20 06:50:58,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:58,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798745556] [2021-11-20 06:50:58,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:58,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:58,987 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:50:58,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [198937585] [2021-11-20 06:50:58,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:58,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:58,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:58,989 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:59,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 06:50:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:59,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 2601 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-20 06:50:59,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:59,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:51:00,281 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 06:51:00,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-11-20 06:51:02,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:51:02,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-20 06:51:06,371 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~b#1| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~a#1| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| (* |aws_mul_size_checked_aws_mul_u64_checked_~b#1| |aws_mul_size_checked_aws_mul_u64_checked_~a#1|))))) is different from true [2021-11-20 06:51:19,507 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 55 treesize of output 47 [2021-11-20 06:51:19,673 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 51 proven. 20 refuted. 0 times theorem prover too weak. 45 trivial. 3 not checked. [2021-11-20 06:51:19,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:51:20,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:20,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798745556] [2021-11-20 06:51:20,462 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:51:20,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198937585] [2021-11-20 06:51:20,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198937585] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:51:20,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:51:20,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-20 06:51:20,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208580477] [2021-11-20 06:51:20,463 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:51:20,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 06:51:20,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:20,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 06:51:20,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=471, Unknown=9, NotChecked=44, Total=600 [2021-11-20 06:51:20,465 INFO L87 Difference]: Start difference. First operand 247 states and 307 transitions. Second operand has 24 states, 22 states have (on average 5.454545454545454) internal successors, (120), 22 states have internal predecessors, (120), 11 states have call successors, (27), 7 states have call predecessors, (27), 10 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2021-11-20 06:51:41,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:41,890 INFO L93 Difference]: Finished difference Result 469 states and 600 transitions. [2021-11-20 06:51:41,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 06:51:41,890 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 5.454545454545454) internal successors, (120), 22 states have internal predecessors, (120), 11 states have call successors, (27), 7 states have call predecessors, (27), 10 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) Word has length 193 [2021-11-20 06:51:41,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:41,894 INFO L225 Difference]: With dead ends: 469 [2021-11-20 06:51:41,894 INFO L226 Difference]: Without dead ends: 352 [2021-11-20 06:51:41,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 235 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 39.0s TimeCoverageRelationStatistics Valid=117, Invalid=796, Unknown=21, NotChecked=58, Total=992 [2021-11-20 06:51:41,897 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 202 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 2095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1204 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:41,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 1159 Invalid, 2095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 773 Invalid, 0 Unknown, 1204 Unchecked, 1.0s Time] [2021-11-20 06:51:41,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-20 06:51:41,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 296. [2021-11-20 06:51:41,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 217 states have (on average 1.1705069124423964) internal successors, (254), 220 states have internal predecessors, (254), 45 states have call successors, (45), 27 states have call predecessors, (45), 33 states have return successors, (75), 49 states have call predecessors, (75), 44 states have call successors, (75) [2021-11-20 06:51:41,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 374 transitions. [2021-11-20 06:51:41,926 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 374 transitions. Word has length 193 [2021-11-20 06:51:41,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:41,926 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 374 transitions. [2021-11-20 06:51:41,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 5.454545454545454) internal successors, (120), 22 states have internal predecessors, (120), 11 states have call successors, (27), 7 states have call predecessors, (27), 10 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2021-11-20 06:51:41,927 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 374 transitions. [2021-11-20 06:51:41,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-20 06:51:41,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:41,931 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:51:41,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 06:51:42,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:42,140 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:51:42,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:42,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1356605323, now seen corresponding path program 1 times [2021-11-20 06:51:42,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:42,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753358350] [2021-11-20 06:51:42,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:42,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:42,232 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:51:42,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869471853] [2021-11-20 06:51:42,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:42,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:42,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:51:42,236 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:51:42,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 06:51:42,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:42,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 2611 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:51:42,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:43,345 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-20 06:51:43,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:51:43,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:43,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753358350] [2021-11-20 06:51:43,345 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:51:43,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869471853] [2021-11-20 06:51:43,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869471853] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:51:43,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:51:43,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:51:43,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485111781] [2021-11-20 06:51:43,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:51:43,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:51:43,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:43,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:51:43,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:51:43,348 INFO L87 Difference]: Start difference. First operand 296 states and 374 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-20 06:51:43,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:43,596 INFO L93 Difference]: Finished difference Result 462 states and 587 transitions. [2021-11-20 06:51:43,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:51:43,598 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 195 [2021-11-20 06:51:43,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:43,601 INFO L225 Difference]: With dead ends: 462 [2021-11-20 06:51:43,601 INFO L226 Difference]: Without dead ends: 297 [2021-11-20 06:51:43,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:51:43,603 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 13 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:43,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 726 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:51:43,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-11-20 06:51:43,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 296. [2021-11-20 06:51:43,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 217 states have (on average 1.1658986175115207) internal successors, (253), 220 states have internal predecessors, (253), 45 states have call successors, (45), 27 states have call predecessors, (45), 33 states have return successors, (75), 49 states have call predecessors, (75), 44 states have call successors, (75) [2021-11-20 06:51:43,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 373 transitions. [2021-11-20 06:51:43,627 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 373 transitions. Word has length 195 [2021-11-20 06:51:43,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:43,628 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 373 transitions. [2021-11-20 06:51:43,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-20 06:51:43,628 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 373 transitions. [2021-11-20 06:51:43,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-20 06:51:43,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:43,631 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:51:43,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 06:51:43,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-20 06:51:43,852 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:51:43,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:43,853 INFO L85 PathProgramCache]: Analyzing trace with hash -726706377, now seen corresponding path program 1 times [2021-11-20 06:51:43,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:43,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499564363] [2021-11-20 06:51:43,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:43,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:43,936 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:51:43,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [754261913] [2021-11-20 06:51:43,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:43,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:43,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:51:43,938 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:51:43,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 06:51:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:44,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 2613 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-20 06:51:44,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:47,236 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| (select (select |c_#memory_$Pointer$.offset| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset|)))) (= (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| (select (select |c_#memory_$Pointer$.base| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset|))) |c_#memory_$Pointer$.base|))) is different from true [2021-11-20 06:51:49,442 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (and (= (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 (select (select |c_#memory_$Pointer$.base| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0))) |c_#memory_$Pointer$.base|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 (select (select |c_#memory_$Pointer$.offset| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0)))))) is different from true [2021-11-20 06:51:49,617 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-20 06:51:49,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 50 [2021-11-20 06:51:49,676 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-20 06:51:49,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 48 [2021-11-20 06:51:51,624 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 35 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 9 not checked. [2021-11-20 06:51:51,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:51:54,273 INFO L354 Elim1Store]: treesize reduction 35, result has 23.9 percent of original size [2021-11-20 06:51:54,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 60 [2021-11-20 06:51:54,286 INFO L354 Elim1Store]: treesize reduction 37, result has 2.6 percent of original size [2021-11-20 06:51:54,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 34 [2021-11-20 06:51:54,293 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 27 treesize of output 21 [2021-11-20 06:51:54,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-11-20 06:52:05,523 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_aws_priority_queue_is_valid_#in~queue#1.offset_BEFORE_CALL_9| Int) (|v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_67| Int) (v_DerPreprocessor_4 Int) (|v_aws_priority_queue_is_valid_#in~queue#1.base_BEFORE_CALL_12| Int) (v_DerPreprocessor_3 Int)) (let ((.cse0 (+ 40 |v_aws_priority_queue_is_valid_#in~queue#1.offset_BEFORE_CALL_9|))) (or (and (= (select (select |c_old(#memory_$Pointer$.base)| |v_aws_priority_queue_is_valid_#in~queue#1.base_BEFORE_CALL_12|) .cse0) 0) (= (select (select |c_old(#memory_$Pointer$.offset)| |v_aws_priority_queue_is_valid_#in~queue#1.base_BEFORE_CALL_12|) .cse0) 0)) (not (= (select (select (store |c_#memory_$Pointer$.offset| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_67| (store (select |c_#memory_$Pointer$.offset| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_67|) |c_aws_array_list_is_valid_~#required_size~0.offset| v_DerPreprocessor_4)) |v_aws_priority_queue_is_valid_#in~queue#1.base_BEFORE_CALL_12|) .cse0) 0)) (not (= (select (select (store |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_67| (store (select |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_67|) |c_aws_array_list_is_valid_~#required_size~0.offset| v_DerPreprocessor_3)) |v_aws_priority_queue_is_valid_#in~queue#1.base_BEFORE_CALL_12|) .cse0) 0)) (= .cse0 0)))) is different from false [2021-11-20 06:52:05,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:52:05,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499564363] [2021-11-20 06:52:05,527 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:52:05,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754261913] [2021-11-20 06:52:05,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754261913] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:52:05,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:52:05,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-20 06:52:05,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090572724] [2021-11-20 06:52:05,528 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:52:05,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 06:52:05,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:52:05,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 06:52:05,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=723, Unknown=4, NotChecked=168, Total=992 [2021-11-20 06:52:05,529 INFO L87 Difference]: Start difference. First operand 296 states and 373 transitions. Second operand has 24 states, 20 states have (on average 6.0) internal successors, (120), 23 states have internal predecessors, (120), 14 states have call successors, (27), 4 states have call predecessors, (27), 8 states have return successors, (26), 12 states have call predecessors, (26), 14 states have call successors, (26) [2021-11-20 06:52:19,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:52:19,142 INFO L93 Difference]: Finished difference Result 478 states and 606 transitions. [2021-11-20 06:52:19,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-20 06:52:19,143 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 6.0) internal successors, (120), 23 states have internal predecessors, (120), 14 states have call successors, (27), 4 states have call predecessors, (27), 8 states have return successors, (26), 12 states have call predecessors, (26), 14 states have call successors, (26) Word has length 195 [2021-11-20 06:52:19,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:52:19,150 INFO L225 Difference]: With dead ends: 478 [2021-11-20 06:52:19,151 INFO L226 Difference]: Without dead ends: 349 [2021-11-20 06:52:19,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 261 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=188, Invalid=1624, Unknown=6, NotChecked=252, Total=2070 [2021-11-20 06:52:19,154 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 123 mSDsluCounter, 1982 mSDsCounter, 0 mSdLazyCounter, 2088 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 2179 SdHoareTripleChecker+Invalid, 3014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 872 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:52:19,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 2179 Invalid, 3014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2088 Invalid, 0 Unknown, 872 Unchecked, 5.6s Time] [2021-11-20 06:52:19,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-11-20 06:52:19,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 345. [2021-11-20 06:52:19,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 256 states have (on average 1.16796875) internal successors, (299), 260 states have internal predecessors, (299), 51 states have call successors, (51), 28 states have call predecessors, (51), 37 states have return successors, (96), 57 states have call predecessors, (96), 50 states have call successors, (96) [2021-11-20 06:52:19,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 446 transitions. [2021-11-20 06:52:19,186 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 446 transitions. Word has length 195 [2021-11-20 06:52:19,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:52:19,187 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 446 transitions. [2021-11-20 06:52:19,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 6.0) internal successors, (120), 23 states have internal predecessors, (120), 14 states have call successors, (27), 4 states have call predecessors, (27), 8 states have return successors, (26), 12 states have call predecessors, (26), 14 states have call successors, (26) [2021-11-20 06:52:19,188 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 446 transitions. [2021-11-20 06:52:19,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-20 06:52:19,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:52:19,192 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:52:19,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 06:52:19,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:52:19,408 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:52:19,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:52:19,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1664302581, now seen corresponding path program 1 times [2021-11-20 06:52:19,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:52:19,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107560029] [2021-11-20 06:52:19,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:52:19,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:52:19,456 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:52:19,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [539299396] [2021-11-20 06:52:19,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:52:19,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:52:19,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:52:19,457 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:52:19,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 06:52:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:20,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 2601 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-20 06:52:20,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:52:20,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:52:21,341 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 06:52:21,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-11-20 06:52:23,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:52:23,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-20 06:52:28,093 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~b#1| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~a#1| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| (* |aws_mul_size_checked_aws_mul_u64_checked_~b#1| |aws_mul_size_checked_aws_mul_u64_checked_~a#1|))))) is different from true [2021-11-20 06:52:38,580 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 51 proven. 22 refuted. 0 times theorem prover too weak. 45 trivial. 3 not checked. [2021-11-20 06:52:38,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:52:40,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:52:40,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107560029] [2021-11-20 06:52:40,096 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:52:40,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539299396] [2021-11-20 06:52:40,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539299396] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:52:40,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:52:40,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-20 06:52:40,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190246671] [2021-11-20 06:52:40,098 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:52:40,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 06:52:40,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:52:40,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 06:52:40,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=518, Unknown=7, NotChecked=46, Total=650 [2021-11-20 06:52:40,100 INFO L87 Difference]: Start difference. First operand 345 states and 446 transitions. Second operand has 25 states, 23 states have (on average 5.304347826086956) internal successors, (122), 23 states have internal predecessors, (122), 12 states have call successors, (27), 7 states have call predecessors, (27), 11 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2021-11-20 06:53:22,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:22,137 INFO L93 Difference]: Finished difference Result 635 states and 823 transitions. [2021-11-20 06:53:22,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-20 06:53:22,138 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 5.304347826086956) internal successors, (122), 23 states have internal predecessors, (122), 12 states have call successors, (27), 7 states have call predecessors, (27), 11 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) Word has length 195 [2021-11-20 06:53:22,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:22,143 INFO L225 Difference]: With dead ends: 635 [2021-11-20 06:53:22,143 INFO L226 Difference]: Without dead ends: 490 [2021-11-20 06:53:22,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 235 SyntacticMatches, 8 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 53.5s TimeCoverageRelationStatistics Valid=177, Invalid=1363, Unknown=24, NotChecked=76, Total=1640 [2021-11-20 06:53:22,146 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 289 mSDsluCounter, 1131 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 2409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 897 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:22,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 1344 Invalid, 2409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1324 Invalid, 0 Unknown, 897 Unchecked, 4.3s Time] [2021-11-20 06:53:22,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-11-20 06:53:22,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 421. [2021-11-20 06:53:22,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 316 states have (on average 1.1582278481012658) internal successors, (366), 326 states have internal predecessors, (366), 57 states have call successors, (57), 31 states have call predecessors, (57), 47 states have return successors, (127), 64 states have call predecessors, (127), 56 states have call successors, (127) [2021-11-20 06:53:22,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 550 transitions. [2021-11-20 06:53:22,181 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 550 transitions. Word has length 195 [2021-11-20 06:53:22,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:22,181 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 550 transitions. [2021-11-20 06:53:22,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 5.304347826086956) internal successors, (122), 23 states have internal predecessors, (122), 12 states have call successors, (27), 7 states have call predecessors, (27), 11 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2021-11-20 06:53:22,182 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 550 transitions. [2021-11-20 06:53:22,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-20 06:53:22,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:22,185 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:22,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 06:53:22,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-20 06:53:22,408 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:22,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:22,409 INFO L85 PathProgramCache]: Analyzing trace with hash 650197943, now seen corresponding path program 1 times [2021-11-20 06:53:22,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:22,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160618599] [2021-11-20 06:53:22,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:22,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:22,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:22,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:53:22,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:22,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:53:22,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:22,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:53:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:22,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:53:22,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:22,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:53:22,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:22,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:53:22,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:22,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:53:22,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:22,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:53:22,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:22,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:53:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:22,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 06:53:22,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:22,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160618599] [2021-11-20 06:53:22,791 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-20 06:53:22,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638893693] [2021-11-20 06:53:22,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:22,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:22,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:53:22,804 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:53:22,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 06:53:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:23,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 2598 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:53:23,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:53:24,036 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-20 06:53:24,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:53:24,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638893693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:24,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:53:24,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:53:24,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611941369] [2021-11-20 06:53:24,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:24,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:53:24,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:24,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:53:24,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:53:24,038 INFO L87 Difference]: Start difference. First operand 421 states and 550 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-20 06:53:24,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:24,107 INFO L93 Difference]: Finished difference Result 808 states and 1057 transitions. [2021-11-20 06:53:24,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:53:24,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 195 [2021-11-20 06:53:24,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:24,112 INFO L225 Difference]: With dead ends: 808 [2021-11-20 06:53:24,112 INFO L226 Difference]: Without dead ends: 405 [2021-11-20 06:53:24,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:53:24,116 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 0 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:24,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 391 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:53:24,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-11-20 06:53:24,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 391. [2021-11-20 06:53:24,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 293 states have (on average 1.1569965870307166) internal successors, (339), 302 states have internal predecessors, (339), 54 states have call successors, (54), 29 states have call predecessors, (54), 43 states have return successors, (118), 60 states have call predecessors, (118), 53 states have call successors, (118) [2021-11-20 06:53:24,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 511 transitions. [2021-11-20 06:53:24,151 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 511 transitions. Word has length 195 [2021-11-20 06:53:24,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:24,151 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 511 transitions. [2021-11-20 06:53:24,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-20 06:53:24,152 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 511 transitions. [2021-11-20 06:53:24,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-20 06:53:24,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:24,157 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:24,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 06:53:24,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-20 06:53:24,364 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:24,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:24,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1416946166, now seen corresponding path program 1 times [2021-11-20 06:53:24,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:24,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779710357] [2021-11-20 06:53:24,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:24,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:24,430 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:53:24,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170865170] [2021-11-20 06:53:24,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:24,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:53:24,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:53:24,436 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:53:24,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 06:53:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:24,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 2624 conjuncts, 109 conjunts are in the unsatisfiable core [2021-11-20 06:53:24,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:53:25,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:53:25,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-11-20 06:53:25,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-11-20 06:53:26,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:53:26,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-11-20 06:53:26,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-20 06:53:27,078 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 06:53:27,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-11-20 06:53:27,290 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:53:27,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 19 [2021-11-20 06:53:29,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:53:29,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-20 06:53:32,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 06:53:35,976 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~b#1| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~a#1| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| (* |aws_mul_size_checked_aws_mul_u64_checked_~b#1| |aws_mul_size_checked_aws_mul_u64_checked_~a#1|))))) is different from true [2021-11-20 06:53:51,847 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 87 treesize of output 79 [2021-11-20 06:53:51,880 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-20 06:53:51,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 1 [2021-11-20 06:53:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 43 proven. 24 refuted. 0 times theorem prover too weak. 42 trivial. 3 not checked. [2021-11-20 06:53:52,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:53:56,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:56,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779710357] [2021-11-20 06:53:56,227 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:53:56,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170865170] [2021-11-20 06:53:56,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170865170] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:53:56,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:53:56,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-11-20 06:53:56,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208600774] [2021-11-20 06:53:56,229 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:53:56,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-20 06:53:56,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:56,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-20 06:53:56,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1056, Unknown=5, NotChecked=66, Total=1260 [2021-11-20 06:53:56,231 INFO L87 Difference]: Start difference. First operand 391 states and 511 transitions. Second operand has 35 states, 32 states have (on average 3.9375) internal successors, (126), 31 states have internal predecessors, (126), 15 states have call successors, (28), 10 states have call predecessors, (28), 15 states have return successors, (27), 13 states have call predecessors, (27), 15 states have call successors, (27) [2021-11-20 06:54:01,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:01,647 INFO L93 Difference]: Finished difference Result 603 states and 781 transitions. [2021-11-20 06:54:01,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-20 06:54:01,648 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 3.9375) internal successors, (126), 31 states have internal predecessors, (126), 15 states have call successors, (28), 10 states have call predecessors, (28), 15 states have return successors, (27), 13 states have call predecessors, (27), 15 states have call successors, (27) Word has length 199 [2021-11-20 06:54:01,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:01,653 INFO L225 Difference]: With dead ends: 603 [2021-11-20 06:54:01,653 INFO L226 Difference]: Without dead ends: 453 [2021-11-20 06:54:01,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 232 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=182, Invalid=1538, Unknown=6, NotChecked=80, Total=1806 [2021-11-20 06:54:01,656 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 216 mSDsluCounter, 1701 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 1899 SdHoareTripleChecker+Invalid, 2958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2065 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:01,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 1899 Invalid, 2958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 745 Invalid, 0 Unknown, 2065 Unchecked, 2.3s Time] [2021-11-20 06:54:01,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-11-20 06:54:01,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 430. [2021-11-20 06:54:01,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 322 states have (on average 1.15527950310559) internal successors, (372), 332 states have internal predecessors, (372), 59 states have call successors, (59), 32 states have call predecessors, (59), 48 states have return successors, (135), 66 states have call predecessors, (135), 58 states have call successors, (135) [2021-11-20 06:54:01,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 566 transitions. [2021-11-20 06:54:01,697 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 566 transitions. Word has length 199 [2021-11-20 06:54:01,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:01,698 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 566 transitions. [2021-11-20 06:54:01,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 3.9375) internal successors, (126), 31 states have internal predecessors, (126), 15 states have call successors, (28), 10 states have call predecessors, (28), 15 states have return successors, (27), 13 states have call predecessors, (27), 15 states have call successors, (27) [2021-11-20 06:54:01,698 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 566 transitions. [2021-11-20 06:54:01,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-20 06:54:01,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:01,702 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:01,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 06:54:01,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:01,928 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:01,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:01,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1257131461, now seen corresponding path program 1 times [2021-11-20 06:54:01,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:01,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339847717] [2021-11-20 06:54:01,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:01,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:02,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:02,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:54:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:02,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:54:02,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:02,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:54:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:02,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:54:02,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:02,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:54:02,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:02,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:54:02,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:02,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:54:02,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:02,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:54:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:02,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:54:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:02,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:54:02,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:02,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-20 06:54:02,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:02,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:54:02,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:02,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:54:02,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:02,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:54:02,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:02,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:54:02,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:02,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 06:54:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:02,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:54:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:02,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:54:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:02,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:54:02,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:02,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-11-20 06:54:02,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:02,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-20 06:54:02,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:02,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:54:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:03,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:54:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:03,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-20 06:54:03,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:03,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:54:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:03,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:54:03,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:03,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2021-11-20 06:54:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:03,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2021-11-20 06:54:03,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:03,419 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-20 06:54:03,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:03,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339847717] [2021-11-20 06:54:03,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339847717] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:54:03,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042136569] [2021-11-20 06:54:03,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:03,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:03,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:03,424 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:54:03,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 06:54:04,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:04,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 2637 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 06:54:04,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:54:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-20 06:54:05,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:54:05,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042136569] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:05,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:54:05,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10] total 19 [2021-11-20 06:54:05,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184338610] [2021-11-20 06:54:05,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:05,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:54:05,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:05,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:54:05,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:54:05,519 INFO L87 Difference]: Start difference. First operand 430 states and 566 transitions. Second operand has 11 states, 11 states have (on average 10.0) internal successors, (110), 8 states have internal predecessors, (110), 2 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 5 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-20 06:54:06,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:06,059 INFO L93 Difference]: Finished difference Result 615 states and 791 transitions. [2021-11-20 06:54:06,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:54:06,060 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.0) internal successors, (110), 8 states have internal predecessors, (110), 2 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 5 states have call predecessors, (25), 2 states have call successors, (25) Word has length 205 [2021-11-20 06:54:06,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:06,065 INFO L225 Difference]: With dead ends: 615 [2021-11-20 06:54:06,065 INFO L226 Difference]: Without dead ends: 429 [2021-11-20 06:54:06,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:54:06,067 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 13 mSDsluCounter, 1892 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2107 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:06,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2107 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:54:06,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-11-20 06:54:06,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 418. [2021-11-20 06:54:06,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 311 states have (on average 1.1511254019292605) internal successors, (358), 320 states have internal predecessors, (358), 59 states have call successors, (59), 32 states have call predecessors, (59), 47 states have return successors, (133), 66 states have call predecessors, (133), 58 states have call successors, (133) [2021-11-20 06:54:06,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 550 transitions. [2021-11-20 06:54:06,111 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 550 transitions. Word has length 205 [2021-11-20 06:54:06,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:06,111 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 550 transitions. [2021-11-20 06:54:06,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.0) internal successors, (110), 8 states have internal predecessors, (110), 2 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 5 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-20 06:54:06,112 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 550 transitions. [2021-11-20 06:54:06,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-20 06:54:06,115 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:06,115 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:06,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 06:54:06,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:06,332 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:06,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:06,332 INFO L85 PathProgramCache]: Analyzing trace with hash -13076980, now seen corresponding path program 1 times [2021-11-20 06:54:06,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:06,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791113199] [2021-11-20 06:54:06,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:06,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:06,399 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:54:06,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [387954142] [2021-11-20 06:54:06,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:06,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:06,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:06,401 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:54:06,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 06:54:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:07,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 2621 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 06:54:07,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:54:08,470 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 41 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-20 06:54:08,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:54:11,483 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-20 06:54:11,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:11,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791113199] [2021-11-20 06:54:11,484 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:54:11,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387954142] [2021-11-20 06:54:11,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387954142] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:54:11,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:54:11,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-11-20 06:54:11,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058069260] [2021-11-20 06:54:11,484 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:54:11,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 06:54:11,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:11,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 06:54:11,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:54:11,486 INFO L87 Difference]: Start difference. First operand 418 states and 550 transitions. Second operand has 24 states, 22 states have (on average 7.545454545454546) internal successors, (166), 17 states have internal predecessors, (166), 6 states have call successors, (36), 2 states have call predecessors, (36), 9 states have return successors, (39), 11 states have call predecessors, (39), 6 states have call successors, (39) [2021-11-20 06:54:12,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:12,783 INFO L93 Difference]: Finished difference Result 629 states and 812 transitions. [2021-11-20 06:54:12,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:54:12,784 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 7.545454545454546) internal successors, (166), 17 states have internal predecessors, (166), 6 states have call successors, (36), 2 states have call predecessors, (36), 9 states have return successors, (39), 11 states have call predecessors, (39), 6 states have call successors, (39) Word has length 199 [2021-11-20 06:54:12,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:12,788 INFO L225 Difference]: With dead ends: 629 [2021-11-20 06:54:12,788 INFO L226 Difference]: Without dead ends: 393 [2021-11-20 06:54:12,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 373 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:54:12,791 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 21 mSDsluCounter, 4440 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 4668 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:12,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 4668 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 06:54:12,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-11-20 06:54:12,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 374. [2021-11-20 06:54:12,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 277 states have (on average 1.1552346570397112) internal successors, (320), 285 states have internal predecessors, (320), 54 states have call successors, (54), 30 states have call predecessors, (54), 42 states have return successors, (90), 59 states have call predecessors, (90), 53 states have call successors, (90) [2021-11-20 06:54:12,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 464 transitions. [2021-11-20 06:54:12,823 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 464 transitions. Word has length 199 [2021-11-20 06:54:12,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:12,823 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 464 transitions. [2021-11-20 06:54:12,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 7.545454545454546) internal successors, (166), 17 states have internal predecessors, (166), 6 states have call successors, (36), 2 states have call predecessors, (36), 9 states have return successors, (39), 11 states have call predecessors, (39), 6 states have call successors, (39) [2021-11-20 06:54:12,824 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 464 transitions. [2021-11-20 06:54:12,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-20 06:54:12,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:12,827 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:12,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-20 06:54:13,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-20 06:54:13,045 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:13,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:13,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1752761233, now seen corresponding path program 1 times [2021-11-20 06:54:13,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:13,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104105150] [2021-11-20 06:54:13,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:13,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:13,101 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:54:13,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835889733] [2021-11-20 06:54:13,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:13,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:13,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:13,103 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:54:13,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-20 06:54:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:13,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 2608 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-20 06:54:13,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:54:13,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:54:15,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:54:15,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-11-20 06:54:15,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 06:54:15,744 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 06:54:15,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-11-20 06:54:15,955 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 06:54:15,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 06:54:20,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:54:20,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-20 06:54:26,817 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~b#1| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~a#1| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| (* |aws_mul_size_checked_aws_mul_u64_checked_~b#1| |aws_mul_size_checked_aws_mul_u64_checked_~a#1|))))) is different from true [2021-11-20 06:54:43,793 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~b#1| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| Int) (|aws_mul_size_checked_aws_mul_u64_checked_~a#1| Int)) (and (<= |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| |c_aws_mul_size_checked_#in~r#1.offset|) (= |c_#memory_int| (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |aws_mul_size_checked_aws_mul_u64_checked_~r#1.offset| (* |aws_mul_size_checked_aws_mul_u64_checked_~b#1| |aws_mul_size_checked_aws_mul_u64_checked_~a#1|)))))) is different from true [2021-11-20 06:55:00,602 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 42 proven. 22 refuted. 0 times theorem prover too weak. 45 trivial. 3 not checked. [2021-11-20 06:55:00,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:55:03,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:03,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104105150] [2021-11-20 06:55:03,859 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:55:03,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835889733] [2021-11-20 06:55:03,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835889733] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:55:03,859 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:55:03,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-11-20 06:55:03,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896183039] [2021-11-20 06:55:03,859 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:55:03,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-20 06:55:03,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:03,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-20 06:55:03,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=875, Unknown=16, NotChecked=122, Total=1122 [2021-11-20 06:55:03,862 INFO L87 Difference]: Start difference. First operand 374 states and 464 transitions. Second operand has 33 states, 30 states have (on average 4.0) internal successors, (120), 29 states have internal predecessors, (120), 14 states have call successors, (27), 9 states have call predecessors, (27), 13 states have return successors, (26), 13 states have call predecessors, (26), 14 states have call successors, (26) [2021-11-20 06:55:51,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:51,316 INFO L93 Difference]: Finished difference Result 578 states and 721 transitions. [2021-11-20 06:55:51,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-20 06:55:51,317 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 4.0) internal successors, (120), 29 states have internal predecessors, (120), 14 states have call successors, (27), 9 states have call predecessors, (27), 13 states have return successors, (26), 13 states have call predecessors, (26), 14 states have call successors, (26) Word has length 193 [2021-11-20 06:55:51,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:51,321 INFO L225 Difference]: With dead ends: 578 [2021-11-20 06:55:51,321 INFO L226 Difference]: Without dead ends: 435 [2021-11-20 06:55:51,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 227 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 86.8s TimeCoverageRelationStatistics Valid=172, Invalid=1609, Unknown=33, NotChecked=166, Total=1980 [2021-11-20 06:55:51,324 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 274 mSDsluCounter, 1393 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 1591 SdHoareTripleChecker+Invalid, 3371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2378 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:51,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 1591 Invalid, 3371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 822 Invalid, 0 Unknown, 2378 Unchecked, 2.5s Time] [2021-11-20 06:55:51,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-11-20 06:55:51,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 400. [2021-11-20 06:55:51,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 298 states have (on average 1.157718120805369) internal successors, (345), 306 states have internal predecessors, (345), 56 states have call successors, (56), 31 states have call predecessors, (56), 45 states have return successors, (97), 63 states have call predecessors, (97), 55 states have call successors, (97) [2021-11-20 06:55:51,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 498 transitions. [2021-11-20 06:55:51,359 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 498 transitions. Word has length 193 [2021-11-20 06:55:51,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:51,360 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 498 transitions. [2021-11-20 06:55:51,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 4.0) internal successors, (120), 29 states have internal predecessors, (120), 14 states have call successors, (27), 9 states have call predecessors, (27), 13 states have return successors, (26), 13 states have call predecessors, (26), 14 states have call successors, (26) [2021-11-20 06:55:51,361 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 498 transitions. [2021-11-20 06:55:51,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-20 06:55:51,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:51,365 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:55:51,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-20 06:55:51,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-20 06:55:51,580 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:51,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:51,581 INFO L85 PathProgramCache]: Analyzing trace with hash -16710381, now seen corresponding path program 1 times [2021-11-20 06:55:51,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:51,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448057715] [2021-11-20 06:55:51,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:51,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:51,666 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:55:51,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328012019] [2021-11-20 06:55:51,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:51,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:55:51,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:55:51,668 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:55:51,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-20 06:55:52,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:52,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 2605 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-20 06:55:52,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:55:53,557 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-20 06:55:53,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:55:55,177 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-20 06:55:55,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:55,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448057715] [2021-11-20 06:55:55,178 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:55:55,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328012019] [2021-11-20 06:55:55,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328012019] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:55:55,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:55:55,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2021-11-20 06:55:55,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916613611] [2021-11-20 06:55:55,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:55:55,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:55:55,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:55,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:55:55,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:55:55,181 INFO L87 Difference]: Start difference. First operand 400 states and 498 transitions. Second operand has 13 states, 10 states have (on average 13.7) internal successors, (137), 13 states have internal predecessors, (137), 5 states have call successors, (35), 2 states have call predecessors, (35), 4 states have return successors, (34), 3 states have call predecessors, (34), 5 states have call successors, (34) [2021-11-20 06:55:56,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:56,024 INFO L93 Difference]: Finished difference Result 581 states and 750 transitions. [2021-11-20 06:55:56,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:55:56,025 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 13.7) internal successors, (137), 13 states have internal predecessors, (137), 5 states have call successors, (35), 2 states have call predecessors, (35), 4 states have return successors, (34), 3 states have call predecessors, (34), 5 states have call successors, (34) Word has length 193 [2021-11-20 06:55:56,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:56,029 INFO L225 Difference]: With dead ends: 581 [2021-11-20 06:55:56,030 INFO L226 Difference]: Without dead ends: 415 [2021-11-20 06:55:56,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:55:56,032 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 65 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1602 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:56,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 1602 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:55:56,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-11-20 06:55:56,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 409. [2021-11-20 06:55:56,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 307 states have (on average 1.1628664495114007) internal successors, (357), 315 states have internal predecessors, (357), 56 states have call successors, (56), 31 states have call predecessors, (56), 45 states have return successors, (97), 63 states have call predecessors, (97), 55 states have call successors, (97) [2021-11-20 06:55:56,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 510 transitions. [2021-11-20 06:55:56,066 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 510 transitions. Word has length 193 [2021-11-20 06:55:56,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:56,067 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 510 transitions. [2021-11-20 06:55:56,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 13.7) internal successors, (137), 13 states have internal predecessors, (137), 5 states have call successors, (35), 2 states have call predecessors, (35), 4 states have return successors, (34), 3 states have call predecessors, (34), 5 states have call successors, (34) [2021-11-20 06:55:56,068 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 510 transitions. [2021-11-20 06:55:56,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-20 06:55:56,071 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:56,071 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:55:56,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-20 06:55:56,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-20 06:55:56,286 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:56,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:56,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1529453249, now seen corresponding path program 1 times [2021-11-20 06:55:56,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:56,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912561872] [2021-11-20 06:55:56,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:56,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:56,400 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:55:56,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1071861189] [2021-11-20 06:55:56,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:56,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:55:56,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:55:56,402 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:55:56,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-20 06:55:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:56,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 2656 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:55:56,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:55:57,665 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-20 06:55:57,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:55:57,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:57,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912561872] [2021-11-20 06:55:57,666 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:55:57,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071861189] [2021-11-20 06:55:57,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071861189] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:57,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:55:57,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 06:55:57,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247977202] [2021-11-20 06:55:57,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:57,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:55:57,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:57,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:55:57,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:55:57,668 INFO L87 Difference]: Start difference. First operand 409 states and 510 transitions. Second operand has 9 states, 8 states have (on average 13.375) internal successors, (107), 9 states have internal predecessors, (107), 6 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 5 states have call predecessors, (25), 6 states have call successors, (25) [2021-11-20 06:55:58,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:58,525 INFO L93 Difference]: Finished difference Result 575 states and 716 transitions. [2021-11-20 06:55:58,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:55:58,525 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 13.375) internal successors, (107), 9 states have internal predecessors, (107), 6 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 5 states have call predecessors, (25), 6 states have call successors, (25) Word has length 205 [2021-11-20 06:55:58,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:58,529 INFO L225 Difference]: With dead ends: 575 [2021-11-20 06:55:58,529 INFO L226 Difference]: Without dead ends: 406 [2021-11-20 06:55:58,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:55:58,531 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 233 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:58,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 1091 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:55:58,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-11-20 06:55:58,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 406. [2021-11-20 06:55:58,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 305 states have (on average 1.157377049180328) internal successors, (353), 313 states have internal predecessors, (353), 56 states have call successors, (56), 31 states have call predecessors, (56), 44 states have return successors, (96), 62 states have call predecessors, (96), 55 states have call successors, (96) [2021-11-20 06:55:58,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 505 transitions. [2021-11-20 06:55:58,565 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 505 transitions. Word has length 205 [2021-11-20 06:55:58,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:58,566 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 505 transitions. [2021-11-20 06:55:58,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 13.375) internal successors, (107), 9 states have internal predecessors, (107), 6 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 5 states have call predecessors, (25), 6 states have call successors, (25) [2021-11-20 06:55:58,567 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 505 transitions. [2021-11-20 06:55:58,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-20 06:55:58,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:58,571 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:55:58,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-20 06:55:58,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:55:58,784 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:58,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:58,785 INFO L85 PathProgramCache]: Analyzing trace with hash -2089690696, now seen corresponding path program 1 times [2021-11-20 06:55:58,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:58,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455769921] [2021-11-20 06:55:58,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:58,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:58,834 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:55:58,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1637787040] [2021-11-20 06:55:58,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:58,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:55:58,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:55:58,837 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:55:58,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-20 06:55:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:59,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 2791 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:55:59,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:55:59,963 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-20 06:55:59,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:56:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-20 06:56:01,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:56:01,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455769921] [2021-11-20 06:56:01,310 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:56:01,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637787040] [2021-11-20 06:56:01,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637787040] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:56:01,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:56:01,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-11-20 06:56:01,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97482646] [2021-11-20 06:56:01,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:56:01,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:56:01,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:56:01,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:56:01,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:56:01,314 INFO L87 Difference]: Start difference. First operand 406 states and 505 transitions. Second operand has 13 states, 11 states have (on average 11.0) internal successors, (121), 13 states have internal predecessors, (121), 6 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (31), 6 states have call predecessors, (31), 6 states have call successors, (31) [2021-11-20 06:56:01,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:56:01,716 INFO L93 Difference]: Finished difference Result 561 states and 696 transitions. [2021-11-20 06:56:01,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:56:01,719 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 11.0) internal successors, (121), 13 states have internal predecessors, (121), 6 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (31), 6 states have call predecessors, (31), 6 states have call successors, (31) Word has length 226 [2021-11-20 06:56:01,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:56:01,722 INFO L225 Difference]: With dead ends: 561 [2021-11-20 06:56:01,723 INFO L226 Difference]: Without dead ends: 409 [2021-11-20 06:56:01,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:56:01,725 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 23 mSDsluCounter, 1319 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 1510 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:56:01,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 1510 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:56:01,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-11-20 06:56:01,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 408. [2021-11-20 06:56:01,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 307 states have (on average 1.1563517915309447) internal successors, (355), 315 states have internal predecessors, (355), 56 states have call successors, (56), 31 states have call predecessors, (56), 44 states have return successors, (96), 62 states have call predecessors, (96), 55 states have call successors, (96) [2021-11-20 06:56:01,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 507 transitions. [2021-11-20 06:56:01,758 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 507 transitions. Word has length 226 [2021-11-20 06:56:01,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:56:01,759 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 507 transitions. [2021-11-20 06:56:01,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 11.0) internal successors, (121), 13 states have internal predecessors, (121), 6 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (31), 6 states have call predecessors, (31), 6 states have call successors, (31) [2021-11-20 06:56:01,760 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 507 transitions. [2021-11-20 06:56:01,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-20 06:56:01,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:56:01,764 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:56:01,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-20 06:56:01,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-20 06:56:01,981 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:56:01,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:56:01,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1940716689, now seen corresponding path program 1 times [2021-11-20 06:56:01,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:56:01,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021318107] [2021-11-20 06:56:01,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:56:01,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:56:02,084 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:56:02,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597584285] [2021-11-20 06:56:02,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:56:02,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:56:02,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:56:02,088 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:56:02,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-20 06:56:02,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:56:02,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 2782 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-20 06:56:02,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:56:03,457 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-20 06:56:03,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:56:05,218 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-20 06:56:05,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:56:05,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021318107] [2021-11-20 06:56:05,218 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:56:05,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597584285] [2021-11-20 06:56:05,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597584285] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:56:05,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:56:05,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-11-20 06:56:05,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725952660] [2021-11-20 06:56:05,219 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:56:05,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:56:05,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:56:05,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:56:05,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:56:05,221 INFO L87 Difference]: Start difference. First operand 408 states and 507 transitions. Second operand has 16 states, 13 states have (on average 9.307692307692308) internal successors, (121), 16 states have internal predecessors, (121), 7 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (31), 6 states have call predecessors, (31), 7 states have call successors, (31) [2021-11-20 06:56:05,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:56:05,674 INFO L93 Difference]: Finished difference Result 565 states and 700 transitions. [2021-11-20 06:56:05,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:56:05,675 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 9.307692307692308) internal successors, (121), 16 states have internal predecessors, (121), 7 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (31), 6 states have call predecessors, (31), 7 states have call successors, (31) Word has length 222 [2021-11-20 06:56:05,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:56:05,678 INFO L225 Difference]: With dead ends: 565 [2021-11-20 06:56:05,678 INFO L226 Difference]: Without dead ends: 411 [2021-11-20 06:56:05,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 428 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:56:05,680 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 39 mSDsluCounter, 1672 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1863 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:56:05,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 1863 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:56:05,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-11-20 06:56:05,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 410. [2021-11-20 06:56:05,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 309 states have (on average 1.1553398058252426) internal successors, (357), 317 states have internal predecessors, (357), 56 states have call successors, (56), 31 states have call predecessors, (56), 44 states have return successors, (96), 62 states have call predecessors, (96), 55 states have call successors, (96) [2021-11-20 06:56:05,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 509 transitions. [2021-11-20 06:56:05,713 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 509 transitions. Word has length 222 [2021-11-20 06:56:05,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:56:05,713 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 509 transitions. [2021-11-20 06:56:05,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 9.307692307692308) internal successors, (121), 16 states have internal predecessors, (121), 7 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (31), 6 states have call predecessors, (31), 7 states have call successors, (31) [2021-11-20 06:56:05,714 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 509 transitions. [2021-11-20 06:56:05,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-20 06:56:05,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:56:05,718 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:56:05,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-20 06:56:05,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:56:05,944 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:56:05,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:56:05,945 INFO L85 PathProgramCache]: Analyzing trace with hash 835796707, now seen corresponding path program 2 times [2021-11-20 06:56:05,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:56:05,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375843691] [2021-11-20 06:56:05,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:56:05,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:56:05,993 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:56:05,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [955486802] [2021-11-20 06:56:05,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:56:05,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:56:05,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:56:05,995 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:56:06,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-20 06:56:06,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:56:06,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:56:06,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 2661 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-20 06:56:06,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:56:07,853 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 73 proven. 30 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-20 06:56:07,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:56:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-11-20 06:56:09,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:56:09,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375843691] [2021-11-20 06:56:09,617 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:56:09,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955486802] [2021-11-20 06:56:09,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955486802] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:56:09,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:56:09,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-11-20 06:56:09,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229332583] [2021-11-20 06:56:09,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:56:09,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 06:56:09,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:56:09,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 06:56:09,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:56:09,619 INFO L87 Difference]: Start difference. First operand 410 states and 509 transitions. Second operand has 20 states, 18 states have (on average 7.388888888888889) internal successors, (133), 20 states have internal predecessors, (133), 6 states have call successors, (29), 2 states have call predecessors, (29), 5 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2021-11-20 06:56:10,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:56:10,458 INFO L93 Difference]: Finished difference Result 575 states and 725 transitions. [2021-11-20 06:56:10,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:56:10,459 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 7.388888888888889) internal successors, (133), 20 states have internal predecessors, (133), 6 states have call successors, (29), 2 states have call predecessors, (29), 5 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) Word has length 215 [2021-11-20 06:56:10,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:56:10,463 INFO L225 Difference]: With dead ends: 575 [2021-11-20 06:56:10,463 INFO L226 Difference]: Without dead ends: 419 [2021-11-20 06:56:10,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:56:10,465 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 35 mSDsluCounter, 2422 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2627 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:56:10,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 2627 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:56:10,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-11-20 06:56:10,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 412. [2021-11-20 06:56:10,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 311 states have (on average 1.1543408360128617) internal successors, (359), 319 states have internal predecessors, (359), 56 states have call successors, (56), 31 states have call predecessors, (56), 44 states have return successors, (96), 62 states have call predecessors, (96), 55 states have call successors, (96) [2021-11-20 06:56:10,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 511 transitions. [2021-11-20 06:56:10,498 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 511 transitions. Word has length 215 [2021-11-20 06:56:10,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:56:10,498 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 511 transitions. [2021-11-20 06:56:10,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 7.388888888888889) internal successors, (133), 20 states have internal predecessors, (133), 6 states have call successors, (29), 2 states have call predecessors, (29), 5 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2021-11-20 06:56:10,499 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 511 transitions. [2021-11-20 06:56:10,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-20 06:56:10,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:56:10,503 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:56:10,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-20 06:56:10,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-20 06:56:10,728 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:56:10,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:56:10,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1398750254, now seen corresponding path program 2 times [2021-11-20 06:56:10,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:56:10,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896312081] [2021-11-20 06:56:10,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:56:10,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:56:10,790 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:56:10,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602992092] [2021-11-20 06:56:10,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:56:10,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:56:10,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:56:10,792 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:56:10,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-20 06:56:11,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:56:11,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:56:11,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 2812 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 06:56:11,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:56:12,587 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-20 06:56:12,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:56:12,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:56:12,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896312081] [2021-11-20 06:56:12,588 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:56:12,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602992092] [2021-11-20 06:56:12,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602992092] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:56:12,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:56:12,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-20 06:56:12,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212552414] [2021-11-20 06:56:12,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:56:12,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 06:56:12,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:56:12,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 06:56:12,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:56:12,593 INFO L87 Difference]: Start difference. First operand 412 states and 511 transitions. Second operand has 15 states, 15 states have (on average 8.2) internal successors, (123), 11 states have internal predecessors, (123), 3 states have call successors, (27), 2 states have call predecessors, (27), 7 states have return successors, (27), 6 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-20 06:56:13,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:56:13,663 INFO L93 Difference]: Finished difference Result 572 states and 710 transitions. [2021-11-20 06:56:13,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:56:13,663 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.2) internal successors, (123), 11 states have internal predecessors, (123), 3 states have call successors, (27), 2 states have call predecessors, (27), 7 states have return successors, (27), 6 states have call predecessors, (27), 3 states have call successors, (27) Word has length 232 [2021-11-20 06:56:13,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:56:13,666 INFO L225 Difference]: With dead ends: 572 [2021-11-20 06:56:13,666 INFO L226 Difference]: Without dead ends: 416 [2021-11-20 06:56:13,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:56:13,670 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 15 mSDsluCounter, 2539 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2739 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:56:13,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 2739 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 06:56:13,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-11-20 06:56:13,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 412. [2021-11-20 06:56:13,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 311 states have (on average 1.1543408360128617) internal successors, (359), 319 states have internal predecessors, (359), 56 states have call successors, (56), 31 states have call predecessors, (56), 44 states have return successors, (94), 62 states have call predecessors, (94), 55 states have call successors, (94) [2021-11-20 06:56:13,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 509 transitions. [2021-11-20 06:56:13,703 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 509 transitions. Word has length 232 [2021-11-20 06:56:13,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:56:13,704 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 509 transitions. [2021-11-20 06:56:13,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.2) internal successors, (123), 11 states have internal predecessors, (123), 3 states have call successors, (27), 2 states have call predecessors, (27), 7 states have return successors, (27), 6 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-20 06:56:13,704 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 509 transitions. [2021-11-20 06:56:13,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-20 06:56:13,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:56:13,710 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:56:13,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-20 06:56:13,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:56:13,927 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:56:13,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:56:13,927 INFO L85 PathProgramCache]: Analyzing trace with hash 344427552, now seen corresponding path program 1 times [2021-11-20 06:56:13,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:56:13,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508821917] [2021-11-20 06:56:13,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:56:13,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:56:13,970 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:56:13,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627117634] [2021-11-20 06:56:13,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:56:13,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:56:13,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:56:13,972 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:56:14,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-20 06:56:14,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:56:14,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 2781 conjuncts, 134 conjunts are in the unsatisfiable core [2021-11-20 06:56:14,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:56:17,772 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| (select (select |c_#memory_$Pointer$.offset| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset|)))) (= (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| (select (select |c_#memory_$Pointer$.base| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset|))) |c_#memory_$Pointer$.base|))) is different from true [2021-11-20 06:56:19,903 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (and (= (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 (select (select |c_#memory_$Pointer$.base| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0))) |c_#memory_$Pointer$.base|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 (select (select |c_#memory_$Pointer$.offset| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0)))))) is different from true [2021-11-20 06:56:20,110 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-20 06:56:20,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 50 [2021-11-20 06:56:20,181 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-20 06:56:20,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 48 [2021-11-20 06:57:36,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-11-20 06:57:36,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 06:57:46,438 WARN L860 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (v_DerPreprocessor_6 Int) (v_DerPreprocessor_5 Int)) (let ((.cse0 (+ |c_aws_array_list_clean_up_#in~list.offset| 32))) (and (= (select (select (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 v_DerPreprocessor_5)) |c_aws_array_list_clean_up_#in~list.base|) .cse0) 0) (= (select (select (store |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 v_DerPreprocessor_6)) |c_aws_array_list_clean_up_#in~list.base|) .cse0) 0)))) is different from true [2021-11-20 06:57:46,762 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 63 proven. 17 refuted. 0 times theorem prover too weak. 105 trivial. 16 not checked. [2021-11-20 06:57:46,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:57:50,915 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_216| Int) (v_DerPreprocessor_8 Int) (v_DerPreprocessor_7 Int)) (let ((.cse0 (+ 40 |c_ULTIMATE.start_aws_priority_queue_clean_up_~queue#1.offset|))) (or (not (= (select (select (store |c_#memory_$Pointer$.offset| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_216| (store (select |c_#memory_$Pointer$.offset| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_216|) 0 v_DerPreprocessor_7)) |c_ULTIMATE.start_aws_priority_queue_clean_up_~queue#1.base|) .cse0) 0)) (not (= (select (select (store |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_216| (store (select |c_#memory_$Pointer$.base| |v_aws_mul_size_checked_aws_mul_u64_checked_~r#1.base_216|) 0 v_DerPreprocessor_8)) |c_ULTIMATE.start_aws_priority_queue_clean_up_~queue#1.base|) .cse0) 0))))) is different from false [2021-11-20 06:57:50,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:57:50,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508821917] [2021-11-20 06:57:50,920 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:57:50,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627117634] [2021-11-20 06:57:50,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627117634] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:57:50,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:57:50,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-11-20 06:57:50,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322274892] [2021-11-20 06:57:50,922 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:57:50,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 06:57:50,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:57:50,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 06:57:50,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=709, Unknown=32, NotChecked=228, Total=1056 [2021-11-20 06:57:50,925 INFO L87 Difference]: Start difference. First operand 412 states and 509 transitions. Second operand has 32 states, 28 states have (on average 4.285714285714286) internal successors, (120), 30 states have internal predecessors, (120), 16 states have call successors, (26), 5 states have call predecessors, (26), 10 states have return successors, (25), 14 states have call predecessors, (25), 16 states have call successors, (25) [2021-11-20 06:57:57,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:57:57,439 INFO L93 Difference]: Finished difference Result 626 states and 778 transitions. [2021-11-20 06:57:57,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-20 06:57:57,440 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 4.285714285714286) internal successors, (120), 30 states have internal predecessors, (120), 16 states have call successors, (26), 5 states have call predecessors, (26), 10 states have return successors, (25), 14 states have call predecessors, (25), 16 states have call successors, (25) Word has length 222 [2021-11-20 06:57:57,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:57:57,444 INFO L225 Difference]: With dead ends: 626 [2021-11-20 06:57:57,444 INFO L226 Difference]: Without dead ends: 486 [2021-11-20 06:57:57,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 222 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 91.9s TimeCoverageRelationStatistics Valid=117, Invalid=1057, Unknown=32, NotChecked=276, Total=1482 [2021-11-20 06:57:57,446 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 113 mSDsluCounter, 2433 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 2658 SdHoareTripleChecker+Invalid, 3296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1859 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:57:57,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 2658 Invalid, 3296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1394 Invalid, 0 Unknown, 1859 Unchecked, 5.6s Time] [2021-11-20 06:57:57,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-11-20 06:57:57,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 459. [2021-11-20 06:57:57,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 347 states have (on average 1.1498559077809798) internal successors, (399), 356 states have internal predecessors, (399), 61 states have call successors, (61), 34 states have call predecessors, (61), 50 states have return successors, (110), 69 states have call predecessors, (110), 60 states have call successors, (110) [2021-11-20 06:57:57,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 570 transitions. [2021-11-20 06:57:57,483 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 570 transitions. Word has length 222 [2021-11-20 06:57:57,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:57:57,484 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 570 transitions. [2021-11-20 06:57:57,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 4.285714285714286) internal successors, (120), 30 states have internal predecessors, (120), 16 states have call successors, (26), 5 states have call predecessors, (26), 10 states have return successors, (25), 14 states have call predecessors, (25), 16 states have call successors, (25) [2021-11-20 06:57:57,485 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 570 transitions. [2021-11-20 06:57:57,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-20 06:57:57,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:57:57,489 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:57:57,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-20 06:57:57,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-20 06:57:57,716 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:57:57,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:57:57,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1496376065, now seen corresponding path program 3 times [2021-11-20 06:57:57,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:57:57,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066699171] [2021-11-20 06:57:57,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:57:57,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:57:57,796 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:57:57,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [318427031] [2021-11-20 06:57:57,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:57:57,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:57:57,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:57:57,798 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:57:57,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f1df01-5736-458c-bb24-ba230f13afe0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-20 06:58:00,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-20 06:58:00,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:58:00,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 2587 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-20 06:58:00,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:58:01,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 06:58:01,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 06:58:02,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:02,403 INFO L354 Elim1Store]: treesize reduction 100, result has 29.1 percent of original size [2021-11-20 06:58:02,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 147 treesize of output 175 [2021-11-20 06:58:02,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:02,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-20 06:58:02,690 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:58:02,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-11-20 06:58:03,088 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 15 treesize of output 7 [2021-11-20 06:58:03,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:03,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-20 06:58:03,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:03,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-20 06:58:03,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:03,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-11-20 06:58:03,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:03,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-11-20 06:58:04,915 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-11-20 06:58:04,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 94 [2021-11-20 06:58:05,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:05,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 20 [2021-11-20 06:58:06,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:06,681 INFO L354 Elim1Store]: treesize reduction 100, result has 29.1 percent of original size [2021-11-20 06:58:06,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 147 treesize of output 175 [2021-11-20 06:58:06,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:06,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-11-20 06:58:06,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:06,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-11-20 06:58:07,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:07,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-20 06:58:07,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:58:07,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-11-20 06:58:07,596 INFO L354 Elim1Store]: treesize reduction 6, result has 50.0 percent of original size [2021-11-20 06:58:07,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-11-20 06:58:07,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:07,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-20 06:58:07,999 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 13 treesize of output 5 [2021-11-20 06:58:09,451 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-11-20 06:58:09,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 76 [2021-11-20 06:58:09,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:09,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-11-20 06:58:09,623 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-11-20 06:58:09,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 74 [2021-11-20 06:58:09,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:09,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-11-20 06:58:09,795 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 06:58:10,191 INFO L354 Elim1Store]: treesize reduction 100, result has 29.1 percent of original size [2021-11-20 06:58:10,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 147 treesize of output 175 [2021-11-20 06:58:10,305 INFO L354 Elim1Store]: treesize reduction 6, result has 50.0 percent of original size [2021-11-20 06:58:10,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 21 [2021-11-20 06:58:10,456 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 15 treesize of output 7 [2021-11-20 06:58:10,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:10,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-20 06:58:10,857 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 13 treesize of output 5 [2021-11-20 06:58:11,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:11,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-20 06:58:11,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:11,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-20 06:58:11,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:11,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-11-20 06:58:11,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:11,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-11-20 06:58:13,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:13,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 20 [2021-11-20 06:58:13,297 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-11-20 06:58:13,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 94 [2021-11-20 06:58:17,394 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 83 proven. 12 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-11-20 06:58:17,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:58:22,544 INFO L354 Elim1Store]: treesize reduction 2152, result has 15.4 percent of original size [2021-11-20 06:58:22,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 8 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 407 treesize of output 527 [2021-11-20 06:58:22,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:22,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:22,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:22,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:22,761 INFO L354 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2021-11-20 06:58:22,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 17 [2021-11-20 06:58:23,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:23,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:23,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:23,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:23,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:23,049 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-20 06:58:23,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 17 [2021-11-20 06:58:23,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:23,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:23,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:23,316 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-20 06:58:23,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 17 [2021-11-20 06:58:24,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:24,182 INFO L354 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2021-11-20 06:58:24,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 17 [2021-11-20 06:58:24,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:24,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:24,457 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-20 06:58:24,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 17 [2021-11-20 06:58:24,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:24,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:24,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:24,705 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-20 06:58:24,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 17 [2021-11-20 06:58:25,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:25,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:25,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:25,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:25,666 INFO L354 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2021-11-20 06:58:25,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 17 [2021-11-20 06:58:25,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:25,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:25,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:25,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:25,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:25,917 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-20 06:58:25,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 17 [2021-11-20 06:58:26,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:26,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:26,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:26,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:26,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:26,510 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-20 06:58:26,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 17 [2021-11-20 06:58:27,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:27,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:27,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:27,307 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-20 06:58:27,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 17 [2021-11-20 06:58:27,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:27,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:27,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:27,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:27,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:27,720 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-20 06:58:27,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 17 [2021-11-20 06:58:28,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:28,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:28,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:28,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:28,045 INFO L354 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2021-11-20 06:58:28,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 17 [2021-11-20 06:58:28,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:28,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:28,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:28,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:28,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:28,912 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-20 06:58:28,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 17 [2021-11-20 06:58:29,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:29,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:29,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:29,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:29,251 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-20 06:58:29,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 17 [2021-11-20 06:58:29,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:29,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:29,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:29,565 INFO L354 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2021-11-20 06:58:29,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 17 [2021-11-20 06:58:30,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:30,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:30,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:30,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:30,766 INFO L354 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2021-11-20 06:58:30,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 17 [2021-11-20 06:58:30,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:30,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:30,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:30,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:30,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:30,921 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-20 06:58:30,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 17 [2021-11-20 06:58:31,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:31,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:31,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:31,227 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-20 06:58:31,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 17 [2021-11-20 06:58:32,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:32,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:32,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:32,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:32,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:32,445 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-20 06:58:32,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 17 [2021-11-20 06:58:32,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:32,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:32,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:32,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:32,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:32,825 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-20 06:58:32,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 17 [2021-11-20 06:58:33,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:33,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:33,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:33,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:33,618 INFO L354 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2021-11-20 06:58:33,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 17 [2021-11-20 06:59:23,470 INFO L354 Elim1Store]: treesize reduction 335, result has 30.8 percent of original size [2021-11-20 06:59:23,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 349 treesize of output 428