./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lookup_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_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/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_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lookup_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/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_5e9fb163-e157-4b1a-a079-4978f9fb1593/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 0658a835d559c56129f1a85a00e9d3bbd205d66ef64b5c7d14ae72b3d1b496e0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:38:07,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:38:07,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:38:07,984 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:38:07,985 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:38:07,986 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:38:07,988 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:38:07,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:38:07,993 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:38:07,994 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:38:07,995 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:38:07,997 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:38:07,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:38:07,999 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:38:08,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:38:08,002 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:38:08,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:38:08,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:38:08,007 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:38:08,010 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:38:08,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:38:08,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:38:08,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:38:08,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:38:08,020 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:38:08,020 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:38:08,021 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:38:08,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:38:08,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:38:08,024 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:38:08,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:38:08,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:38:08,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:38:08,027 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:38:08,028 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:38:08,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:38:08,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:38:08,030 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:38:08,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:38:08,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:38:08,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:38:08,034 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-20 06:38:08,078 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:38:08,078 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:38:08,079 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:38:08,079 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:38:08,079 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:38:08,080 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:38:08,080 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:38:08,081 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:38:08,081 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:38:08,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:38:08,081 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:38:08,081 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:38:08,082 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:38:08,082 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:38:08,082 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:38:08,082 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:38:08,082 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:38:08,083 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:38:08,083 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:38:08,083 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:38:08,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:38:08,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:38:08,084 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:38:08,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:38:08,084 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:38:08,084 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:38:08,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:38:08,085 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:38:08,085 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:38:08,085 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:38:08,093 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:38:08,093 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_5e9fb163-e157-4b1a-a079-4978f9fb1593/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0658a835d559c56129f1a85a00e9d3bbd205d66ef64b5c7d14ae72b3d1b496e0 [2021-11-20 06:38:08,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:38:08,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:38:08,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:38:08,397 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:38:08,398 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:38:08,399 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lookup_harness.i [2021-11-20 06:38:08,469 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/data/16daa9484/79a65320a0d74006a3791bd24a6675f5/FLAG9c5834556 [2021-11-20 06:38:09,315 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:38:09,316 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lookup_harness.i [2021-11-20 06:38:09,368 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/data/16daa9484/79a65320a0d74006a3791bd24a6675f5/FLAG9c5834556 [2021-11-20 06:38:09,788 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/data/16daa9484/79a65320a0d74006a3791bd24a6675f5 [2021-11-20 06:38:09,790 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:38:09,797 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:38:09,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:38:09,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:38:09,802 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:38:09,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:38:09" (1/1) ... [2021-11-20 06:38:09,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e1423db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:09, skipping insertion in model container [2021-11-20 06:38:09,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:38:09" (1/1) ... [2021-11-20 06:38:09,815 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:38:09,944 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:38:10,227 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_5e9fb163-e157-4b1a-a079-4978f9fb1593/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lookup_harness.i[4504,4517] [2021-11-20 06:38:10,234 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_5e9fb163-e157-4b1a-a079-4978f9fb1593/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lookup_harness.i[4564,4577] [2021-11-20 06:38:11,432 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:38:11,439 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:38:11,441 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:38:11,442 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:38:11,446 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:38:11,470 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:38:11,471 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:38:11,477 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:38:11,479 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:38:11,909 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 06:38:11,911 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 06:38:11,912 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 06:38:11,913 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 06:38:11,914 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 06:38:11,915 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 06:38:11,916 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 06:38:11,917 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 06:38:11,918 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 06:38:11,919 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 06:38:12,071 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 06:38:12,235 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:38:12,236 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:38:12,305 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:38:12,382 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:38:12,409 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_5e9fb163-e157-4b1a-a079-4978f9fb1593/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lookup_harness.i[4504,4517] [2021-11-20 06:38:12,411 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_5e9fb163-e157-4b1a-a079-4978f9fb1593/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lookup_harness.i[4564,4577] [2021-11-20 06:38:12,484 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:38:12,485 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:38:12,486 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:38:12,486 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:38:12,487 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:38:12,497 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:38:12,502 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:38:12,503 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:38:12,507 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:38:12,562 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 06:38:12,563 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 06:38:12,564 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 06:38:12,565 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 06:38:12,566 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 06:38:12,567 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 06:38:12,568 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 06:38:12,568 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 06:38:12,569 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 06:38:12,569 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 06:38:12,604 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 06:38:12,689 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:38:12,691 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 06:38:12,784 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:38:13,063 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:38:13,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:13 WrapperNode [2021-11-20 06:38:13,064 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:38:13,066 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:38:13,066 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:38:13,066 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:38:13,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:13" (1/1) ... [2021-11-20 06:38:13,216 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:13" (1/1) ... [2021-11-20 06:38:13,333 INFO L137 Inliner]: procedures = 691, calls = 2649, calls flagged for inlining = 58, calls inlined = 4, statements flattened = 829 [2021-11-20 06:38:13,334 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:38:13,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:38:13,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:38:13,336 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:38:13,346 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:13" (1/1) ... [2021-11-20 06:38:13,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:13" (1/1) ... [2021-11-20 06:38:13,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:13" (1/1) ... [2021-11-20 06:38:13,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:13" (1/1) ... [2021-11-20 06:38:13,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:13" (1/1) ... [2021-11-20 06:38:13,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:13" (1/1) ... [2021-11-20 06:38:13,458 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:13" (1/1) ... [2021-11-20 06:38:13,480 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:38:13,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:38:13,485 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:38:13,485 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:38:13,486 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:13" (1/1) ... [2021-11-20 06:38:13,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:38:13,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:13,523 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:38:13,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:38:13,589 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-11-20 06:38:13,589 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-11-20 06:38:13,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:38:13,589 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-20 06:38:13,590 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-20 06:38:13,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:38:13,590 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_bounded [2021-11-20 06:38:13,590 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_bounded [2021-11-20 06:38:13,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 06:38:13,591 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 06:38:13,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 06:38:13,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:38:13,592 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-11-20 06:38:13,593 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-11-20 06:38:13,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 06:38:13,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:38:13,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:38:13,594 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-20 06:38:13,594 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-20 06:38:13,594 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-20 06:38:13,595 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-20 06:38:13,595 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 06:38:13,595 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 06:38:13,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:38:13,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 06:38:13,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 06:38:13,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:38:13,596 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_byte_cursor_has_allocated_buffer_member [2021-11-20 06:38:13,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_byte_cursor_has_allocated_buffer_member [2021-11-20 06:38:13,596 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_compare_lookup [2021-11-20 06:38:13,597 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_compare_lookup [2021-11-20 06:38:13,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:38:13,888 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:38:13,890 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:38:15,329 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:38:15,342 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:38:15,343 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:38:15,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:38:15 BoogieIcfgContainer [2021-11-20 06:38:15,345 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:38:15,349 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:38:15,349 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:38:15,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:38:15,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:38:09" (1/3) ... [2021-11-20 06:38:15,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b7ccdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:38:15, skipping insertion in model container [2021-11-20 06:38:15,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:13" (2/3) ... [2021-11-20 06:38:15,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b7ccdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:38:15, skipping insertion in model container [2021-11-20 06:38:15,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:38:15" (3/3) ... [2021-11-20 06:38:15,356 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_compare_lookup_harness.i [2021-11-20 06:38:15,362 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:38:15,362 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:38:15,426 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:38:15,442 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 06:38:15,443 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:38:15,471 INFO L276 IsEmpty]: Start isEmpty. Operand has 133 states, 80 states have (on average 1.2625) internal successors, (101), 81 states have internal predecessors, (101), 41 states have call successors, (41), 10 states have call predecessors, (41), 10 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2021-11-20 06:38:15,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-20 06:38:15,490 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:15,491 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 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] [2021-11-20 06:38:15,491 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:15,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:15,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1628753842, now seen corresponding path program 1 times [2021-11-20 06:38:15,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:15,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190298075] [2021-11-20 06:38:15,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:15,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:15,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:16,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:38:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:16,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:38:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:16,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:38:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:16,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:38:16,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:16,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:38:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:16,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:38:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:16,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:38:16,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:16,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-20 06:38:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:16,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-20 06:38:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:16,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-20 06:38:16,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:16,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 06:38:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:16,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:38:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:16,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-20 06:38:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:16,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:38:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:16,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-20 06:38:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-20 06:38:16,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:16,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190298075] [2021-11-20 06:38:16,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190298075] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:38:16,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:38:16,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:38:16,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774822143] [2021-11-20 06:38:16,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:38:16,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:38:16,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:16,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:38:16,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:38:16,556 INFO L87 Difference]: Start difference. First operand has 133 states, 80 states have (on average 1.2625) internal successors, (101), 81 states have internal predecessors, (101), 41 states have call successors, (41), 10 states have call predecessors, (41), 10 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:38:17,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:17,048 INFO L93 Difference]: Finished difference Result 265 states and 391 transitions. [2021-11-20 06:38:17,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:38:17,051 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 95 [2021-11-20 06:38:17,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:17,064 INFO L225 Difference]: With dead ends: 265 [2021-11-20 06:38:17,065 INFO L226 Difference]: Without dead ends: 130 [2021-11-20 06:38:17,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:38:17,085 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 63 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:17,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 201 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:38:17,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-20 06:38:17,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2021-11-20 06:38:17,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 75 states have (on average 1.2266666666666666) internal successors, (92), 76 states have internal predecessors, (92), 41 states have call successors, (41), 10 states have call predecessors, (41), 10 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2021-11-20 06:38:17,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 173 transitions. [2021-11-20 06:38:17,156 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 173 transitions. Word has length 95 [2021-11-20 06:38:17,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:17,157 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 173 transitions. [2021-11-20 06:38:17,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:38:17,157 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 173 transitions. [2021-11-20 06:38:17,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-20 06:38:17,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:17,163 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 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] [2021-11-20 06:38:17,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:38:17,164 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:17,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:17,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1573250628, now seen corresponding path program 1 times [2021-11-20 06:38:17,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:17,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938812749] [2021-11-20 06:38:17,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:17,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:17,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:17,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:38:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:17,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:38:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:17,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:38:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:17,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:38:17,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:17,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:38:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:17,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:38:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:17,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:38:17,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:17,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-20 06:38:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:17,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-20 06:38:17,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:17,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-20 06:38:17,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:17,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 06:38:17,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:17,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:38:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:17,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-20 06:38:17,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:17,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:38:17,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:17,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-20 06:38:17,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:17,719 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-20 06:38:17,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:17,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938812749] [2021-11-20 06:38:17,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938812749] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:38:17,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842447864] [2021-11-20 06:38:17,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:17,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:17,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:17,723 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:17,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:38:18,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:18,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 2589 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:38:18,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-20 06:38:18,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:38:18,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842447864] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:38:18,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:38:18,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-11-20 06:38:18,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429266670] [2021-11-20 06:38:18,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:38:18,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:38:18,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:18,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:38:18,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:38:18,750 INFO L87 Difference]: Start difference. First operand 127 states and 173 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-20 06:38:18,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:18,967 INFO L93 Difference]: Finished difference Result 250 states and 347 transitions. [2021-11-20 06:38:18,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:38:18,969 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 95 [2021-11-20 06:38:18,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:18,974 INFO L225 Difference]: With dead ends: 250 [2021-11-20 06:38:18,975 INFO L226 Difference]: Without dead ends: 130 [2021-11-20 06:38:18,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:38:18,987 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 187 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:18,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 376 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:38:18,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-20 06:38:19,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-11-20 06:38:19,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 79 states have internal predecessors, (94), 41 states have call successors, (41), 10 states have call predecessors, (41), 11 states have return successors, (48), 40 states have call predecessors, (48), 40 states have call successors, (48) [2021-11-20 06:38:19,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 183 transitions. [2021-11-20 06:38:19,022 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 183 transitions. Word has length 95 [2021-11-20 06:38:19,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:19,023 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 183 transitions. [2021-11-20 06:38:19,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-20 06:38:19,023 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 183 transitions. [2021-11-20 06:38:19,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-20 06:38:19,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:19,026 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:19,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:19,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:19,254 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:19,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:19,254 INFO L85 PathProgramCache]: Analyzing trace with hash -513109833, now seen corresponding path program 1 times [2021-11-20 06:38:19,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:19,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783877130] [2021-11-20 06:38:19,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:19,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:19,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:19,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:38:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:19,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:38:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:19,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:38:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:19,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:38:19,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:19,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:38:19,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:19,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 06:38:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:19,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:38:19,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:19,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:38:19,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:19,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:38:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:19,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-20 06:38:19,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:19,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 06:38:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:19,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 06:38:19,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:19,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-20 06:38:19,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:19,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-20 06:38:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:19,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 06:38:19,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-20 06:38:19,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:19,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783877130] [2021-11-20 06:38:19,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783877130] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:38:19,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226675161] [2021-11-20 06:38:19,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:19,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:19,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:19,759 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:19,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:38:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:20,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 2594 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:38:20,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:20,604 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 06:38:20,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:38:20,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226675161] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:38:20,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:38:20,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2021-11-20 06:38:20,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651435071] [2021-11-20 06:38:20,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:38:20,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:38:20,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:20,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:38:20,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:38:20,607 INFO L87 Difference]: Start difference. First operand 130 states and 183 transitions. Second operand has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-20 06:38:20,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:20,973 INFO L93 Difference]: Finished difference Result 210 states and 301 transitions. [2021-11-20 06:38:20,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:38:20,973 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) Word has length 97 [2021-11-20 06:38:20,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:20,976 INFO L225 Difference]: With dead ends: 210 [2021-11-20 06:38:20,976 INFO L226 Difference]: Without dead ends: 130 [2021-11-20 06:38:20,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:38:20,979 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 204 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:20,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 669 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:38:20,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-20 06:38:20,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-11-20 06:38:20,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 79 states have internal predecessors, (94), 41 states have call successors, (41), 10 states have call predecessors, (41), 11 states have return successors, (45), 40 states have call predecessors, (45), 40 states have call successors, (45) [2021-11-20 06:38:20,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 180 transitions. [2021-11-20 06:38:20,999 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 180 transitions. Word has length 97 [2021-11-20 06:38:21,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:21,000 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 180 transitions. [2021-11-20 06:38:21,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 4 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-20 06:38:21,000 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 180 transitions. [2021-11-20 06:38:21,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-20 06:38:21,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:21,003 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:21,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-20 06:38:21,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:21,223 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:21,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:21,224 INFO L85 PathProgramCache]: Analyzing trace with hash -199598313, now seen corresponding path program 2 times [2021-11-20 06:38:21,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:21,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335935185] [2021-11-20 06:38:21,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:21,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:21,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:21,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:38:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:21,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:38:21,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:21,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:38:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:21,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:38:21,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:21,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:38:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:21,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 06:38:21,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:21,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:38:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:21,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:38:21,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:21,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:38:21,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:21,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-20 06:38:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:21,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-20 06:38:21,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:21,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 06:38:21,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:21,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-20 06:38:21,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:21,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 06:38:21,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:21,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-20 06:38:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-20 06:38:21,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:21,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335935185] [2021-11-20 06:38:21,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335935185] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:38:21,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937492064] [2021-11-20 06:38:21,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:38:21,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:21,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:21,727 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:21,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:38:22,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-20 06:38:22,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:38:22,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 2319 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 06:38:22,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:22,451 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-20 06:38:22,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:38:22,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937492064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:38:22,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:38:22,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2021-11-20 06:38:22,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437038945] [2021-11-20 06:38:22,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:38:22,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:38:22,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:22,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:38:22,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:38:22,454 INFO L87 Difference]: Start difference. First operand 130 states and 180 transitions. Second operand has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-20 06:38:22,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:22,538 INFO L93 Difference]: Finished difference Result 142 states and 201 transitions. [2021-11-20 06:38:22,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:38:22,539 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 101 [2021-11-20 06:38:22,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:22,541 INFO L225 Difference]: With dead ends: 142 [2021-11-20 06:38:22,542 INFO L226 Difference]: Without dead ends: 140 [2021-11-20 06:38:22,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:38:22,543 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 16 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:22,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 1215 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:38:22,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-20 06:38:22,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2021-11-20 06:38:22,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 83 states have (on average 1.2048192771084338) internal successors, (100), 86 states have internal predecessors, (100), 42 states have call successors, (42), 11 states have call predecessors, (42), 13 states have return successors, (56), 41 states have call predecessors, (56), 41 states have call successors, (56) [2021-11-20 06:38:22,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 198 transitions. [2021-11-20 06:38:22,562 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 198 transitions. Word has length 101 [2021-11-20 06:38:22,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:22,563 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 198 transitions. [2021-11-20 06:38:22,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-20 06:38:22,564 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 198 transitions. [2021-11-20 06:38:22,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-20 06:38:22,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:22,566 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:22,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:22,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:22,790 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:22,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:22,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1826692575, now seen corresponding path program 1 times [2021-11-20 06:38:22,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:22,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014394520] [2021-11-20 06:38:22,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:22,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:22,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:22,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:38:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:22,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:38:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:23,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:38:23,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:23,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:38:23,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:23,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:38:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:23,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 06:38:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:23,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:38:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:23,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:38:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:23,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:38:23,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:23,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-20 06:38:23,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:23,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-20 06:38:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:23,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 06:38:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:23,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-20 06:38:23,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:23,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 06:38:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:23,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-20 06:38:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:23,180 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-20 06:38:23,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:23,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014394520] [2021-11-20 06:38:23,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014394520] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:38:23,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446797606] [2021-11-20 06:38:23,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:23,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:23,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:23,186 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:23,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:38:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:23,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 2613 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:38:23,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:24,041 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 06:38:24,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:38:24,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446797606] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:38:24,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:38:24,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2021-11-20 06:38:24,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415654668] [2021-11-20 06:38:24,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:38:24,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:38:24,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:24,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:38:24,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:38:24,045 INFO L87 Difference]: Start difference. First operand 139 states and 198 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-20 06:38:24,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:24,367 INFO L93 Difference]: Finished difference Result 272 states and 404 transitions. [2021-11-20 06:38:24,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:38:24,368 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 101 [2021-11-20 06:38:24,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:24,373 INFO L225 Difference]: With dead ends: 272 [2021-11-20 06:38:24,373 INFO L226 Difference]: Without dead ends: 168 [2021-11-20 06:38:24,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:38:24,375 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 249 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:24,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 650 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:38:24,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-20 06:38:24,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-11-20 06:38:24,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 97 states have (on average 1.2268041237113403) internal successors, (119), 100 states have internal predecessors, (119), 56 states have call successors, (56), 12 states have call predecessors, (56), 14 states have return successors, (74), 55 states have call predecessors, (74), 55 states have call successors, (74) [2021-11-20 06:38:24,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 249 transitions. [2021-11-20 06:38:24,428 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 249 transitions. Word has length 101 [2021-11-20 06:38:24,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:24,429 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 249 transitions. [2021-11-20 06:38:24,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-20 06:38:24,429 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 249 transitions. [2021-11-20 06:38:24,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-20 06:38:24,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:24,432 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 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] [2021-11-20 06:38:24,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:24,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:24,658 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:24,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:24,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1515977756, now seen corresponding path program 1 times [2021-11-20 06:38:24,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:24,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087672684] [2021-11-20 06:38:24,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:24,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:24,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:24,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:38:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:24,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:38:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:24,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:38:24,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:24,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:38:24,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:24,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:38:25,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:25,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 06:38:25,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:25,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:38:25,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:25,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:38:25,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:25,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:38:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:25,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-20 06:38:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:25,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-20 06:38:25,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:25,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 06:38:25,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:25,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:38:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:25,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 06:38:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:25,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 06:38:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-20 06:38:25,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:25,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087672684] [2021-11-20 06:38:25,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087672684] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:38:25,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:38:25,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 06:38:25,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371309905] [2021-11-20 06:38:25,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:38:25,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:38:25,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:25,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:38:25,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:38:25,153 INFO L87 Difference]: Start difference. First operand 168 states and 249 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-20 06:38:26,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:26,073 INFO L93 Difference]: Finished difference Result 181 states and 264 transitions. [2021-11-20 06:38:26,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:38:26,074 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 103 [2021-11-20 06:38:26,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:26,077 INFO L225 Difference]: With dead ends: 181 [2021-11-20 06:38:26,077 INFO L226 Difference]: Without dead ends: 179 [2021-11-20 06:38:26,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:38:26,078 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 80 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:26,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 739 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 06:38:26,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-20 06:38:26,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 174. [2021-11-20 06:38:26,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 100 states have (on average 1.22) internal successors, (122), 103 states have internal predecessors, (122), 58 states have call successors, (58), 13 states have call predecessors, (58), 15 states have return successors, (76), 57 states have call predecessors, (76), 57 states have call successors, (76) [2021-11-20 06:38:26,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 256 transitions. [2021-11-20 06:38:26,100 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 256 transitions. Word has length 103 [2021-11-20 06:38:26,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:26,101 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 256 transitions. [2021-11-20 06:38:26,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-20 06:38:26,101 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 256 transitions. [2021-11-20 06:38:26,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-20 06:38:26,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:26,104 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:26,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:38:26,104 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:26,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:26,105 INFO L85 PathProgramCache]: Analyzing trace with hash 101250906, now seen corresponding path program 1 times [2021-11-20 06:38:26,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:26,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297993681] [2021-11-20 06:38:26,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:26,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:26,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:38:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:26,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:38:26,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:26,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:38:26,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:26,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:38:26,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:26,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:38:26,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:26,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 06:38:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:26,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:38:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:26,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:38:26,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:26,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:38:26,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:26,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-20 06:38:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:26,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-20 06:38:26,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:26,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 06:38:26,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:26,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:38:26,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:26,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 06:38:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:26,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 06:38:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:26,754 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 06:38:26,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:26,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297993681] [2021-11-20 06:38:26,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297993681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:38:26,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672167022] [2021-11-20 06:38:26,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:26,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:26,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:26,756 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:26,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:38:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:27,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 2621 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-20 06:38:27,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:27,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:38:27,732 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 06:38:27,733 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 1 case distinctions, treesize of input 46 treesize of output 26 [2021-11-20 06:38:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 36 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-20 06:38:29,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:38:32,491 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#rhs~0#1.base| Int) (v_DerPreprocessor_1 Int)) (let ((.cse0 (select (select (store |c_#memory_int| |ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#rhs~0#1.base| (store (store (select |c_#memory_int| |ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#rhs~0#1.base|) |c_ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#rhs~0#1.offset| (select (select |c_#memory_int| |c_ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#lhs~0#1.base|) |c_ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#lhs~0#1.offset|)) (+ |c_ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#rhs~0#1.offset| 8) v_DerPreprocessor_1)) |c_ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#lhs~0#1.base|) |c_ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#lhs~0#1.offset|))) (<= .cse0 (* 18446744073709551616 (div .cse0 18446744073709551616))))) is different from false [2021-11-20 06:38:32,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672167022] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:38:32,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:38:32,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 24 [2021-11-20 06:38:32,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049203379] [2021-11-20 06:38:32,524 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:38:32,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 06:38:32,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:32,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 06:38:32,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=706, Unknown=1, NotChecked=54, Total=870 [2021-11-20 06:38:32,527 INFO L87 Difference]: Start difference. First operand 174 states and 256 transitions. Second operand has 24 states, 23 states have (on average 3.9130434782608696) internal successors, (90), 21 states have internal predecessors, (90), 9 states have call successors, (32), 7 states have call predecessors, (32), 6 states have return successors, (29), 8 states have call predecessors, (29), 7 states have call successors, (29) [2021-11-20 06:38:37,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:37,050 INFO L93 Difference]: Finished difference Result 487 states and 748 transitions. [2021-11-20 06:38:37,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-20 06:38:37,053 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.9130434782608696) internal successors, (90), 21 states have internal predecessors, (90), 9 states have call successors, (32), 7 states have call predecessors, (32), 6 states have return successors, (29), 8 states have call predecessors, (29), 7 states have call successors, (29) Word has length 107 [2021-11-20 06:38:37,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:37,057 INFO L225 Difference]: With dead ends: 487 [2021-11-20 06:38:37,057 INFO L226 Difference]: Without dead ends: 366 [2021-11-20 06:38:37,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 179 SyntacticMatches, 25 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=382, Invalid=1973, Unknown=1, NotChecked=94, Total=2450 [2021-11-20 06:38:37,060 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 273 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 1709 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 2357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 484 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:37,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 723 Invalid, 2357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1709 Invalid, 0 Unknown, 484 Unchecked, 2.2s Time] [2021-11-20 06:38:37,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-11-20 06:38:37,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 302. [2021-11-20 06:38:37,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 180 states have (on average 1.2222222222222223) internal successors, (220), 186 states have internal predecessors, (220), 97 states have call successors, (97), 21 states have call predecessors, (97), 24 states have return successors, (134), 94 states have call predecessors, (134), 96 states have call successors, (134) [2021-11-20 06:38:37,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 451 transitions. [2021-11-20 06:38:37,115 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 451 transitions. Word has length 107 [2021-11-20 06:38:37,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:37,116 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 451 transitions. [2021-11-20 06:38:37,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.9130434782608696) internal successors, (90), 21 states have internal predecessors, (90), 9 states have call successors, (32), 7 states have call predecessors, (32), 6 states have return successors, (29), 8 states have call predecessors, (29), 7 states have call successors, (29) [2021-11-20 06:38:37,117 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 451 transitions. [2021-11-20 06:38:37,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-20 06:38:37,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:37,122 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:37,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:37,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 06:38:37,334 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:37,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:37,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1705417372, now seen corresponding path program 1 times [2021-11-20 06:38:37,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:37,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122140697] [2021-11-20 06:38:37,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:37,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:37,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:38:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:37,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:38:37,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:37,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:38:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:37,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:38:37,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:37,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:38:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:37,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 06:38:37,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:37,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:38:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:37,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:38:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:37,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:38:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:37,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-20 06:38:37,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:37,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-20 06:38:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:37,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 06:38:37,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:37,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:38:37,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:37,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 06:38:37,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:37,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 06:38:37,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:37,803 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-20 06:38:37,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:37,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122140697] [2021-11-20 06:38:37,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122140697] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:38:37,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436758548] [2021-11-20 06:38:37,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:37,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:37,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:37,806 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:37,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:38:38,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:38,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 2630 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-20 06:38:38,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:38,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:38:38,736 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 06:38:38,737 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 1 case distinctions, treesize of input 46 treesize of output 26 [2021-11-20 06:38:39,826 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:38:39,827 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 76 treesize of output 44 [2021-11-20 06:38:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 42 proven. 12 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-20 06:38:39,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:38:40,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436758548] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:38:40,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:38:40,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 19 [2021-11-20 06:38:40,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617325341] [2021-11-20 06:38:40,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:38:40,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 06:38:40,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:40,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 06:38:40,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:38:40,996 INFO L87 Difference]: Start difference. First operand 302 states and 451 transitions. Second operand has 19 states, 18 states have (on average 4.777777777777778) internal successors, (86), 16 states have internal predecessors, (86), 8 states have call successors, (32), 7 states have call predecessors, (32), 5 states have return successors, (29), 7 states have call predecessors, (29), 8 states have call successors, (29) [2021-11-20 06:38:42,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:42,968 INFO L93 Difference]: Finished difference Result 638 states and 963 transitions. [2021-11-20 06:38:42,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-20 06:38:42,969 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.777777777777778) internal successors, (86), 16 states have internal predecessors, (86), 8 states have call successors, (32), 7 states have call predecessors, (32), 5 states have return successors, (29), 7 states have call predecessors, (29), 8 states have call successors, (29) Word has length 107 [2021-11-20 06:38:42,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:42,973 INFO L225 Difference]: With dead ends: 638 [2021-11-20 06:38:42,973 INFO L226 Difference]: Without dead ends: 426 [2021-11-20 06:38:42,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 178 SyntacticMatches, 15 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=260, Invalid=1720, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 06:38:42,976 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 189 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 531 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:42,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 794 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 789 Invalid, 0 Unknown, 531 Unchecked, 1.0s Time] [2021-11-20 06:38:42,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-11-20 06:38:43,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 389. [2021-11-20 06:38:43,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 237 states have (on average 1.1898734177215189) internal successors, (282), 242 states have internal predecessors, (282), 121 states have call successors, (121), 25 states have call predecessors, (121), 30 states have return successors, (168), 121 states have call predecessors, (168), 120 states have call successors, (168) [2021-11-20 06:38:43,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 571 transitions. [2021-11-20 06:38:43,026 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 571 transitions. Word has length 107 [2021-11-20 06:38:43,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:43,026 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 571 transitions. [2021-11-20 06:38:43,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.777777777777778) internal successors, (86), 16 states have internal predecessors, (86), 8 states have call successors, (32), 7 states have call predecessors, (32), 5 states have return successors, (29), 7 states have call predecessors, (29), 8 states have call successors, (29) [2021-11-20 06:38:43,027 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 571 transitions. [2021-11-20 06:38:43,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-20 06:38:43,029 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:43,030 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:43,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:43,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:43,258 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:43,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:43,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1355654111, now seen corresponding path program 1 times [2021-11-20 06:38:43,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:43,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562553175] [2021-11-20 06:38:43,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:43,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:43,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:43,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:38:43,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:43,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:38:43,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:43,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:38:43,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:43,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:38:43,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:43,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:38:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:43,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 06:38:43,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:43,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:38:43,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:43,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:38:43,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:43,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:38:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:43,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-20 06:38:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:43,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-20 06:38:43,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:43,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 06:38:43,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:43,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:38:43,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:43,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 06:38:43,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:43,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 06:38:43,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:43,709 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-20 06:38:43,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:43,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562553175] [2021-11-20 06:38:43,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562553175] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:38:43,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:38:43,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-20 06:38:43,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355699906] [2021-11-20 06:38:43,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:38:43,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:38:43,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:43,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:38:43,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:38:43,712 INFO L87 Difference]: Start difference. First operand 389 states and 571 transitions. Second operand has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 8 states have internal predecessors, (46), 2 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-20 06:38:44,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:44,643 INFO L93 Difference]: Finished difference Result 418 states and 628 transitions. [2021-11-20 06:38:44,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:38:44,643 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 8 states have internal predecessors, (46), 2 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 109 [2021-11-20 06:38:44,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:44,652 INFO L225 Difference]: With dead ends: 418 [2021-11-20 06:38:44,652 INFO L226 Difference]: Without dead ends: 416 [2021-11-20 06:38:44,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:38:44,656 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 87 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:44,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 923 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 06:38:44,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-11-20 06:38:44,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 407. [2021-11-20 06:38:44,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 250 states have (on average 1.18) internal successors, (295), 257 states have internal predecessors, (295), 123 states have call successors, (123), 26 states have call predecessors, (123), 33 states have return successors, (199), 123 states have call predecessors, (199), 122 states have call successors, (199) [2021-11-20 06:38:44,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 617 transitions. [2021-11-20 06:38:44,711 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 617 transitions. Word has length 109 [2021-11-20 06:38:44,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:44,711 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 617 transitions. [2021-11-20 06:38:44,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 8 states have internal predecessors, (46), 2 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-20 06:38:44,712 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 617 transitions. [2021-11-20 06:38:44,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-20 06:38:44,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:44,715 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:44,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 06:38:44,715 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:44,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:44,716 INFO L85 PathProgramCache]: Analyzing trace with hash 2056718689, now seen corresponding path program 1 times [2021-11-20 06:38:44,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:44,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951369374] [2021-11-20 06:38:44,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:44,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:44,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:38:44,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:44,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:38:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:44,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:38:44,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:44,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:38:44,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:44,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:38:44,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:44,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 06:38:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:44,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:38:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:45,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:38:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:45,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:38:45,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:45,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-20 06:38:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:45,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-20 06:38:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:45,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 06:38:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:45,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:38:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:45,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 06:38:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:45,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 06:38:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:45,212 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-20 06:38:45,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:45,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951369374] [2021-11-20 06:38:45,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951369374] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:38:45,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:38:45,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-20 06:38:45,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683445729] [2021-11-20 06:38:45,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:38:45,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 06:38:45,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:45,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 06:38:45,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:38:45,215 INFO L87 Difference]: Start difference. First operand 407 states and 617 transitions. Second operand has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-20 06:38:46,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:46,613 INFO L93 Difference]: Finished difference Result 423 states and 657 transitions. [2021-11-20 06:38:46,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:38:46,613 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 109 [2021-11-20 06:38:46,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:46,618 INFO L225 Difference]: With dead ends: 423 [2021-11-20 06:38:46,618 INFO L226 Difference]: Without dead ends: 421 [2021-11-20 06:38:46,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:38:46,620 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 104 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:46,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 1057 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1126 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 06:38:46,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-11-20 06:38:46,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 400. [2021-11-20 06:38:46,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 244 states have (on average 1.1844262295081966) internal successors, (289), 250 states have internal predecessors, (289), 123 states have call successors, (123), 26 states have call predecessors, (123), 32 states have return successors, (194), 123 states have call predecessors, (194), 122 states have call successors, (194) [2021-11-20 06:38:46,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 606 transitions. [2021-11-20 06:38:46,667 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 606 transitions. Word has length 109 [2021-11-20 06:38:46,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:46,667 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 606 transitions. [2021-11-20 06:38:46,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-20 06:38:46,668 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 606 transitions. [2021-11-20 06:38:46,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-20 06:38:46,671 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:46,671 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 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] [2021-11-20 06:38:46,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 06:38:46,672 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:46,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:46,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1582523535, now seen corresponding path program 1 times [2021-11-20 06:38:46,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:46,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920869669] [2021-11-20 06:38:46,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:46,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:46,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:38:46,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:46,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:38:46,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:47,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:38:47,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:47,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:38:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:47,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:38:47,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:47,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 06:38:47,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:47,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:38:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:47,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:38:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:47,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:38:47,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:47,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:38:47,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:47,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 06:38:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:47,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-20 06:38:47,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:47,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-20 06:38:47,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:47,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-20 06:38:47,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:47,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-20 06:38:47,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:47,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-20 06:38:47,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:47,334 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-20 06:38:47,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:47,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920869669] [2021-11-20 06:38:47,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920869669] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:38:47,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630351017] [2021-11-20 06:38:47,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:47,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:47,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:47,338 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:47,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:38:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:47,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 2663 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 06:38:47,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:48,154 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 06:38:48,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:38:48,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630351017] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:38:48,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:38:48,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [14] total 21 [2021-11-20 06:38:48,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614488131] [2021-11-20 06:38:48,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:38:48,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:38:48,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:48,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:38:48,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:38:48,157 INFO L87 Difference]: Start difference. First operand 400 states and 606 transitions. Second operand has 9 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 06:38:48,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:48,348 INFO L93 Difference]: Finished difference Result 642 states and 984 transitions. [2021-11-20 06:38:48,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:38:48,349 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 118 [2021-11-20 06:38:48,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:48,353 INFO L225 Difference]: With dead ends: 642 [2021-11-20 06:38:48,354 INFO L226 Difference]: Without dead ends: 370 [2021-11-20 06:38:48,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:38:48,357 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 12 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:48,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1330 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:38:48,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-11-20 06:38:48,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 367. [2021-11-20 06:38:48,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 226 states have (on average 1.1858407079646018) internal successors, (268), 233 states have internal predecessors, (268), 110 states have call successors, (110), 26 states have call predecessors, (110), 30 states have return successors, (168), 107 states have call predecessors, (168), 109 states have call successors, (168) [2021-11-20 06:38:48,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 546 transitions. [2021-11-20 06:38:48,404 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 546 transitions. Word has length 118 [2021-11-20 06:38:48,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:48,406 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 546 transitions. [2021-11-20 06:38:48,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 06:38:48,407 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 546 transitions. [2021-11-20 06:38:48,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-20 06:38:48,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:48,410 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 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] [2021-11-20 06:38:48,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:48,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:48,626 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:48,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:48,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1757380781, now seen corresponding path program 1 times [2021-11-20 06:38:48,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:48,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19705768] [2021-11-20 06:38:48,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:48,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:48,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:48,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:38:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:48,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:38:48,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:48,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:38:48,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:48,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:38:48,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:48,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:38:48,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:48,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 06:38:48,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:48,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:38:48,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:48,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:38:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:48,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:38:48,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:48,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-20 06:38:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:48,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 06:38:48,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:48,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-20 06:38:49,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:49,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 06:38:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:49,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-20 06:38:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:49,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-20 06:38:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:49,043 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-20 06:38:49,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:49,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19705768] [2021-11-20 06:38:49,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19705768] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:38:49,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554876449] [2021-11-20 06:38:49,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:49,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:49,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:49,046 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:49,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:38:49,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:49,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 2638 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:38:49,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-20 06:38:49,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:38:49,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554876449] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:38:49,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:38:49,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2021-11-20 06:38:49,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602861086] [2021-11-20 06:38:49,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:38:49,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:38:49,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:49,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:38:49,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:38:49,930 INFO L87 Difference]: Start difference. First operand 367 states and 546 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:38:50,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:50,217 INFO L93 Difference]: Finished difference Result 669 states and 1032 transitions. [2021-11-20 06:38:50,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:38:50,218 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2021-11-20 06:38:50,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:50,222 INFO L225 Difference]: With dead ends: 669 [2021-11-20 06:38:50,223 INFO L226 Difference]: Without dead ends: 370 [2021-11-20 06:38:50,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:38:50,226 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 17 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:50,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 619 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2021-11-20 06:38:50,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-11-20 06:38:50,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 367. [2021-11-20 06:38:50,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 226 states have (on average 1.1725663716814159) internal successors, (265), 233 states have internal predecessors, (265), 110 states have call successors, (110), 26 states have call predecessors, (110), 30 states have return successors, (168), 107 states have call predecessors, (168), 109 states have call successors, (168) [2021-11-20 06:38:50,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 543 transitions. [2021-11-20 06:38:50,265 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 543 transitions. Word has length 113 [2021-11-20 06:38:50,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:50,265 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 543 transitions. [2021-11-20 06:38:50,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:38:50,266 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 543 transitions. [2021-11-20 06:38:50,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-20 06:38:50,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:50,269 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 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 06:38:50,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:50,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:50,494 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:50,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:50,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1375218206, now seen corresponding path program 1 times [2021-11-20 06:38:50,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:50,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286776119] [2021-11-20 06:38:50,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:50,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:50,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:50,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:38:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:50,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:38:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:50,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:38:50,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:50,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:38:50,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:50,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:38:50,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:50,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 06:38:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:50,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:38:50,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:50,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:38:50,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:50,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:38:50,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:51,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:38:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:51,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 06:38:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:51,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 06:38:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:51,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-20 06:38:51,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:51,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 06:38:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:51,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-20 06:38:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:51,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-20 06:38:51,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:51,422 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-20 06:38:51,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:51,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286776119] [2021-11-20 06:38:51,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286776119] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:38:51,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524344311] [2021-11-20 06:38:51,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:51,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:51,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:51,426 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:51,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:38:51,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:51,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 2664 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-20 06:38:51,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:52,474 INFO L354 Elim1Store]: treesize reduction 82, result has 23.4 percent of original size [2021-11-20 06:38:52,475 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 2 case distinctions, treesize of input 42 treesize of output 32 [2021-11-20 06:38:52,664 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 06:38:52,664 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 40 treesize of output 20 [2021-11-20 06:38:52,926 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 8 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-20 06:38:52,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:38:53,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524344311] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:38:53,616 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:38:53,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 27 [2021-11-20 06:38:53,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967333689] [2021-11-20 06:38:53,616 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:38:53,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 06:38:53,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:53,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 06:38:53,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-11-20 06:38:53,619 INFO L87 Difference]: Start difference. First operand 367 states and 543 transitions. Second operand has 27 states, 24 states have (on average 4.166666666666667) internal successors, (100), 23 states have internal predecessors, (100), 13 states have call successors, (35), 7 states have call predecessors, (35), 8 states have return successors, (32), 11 states have call predecessors, (32), 12 states have call successors, (32) [2021-11-20 06:38:57,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:57,139 INFO L93 Difference]: Finished difference Result 669 states and 1062 transitions. [2021-11-20 06:38:57,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-20 06:38:57,140 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 4.166666666666667) internal successors, (100), 23 states have internal predecessors, (100), 13 states have call successors, (35), 7 states have call predecessors, (35), 8 states have return successors, (32), 11 states have call predecessors, (32), 12 states have call successors, (32) Word has length 120 [2021-11-20 06:38:57,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:57,145 INFO L225 Difference]: With dead ends: 669 [2021-11-20 06:38:57,145 INFO L226 Difference]: Without dead ends: 481 [2021-11-20 06:38:57,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 219 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=255, Invalid=2001, Unknown=0, NotChecked=0, Total=2256 [2021-11-20 06:38:57,149 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 232 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 2604 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 3291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 2604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 457 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:57,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 1195 Invalid, 3291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 2604 Invalid, 0 Unknown, 457 Unchecked, 2.6s Time] [2021-11-20 06:38:57,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-11-20 06:38:57,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 465. [2021-11-20 06:38:57,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 273 states have (on average 1.1868131868131868) internal successors, (324), 281 states have internal predecessors, (324), 158 states have call successors, (158), 28 states have call predecessors, (158), 33 states have return successors, (239), 155 states have call predecessors, (239), 157 states have call successors, (239) [2021-11-20 06:38:57,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 721 transitions. [2021-11-20 06:38:57,207 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 721 transitions. Word has length 120 [2021-11-20 06:38:57,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:57,208 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 721 transitions. [2021-11-20 06:38:57,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 4.166666666666667) internal successors, (100), 23 states have internal predecessors, (100), 13 states have call successors, (35), 7 states have call predecessors, (35), 8 states have return successors, (32), 11 states have call predecessors, (32), 12 states have call successors, (32) [2021-11-20 06:38:57,208 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 721 transitions. [2021-11-20 06:38:57,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-20 06:38:57,211 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:57,212 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:57,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:57,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:57,427 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:57,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:57,427 INFO L85 PathProgramCache]: Analyzing trace with hash 622395683, now seen corresponding path program 1 times [2021-11-20 06:38:57,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:57,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873889975] [2021-11-20 06:38:57,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:57,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:57,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:38:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:57,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:38:57,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:57,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:38:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:57,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:38:57,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:57,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:38:57,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:57,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:38:57,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:57,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-20 06:38:57,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:57,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-20 06:38:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:57,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 06:38:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:57,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 06:38:57,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:57,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-20 06:38:57,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:57,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-20 06:38:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:57,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 06:38:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:57,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 06:38:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:57,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-20 06:38:57,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-20 06:38:57,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:57,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873889975] [2021-11-20 06:38:57,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873889975] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:38:57,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386683072] [2021-11-20 06:38:57,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:57,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:57,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:57,879 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:57,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:38:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:58,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 2655 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 06:38:58,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:58,620 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-20 06:38:58,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:38:58,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386683072] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:38:58,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:38:58,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 12 [2021-11-20 06:38:58,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234780902] [2021-11-20 06:38:58,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:38:58,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:38:58,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:58,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:38:58,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:38:58,623 INFO L87 Difference]: Start difference. First operand 465 states and 721 transitions. Second operand has 9 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-20 06:38:58,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:58,830 INFO L93 Difference]: Finished difference Result 784 states and 1247 transitions. [2021-11-20 06:38:58,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:38:58,831 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 117 [2021-11-20 06:38:58,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:58,836 INFO L225 Difference]: With dead ends: 784 [2021-11-20 06:38:58,836 INFO L226 Difference]: Without dead ends: 466 [2021-11-20 06:38:58,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:38:58,840 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 11 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:58,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1314 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:38:58,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-11-20 06:38:58,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 465. [2021-11-20 06:38:58,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 273 states have (on average 1.1868131868131868) internal successors, (324), 281 states have internal predecessors, (324), 158 states have call successors, (158), 28 states have call predecessors, (158), 33 states have return successors, (237), 155 states have call predecessors, (237), 157 states have call successors, (237) [2021-11-20 06:38:58,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 719 transitions. [2021-11-20 06:38:58,897 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 719 transitions. Word has length 117 [2021-11-20 06:38:58,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:58,898 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 719 transitions. [2021-11-20 06:38:58,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-20 06:38:58,898 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 719 transitions. [2021-11-20 06:38:58,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-20 06:38:58,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:58,905 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 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] [2021-11-20 06:38:58,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:59,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 06:38:59,134 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:59,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:59,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1276300523, now seen corresponding path program 2 times [2021-11-20 06:38:59,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:59,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284396212] [2021-11-20 06:38:59,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:59,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:59,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:59,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:38:59,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:59,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:38:59,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:59,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:38:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:59,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:38:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:59,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:38:59,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:59,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 06:38:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:59,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:38:59,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:59,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:38:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:59,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:38:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:59,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-20 06:38:59,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:59,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 06:38:59,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:00,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-20 06:39:00,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:00,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 06:39:00,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:00,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-20 06:39:00,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:00,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-20 06:39:00,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:00,049 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 06:39:00,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:39:00,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284396212] [2021-11-20 06:39:00,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284396212] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:39:00,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500627181] [2021-11-20 06:39:00,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:39:00,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:39:00,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:39:00,054 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:39:00,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 06:39:01,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:39:01,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:39:01,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 2643 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-20 06:39:01,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:01,346 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 10 treesize of output 8 [2021-11-20 06:39:01,936 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-20 06:39:01,936 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 1 case distinctions, treesize of input 46 treesize of output 26 [2021-11-20 06:39:11,721 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 52 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 06:39:11,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:39:14,069 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#rhs~0#1.offset| Int) (v_DerPreprocessor_4 Int)) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#rhs~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#rhs~0#1.base|) |ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#rhs~0#1.offset| (select (select |c_#memory_int| |c_ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#lhs~0#1.base|) |c_ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#lhs~0#1.offset|)) (+ |ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#rhs~0#1.offset| 8) v_DerPreprocessor_4)) |c_ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#lhs~0#1.base|) |c_ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#lhs~0#1.offset|))) (<= .cse0 (* 18446744073709551616 (div .cse0 18446744073709551616))))) is different from false [2021-11-20 06:39:14,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500627181] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:39:14,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:39:14,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-11-20 06:39:14,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227410726] [2021-11-20 06:39:14,078 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:39:14,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-20 06:39:14,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:39:14,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-20 06:39:14,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1106, Unknown=2, NotChecked=68, Total=1332 [2021-11-20 06:39:14,081 INFO L87 Difference]: Start difference. First operand 465 states and 719 transitions. Second operand has 33 states, 28 states have (on average 3.75) internal successors, (105), 29 states have internal predecessors, (105), 14 states have call successors, (32), 9 states have call predecessors, (32), 7 states have return successors, (29), 11 states have call predecessors, (29), 12 states have call successors, (29) [2021-11-20 06:39:18,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:18,132 INFO L93 Difference]: Finished difference Result 810 states and 1217 transitions. [2021-11-20 06:39:18,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 06:39:18,133 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 28 states have (on average 3.75) internal successors, (105), 29 states have internal predecessors, (105), 14 states have call successors, (32), 9 states have call predecessors, (32), 7 states have return successors, (29), 11 states have call predecessors, (29), 12 states have call successors, (29) Word has length 113 [2021-11-20 06:39:18,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:18,138 INFO L225 Difference]: With dead ends: 810 [2021-11-20 06:39:18,138 INFO L226 Difference]: Without dead ends: 561 [2021-11-20 06:39:18,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 194 SyntacticMatches, 19 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=263, Invalid=1808, Unknown=3, NotChecked=88, Total=2162 [2021-11-20 06:39:18,141 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 358 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 1908 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 2926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 1908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 683 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:18,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 1213 Invalid, 2926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 1908 Invalid, 0 Unknown, 683 Unchecked, 1.8s Time] [2021-11-20 06:39:18,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-20 06:39:18,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 508. [2021-11-20 06:39:18,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 302 states have (on average 1.1721854304635762) internal successors, (354), 309 states have internal predecessors, (354), 167 states have call successors, (167), 32 states have call predecessors, (167), 38 states have return successors, (249), 166 states have call predecessors, (249), 166 states have call successors, (249) [2021-11-20 06:39:18,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 770 transitions. [2021-11-20 06:39:18,196 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 770 transitions. Word has length 113 [2021-11-20 06:39:18,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:18,197 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 770 transitions. [2021-11-20 06:39:18,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 28 states have (on average 3.75) internal successors, (105), 29 states have internal predecessors, (105), 14 states have call successors, (32), 9 states have call predecessors, (32), 7 states have return successors, (29), 11 states have call predecessors, (29), 12 states have call successors, (29) [2021-11-20 06:39:18,198 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 770 transitions. [2021-11-20 06:39:18,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-20 06:39:18,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:18,201 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-11-20 06:39:18,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-20 06:39:18,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 06:39:18,416 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:18,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:18,416 INFO L85 PathProgramCache]: Analyzing trace with hash 961140430, now seen corresponding path program 1 times [2021-11-20 06:39:18,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:39:18,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071509173] [2021-11-20 06:39:18,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:18,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:39:18,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:18,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:39:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:18,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:39:18,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:18,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:39:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:18,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:39:18,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:18,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:39:18,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:18,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 06:39:18,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:18,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:39:18,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:18,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:39:18,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:18,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:39:18,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:18,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-20 06:39:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:18,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-20 06:39:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:18,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 06:39:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:18,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:39:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:18,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 06:39:18,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:18,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 06:39:18,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:18,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-20 06:39:18,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:18,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-20 06:39:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:18,798 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-20 06:39:18,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:39:18,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071509173] [2021-11-20 06:39:18,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071509173] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:39:18,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:39:18,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 06:39:18,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680109028] [2021-11-20 06:39:18,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:39:18,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:39:18,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:39:18,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:39:18,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:39:18,802 INFO L87 Difference]: Start difference. First operand 508 states and 770 transitions. Second operand has 10 states, 9 states have (on average 4.888888888888889) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-20 06:39:19,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:19,522 INFO L93 Difference]: Finished difference Result 526 states and 793 transitions. [2021-11-20 06:39:19,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:39:19,523 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.888888888888889) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) Word has length 117 [2021-11-20 06:39:19,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:19,528 INFO L225 Difference]: With dead ends: 526 [2021-11-20 06:39:19,528 INFO L226 Difference]: Without dead ends: 524 [2021-11-20 06:39:19,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:39:19,530 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 139 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:19,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 712 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:39:19,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-11-20 06:39:19,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 518. [2021-11-20 06:39:19,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 305 states have (on average 1.1704918032786886) internal successors, (357), 312 states have internal predecessors, (357), 173 states have call successors, (173), 33 states have call predecessors, (173), 39 states have return successors, (255), 172 states have call predecessors, (255), 172 states have call successors, (255) [2021-11-20 06:39:19,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 785 transitions. [2021-11-20 06:39:19,583 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 785 transitions. Word has length 117 [2021-11-20 06:39:19,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:19,583 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 785 transitions. [2021-11-20 06:39:19,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.888888888888889) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-20 06:39:19,584 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 785 transitions. [2021-11-20 06:39:19,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-20 06:39:19,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:19,587 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 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 06:39:19,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 06:39:19,587 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:19,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:19,588 INFO L85 PathProgramCache]: Analyzing trace with hash -440949530, now seen corresponding path program 2 times [2021-11-20 06:39:19,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:39:19,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637296427] [2021-11-20 06:39:19,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:19,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:39:19,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:19,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:39:19,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:19,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:39:19,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:19,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:39:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:20,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:39:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:20,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:39:20,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:20,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 06:39:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:20,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:39:20,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:20,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:39:20,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:20,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:39:20,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:20,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 06:39:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:20,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 06:39:20,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:20,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 06:39:20,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:20,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-20 06:39:20,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:20,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 06:39:20,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:20,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-20 06:39:20,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:20,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-20 06:39:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:20,715 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-20 06:39:20,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:39:20,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637296427] [2021-11-20 06:39:20,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637296427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:39:20,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381956671] [2021-11-20 06:39:20,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:39:20,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:39:20,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:39:20,722 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:39:20,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 06:39:21,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:39:21,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:39:21,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 2664 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-20 06:39:21,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:21,939 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 10 treesize of output 8 [2021-11-20 06:39:22,068 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 06:39:22,074 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 06:39:22,553 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-20 06:39:22,554 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 91 treesize of output 73 [2021-11-20 06:39:22,571 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-20 06:39:22,572 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 76 treesize of output 58 [2021-11-20 06:39:22,588 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-20 06:39:22,588 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 61 treesize of output 54 [2021-11-20 06:39:22,603 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-20 06:39:22,604 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 51 treesize of output 44 [2021-11-20 06:39:22,705 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-20 06:39:22,706 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 55 treesize of output 37 [2021-11-20 06:39:22,711 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-20 06:39:22,711 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 17 [2021-11-20 06:39:22,987 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 68 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-20 06:39:22,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:39:48,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381956671] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:39:48,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:39:48,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 27 [2021-11-20 06:39:48,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078072937] [2021-11-20 06:39:48,186 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:39:48,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 06:39:48,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:39:48,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 06:39:48,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=778, Unknown=4, NotChecked=0, Total=870 [2021-11-20 06:39:48,188 INFO L87 Difference]: Start difference. First operand 518 states and 785 transitions. Second operand has 27 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 11 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (32), 9 states have call predecessors, (32), 11 states have call successors, (32) [2021-11-20 06:39:51,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:51,551 INFO L93 Difference]: Finished difference Result 898 states and 1405 transitions. [2021-11-20 06:39:51,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 06:39:51,552 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 11 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (32), 9 states have call predecessors, (32), 11 states have call successors, (32) Word has length 120 [2021-11-20 06:39:51,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:51,558 INFO L225 Difference]: With dead ends: 898 [2021-11-20 06:39:51,558 INFO L226 Difference]: Without dead ends: 606 [2021-11-20 06:39:51,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 217 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=286, Invalid=2260, Unknown=4, NotChecked=0, Total=2550 [2021-11-20 06:39:51,563 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 296 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 2397 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 3109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 2397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 346 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:51,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 998 Invalid, 3109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 2397 Invalid, 0 Unknown, 346 Unchecked, 2.4s Time] [2021-11-20 06:39:51,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-11-20 06:39:51,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 540. [2021-11-20 06:39:51,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 322 states have (on average 1.1677018633540373) internal successors, (376), 328 states have internal predecessors, (376), 175 states have call successors, (175), 38 states have call predecessors, (175), 42 states have return successors, (257), 173 states have call predecessors, (257), 174 states have call successors, (257) [2021-11-20 06:39:51,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 808 transitions. [2021-11-20 06:39:51,642 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 808 transitions. Word has length 120 [2021-11-20 06:39:51,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:51,643 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 808 transitions. [2021-11-20 06:39:51,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 11 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (32), 9 states have call predecessors, (32), 11 states have call successors, (32) [2021-11-20 06:39:51,643 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 808 transitions. [2021-11-20 06:39:51,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-20 06:39:51,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:51,647 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2021-11-20 06:39:51,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:39:51,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 06:39:51,874 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:51,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:51,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1937889046, now seen corresponding path program 1 times [2021-11-20 06:39:51,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:39:51,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787446066] [2021-11-20 06:39:51,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:51,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:39:52,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:52,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:39:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:52,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:39:52,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:52,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:39:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:52,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:39:52,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:52,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:39:52,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:52,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 06:39:52,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:52,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:39:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:52,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:39:52,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:52,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:39:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:52,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-20 06:39:52,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:52,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-20 06:39:52,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:52,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 06:39:52,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:52,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:39:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:52,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 06:39:52,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:52,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 06:39:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:52,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-20 06:39:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:52,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-20 06:39:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:52,686 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-20 06:39:52,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:39:52,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787446066] [2021-11-20 06:39:52,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787446066] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:39:52,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392597100] [2021-11-20 06:39:52,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:52,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:39:52,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:39:52,688 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:39:52,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 06:39:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:53,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 2653 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-20 06:39:53,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:53,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:39:53,537 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 06:39:53,538 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 1 case distinctions, treesize of input 46 treesize of output 26 [2021-11-20 06:39:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 45 proven. 22 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-20 06:39:54,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:39:55,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-11-20 06:39:55,558 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-20 06:39:55,558 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 30 treesize of output 25 [2021-11-20 06:39:55,616 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 20 proven. 24 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-20 06:39:55,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392597100] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:39:55,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:39:55,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 13] total 32 [2021-11-20 06:39:55,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482864447] [2021-11-20 06:39:55,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:39:55,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 06:39:55,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:39:55,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 06:39:55,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2021-11-20 06:39:55,620 INFO L87 Difference]: Start difference. First operand 540 states and 808 transitions. Second operand has 32 states, 30 states have (on average 3.566666666666667) internal successors, (107), 28 states have internal predecessors, (107), 11 states have call successors, (39), 9 states have call predecessors, (39), 8 states have return successors, (35), 9 states have call predecessors, (35), 10 states have call successors, (35) [2021-11-20 06:39:59,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:59,337 INFO L93 Difference]: Finished difference Result 1050 states and 1646 transitions. [2021-11-20 06:39:59,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 06:39:59,337 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 3.566666666666667) internal successors, (107), 28 states have internal predecessors, (107), 11 states have call successors, (39), 9 states have call predecessors, (39), 8 states have return successors, (35), 9 states have call predecessors, (35), 10 states have call successors, (35) Word has length 121 [2021-11-20 06:39:59,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:59,344 INFO L225 Difference]: With dead ends: 1050 [2021-11-20 06:39:59,345 INFO L226 Difference]: Without dead ends: 794 [2021-11-20 06:39:59,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 243 SyntacticMatches, 31 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=447, Invalid=2633, Unknown=0, NotChecked=0, Total=3080 [2021-11-20 06:39:59,349 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 423 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 3016 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 4067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 3016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 722 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:59,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [476 Valid, 864 Invalid, 4067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 3016 Invalid, 0 Unknown, 722 Unchecked, 2.5s Time] [2021-11-20 06:39:59,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-11-20 06:39:59,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 718. [2021-11-20 06:39:59,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 418 states have (on average 1.1722488038277512) internal successors, (490), 427 states have internal predecessors, (490), 250 states have call successors, (250), 45 states have call predecessors, (250), 49 states have return successors, (356), 245 states have call predecessors, (356), 249 states have call successors, (356) [2021-11-20 06:39:59,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1096 transitions. [2021-11-20 06:39:59,429 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1096 transitions. Word has length 121 [2021-11-20 06:39:59,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:59,430 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 1096 transitions. [2021-11-20 06:39:59,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 3.566666666666667) internal successors, (107), 28 states have internal predecessors, (107), 11 states have call successors, (39), 9 states have call predecessors, (39), 8 states have return successors, (35), 9 states have call predecessors, (35), 10 states have call successors, (35) [2021-11-20 06:39:59,430 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1096 transitions. [2021-11-20 06:39:59,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-20 06:39:59,434 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:59,435 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 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] [2021-11-20 06:39:59,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:39:59,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 06:39:59,650 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:59,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:59,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1718564348, now seen corresponding path program 3 times [2021-11-20 06:39:59,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:39:59,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618469016] [2021-11-20 06:39:59,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:59,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:39:59,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:59,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:39:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:59,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:39:59,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:59,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:39:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:59,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:39:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:59,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:39:59,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:00,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:40:00,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:00,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:40:00,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:00,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:40:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:00,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-20 06:40:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:00,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 06:40:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:00,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-20 06:40:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:00,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 06:40:00,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:00,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-20 06:40:00,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:00,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:40:00,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:00,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-20 06:40:00,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:00,382 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-20 06:40:00,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:40:00,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618469016] [2021-11-20 06:40:00,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618469016] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:40:00,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925813170] [2021-11-20 06:40:00,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:40:00,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:00,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:40:00,386 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:40:00,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 06:40:02,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 06:40:02,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:40:02,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 2521 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-20 06:40:02,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:40:04,042 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 67 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 06:40:04,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:40:04,655 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-20 06:40:04,655 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 40 treesize of output 35 [2021-11-20 06:40:04,660 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-20 06:40:04,660 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 19 [2021-11-20 06:40:04,765 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-20 06:40:04,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925813170] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:40:04,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:40:04,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 11] total 37 [2021-11-20 06:40:04,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599264308] [2021-11-20 06:40:04,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:40:04,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-20 06:40:04,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:40:04,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-20 06:40:04,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2021-11-20 06:40:04,768 INFO L87 Difference]: Start difference. First operand 718 states and 1096 transitions. Second operand has 37 states, 35 states have (on average 3.8) internal successors, (133), 33 states have internal predecessors, (133), 10 states have call successors, (44), 7 states have call predecessors, (44), 9 states have return successors, (40), 8 states have call predecessors, (40), 10 states have call successors, (40) [2021-11-20 06:40:12,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:40:12,875 INFO L93 Difference]: Finished difference Result 1666 states and 2786 transitions. [2021-11-20 06:40:12,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-20 06:40:12,876 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 3.8) internal successors, (133), 33 states have internal predecessors, (133), 10 states have call successors, (44), 7 states have call predecessors, (44), 9 states have return successors, (40), 8 states have call predecessors, (40), 10 states have call successors, (40) Word has length 119 [2021-11-20 06:40:12,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:40:12,887 INFO L225 Difference]: With dead ends: 1666 [2021-11-20 06:40:12,887 INFO L226 Difference]: Without dead ends: 1194 [2021-11-20 06:40:12,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 256 SyntacticMatches, 8 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1682 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=880, Invalid=6430, Unknown=0, NotChecked=0, Total=7310 [2021-11-20 06:40:12,896 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 322 mSDsluCounter, 2264 mSDsCounter, 0 mSdLazyCounter, 7171 mSolverCounterSat, 505 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 2534 SdHoareTripleChecker+Invalid, 8625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 505 IncrementalHoareTripleChecker+Valid, 7171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 949 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:40:12,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 2534 Invalid, 8625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [505 Valid, 7171 Invalid, 0 Unknown, 949 Unchecked, 5.3s Time] [2021-11-20 06:40:12,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-11-20 06:40:13,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1015. [2021-11-20 06:40:13,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 571 states have (on average 1.2329246935201401) internal successors, (704), 598 states have internal predecessors, (704), 386 states have call successors, (386), 49 states have call predecessors, (386), 57 states have return successors, (556), 367 states have call predecessors, (556), 385 states have call successors, (556) [2021-11-20 06:40:13,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1646 transitions. [2021-11-20 06:40:13,023 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1646 transitions. Word has length 119 [2021-11-20 06:40:13,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:40:13,024 INFO L470 AbstractCegarLoop]: Abstraction has 1015 states and 1646 transitions. [2021-11-20 06:40:13,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 3.8) internal successors, (133), 33 states have internal predecessors, (133), 10 states have call successors, (44), 7 states have call predecessors, (44), 9 states have return successors, (40), 8 states have call predecessors, (40), 10 states have call successors, (40) [2021-11-20 06:40:13,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1646 transitions. [2021-11-20 06:40:13,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-20 06:40:13,029 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:40:13,029 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:40:13,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 06:40:13,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:13,254 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:40:13,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:40:13,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1292205762, now seen corresponding path program 1 times [2021-11-20 06:40:13,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:40:13,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084111819] [2021-11-20 06:40:13,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:13,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:40:13,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:13,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:40:13,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:13,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:40:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:13,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:40:13,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:13,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:40:13,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:13,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:40:13,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:13,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 06:40:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:13,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:40:13,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:13,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:40:13,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:13,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:40:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:13,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-20 06:40:13,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:13,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:40:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:13,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:40:13,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:13,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:40:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:13,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:40:13,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:13,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 06:40:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:13,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:40:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:13,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 06:40:13,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:13,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-20 06:40:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:13,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-20 06:40:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-20 06:40:13,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:40:13,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084111819] [2021-11-20 06:40:13,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084111819] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:40:13,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:40:13,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:40:13,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177306573] [2021-11-20 06:40:13,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:40:13,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:40:13,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:40:13,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:40:13,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:40:13,537 INFO L87 Difference]: Start difference. First operand 1015 states and 1646 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-20 06:40:14,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:40:14,002 INFO L93 Difference]: Finished difference Result 1444 states and 2335 transitions. [2021-11-20 06:40:14,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:40:14,003 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 128 [2021-11-20 06:40:14,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:40:14,014 INFO L225 Difference]: With dead ends: 1444 [2021-11-20 06:40:14,014 INFO L226 Difference]: Without dead ends: 1041 [2021-11-20 06:40:14,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:40:14,023 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 124 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:40:14,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 341 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:40:14,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2021-11-20 06:40:14,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 1039. [2021-11-20 06:40:14,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 588 states have (on average 1.2261904761904763) internal successors, (721), 617 states have internal predecessors, (721), 386 states have call successors, (386), 49 states have call predecessors, (386), 64 states have return successors, (567), 372 states have call predecessors, (567), 385 states have call successors, (567) [2021-11-20 06:40:14,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1674 transitions. [2021-11-20 06:40:14,184 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1674 transitions. Word has length 128 [2021-11-20 06:40:14,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:40:14,185 INFO L470 AbstractCegarLoop]: Abstraction has 1039 states and 1674 transitions. [2021-11-20 06:40:14,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-20 06:40:14,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1674 transitions. [2021-11-20 06:40:14,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-20 06:40:14,190 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:40:14,190 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:40:14,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 06:40:14,191 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:40:14,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:40:14,191 INFO L85 PathProgramCache]: Analyzing trace with hash -403830380, now seen corresponding path program 1 times [2021-11-20 06:40:14,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:40:14,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395360370] [2021-11-20 06:40:14,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:14,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:40:14,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:14,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:40:14,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:14,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:40:14,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:14,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:40:14,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:14,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:40:14,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:14,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:40:14,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:14,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:40:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:14,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:40:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:14,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 06:40:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:14,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 06:40:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:14,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:40:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:14,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:40:14,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:14,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:40:14,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:14,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-20 06:40:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:14,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 06:40:14,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:14,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 06:40:14,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:14,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-20 06:40:14,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:14,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-11-20 06:40:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:14,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-20 06:40:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-20 06:40:14,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:40:14,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395360370] [2021-11-20 06:40:14,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395360370] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:40:14,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:40:14,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-20 06:40:14,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290146971] [2021-11-20 06:40:14,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:40:14,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:40:14,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:40:14,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:40:14,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:40:14,677 INFO L87 Difference]: Start difference. First operand 1039 states and 1674 transitions. Second operand has 16 states, 15 states have (on average 4.0) internal successors, (60), 11 states have internal predecessors, (60), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2021-11-20 06:40:15,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:40:15,776 INFO L93 Difference]: Finished difference Result 1045 states and 1679 transitions. [2021-11-20 06:40:15,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 06:40:15,777 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.0) internal successors, (60), 11 states have internal predecessors, (60), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) Word has length 137 [2021-11-20 06:40:15,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:40:15,790 INFO L225 Difference]: With dead ends: 1045 [2021-11-20 06:40:15,790 INFO L226 Difference]: Without dead ends: 1043 [2021-11-20 06:40:15,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:40:15,793 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 97 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:40:15,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 1048 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 06:40:15,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2021-11-20 06:40:15,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 1043. [2021-11-20 06:40:15,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 591 states have (on average 1.2250423011844331) internal successors, (724), 620 states have internal predecessors, (724), 386 states have call successors, (386), 50 states have call predecessors, (386), 65 states have return successors, (567), 372 states have call predecessors, (567), 385 states have call successors, (567) [2021-11-20 06:40:15,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1677 transitions. [2021-11-20 06:40:15,924 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1677 transitions. Word has length 137 [2021-11-20 06:40:15,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:40:15,924 INFO L470 AbstractCegarLoop]: Abstraction has 1043 states and 1677 transitions. [2021-11-20 06:40:15,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.0) internal successors, (60), 11 states have internal predecessors, (60), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2021-11-20 06:40:15,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1677 transitions. [2021-11-20 06:40:15,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-20 06:40:15,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:40:15,930 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:40:15,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-20 06:40:15,930 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:40:15,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:40:15,931 INFO L85 PathProgramCache]: Analyzing trace with hash -236851265, now seen corresponding path program 1 times [2021-11-20 06:40:15,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:40:15,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397387025] [2021-11-20 06:40:15,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:15,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:40:15,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:16,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:40:16,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:16,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:40:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:16,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:40:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:16,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:40:16,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:16,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:40:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:16,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 06:40:16,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:16,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:40:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:16,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:40:16,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:16,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:40:16,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:16,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-20 06:40:16,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:16,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:40:16,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:16,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:40:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:16,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:40:16,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:16,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:40:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:16,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 06:40:16,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:16,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:40:16,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:16,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 06:40:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:16,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-20 06:40:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:16,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-20 06:40:16,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:16,187 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-20 06:40:16,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:40:16,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397387025] [2021-11-20 06:40:16,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397387025] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:40:16,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:40:16,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:40:16,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267721967] [2021-11-20 06:40:16,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:40:16,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:40:16,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:40:16,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:40:16,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:40:16,189 INFO L87 Difference]: Start difference. First operand 1043 states and 1677 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-20 06:40:16,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:40:16,669 INFO L93 Difference]: Finished difference Result 1478 states and 2371 transitions. [2021-11-20 06:40:16,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:40:16,671 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 129 [2021-11-20 06:40:16,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:40:16,682 INFO L225 Difference]: With dead ends: 1478 [2021-11-20 06:40:16,682 INFO L226 Difference]: Without dead ends: 1071 [2021-11-20 06:40:16,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:40:16,688 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 62 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:40:16,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 364 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:40:16,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2021-11-20 06:40:16,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 1045. [2021-11-20 06:40:16,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 592 states have (on average 1.224662162162162) internal successors, (725), 622 states have internal predecessors, (725), 386 states have call successors, (386), 50 states have call predecessors, (386), 66 states have return successors, (568), 372 states have call predecessors, (568), 385 states have call successors, (568) [2021-11-20 06:40:16,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 1679 transitions. [2021-11-20 06:40:16,847 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 1679 transitions. Word has length 129 [2021-11-20 06:40:16,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:40:16,847 INFO L470 AbstractCegarLoop]: Abstraction has 1045 states and 1679 transitions. [2021-11-20 06:40:16,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-20 06:40:16,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 1679 transitions. [2021-11-20 06:40:16,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-20 06:40:16,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:40:16,852 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:40:16,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-20 06:40:16,852 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:40:16,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:40:16,852 INFO L85 PathProgramCache]: Analyzing trace with hash -2044305728, now seen corresponding path program 1 times [2021-11-20 06:40:16,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:40:16,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532779683] [2021-11-20 06:40:16,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:16,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:40:17,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:17,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:40:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:17,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:40:17,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:17,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:40:17,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:17,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:40:17,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:17,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:40:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:17,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 06:40:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:17,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:40:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:17,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:40:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:17,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:40:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:17,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-20 06:40:17,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:17,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:40:17,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:17,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:40:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:17,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:40:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:17,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:40:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:17,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 06:40:17,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:17,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:40:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:17,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 06:40:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:17,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-20 06:40:17,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:17,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-20 06:40:17,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:17,632 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-20 06:40:17,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:40:17,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532779683] [2021-11-20 06:40:17,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532779683] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:40:17,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688243577] [2021-11-20 06:40:17,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:17,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:17,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:40:17,638 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:40:17,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 06:40:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:18,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 2666 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-20 06:40:18,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:40:18,024 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 10 treesize of output 8 [2021-11-20 06:40:18,566 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-20 06:40:18,566 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 1 case distinctions, treesize of input 36 treesize of output 20 [2021-11-20 06:40:24,271 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 06:40:24,271 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 39 treesize of output 19 [2021-11-20 06:40:24,364 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 26 proven. 37 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-20 06:40:24,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:40:29,521 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#rhs~0#1.offset| Int) (v_DerPreprocessor_8 Int)) (let ((.cse2 (store (store (select |c_#memory_int| |c_ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#rhs~0#1.base|) |ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#rhs~0#1.offset| (select (select |c_#memory_int| |c_ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#lhs~0#1.base|) |c_ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#lhs~0#1.offset|)) (+ |ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#rhs~0#1.offset| 8) v_DerPreprocessor_8))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#rhs~0#1.base| .cse2) |c_ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#lhs~0#1.base|) |c_ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#lhs~0#1.offset|)) (.cse1 (select .cse2 |ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#rhs~0#1.offset|))) (< (+ .cse0 (* 18446744073709551616 (div .cse1 18446744073709551616))) (+ (* 18446744073709551616 (div .cse0 18446744073709551616)) .cse1 1))))) (forall ((|ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#rhs~0#1.offset| Int) (v_DerPreprocessor_8 Int)) (let ((.cse5 (store (store (select |c_#memory_int| |c_ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#rhs~0#1.base|) |ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#rhs~0#1.offset| (select (select |c_#memory_int| |c_ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#lhs~0#1.base|) |c_ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#lhs~0#1.offset|)) (+ |ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#rhs~0#1.offset| 8) v_DerPreprocessor_8))) (let ((.cse3 (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#rhs~0#1.base| .cse5) |c_ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#lhs~0#1.base|) |c_ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#lhs~0#1.offset|)) (.cse4 (select .cse5 |ULTIMATE.start_aws_byte_cursor_compare_lookup_harness_~#rhs~0#1.offset|))) (<= (+ (* 18446744073709551616 (div .cse3 18446744073709551616)) .cse4) (+ .cse3 (* 18446744073709551616 (div .cse4 18446744073709551616)))))))) is different from false [2021-11-20 06:40:29,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688243577] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:40:29,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:40:29,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 33 [2021-11-20 06:40:29,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8666411] [2021-11-20 06:40:29,541 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:40:29,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-20 06:40:29,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:40:29,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-20 06:40:29,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1209, Unknown=3, NotChecked=70, Total=1406 [2021-11-20 06:40:29,543 INFO L87 Difference]: Start difference. First operand 1045 states and 1679 transitions. Second operand has 33 states, 25 states have (on average 3.96) internal successors, (99), 29 states have internal predecessors, (99), 15 states have call successors, (39), 7 states have call predecessors, (39), 8 states have return successors, (37), 9 states have call predecessors, (37), 13 states have call successors, (37) [2021-11-20 06:40:43,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:40:43,927 INFO L93 Difference]: Finished difference Result 1371 states and 2185 transitions. [2021-11-20 06:40:43,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-20 06:40:43,928 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 25 states have (on average 3.96) internal successors, (99), 29 states have internal predecessors, (99), 15 states have call successors, (39), 7 states have call predecessors, (39), 8 states have return successors, (37), 9 states have call predecessors, (37), 13 states have call successors, (37) Word has length 129 [2021-11-20 06:40:43,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:40:43,940 INFO L225 Difference]: With dead ends: 1371 [2021-11-20 06:40:43,940 INFO L226 Difference]: Without dead ends: 1271 [2021-11-20 06:40:43,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 245 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=418, Invalid=4551, Unknown=5, NotChecked=138, Total=5112 [2021-11-20 06:40:43,945 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 313 mSDsluCounter, 1222 mSDsCounter, 0 mSdLazyCounter, 2727 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 1400 SdHoareTripleChecker+Invalid, 3488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 2727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 512 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:40:43,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 1400 Invalid, 3488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 2727 Invalid, 0 Unknown, 512 Unchecked, 2.1s Time] [2021-11-20 06:40:43,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2021-11-20 06:40:44,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 1154. [2021-11-20 06:40:44,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 655 states have (on average 1.2229007633587787) internal successors, (801), 687 states have internal predecessors, (801), 423 states have call successors, (423), 55 states have call predecessors, (423), 75 states have return successors, (621), 411 states have call predecessors, (621), 421 states have call successors, (621) [2021-11-20 06:40:44,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1845 transitions. [2021-11-20 06:40:44,094 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1845 transitions. Word has length 129 [2021-11-20 06:40:44,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:40:44,095 INFO L470 AbstractCegarLoop]: Abstraction has 1154 states and 1845 transitions. [2021-11-20 06:40:44,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 25 states have (on average 3.96) internal successors, (99), 29 states have internal predecessors, (99), 15 states have call successors, (39), 7 states have call predecessors, (39), 8 states have return successors, (37), 9 states have call predecessors, (37), 13 states have call successors, (37) [2021-11-20 06:40:44,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1845 transitions. [2021-11-20 06:40:44,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-20 06:40:44,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:40:44,100 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-11-20 06:40:44,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:40:44,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:44,314 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:40:44,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:40:44,314 INFO L85 PathProgramCache]: Analyzing trace with hash -834241185, now seen corresponding path program 1 times [2021-11-20 06:40:44,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:40:44,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741575052] [2021-11-20 06:40:44,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:44,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:40:44,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:44,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:40:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:44,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:40:44,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:44,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:40:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:44,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:40:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:44,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:40:44,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:44,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:40:44,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:44,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:40:44,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:44,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:40:44,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:44,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-20 06:40:44,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:44,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 06:40:44,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:44,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 06:40:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:44,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-20 06:40:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:44,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 06:40:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:44,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 06:40:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:44,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-20 06:40:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:44,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-20 06:40:44,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:44,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-20 06:40:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:44,687 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-20 06:40:44,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:40:44,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741575052] [2021-11-20 06:40:44,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741575052] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:40:44,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620856486] [2021-11-20 06:40:44,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:44,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:44,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:40:44,690 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:40:44,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 06:40:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:45,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 2687 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 06:40:45,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:40:45,415 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-20 06:40:45,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:40:45,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620856486] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:40:45,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:40:45,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 12 [2021-11-20 06:40:45,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284052579] [2021-11-20 06:40:45,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:40:45,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:40:45,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:40:45,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:40:45,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:40:45,417 INFO L87 Difference]: Start difference. First operand 1154 states and 1845 transitions. Second operand has 9 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-20 06:40:45,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:40:45,641 INFO L93 Difference]: Finished difference Result 1768 states and 2815 transitions. [2021-11-20 06:40:45,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:40:45,642 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 131 [2021-11-20 06:40:45,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:40:45,651 INFO L225 Difference]: With dead ends: 1768 [2021-11-20 06:40:45,651 INFO L226 Difference]: Without dead ends: 900 [2021-11-20 06:40:45,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:40:45,664 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 11 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:40:45,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1283 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:40:45,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2021-11-20 06:40:45,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 894. [2021-11-20 06:40:45,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 522 states have (on average 1.1762452107279693) internal successors, (614), 535 states have internal predecessors, (614), 304 states have call successors, (304), 55 states have call predecessors, (304), 67 states have return successors, (432), 303 states have call predecessors, (432), 302 states have call successors, (432) [2021-11-20 06:40:45,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1350 transitions. [2021-11-20 06:40:45,796 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1350 transitions. Word has length 131 [2021-11-20 06:40:45,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:40:45,797 INFO L470 AbstractCegarLoop]: Abstraction has 894 states and 1350 transitions. [2021-11-20 06:40:45,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-20 06:40:45,797 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1350 transitions. [2021-11-20 06:40:45,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-20 06:40:45,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:40:45,801 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 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] [2021-11-20 06:40:45,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 06:40:46,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-20 06:40:46,018 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:40:46,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:40:46,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1554147384, now seen corresponding path program 2 times [2021-11-20 06:40:46,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:40:46,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064640414] [2021-11-20 06:40:46,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:46,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:40:46,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:46,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:40:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:46,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:40:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:46,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:40:46,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:46,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:40:46,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:46,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:40:46,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:46,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:40:46,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:46,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:40:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:46,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:40:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:46,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-20 06:40:46,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:46,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 06:40:46,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:46,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 06:40:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:46,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-20 06:40:46,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:46,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-20 06:40:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:46,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:40:46,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:46,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-20 06:40:46,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:46,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-20 06:40:46,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:46,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-11-20 06:40:46,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:46,777 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-20 06:40:46,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:40:46,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064640414] [2021-11-20 06:40:46,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064640414] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:40:46,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240864550] [2021-11-20 06:40:46,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:40:46,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:46,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:40:46,778 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:40:46,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 06:40:48,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:40:48,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:40:48,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 2697 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-20 06:40:48,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:40:48,220 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 39 treesize of output 33 [2021-11-20 06:40:48,223 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 33 treesize of output 27 [2021-11-20 06:40:48,226 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 27 treesize of output 23 [2021-11-20 06:40:48,229 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 06:40:50,025 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 89 proven. 11 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-20 06:40:50,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:40:50,820 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 42 proven. 16 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-20 06:40:50,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240864550] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:40:50,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:40:50,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 11] total 41 [2021-11-20 06:40:50,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686410324] [2021-11-20 06:40:50,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:40:50,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-20 06:40:50,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:40:50,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-20 06:40:50,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 06:40:50,823 INFO L87 Difference]: Start difference. First operand 894 states and 1350 transitions. Second operand has 41 states, 38 states have (on average 3.9210526315789473) internal successors, (149), 37 states have internal predecessors, (149), 12 states have call successors, (53), 8 states have call predecessors, (53), 9 states have return successors, (49), 9 states have call predecessors, (49), 11 states have call successors, (49) [2021-11-20 06:41:01,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:01,516 INFO L93 Difference]: Finished difference Result 2087 states and 3323 transitions. [2021-11-20 06:41:01,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-20 06:41:01,517 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 3.9210526315789473) internal successors, (149), 37 states have internal predecessors, (149), 12 states have call successors, (53), 8 states have call predecessors, (53), 9 states have return successors, (49), 9 states have call predecessors, (49), 11 states have call successors, (49) Word has length 133 [2021-11-20 06:41:01,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:01,528 INFO L225 Difference]: With dead ends: 2087 [2021-11-20 06:41:01,528 INFO L226 Difference]: Without dead ends: 1300 [2021-11-20 06:41:01,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 287 SyntacticMatches, 8 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2547 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1115, Invalid=8785, Unknown=0, NotChecked=0, Total=9900 [2021-11-20 06:41:01,542 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 945 mSDsluCounter, 1713 mSDsCounter, 0 mSdLazyCounter, 8112 mSolverCounterSat, 1275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 948 SdHoareTripleChecker+Valid, 1957 SdHoareTripleChecker+Invalid, 10565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1275 IncrementalHoareTripleChecker+Valid, 8112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1178 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:01,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [948 Valid, 1957 Invalid, 10565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1275 Valid, 8112 Invalid, 0 Unknown, 1178 Unchecked, 7.0s Time] [2021-11-20 06:41:01,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2021-11-20 06:41:01,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1099. [2021-11-20 06:41:01,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 648 states have (on average 1.183641975308642) internal successors, (767), 663 states have internal predecessors, (767), 366 states have call successors, (366), 75 states have call predecessors, (366), 84 states have return successors, (484), 360 states have call predecessors, (484), 364 states have call successors, (484) [2021-11-20 06:41:01,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1617 transitions. [2021-11-20 06:41:01,727 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1617 transitions. Word has length 133 [2021-11-20 06:41:01,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:01,728 INFO L470 AbstractCegarLoop]: Abstraction has 1099 states and 1617 transitions. [2021-11-20 06:41:01,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 3.9210526315789473) internal successors, (149), 37 states have internal predecessors, (149), 12 states have call successors, (53), 8 states have call predecessors, (53), 9 states have return successors, (49), 9 states have call predecessors, (49), 11 states have call successors, (49) [2021-11-20 06:41:01,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1617 transitions. [2021-11-20 06:41:01,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-20 06:41:01,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:01,733 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:41:01,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 06:41:01,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 06:41:01,951 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:41:01,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:01,951 INFO L85 PathProgramCache]: Analyzing trace with hash -114155574, now seen corresponding path program 1 times [2021-11-20 06:41:01,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:01,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520654605] [2021-11-20 06:41:01,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:01,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:02,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:41:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:02,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:41:02,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:02,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:41:02,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:02,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:41:02,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:02,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:41:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:02,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:41:02,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:02,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:41:02,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:02,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:41:02,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:02,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-20 06:41:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:02,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 06:41:02,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:02,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-20 06:41:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:02,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 06:41:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:02,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:41:02,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:02,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-20 06:41:02,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:02,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-20 06:41:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:02,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-11-20 06:41:02,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:02,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-11-20 06:41:02,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:02,241 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-11-20 06:41:02,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:02,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520654605] [2021-11-20 06:41:02,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520654605] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:41:02,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:41:02,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 06:41:02,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616749868] [2021-11-20 06:41:02,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:41:02,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:41:02,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:02,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:41:02,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:41:02,242 INFO L87 Difference]: Start difference. First operand 1099 states and 1617 transitions. Second operand has 10 states, 9 states have (on average 5.666666666666667) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-20 06:41:02,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:02,861 INFO L93 Difference]: Finished difference Result 1113 states and 1634 transitions. [2021-11-20 06:41:02,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:41:02,862 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.666666666666667) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) Word has length 135 [2021-11-20 06:41:02,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:02,871 INFO L225 Difference]: With dead ends: 1113 [2021-11-20 06:41:02,871 INFO L226 Difference]: Without dead ends: 1111 [2021-11-20 06:41:02,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:41:02,873 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 139 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:02,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 717 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:41:02,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-11-20 06:41:03,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 1107. [2021-11-20 06:41:03,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 651 states have (on average 1.1827956989247312) internal successors, (770), 666 states have internal predecessors, (770), 370 states have call successors, (370), 76 states have call predecessors, (370), 85 states have return successors, (488), 364 states have call predecessors, (488), 368 states have call successors, (488) [2021-11-20 06:41:03,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1628 transitions. [2021-11-20 06:41:03,053 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1628 transitions. Word has length 135 [2021-11-20 06:41:03,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:03,054 INFO L470 AbstractCegarLoop]: Abstraction has 1107 states and 1628 transitions. [2021-11-20 06:41:03,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.666666666666667) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-20 06:41:03,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1628 transitions. [2021-11-20 06:41:03,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-20 06:41:03,059 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:03,059 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:03,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-20 06:41:03,059 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:41:03,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:03,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1913782608, now seen corresponding path program 1 times [2021-11-20 06:41:03,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:03,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141878247] [2021-11-20 06:41:03,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:03,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:03,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:03,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:41:03,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:03,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:41:03,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:03,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:41:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:03,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:41:03,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:03,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:41:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:03,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:41:03,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:03,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:41:03,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:03,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:41:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:03,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-20 06:41:03,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:03,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:41:03,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:03,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 06:41:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:03,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 06:41:03,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:03,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-20 06:41:03,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:03,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-20 06:41:03,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:03,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-20 06:41:03,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:03,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-20 06:41:03,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:03,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-11-20 06:41:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:03,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-20 06:41:03,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:03,521 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-20 06:41:03,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:03,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141878247] [2021-11-20 06:41:03,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141878247] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:41:03,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:41:03,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-20 06:41:03,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884019162] [2021-11-20 06:41:03,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:41:03,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 06:41:03,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:03,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 06:41:03,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:41:03,523 INFO L87 Difference]: Start difference. First operand 1107 states and 1628 transitions. Second operand has 15 states, 14 states have (on average 4.214285714285714) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2021-11-20 06:41:04,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:04,681 INFO L93 Difference]: Finished difference Result 1116 states and 1637 transitions. [2021-11-20 06:41:04,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:41:04,681 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.214285714285714) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) Word has length 142 [2021-11-20 06:41:04,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:04,689 INFO L225 Difference]: With dead ends: 1116 [2021-11-20 06:41:04,690 INFO L226 Difference]: Without dead ends: 1114 [2021-11-20 06:41:04,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:41:04,692 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 97 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:04,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 1044 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1137 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 06:41:04,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-11-20 06:41:04,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1112. [2021-11-20 06:41:04,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 654 states have (on average 1.1819571865443426) internal successors, (773), 669 states have internal predecessors, (773), 371 states have call successors, (371), 77 states have call predecessors, (371), 86 states have return successors, (489), 365 states have call predecessors, (489), 369 states have call successors, (489) [2021-11-20 06:41:04,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1633 transitions. [2021-11-20 06:41:04,840 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1633 transitions. Word has length 142 [2021-11-20 06:41:04,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:04,840 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 1633 transitions. [2021-11-20 06:41:04,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.214285714285714) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2021-11-20 06:41:04,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1633 transitions. [2021-11-20 06:41:04,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-20 06:41:04,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:04,846 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:41:04,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-20 06:41:04,846 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:41:04,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:04,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1404444202, now seen corresponding path program 1 times [2021-11-20 06:41:04,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:04,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277633257] [2021-11-20 06:41:04,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:04,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:04,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:04,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:41:04,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:05,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:41:05,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:05,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:41:05,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:05,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:41:05,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:05,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:41:05,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:05,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 06:41:05,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:05,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:41:05,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:05,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 06:41:05,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:05,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:41:05,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:05,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 06:41:05,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:05,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:41:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:05,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-20 06:41:05,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:05,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:41:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:05,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-20 06:41:05,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:05,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-20 06:41:05,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:05,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 06:41:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:05,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-20 06:41:05,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:05,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-20 06:41:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:05,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-11-20 06:41:05,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:05,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-11-20 06:41:05,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:05,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-11-20 06:41:05,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:05,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-11-20 06:41:05,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:05,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-11-20 06:41:05,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2021-11-20 06:41:05,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:05,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277633257] [2021-11-20 06:41:05,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277633257] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:41:05,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:41:05,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-20 06:41:05,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585868070] [2021-11-20 06:41:05,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:41:05,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 06:41:05,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:05,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 06:41:05,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:41:05,245 INFO L87 Difference]: Start difference. First operand 1112 states and 1633 transitions. Second operand has 15 states, 14 states have (on average 4.214285714285714) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2021-11-20 06:41:06,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:06,342 INFO L93 Difference]: Finished difference Result 1124 states and 1645 transitions. [2021-11-20 06:41:06,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:41:06,343 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.214285714285714) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) Word has length 173 [2021-11-20 06:41:06,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:06,351 INFO L225 Difference]: With dead ends: 1124 [2021-11-20 06:41:06,351 INFO L226 Difference]: Without dead ends: 1122 [2021-11-20 06:41:06,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:41:06,353 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 155 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:06,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 1036 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 06:41:06,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-11-20 06:41:06,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1117. [2021-11-20 06:41:06,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 657 states have (on average 1.1811263318112633) internal successors, (776), 672 states have internal predecessors, (776), 372 states have call successors, (372), 78 states have call predecessors, (372), 87 states have return successors, (490), 366 states have call predecessors, (490), 370 states have call successors, (490) [2021-11-20 06:41:06,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 1638 transitions. [2021-11-20 06:41:06,505 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 1638 transitions. Word has length 173 [2021-11-20 06:41:06,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:06,506 INFO L470 AbstractCegarLoop]: Abstraction has 1117 states and 1638 transitions. [2021-11-20 06:41:06,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.214285714285714) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (22), 2 states have call predecessors, (22), 1 states have call successors, (22) [2021-11-20 06:41:06,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 1638 transitions. [2021-11-20 06:41:06,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-20 06:41:06,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:06,512 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:41:06,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-20 06:41:06,513 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:41:06,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:06,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1972124766, now seen corresponding path program 1 times [2021-11-20 06:41:06,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:06,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625167163] [2021-11-20 06:41:06,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:06,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:06,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:41:06,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:06,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:41:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:06,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:41:06,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:06,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:41:06,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:06,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:41:06,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:07,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:41:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:07,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:41:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:07,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:41:07,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:07,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-20 06:41:07,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:07,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:41:07,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:07,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-20 06:41:07,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:07,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:41:07,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:07,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:41:07,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:07,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:41:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:07,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 06:41:07,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:07,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-20 06:41:07,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:07,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:41:07,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:07,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-20 06:41:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:07,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-20 06:41:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:07,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 06:41:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:07,342 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-20 06:41:07,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:07,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625167163] [2021-11-20 06:41:07,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625167163] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:41:07,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421939017] [2021-11-20 06:41:07,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:07,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:41:07,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:41:07,346 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:41:07,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 06:41:07,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:07,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 2753 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-20 06:41:07,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:41:07,863 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 06:41:07,868 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 06:41:08,337 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 49 treesize of output 45 [2021-11-20 06:41:08,340 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 45 treesize of output 41 [2021-11-20 06:41:08,342 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 41 treesize of output 33 [2021-11-20 06:41:08,344 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 30 treesize of output 22 [2021-11-20 06:41:08,414 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 37 treesize of output 25 [2021-11-20 06:41:08,417 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 22 treesize of output 10 [2021-11-20 06:41:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 83 proven. 8 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-20 06:41:08,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:41:09,238 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 38 treesize of output 32 [2021-11-20 06:41:09,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:41:09,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:41:09,286 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-20 06:41:09,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421939017] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:41:09,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:41:09,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 11] total 28 [2021-11-20 06:41:09,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884302346] [2021-11-20 06:41:09,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:41:09,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 06:41:09,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:09,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 06:41:09,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:41:09,289 INFO L87 Difference]: Start difference. First operand 1117 states and 1638 transitions. Second operand has 28 states, 26 states have (on average 5.269230769230769) internal successors, (137), 26 states have internal predecessors, (137), 12 states have call successors, (47), 7 states have call predecessors, (47), 9 states have return successors, (45), 10 states have call predecessors, (45), 12 states have call successors, (45) [2021-11-20 06:41:13,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:13,690 INFO L93 Difference]: Finished difference Result 2147 states and 3276 transitions. [2021-11-20 06:41:13,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-20 06:41:13,690 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 5.269230769230769) internal successors, (137), 26 states have internal predecessors, (137), 12 states have call successors, (47), 7 states have call predecessors, (47), 9 states have return successors, (45), 10 states have call predecessors, (45), 12 states have call successors, (45) Word has length 154 [2021-11-20 06:41:13,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:13,703 INFO L225 Difference]: With dead ends: 2147 [2021-11-20 06:41:13,703 INFO L226 Difference]: Without dead ends: 1494 [2021-11-20 06:41:13,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 338 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=406, Invalid=3500, Unknown=0, NotChecked=0, Total=3906 [2021-11-20 06:41:13,710 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 410 mSDsluCounter, 1660 mSDsCounter, 0 mSdLazyCounter, 3970 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 1865 SdHoareTripleChecker+Invalid, 5128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 3970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 605 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:13,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 1865 Invalid, 5128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 3970 Invalid, 0 Unknown, 605 Unchecked, 3.1s Time] [2021-11-20 06:41:13,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2021-11-20 06:41:13,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1139. [2021-11-20 06:41:13,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1139 states, 672 states have (on average 1.1770833333333333) internal successors, (791), 689 states have internal predecessors, (791), 376 states have call successors, (376), 79 states have call predecessors, (376), 90 states have return successors, (493), 370 states have call predecessors, (493), 374 states have call successors, (493) [2021-11-20 06:41:13,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1660 transitions. [2021-11-20 06:41:13,896 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1660 transitions. Word has length 154 [2021-11-20 06:41:13,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:13,896 INFO L470 AbstractCegarLoop]: Abstraction has 1139 states and 1660 transitions. [2021-11-20 06:41:13,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 5.269230769230769) internal successors, (137), 26 states have internal predecessors, (137), 12 states have call successors, (47), 7 states have call predecessors, (47), 9 states have return successors, (45), 10 states have call predecessors, (45), 12 states have call successors, (45) [2021-11-20 06:41:13,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1660 transitions. [2021-11-20 06:41:13,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-20 06:41:13,902 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:13,903 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:41:13,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 06:41:14,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-20 06:41:14,126 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:41:14,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:14,126 INFO L85 PathProgramCache]: Analyzing trace with hash -240168431, now seen corresponding path program 1 times [2021-11-20 06:41:14,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:14,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503775982] [2021-11-20 06:41:14,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:14,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:14,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:41:14,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:14,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:41:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:14,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:41:14,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:14,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:41:14,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:14,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:41:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:14,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:41:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:14,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:41:14,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:14,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 06:41:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:14,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 06:41:14,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:14,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:41:14,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:14,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:41:14,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:14,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:41:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:14,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-20 06:41:14,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:15,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:41:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:15,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:41:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:15,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-20 06:41:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:15,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-20 06:41:15,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:15,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 06:41:15,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:15,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:41:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:15,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-20 06:41:15,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:15,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 06:41:15,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:15,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-20 06:41:15,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:15,425 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 22 proven. 38 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-20 06:41:15,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:15,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503775982] [2021-11-20 06:41:15,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503775982] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:41:15,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846207162] [2021-11-20 06:41:15,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:15,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:41:15,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:41:15,429 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:41:15,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 06:41:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:15,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 2786 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-20 06:41:15,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:41:15,808 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 10 treesize of output 8 [2021-11-20 06:41:16,002 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 19 treesize of output 1 [2021-11-20 06:41:16,491 INFO L354 Elim1Store]: treesize reduction 92, result has 14.0 percent of original size [2021-11-20 06:41:16,492 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 2 case distinctions, treesize of input 46 treesize of output 26 [2021-11-20 06:41:16,584 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 06:41:16,584 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 38 treesize of output 18 [2021-11-20 06:41:16,925 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 91 proven. 4 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-20 06:41:16,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:41:38,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846207162] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:41:38,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:41:38,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 14] total 39 [2021-11-20 06:41:38,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20409381] [2021-11-20 06:41:38,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:41:38,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-20 06:41:38,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:41:38,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-20 06:41:38,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1601, Unknown=11, NotChecked=0, Total=1722 [2021-11-20 06:41:38,210 INFO L87 Difference]: Start difference. First operand 1139 states and 1660 transitions. Second operand has 39 states, 35 states have (on average 3.857142857142857) internal successors, (135), 35 states have internal predecessors, (135), 17 states have call successors, (45), 6 states have call predecessors, (45), 10 states have return successors, (44), 14 states have call predecessors, (44), 17 states have call successors, (44) [2021-11-20 06:41:44,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:44,821 INFO L93 Difference]: Finished difference Result 1801 states and 2674 transitions. [2021-11-20 06:41:44,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-20 06:41:44,822 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 35 states have (on average 3.857142857142857) internal successors, (135), 35 states have internal predecessors, (135), 17 states have call successors, (45), 6 states have call predecessors, (45), 10 states have return successors, (44), 14 states have call predecessors, (44), 17 states have call successors, (44) Word has length 165 [2021-11-20 06:41:44,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:44,829 INFO L225 Difference]: With dead ends: 1801 [2021-11-20 06:41:44,829 INFO L226 Difference]: Without dead ends: 1087 [2021-11-20 06:41:44,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 306 SyntacticMatches, 6 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=501, Invalid=5808, Unknown=11, NotChecked=0, Total=6320 [2021-11-20 06:41:44,835 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 381 mSDsluCounter, 1422 mSDsCounter, 0 mSdLazyCounter, 5224 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 1582 SdHoareTripleChecker+Invalid, 5957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 5224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 369 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:44,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 1582 Invalid, 5957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 5224 Invalid, 0 Unknown, 369 Unchecked, 4.4s Time] [2021-11-20 06:41:44,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-11-20 06:41:44,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 945. [2021-11-20 06:41:44,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 574 states have (on average 1.1445993031358885) internal successors, (657), 583 states have internal predecessors, (657), 287 states have call successors, (287), 73 states have call predecessors, (287), 83 states have return successors, (375), 288 states have call predecessors, (375), 286 states have call successors, (375) [2021-11-20 06:41:44,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1319 transitions. [2021-11-20 06:41:44,968 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1319 transitions. Word has length 165 [2021-11-20 06:41:44,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:44,968 INFO L470 AbstractCegarLoop]: Abstraction has 945 states and 1319 transitions. [2021-11-20 06:41:44,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 35 states have (on average 3.857142857142857) internal successors, (135), 35 states have internal predecessors, (135), 17 states have call successors, (45), 6 states have call predecessors, (45), 10 states have return successors, (44), 14 states have call predecessors, (44), 17 states have call successors, (44) [2021-11-20 06:41:44,969 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1319 transitions. [2021-11-20 06:41:44,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-20 06:41:44,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:44,976 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:41:45,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 06:41:45,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:41:45,190 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:41:45,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:45,190 INFO L85 PathProgramCache]: Analyzing trace with hash -204270123, now seen corresponding path program 1 times [2021-11-20 06:41:45,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:41:45,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41618151] [2021-11-20 06:41:45,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:45,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:41:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:45,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:41:45,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:45,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:41:45,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:45,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:41:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:45,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:41:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:45,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:41:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:45,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:41:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:45,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:41:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:45,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 06:41:45,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:45,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:41:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:45,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 06:41:45,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:45,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:41:45,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:45,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-20 06:41:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:45,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:41:45,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:45,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-20 06:41:45,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:46,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:41:46,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:46,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:41:46,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:46,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-20 06:41:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:46,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-20 06:41:46,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:46,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 06:41:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:46,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:41:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:46,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 06:41:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:46,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 06:41:46,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:46,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-20 06:41:46,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:46,319 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 46 proven. 17 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-11-20 06:41:46,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:46,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41618151] [2021-11-20 06:41:46,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41618151] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:41:46,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256353949] [2021-11-20 06:41:46,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:46,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:41:46,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:41:46,322 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:41:46,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9fb163-e157-4b1a-a079-4978f9fb1593/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 06:41:46,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:46,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 2829 conjuncts, 139 conjunts are in the unsatisfiable core [2021-11-20 06:41:46,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:41:46,831 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 10 treesize of output 8 [2021-11-20 06:41:47,129 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-20 06:41:47,129 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 29 treesize of output 13 [2021-11-20 06:41:48,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:41:48,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 26 [2021-11-20 06:41:48,407 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 06:41:54,155 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 11 treesize of output 7 [2021-11-20 06:42:20,816 WARN L227 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:42:21,827 INFO L354 Elim1Store]: treesize reduction 766, result has 36.0 percent of original size [2021-11-20 06:42:21,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 264 treesize of output 664