./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_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_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/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_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/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_75045b8e-d9bb-4f38-b075-183cb686fabb/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 884fded8e66f5d1fb48ea41b5fc2a80efc48c733a21e019f076525ed24611a3d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:07:13,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:07:13,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:07:13,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:07:13,413 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:07:13,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:07:13,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:07:13,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:07:13,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:07:13,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:07:13,424 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:07:13,426 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:07:13,426 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:07:13,428 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:07:13,430 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:07:13,431 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:07:13,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:07:13,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:07:13,436 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:07:13,439 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:07:13,441 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:07:13,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:07:13,444 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:07:13,445 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:07:13,449 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:07:13,450 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:07:13,450 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:07:13,451 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:07:13,452 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:07:13,453 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:07:13,453 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:07:13,454 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:07:13,455 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:07:13,456 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:07:13,458 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:07:13,458 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:07:13,459 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:07:13,459 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:07:13,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:07:13,461 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:07:13,462 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:07:13,464 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-20 07:07:13,489 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:07:13,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:07:13,490 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:07:13,490 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:07:13,491 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:07:13,491 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:07:13,492 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:07:13,492 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:07:13,493 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:07:13,493 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:07:13,493 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:07:13,494 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:07:13,494 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:07:13,494 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:07:13,494 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:07:13,495 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:07:13,495 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:07:13,495 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:07:13,495 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:07:13,496 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:07:13,496 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:07:13,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:07:13,496 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:07:13,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:07:13,497 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:07:13,497 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:07:13,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:07:13,498 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:07:13,498 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:07:13,498 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:07:13,499 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:07:13,499 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_75045b8e-d9bb-4f38-b075-183cb686fabb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 884fded8e66f5d1fb48ea41b5fc2a80efc48c733a21e019f076525ed24611a3d [2021-11-20 07:07:13,786 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:07:13,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:07:13,809 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:07:13,811 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:07:13,811 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:07:13,813 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i [2021-11-20 07:07:13,878 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/data/0c9a86c6b/170df74fe35641cc967f7190dffe48f1/FLAG128557360 [2021-11-20 07:07:14,685 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:07:14,686 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i [2021-11-20 07:07:14,729 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/data/0c9a86c6b/170df74fe35641cc967f7190dffe48f1/FLAG128557360 [2021-11-20 07:07:15,236 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/data/0c9a86c6b/170df74fe35641cc967f7190dffe48f1 [2021-11-20 07:07:15,246 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:07:15,247 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:07:15,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:07:15,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:07:15,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:07:15,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:07:15" (1/1) ... [2021-11-20 07:07:15,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@364c1b49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:15, skipping insertion in model container [2021-11-20 07:07:15,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:07:15" (1/1) ... [2021-11-20 07:07:15,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:07:15,397 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:07:15,709 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i[4492,4505] [2021-11-20 07:07:15,721 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_75045b8e-d9bb-4f38-b075-183cb686fabb/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i[4552,4565] [2021-11-20 07:07:16,943 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:07:16,946 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:07:16,948 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:07:16,949 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:07:16,953 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:07:16,983 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:07:16,991 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:07:16,998 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:07:16,999 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:07:17,445 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 07:07:17,446 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 07:07:17,447 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 07:07:17,449 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 07:07:17,450 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 07:07:17,451 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 07:07:17,452 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 07:07:17,453 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 07:07:17,454 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 07:07:17,454 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 07:07:17,612 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 07:07:17,769 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:07:17,770 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:07:17,838 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:07:17,901 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:07:17,931 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_75045b8e-d9bb-4f38-b075-183cb686fabb/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i[4492,4505] [2021-11-20 07:07:17,932 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_75045b8e-d9bb-4f38-b075-183cb686fabb/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i[4552,4565] [2021-11-20 07:07:17,983 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:07:17,983 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:07:17,985 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:07:17,985 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:07:17,986 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:07:18,000 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:07:18,002 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:07:18,003 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:07:18,003 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:07:18,082 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 07:07:18,083 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 07:07:18,084 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 07:07:18,086 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 07:07:18,087 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 07:07:18,087 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 07:07:18,089 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 07:07:18,089 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 07:07:18,090 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 07:07:18,090 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 07:07:18,131 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 07:07:18,226 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:07:18,226 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 07:07:18,276 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:07:18,556 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:07:18,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:18 WrapperNode [2021-11-20 07:07:18,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:07:18,559 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:07:18,559 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:07:18,560 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:07:18,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:18" (1/1) ... [2021-11-20 07:07:18,702 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:18" (1/1) ... [2021-11-20 07:07:18,783 INFO L137 Inliner]: procedures = 690, calls = 2637, calls flagged for inlining = 61, calls inlined = 8, statements flattened = 871 [2021-11-20 07:07:18,784 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:07:18,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:07:18,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:07:18,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:07:18,794 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:18" (1/1) ... [2021-11-20 07:07:18,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:18" (1/1) ... [2021-11-20 07:07:18,804 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:18" (1/1) ... [2021-11-20 07:07:18,805 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:18" (1/1) ... [2021-11-20 07:07:18,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:18" (1/1) ... [2021-11-20 07:07:18,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:18" (1/1) ... [2021-11-20 07:07:18,877 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:18" (1/1) ... [2021-11-20 07:07:18,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:07:18,917 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:07:18,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:07:18,923 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:07:18,924 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:18" (1/1) ... [2021-11-20 07:07:18,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:07:18,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:07:18,967 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:07:18,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:07:19,020 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-20 07:07:19,020 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-20 07:07:19,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 07:07:19,021 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-20 07:07:19,021 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-20 07:07:19,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real [2021-11-20 07:07:19,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-20 07:07:19,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-20 07:07:19,022 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 07:07:19,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-20 07:07:19,023 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-20 07:07:19,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 07:07:19,024 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 07:07:19,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 07:07:19,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:07:19,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 07:07:19,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:07:19,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:07:19,025 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-20 07:07:19,026 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-20 07:07:19,026 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-20 07:07:19,026 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-20 07:07:19,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-20 07:07:19,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-20 07:07:19,026 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 07:07:19,026 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 07:07:19,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 07:07:19,028 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 07:07:19,028 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_write [2021-11-20 07:07:19,028 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_write [2021-11-20 07:07:19,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 07:07:19,029 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-20 07:07:19,029 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-20 07:07:19,029 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-20 07:07:19,030 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-20 07:07:19,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 07:07:19,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~real [2021-11-20 07:07:19,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:07:19,429 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:07:19,433 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:07:21,088 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:07:21,096 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:07:21,096 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 07:07:21,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:07:21 BoogieIcfgContainer [2021-11-20 07:07:21,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:07:21,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:07:21,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:07:21,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:07:21,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:07:15" (1/3) ... [2021-11-20 07:07:21,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27acbaf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:07:21, skipping insertion in model container [2021-11-20 07:07:21,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:07:18" (2/3) ... [2021-11-20 07:07:21,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27acbaf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:07:21, skipping insertion in model container [2021-11-20 07:07:21,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:07:21" (3/3) ... [2021-11-20 07:07:21,106 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_write_harness.i [2021-11-20 07:07:21,111 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:07:21,111 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:07:21,160 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:07:21,166 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 07:07:21,166 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:07:21,186 INFO L276 IsEmpty]: Start isEmpty. Operand has 129 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 86 states have internal predecessors, (108), 32 states have call successors, (32), 10 states have call predecessors, (32), 10 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-11-20 07:07:21,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-20 07:07:21,196 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:21,196 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:07:21,197 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:07:21,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:21,202 INFO L85 PathProgramCache]: Analyzing trace with hash 259728785, now seen corresponding path program 1 times [2021-11-20 07:07:21,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:21,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028565657] [2021-11-20 07:07:21,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:21,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:21,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:21,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:07:21,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:21,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:07:21,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:21,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:07:21,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:21,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 07:07:21,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:21,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:07:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:21,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:07:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:21,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 07:07:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:21,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 07:07:21,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:22,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 07:07:22,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:22,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 07:07:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:22,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-20 07:07:22,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:22,047 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-20 07:07:22,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:22,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028565657] [2021-11-20 07:07:22,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028565657] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:07:22,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726932131] [2021-11-20 07:07:22,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:22,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:22,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:07:22,054 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:07:22,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:07:22,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:22,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 2510 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:07:22,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:07:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 07:07:23,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:07:23,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726932131] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:07:23,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:07:23,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-20 07:07:23,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7839666] [2021-11-20 07:07:23,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:07:23,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:07:23,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:23,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:07:23,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:07:23,070 INFO L87 Difference]: Start difference. First operand has 129 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 86 states have internal predecessors, (108), 32 states have call successors, (32), 10 states have call predecessors, (32), 10 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 07:07:23,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:23,412 INFO L93 Difference]: Finished difference Result 258 states and 370 transitions. [2021-11-20 07:07:23,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:07:23,415 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 77 [2021-11-20 07:07:23,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:23,428 INFO L225 Difference]: With dead ends: 258 [2021-11-20 07:07:23,429 INFO L226 Difference]: Without dead ends: 127 [2021-11-20 07:07:23,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:07:23,446 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 202 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:23,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 467 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:07:23,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-20 07:07:23,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-11-20 07:07:23,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 83 states have (on average 1.2530120481927711) internal successors, (104), 85 states have internal predecessors, (104), 32 states have call successors, (32), 10 states have call predecessors, (32), 11 states have return successors, (34), 31 states have call predecessors, (34), 31 states have call successors, (34) [2021-11-20 07:07:23,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 170 transitions. [2021-11-20 07:07:23,528 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 170 transitions. Word has length 77 [2021-11-20 07:07:23,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:23,530 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 170 transitions. [2021-11-20 07:07:23,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 07:07:23,530 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 170 transitions. [2021-11-20 07:07:23,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-20 07:07:23,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:23,542 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-20 07:07:23,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:07:23,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:23,758 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:07:23,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:23,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1492783356, now seen corresponding path program 1 times [2021-11-20 07:07:23,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:23,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448119933] [2021-11-20 07:07:23,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:23,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:24,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:07:24,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:24,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:07:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:24,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:07:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:24,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 07:07:24,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:24,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:07:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:24,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:07:24,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:24,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 07:07:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:24,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 07:07:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:24,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 07:07:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:24,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 07:07:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:24,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 07:07:24,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:24,194 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-20 07:07:24,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:24,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448119933] [2021-11-20 07:07:24,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448119933] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:07:24,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285390427] [2021-11-20 07:07:24,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:24,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:24,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:07:24,202 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:07:24,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:07:24,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:24,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 2527 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:07:24,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:07:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:07:25,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:07:25,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285390427] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:07:25,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:07:25,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-11-20 07:07:25,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301077640] [2021-11-20 07:07:25,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:07:25,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:07:25,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:25,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:07:25,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:07:25,054 INFO L87 Difference]: Start difference. First operand 127 states and 170 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, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-20 07:07:25,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:25,486 INFO L93 Difference]: Finished difference Result 220 states and 297 transitions. [2021-11-20 07:07:25,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:07:25,487 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, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 83 [2021-11-20 07:07:25,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:25,498 INFO L225 Difference]: With dead ends: 220 [2021-11-20 07:07:25,498 INFO L226 Difference]: Without dead ends: 124 [2021-11-20 07:07:25,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-20 07:07:25,501 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 207 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:25,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 640 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:07:25,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-20 07:07:25,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-11-20 07:07:25,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 82 states have internal predecessors, (101), 32 states have call successors, (32), 10 states have call predecessors, (32), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-20 07:07:25,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 164 transitions. [2021-11-20 07:07:25,538 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 164 transitions. Word has length 83 [2021-11-20 07:07:25,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:25,540 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 164 transitions. [2021-11-20 07:07:25,541 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, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-20 07:07:25,541 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 164 transitions. [2021-11-20 07:07:25,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-20 07:07:25,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:25,545 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:07:25,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:07:25,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-20 07:07:25,769 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:07:25,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:25,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1451742418, now seen corresponding path program 1 times [2021-11-20 07:07:25,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:25,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965034305] [2021-11-20 07:07:25,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:25,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:26,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:07:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:26,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:07:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:26,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:07:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:26,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 07:07:26,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:26,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:07:26,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:26,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:07:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:26,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 07:07:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:26,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 07:07:26,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:26,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 07:07:26,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:26,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 07:07:26,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:26,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-20 07:07:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:26,350 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-20 07:07:26,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:26,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965034305] [2021-11-20 07:07:26,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965034305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:07:26,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:07:26,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 07:07:26,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453843155] [2021-11-20 07:07:26,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:07:26,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:07:26,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:26,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:07:26,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:07:26,355 INFO L87 Difference]: Start difference. First operand 124 states and 164 transitions. Second operand has 9 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-20 07:07:27,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:27,460 INFO L93 Difference]: Finished difference Result 136 states and 180 transitions. [2021-11-20 07:07:27,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:07:27,461 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 95 [2021-11-20 07:07:27,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:27,464 INFO L225 Difference]: With dead ends: 136 [2021-11-20 07:07:27,464 INFO L226 Difference]: Without dead ends: 134 [2021-11-20 07:07:27,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:07:27,466 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 86 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:27,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 746 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 07:07:27,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-20 07:07:27,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2021-11-20 07:07:27,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 87 states have (on average 1.2298850574712643) internal successors, (107), 89 states have internal predecessors, (107), 33 states have call successors, (33), 11 states have call predecessors, (33), 12 states have return successors, (37), 32 states have call predecessors, (37), 32 states have call successors, (37) [2021-11-20 07:07:27,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 177 transitions. [2021-11-20 07:07:27,486 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 177 transitions. Word has length 95 [2021-11-20 07:07:27,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:27,487 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 177 transitions. [2021-11-20 07:07:27,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-20 07:07:27,488 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 177 transitions. [2021-11-20 07:07:27,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-20 07:07:27,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:27,490 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:07:27,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 07:07:27,490 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:07:27,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:27,491 INFO L85 PathProgramCache]: Analyzing trace with hash -364356006, now seen corresponding path program 1 times [2021-11-20 07:07:27,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:27,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694551407] [2021-11-20 07:07:27,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:27,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:27,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:27,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:07:27,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:27,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:07:27,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:27,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:07:28,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:28,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 07:07:28,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:28,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:07:28,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:28,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:07:28,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:28,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 07:07:28,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:28,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 07:07:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:28,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 07:07:28,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:28,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 07:07:28,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:28,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-20 07:07:28,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:28,234 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 07:07:28,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:28,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694551407] [2021-11-20 07:07:28,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694551407] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:07:28,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:07:28,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:07:28,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248444180] [2021-11-20 07:07:28,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:07:28,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:07:28,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:28,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:07:28,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:07:28,241 INFO L87 Difference]: Start difference. First operand 133 states and 177 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-20 07:07:28,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:28,955 INFO L93 Difference]: Finished difference Result 267 states and 371 transitions. [2021-11-20 07:07:28,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:07:28,956 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 99 [2021-11-20 07:07:28,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:28,959 INFO L225 Difference]: With dead ends: 267 [2021-11-20 07:07:28,960 INFO L226 Difference]: Without dead ends: 158 [2021-11-20 07:07:28,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:07:28,962 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 126 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:28,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 439 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 07:07:28,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-20 07:07:28,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 138. [2021-11-20 07:07:28,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 92 states have (on average 1.2391304347826086) internal successors, (114), 94 states have internal predecessors, (114), 33 states have call successors, (33), 11 states have call predecessors, (33), 12 states have return successors, (37), 32 states have call predecessors, (37), 32 states have call successors, (37) [2021-11-20 07:07:28,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 184 transitions. [2021-11-20 07:07:28,985 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 184 transitions. Word has length 99 [2021-11-20 07:07:28,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:28,986 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 184 transitions. [2021-11-20 07:07:28,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-20 07:07:28,987 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 184 transitions. [2021-11-20 07:07:28,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-20 07:07:28,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:28,989 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:07:28,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 07:07:28,990 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:07:28,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:28,990 INFO L85 PathProgramCache]: Analyzing trace with hash -106190568, now seen corresponding path program 1 times [2021-11-20 07:07:28,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:28,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242861038] [2021-11-20 07:07:28,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:28,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:29,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:07:29,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:29,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:07:29,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:29,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:07:29,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:29,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 07:07:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:29,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:07:29,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:29,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:07:29,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:29,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 07:07:29,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:29,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 07:07:29,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:29,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 07:07:29,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:29,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 07:07:29,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:29,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-20 07:07:29,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:29,828 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-20 07:07:29,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:29,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242861038] [2021-11-20 07:07:29,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242861038] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:07:29,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915812357] [2021-11-20 07:07:29,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:29,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:29,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:07:29,834 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:07:29,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:07:30,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:30,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 2568 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-20 07:07:30,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:07:30,787 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 07:07:32,325 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 69 treesize of output 53 [2021-11-20 07:07:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 38 proven. 26 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 07:07:32,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:07:33,450 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 34 [2021-11-20 07:07:33,883 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-20 07:07:33,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915812357] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:07:33,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:07:33,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 19] total 41 [2021-11-20 07:07:33,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557043757] [2021-11-20 07:07:33,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:07:33,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-20 07:07:33,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:33,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-20 07:07:33,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 07:07:33,887 INFO L87 Difference]: Start difference. First operand 138 states and 184 transitions. Second operand has 41 states, 36 states have (on average 3.5277777777777777) internal successors, (127), 34 states have internal predecessors, (127), 17 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (31), 15 states have call predecessors, (31), 16 states have call successors, (31) [2021-11-20 07:07:40,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:40,294 INFO L93 Difference]: Finished difference Result 432 states and 623 transitions. [2021-11-20 07:07:40,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-20 07:07:40,295 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 36 states have (on average 3.5277777777777777) internal successors, (127), 34 states have internal predecessors, (127), 17 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (31), 15 states have call predecessors, (31), 16 states have call successors, (31) Word has length 99 [2021-11-20 07:07:40,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:40,299 INFO L225 Difference]: With dead ends: 432 [2021-11-20 07:07:40,300 INFO L226 Difference]: Without dead ends: 333 [2021-11-20 07:07:40,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 188 SyntacticMatches, 12 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=545, Invalid=5617, Unknown=0, NotChecked=0, Total=6162 [2021-11-20 07:07:40,304 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 543 mSDsluCounter, 2536 mSDsCounter, 0 mSdLazyCounter, 3557 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 2750 SdHoareTripleChecker+Invalid, 4598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 3557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 793 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:40,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [586 Valid, 2750 Invalid, 4598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 3557 Invalid, 0 Unknown, 793 Unchecked, 4.4s Time] [2021-11-20 07:07:40,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-11-20 07:07:40,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 218. [2021-11-20 07:07:40,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 152 states have (on average 1.25) internal successors, (190), 155 states have internal predecessors, (190), 48 states have call successors, (48), 14 states have call predecessors, (48), 17 states have return successors, (70), 48 states have call predecessors, (70), 47 states have call successors, (70) [2021-11-20 07:07:40,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 308 transitions. [2021-11-20 07:07:40,345 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 308 transitions. Word has length 99 [2021-11-20 07:07:40,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:40,346 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 308 transitions. [2021-11-20 07:07:40,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 36 states have (on average 3.5277777777777777) internal successors, (127), 34 states have internal predecessors, (127), 17 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (31), 15 states have call predecessors, (31), 16 states have call successors, (31) [2021-11-20 07:07:40,346 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 308 transitions. [2021-11-20 07:07:40,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-20 07:07:40,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:40,349 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:07:40,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:07:40,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:40,574 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:07:40,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:40,574 INFO L85 PathProgramCache]: Analyzing trace with hash 112664150, now seen corresponding path program 1 times [2021-11-20 07:07:40,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:40,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107724103] [2021-11-20 07:07:40,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:40,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:41,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:07:41,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:41,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:07:41,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:41,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:07:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:41,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 07:07:41,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:41,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:07:41,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:41,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:07:41,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:41,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 07:07:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:41,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 07:07:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:41,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 07:07:41,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:41,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 07:07:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:41,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-20 07:07:41,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-20 07:07:41,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:41,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107724103] [2021-11-20 07:07:41,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107724103] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:07:41,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141397064] [2021-11-20 07:07:41,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:41,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:41,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:07:41,425 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:07:41,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:07:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:41,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 2573 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-20 07:07:41,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:07:42,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 07:07:42,718 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:07:42,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:07:42,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141397064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:07:42,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:07:42,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [12] total 19 [2021-11-20 07:07:42,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319807722] [2021-11-20 07:07:42,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:07:42,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 07:07:42,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:42,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 07:07:42,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-20 07:07:42,721 INFO L87 Difference]: Start difference. First operand 218 states and 308 transitions. Second operand has 14 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-20 07:07:43,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:43,195 INFO L93 Difference]: Finished difference Result 468 states and 663 transitions. [2021-11-20 07:07:43,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:07:43,196 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 99 [2021-11-20 07:07:43,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:43,200 INFO L225 Difference]: With dead ends: 468 [2021-11-20 07:07:43,201 INFO L226 Difference]: Without dead ends: 320 [2021-11-20 07:07:43,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-20 07:07:43,203 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 55 mSDsluCounter, 1508 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1694 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:43,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1694 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 157 Invalid, 0 Unknown, 150 Unchecked, 0.4s Time] [2021-11-20 07:07:43,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-11-20 07:07:43,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 282. [2021-11-20 07:07:43,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 205 states have (on average 1.2536585365853659) internal successors, (257), 209 states have internal predecessors, (257), 54 states have call successors, (54), 20 states have call predecessors, (54), 22 states have return successors, (81), 52 states have call predecessors, (81), 53 states have call successors, (81) [2021-11-20 07:07:43,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 392 transitions. [2021-11-20 07:07:43,239 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 392 transitions. Word has length 99 [2021-11-20 07:07:43,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:43,240 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 392 transitions. [2021-11-20 07:07:43,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-20 07:07:43,240 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 392 transitions. [2021-11-20 07:07:43,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-20 07:07:43,243 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:43,243 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 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] [2021-11-20 07:07:43,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:07:43,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:43,456 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:07:43,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:43,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1349065372, now seen corresponding path program 2 times [2021-11-20 07:07:43,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:43,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898017956] [2021-11-20 07:07:43,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:43,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:43,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:07:43,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:43,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:07:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:43,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:07:43,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:43,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 07:07:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:43,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:07:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:43,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:07:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:43,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 07:07:43,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:43,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 07:07:43,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:43,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 07:07:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:43,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-20 07:07:43,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:43,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-20 07:07:43,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:43,821 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-20 07:07:43,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:43,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898017956] [2021-11-20 07:07:43,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898017956] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:07:43,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058532842] [2021-11-20 07:07:43,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:07:43,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:43,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:07:43,830 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:07:43,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:07:44,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:07:44,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:07:44,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 2580 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 07:07:44,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:07:45,246 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 07:07:45,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:07:45,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058532842] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:07:45,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:07:45,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2021-11-20 07:07:45,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196488169] [2021-11-20 07:07:45,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:07:45,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:07:45,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:45,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:07:45,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:07:45,249 INFO L87 Difference]: Start difference. First operand 282 states and 392 transitions. Second operand has 9 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 07:07:45,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:45,377 INFO L93 Difference]: Finished difference Result 491 states and 703 transitions. [2021-11-20 07:07:45,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:07:45,378 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 103 [2021-11-20 07:07:45,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:45,382 INFO L225 Difference]: With dead ends: 491 [2021-11-20 07:07:45,382 INFO L226 Difference]: Without dead ends: 297 [2021-11-20 07:07:45,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:07:45,384 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 12 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:45,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1259 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:07:45,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-11-20 07:07:45,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 292. [2021-11-20 07:07:45,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 213 states have (on average 1.244131455399061) internal successors, (265), 219 states have internal predecessors, (265), 54 states have call successors, (54), 20 states have call predecessors, (54), 24 states have return successors, (99), 52 states have call predecessors, (99), 53 states have call successors, (99) [2021-11-20 07:07:45,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 418 transitions. [2021-11-20 07:07:45,418 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 418 transitions. Word has length 103 [2021-11-20 07:07:45,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:45,419 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 418 transitions. [2021-11-20 07:07:45,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 07:07:45,419 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 418 transitions. [2021-11-20 07:07:45,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-20 07:07:45,422 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:45,423 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:07:45,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:07:45,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 07:07:45,650 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:07:45,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:45,650 INFO L85 PathProgramCache]: Analyzing trace with hash 878913731, now seen corresponding path program 1 times [2021-11-20 07:07:45,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:45,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053539060] [2021-11-20 07:07:45,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:45,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:45,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:45,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:07:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:45,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:07:45,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:45,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:07:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:45,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 07:07:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:45,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:07:45,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:45,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:07:45,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:45,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:07:45,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:45,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 07:07:45,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:45,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 07:07:45,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:45,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 07:07:45,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:45,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-20 07:07:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:45,879 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-20 07:07:45,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:45,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053539060] [2021-11-20 07:07:45,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053539060] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:07:45,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87229127] [2021-11-20 07:07:45,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:45,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:45,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:07:45,882 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:07:45,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 07:07:46,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:46,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 2590 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:07:46,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:07:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-20 07:07:46,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:07:46,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87229127] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:07:46,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:07:46,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-11-20 07:07:46,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664518402] [2021-11-20 07:07:46,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:07:46,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:07:46,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:46,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:07:46,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:07:46,543 INFO L87 Difference]: Start difference. First operand 292 states and 418 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 07:07:46,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:46,604 INFO L93 Difference]: Finished difference Result 506 states and 754 transitions. [2021-11-20 07:07:46,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:07:46,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 105 [2021-11-20 07:07:46,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:46,608 INFO L225 Difference]: With dead ends: 506 [2021-11-20 07:07:46,608 INFO L226 Difference]: Without dead ends: 302 [2021-11-20 07:07:46,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:07:46,611 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 9 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:46,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 480 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:07:46,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-20 07:07:46,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 294. [2021-11-20 07:07:46,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 215 states have (on average 1.2325581395348837) internal successors, (265), 221 states have internal predecessors, (265), 54 states have call successors, (54), 20 states have call predecessors, (54), 24 states have return successors, (99), 52 states have call predecessors, (99), 53 states have call successors, (99) [2021-11-20 07:07:46,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 418 transitions. [2021-11-20 07:07:46,645 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 418 transitions. Word has length 105 [2021-11-20 07:07:46,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:46,645 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 418 transitions. [2021-11-20 07:07:46,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 07:07:46,646 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 418 transitions. [2021-11-20 07:07:46,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-20 07:07:46,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:46,651 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 07:07:46,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:07:46,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:46,866 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:07:46,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:46,866 INFO L85 PathProgramCache]: Analyzing trace with hash 536310872, now seen corresponding path program 1 times [2021-11-20 07:07:46,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:46,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556044560] [2021-11-20 07:07:46,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:46,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:46,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:46,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:07:46,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:46,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:07:46,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:46,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:07:46,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:47,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 07:07:47,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:47,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:07:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:47,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:07:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:47,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 07:07:47,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:47,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 07:07:47,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:47,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 07:07:47,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:47,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 07:07:47,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:47,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-20 07:07:47,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:47,089 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-20 07:07:47,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:47,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556044560] [2021-11-20 07:07:47,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556044560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:07:47,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766755377] [2021-11-20 07:07:47,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:47,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:47,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:07:47,091 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:07:47,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 07:07:47,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:47,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 2568 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:07:47,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:07:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 07:07:47,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:07:47,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766755377] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:07:47,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:07:47,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-11-20 07:07:47,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584407733] [2021-11-20 07:07:47,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:07:47,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:07:47,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:47,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:07:47,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:07:47,746 INFO L87 Difference]: Start difference. First operand 294 states and 418 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 07:07:47,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:47,784 INFO L93 Difference]: Finished difference Result 485 states and 694 transitions. [2021-11-20 07:07:47,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:07:47,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 99 [2021-11-20 07:07:47,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:47,787 INFO L225 Difference]: With dead ends: 485 [2021-11-20 07:07:47,787 INFO L226 Difference]: Without dead ends: 271 [2021-11-20 07:07:47,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:07:47,790 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 20 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:47,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 484 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:07:47,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-11-20 07:07:47,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 261. [2021-11-20 07:07:47,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 189 states have (on average 1.2116402116402116) internal successors, (229), 192 states have internal predecessors, (229), 51 states have call successors, (51), 18 states have call predecessors, (51), 20 states have return successors, (84), 50 states have call predecessors, (84), 50 states have call successors, (84) [2021-11-20 07:07:47,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 364 transitions. [2021-11-20 07:07:47,813 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 364 transitions. Word has length 99 [2021-11-20 07:07:47,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:47,814 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 364 transitions. [2021-11-20 07:07:47,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 07:07:47,814 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 364 transitions. [2021-11-20 07:07:47,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-20 07:07:47,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:47,817 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:07:47,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:07:48,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:48,030 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:07:48,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:48,030 INFO L85 PathProgramCache]: Analyzing trace with hash -419718323, now seen corresponding path program 1 times [2021-11-20 07:07:48,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:48,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082206026] [2021-11-20 07:07:48,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:48,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:48,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:48,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:07:48,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:48,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:07:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:48,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:07:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:48,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 07:07:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:48,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:07:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:48,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:07:48,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:48,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:07:48,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:48,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 07:07:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:48,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-20 07:07:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:48,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-20 07:07:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:48,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-20 07:07:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:48,343 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-20 07:07:48,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:48,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082206026] [2021-11-20 07:07:48,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082206026] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:07:48,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855950334] [2021-11-20 07:07:48,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:48,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:48,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:07:48,350 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:07:48,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 07:07:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:48,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 2599 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:07:48,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:07:49,050 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-20 07:07:49,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:07:49,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855950334] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:07:49,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:07:49,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-11-20 07:07:49,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119448444] [2021-11-20 07:07:49,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:07:49,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:07:49,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:49,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:07:49,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:07:49,052 INFO L87 Difference]: Start difference. First operand 261 states and 364 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 07:07:49,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:49,091 INFO L93 Difference]: Finished difference Result 457 states and 651 transitions. [2021-11-20 07:07:49,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:07:49,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 109 [2021-11-20 07:07:49,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:49,094 INFO L225 Difference]: With dead ends: 457 [2021-11-20 07:07:49,094 INFO L226 Difference]: Without dead ends: 232 [2021-11-20 07:07:49,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:07:49,097 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 34 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:49,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 484 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:07:49,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-20 07:07:49,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 223. [2021-11-20 07:07:49,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 155 states have (on average 1.167741935483871) internal successors, (181), 158 states have internal predecessors, (181), 48 states have call successors, (48), 16 states have call predecessors, (48), 19 states have return successors, (69), 48 states have call predecessors, (69), 47 states have call successors, (69) [2021-11-20 07:07:49,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 298 transitions. [2021-11-20 07:07:49,121 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 298 transitions. Word has length 109 [2021-11-20 07:07:49,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:49,121 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 298 transitions. [2021-11-20 07:07:49,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 07:07:49,122 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 298 transitions. [2021-11-20 07:07:49,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-20 07:07:49,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:49,125 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 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] [2021-11-20 07:07:49,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 07:07:49,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 07:07:49,346 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:07:49,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:49,346 INFO L85 PathProgramCache]: Analyzing trace with hash -423036132, now seen corresponding path program 3 times [2021-11-20 07:07:49,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:49,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545482440] [2021-11-20 07:07:49,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:49,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:49,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:49,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:07:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:49,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:07:49,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:49,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:07:49,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:49,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 07:07:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:49,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:07:49,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:49,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:07:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:49,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 07:07:49,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:49,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 07:07:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:49,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 07:07:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:49,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-20 07:07:49,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:49,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-20 07:07:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:49,756 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-20 07:07:49,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:49,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545482440] [2021-11-20 07:07:49,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545482440] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:07:49,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622602445] [2021-11-20 07:07:49,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:07:49,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:49,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:07:49,762 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:07:49,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 07:07:51,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 07:07:51,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:07:51,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 2519 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 07:07:51,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:07:51,524 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 07:07:51,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:07:51,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622602445] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:07:51,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:07:51,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2021-11-20 07:07:51,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373305473] [2021-11-20 07:07:51,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:07:51,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:07:51,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:51,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:07:51,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:07:51,528 INFO L87 Difference]: Start difference. First operand 223 states and 298 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, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 07:07:51,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:51,685 INFO L93 Difference]: Finished difference Result 370 states and 499 transitions. [2021-11-20 07:07:51,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:07:51,685 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, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 103 [2021-11-20 07:07:51,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:51,688 INFO L225 Difference]: With dead ends: 370 [2021-11-20 07:07:51,688 INFO L226 Difference]: Without dead ends: 202 [2021-11-20 07:07:51,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:07:51,690 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 12 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:51,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1239 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:07:51,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-20 07:07:51,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2021-11-20 07:07:51,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 131 states have (on average 1.183206106870229) internal successors, (155), 132 states have internal predecessors, (155), 46 states have call successors, (46), 15 states have call predecessors, (46), 16 states have return successors, (57), 46 states have call predecessors, (57), 45 states have call successors, (57) [2021-11-20 07:07:51,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 258 transitions. [2021-11-20 07:07:51,710 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 258 transitions. Word has length 103 [2021-11-20 07:07:51,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:51,710 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 258 transitions. [2021-11-20 07:07:51,711 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, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 07:07:51,711 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 258 transitions. [2021-11-20 07:07:51,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-20 07:07:51,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:51,713 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 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] [2021-11-20 07:07:51,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 07:07:51,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:51,927 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:07:51,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:51,927 INFO L85 PathProgramCache]: Analyzing trace with hash -852360631, now seen corresponding path program 1 times [2021-11-20 07:07:51,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:51,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321576945] [2021-11-20 07:07:51,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:51,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:52,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:52,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:07:52,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:52,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:07:52,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:52,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:07:52,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:52,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 07:07:52,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:52,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:07:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:52,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:07:52,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:52,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 07:07:52,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:52,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 07:07:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:52,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 07:07:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:52,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 07:07:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:52,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-20 07:07:52,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:52,596 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-20 07:07:52,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:52,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321576945] [2021-11-20 07:07:52,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321576945] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:07:52,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389578140] [2021-11-20 07:07:52,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:52,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:52,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:07:52,598 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:07:52,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 07:07:53,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:53,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 2587 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 07:07:53,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:07:53,238 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 18 treesize of output 14 [2021-11-20 07:07:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-20 07:07:53,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:07:53,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389578140] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:07:53,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:07:53,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [14] total 23 [2021-11-20 07:07:53,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14436246] [2021-11-20 07:07:53,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:07:53,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 07:07:53,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:53,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 07:07:53,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:07:53,729 INFO L87 Difference]: Start difference. First operand 194 states and 258 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 10 states have internal predecessors, (61), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-20 07:07:53,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:07:53,858 INFO L93 Difference]: Finished difference Result 323 states and 428 transitions. [2021-11-20 07:07:53,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:07:53,858 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 10 states have internal predecessors, (61), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 105 [2021-11-20 07:07:53,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:07:53,860 INFO L225 Difference]: With dead ends: 323 [2021-11-20 07:07:53,860 INFO L226 Difference]: Without dead ends: 159 [2021-11-20 07:07:53,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-11-20 07:07:53,862 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 89 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:07:53,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 675 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 54 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2021-11-20 07:07:53,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-20 07:07:53,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2021-11-20 07:07:53,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 106 states have (on average 1.1886792452830188) internal successors, (126), 107 states have internal predecessors, (126), 35 states have call successors, (35), 12 states have call predecessors, (35), 13 states have return successors, (41), 35 states have call predecessors, (41), 34 states have call successors, (41) [2021-11-20 07:07:53,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 202 transitions. [2021-11-20 07:07:53,875 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 202 transitions. Word has length 105 [2021-11-20 07:07:53,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:07:53,876 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 202 transitions. [2021-11-20 07:07:53,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 10 states have internal predecessors, (61), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-20 07:07:53,876 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 202 transitions. [2021-11-20 07:07:53,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-20 07:07:53,878 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:07:53,878 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 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] [2021-11-20 07:07:53,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:07:54,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 07:07:54,102 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:07:54,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:07:54,102 INFO L85 PathProgramCache]: Analyzing trace with hash 150904329, now seen corresponding path program 2 times [2021-11-20 07:07:54,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:07:54,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161985741] [2021-11-20 07:07:54,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:07:54,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:07:54,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:54,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:07:54,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:54,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:07:54,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:54,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:07:54,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:54,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 07:07:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:54,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:07:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:54,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:07:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:54,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:07:54,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:54,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 07:07:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:54,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 07:07:54,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:54,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 07:07:54,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:54,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-20 07:07:54,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:07:54,687 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-20 07:07:54,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:07:54,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161985741] [2021-11-20 07:07:54,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161985741] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:07:54,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911992988] [2021-11-20 07:07:54,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:07:54,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:07:54,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:07:54,689 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:07:54,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 07:07:55,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:07:55,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:07:55,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 2587 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-20 07:07:55,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:07:57,411 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 38 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:07:57,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:07:58,086 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-20 07:07:58,087 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 26 [2021-11-20 07:07:58,182 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-20 07:07:58,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911992988] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:07:58,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:07:58,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 12] total 30 [2021-11-20 07:07:58,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784482594] [2021-11-20 07:07:58,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:07:58,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-20 07:07:58,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:07:58,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-20 07:07:58,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-11-20 07:07:58,185 INFO L87 Difference]: Start difference. First operand 155 states and 202 transitions. Second operand has 30 states, 30 states have (on average 4.4) internal successors, (132), 25 states have internal predecessors, (132), 10 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2021-11-20 07:08:02,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:02,145 INFO L93 Difference]: Finished difference Result 377 states and 518 transitions. [2021-11-20 07:08:02,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 07:08:02,146 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.4) internal successors, (132), 25 states have internal predecessors, (132), 10 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) Word has length 105 [2021-11-20 07:08:02,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:02,149 INFO L225 Difference]: With dead ends: 377 [2021-11-20 07:08:02,149 INFO L226 Difference]: Without dead ends: 255 [2021-11-20 07:08:02,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 211 SyntacticMatches, 10 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=266, Invalid=2284, Unknown=0, NotChecked=0, Total=2550 [2021-11-20 07:08:02,151 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 297 mSDsluCounter, 1908 mSDsCounter, 0 mSdLazyCounter, 2760 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 2128 SdHoareTripleChecker+Invalid, 3091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 2760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:02,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 2128 Invalid, 3091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 2760 Invalid, 0 Unknown, 172 Unchecked, 3.1s Time] [2021-11-20 07:08:02,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-11-20 07:08:02,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 198. [2021-11-20 07:08:02,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 142 states have (on average 1.176056338028169) internal successors, (167), 143 states have internal predecessors, (167), 39 states have call successors, (39), 14 states have call predecessors, (39), 16 states have return successors, (51), 40 states have call predecessors, (51), 38 states have call successors, (51) [2021-11-20 07:08:02,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 257 transitions. [2021-11-20 07:08:02,171 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 257 transitions. Word has length 105 [2021-11-20 07:08:02,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:02,171 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 257 transitions. [2021-11-20 07:08:02,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.4) internal successors, (132), 25 states have internal predecessors, (132), 10 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2021-11-20 07:08:02,172 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 257 transitions. [2021-11-20 07:08:02,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-20 07:08:02,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:02,174 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 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] [2021-11-20 07:08:02,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 07:08:02,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 07:08:02,394 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:08:02,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:02,394 INFO L85 PathProgramCache]: Analyzing trace with hash 568300935, now seen corresponding path program 1 times [2021-11-20 07:08:02,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:02,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825379586] [2021-11-20 07:08:02,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:02,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:02,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:02,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:08:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:02,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:08:02,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:02,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:08:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:02,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 07:08:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:02,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:08:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:02,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:08:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:02,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:08:02,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:02,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 07:08:02,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:03,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 07:08:03,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:03,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 07:08:03,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:03,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-20 07:08:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:03,068 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 07:08:03,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:03,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825379586] [2021-11-20 07:08:03,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825379586] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:08:03,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187269065] [2021-11-20 07:08:03,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:03,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:03,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:08:03,075 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:08:03,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 07:08:03,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:03,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 2582 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-20 07:08:03,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:08:03,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 07:08:04,300 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:08:04,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:08:04,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187269065] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:08:04,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:08:04,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 19 [2021-11-20 07:08:04,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209868691] [2021-11-20 07:08:04,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:08:04,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 07:08:04,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:04,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 07:08:04,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-20 07:08:04,303 INFO L87 Difference]: Start difference. First operand 198 states and 257 transitions. Second operand has 14 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 12 states have internal predecessors, (74), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-20 07:08:04,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:04,403 INFO L93 Difference]: Finished difference Result 362 states and 465 transitions. [2021-11-20 07:08:04,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:08:04,404 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 12 states have internal predecessors, (74), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 105 [2021-11-20 07:08:04,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:04,406 INFO L225 Difference]: With dead ends: 362 [2021-11-20 07:08:04,406 INFO L226 Difference]: Without dead ends: 225 [2021-11-20 07:08:04,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 117 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-20 07:08:04,408 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 29 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:04,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 994 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 54 Invalid, 0 Unknown, 80 Unchecked, 0.1s Time] [2021-11-20 07:08:04,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-11-20 07:08:04,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 220. [2021-11-20 07:08:04,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 160 states have (on average 1.1625) internal successors, (186), 163 states have internal predecessors, (186), 41 states have call successors, (41), 16 states have call predecessors, (41), 18 states have return successors, (54), 40 states have call predecessors, (54), 40 states have call successors, (54) [2021-11-20 07:08:04,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 281 transitions. [2021-11-20 07:08:04,452 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 281 transitions. Word has length 105 [2021-11-20 07:08:04,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:04,452 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 281 transitions. [2021-11-20 07:08:04,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 12 states have internal predecessors, (74), 6 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-20 07:08:04,453 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 281 transitions. [2021-11-20 07:08:04,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-20 07:08:04,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:04,455 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:08:04,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 07:08:04,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 07:08:04,674 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:08:04,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:04,674 INFO L85 PathProgramCache]: Analyzing trace with hash -374684294, now seen corresponding path program 1 times [2021-11-20 07:08:04,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:04,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062695534] [2021-11-20 07:08:04,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:04,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:04,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:04,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:08:04,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:05,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:08:05,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:05,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:08:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:05,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 07:08:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:05,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:08:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:05,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:08:05,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:05,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:08:05,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:05,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 07:08:05,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:05,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 07:08:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:05,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-20 07:08:05,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:05,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 07:08:05,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:05,313 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-20 07:08:05,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:05,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062695534] [2021-11-20 07:08:05,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062695534] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:08:05,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010994791] [2021-11-20 07:08:05,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:05,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:05,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:08:05,316 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:08:05,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 07:08:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:05,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 2586 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-20 07:08:05,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:08:05,981 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 07:08:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 42 proven. 28 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:08:07,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:08:08,175 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-20 07:08:08,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010994791] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:08:08,175 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:08:08,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 11] total 38 [2021-11-20 07:08:08,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478540060] [2021-11-20 07:08:08,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:08:08,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-20 07:08:08,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:08,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-20 07:08:08,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1295, Unknown=0, NotChecked=0, Total=1406 [2021-11-20 07:08:08,178 INFO L87 Difference]: Start difference. First operand 220 states and 281 transitions. Second operand has 38 states, 35 states have (on average 4.6) internal successors, (161), 33 states have internal predecessors, (161), 13 states have call successors, (33), 7 states have call predecessors, (33), 8 states have return successors, (29), 11 states have call predecessors, (29), 13 states have call successors, (29) [2021-11-20 07:08:14,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:14,254 INFO L93 Difference]: Finished difference Result 454 states and 600 transitions. [2021-11-20 07:08:14,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-20 07:08:14,255 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 4.6) internal successors, (161), 33 states have internal predecessors, (161), 13 states have call successors, (33), 7 states have call predecessors, (33), 8 states have return successors, (29), 11 states have call predecessors, (29), 13 states have call successors, (29) Word has length 111 [2021-11-20 07:08:14,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:14,257 INFO L225 Difference]: With dead ends: 454 [2021-11-20 07:08:14,258 INFO L226 Difference]: Without dead ends: 328 [2021-11-20 07:08:14,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 230 SyntacticMatches, 8 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1577 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=609, Invalid=5871, Unknown=0, NotChecked=0, Total=6480 [2021-11-20 07:08:14,262 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 305 mSDsluCounter, 1874 mSDsCounter, 0 mSdLazyCounter, 4294 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 2058 SdHoareTripleChecker+Invalid, 5074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 4294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 540 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:14,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 2058 Invalid, 5074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 4294 Invalid, 0 Unknown, 540 Unchecked, 4.4s Time] [2021-11-20 07:08:14,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-11-20 07:08:14,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 280. [2021-11-20 07:08:14,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 205 states have (on average 1.1560975609756097) internal successors, (237), 209 states have internal predecessors, (237), 52 states have call successors, (52), 19 states have call predecessors, (52), 22 states have return successors, (71), 51 states have call predecessors, (71), 51 states have call successors, (71) [2021-11-20 07:08:14,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 360 transitions. [2021-11-20 07:08:14,287 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 360 transitions. Word has length 111 [2021-11-20 07:08:14,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:14,287 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 360 transitions. [2021-11-20 07:08:14,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 4.6) internal successors, (161), 33 states have internal predecessors, (161), 13 states have call successors, (33), 7 states have call predecessors, (33), 8 states have return successors, (29), 11 states have call predecessors, (29), 13 states have call successors, (29) [2021-11-20 07:08:14,288 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 360 transitions. [2021-11-20 07:08:14,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 07:08:14,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:14,290 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 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] [2021-11-20 07:08:14,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 07:08:14,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:14,506 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:08:14,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:14,506 INFO L85 PathProgramCache]: Analyzing trace with hash -2056242484, now seen corresponding path program 1 times [2021-11-20 07:08:14,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:14,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687398928] [2021-11-20 07:08:14,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:14,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:15,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:08:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:15,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:08:15,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:15,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:08:15,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:15,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 07:08:15,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:15,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:08:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:15,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:08:15,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:15,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:08:15,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:15,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 07:08:15,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:15,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 07:08:15,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:15,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 07:08:15,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:15,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 07:08:15,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:15,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-20 07:08:15,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:15,511 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 07:08:15,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:15,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687398928] [2021-11-20 07:08:15,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687398928] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:08:15,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124671626] [2021-11-20 07:08:15,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:15,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:15,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:08:15,513 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:08:15,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 07:08:15,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:15,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 2608 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-20 07:08:15,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:08:16,193 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 18 treesize of output 14 [2021-11-20 07:08:20,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:08:20,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-11-20 07:08:22,763 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 41 treesize of output 26 [2021-11-20 07:08:22,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:08:22,779 INFO L354 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2021-11-20 07:08:22,779 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 26 treesize of output 18 [2021-11-20 07:08:24,207 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 41 proven. 46 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:08:24,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:08:25,105 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-20 07:08:25,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124671626] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:08:25,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:08:25,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 11] total 46 [2021-11-20 07:08:25,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413737991] [2021-11-20 07:08:25,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:08:25,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-20 07:08:25,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:25,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-20 07:08:25,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1923, Unknown=1, NotChecked=0, Total=2070 [2021-11-20 07:08:25,108 INFO L87 Difference]: Start difference. First operand 280 states and 360 transitions. Second operand has 46 states, 43 states have (on average 3.7209302325581395) internal successors, (160), 40 states have internal predecessors, (160), 16 states have call successors, (36), 7 states have call predecessors, (36), 9 states have return successors, (32), 15 states have call predecessors, (32), 15 states have call successors, (32) [2021-11-20 07:08:34,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:34,288 INFO L93 Difference]: Finished difference Result 481 states and 639 transitions. [2021-11-20 07:08:34,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-20 07:08:34,289 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 3.7209302325581395) internal successors, (160), 40 states have internal predecessors, (160), 16 states have call successors, (36), 7 states have call predecessors, (36), 9 states have return successors, (32), 15 states have call predecessors, (32), 15 states have call successors, (32) Word has length 112 [2021-11-20 07:08:34,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:34,292 INFO L225 Difference]: With dead ends: 481 [2021-11-20 07:08:34,292 INFO L226 Difference]: Without dead ends: 362 [2021-11-20 07:08:34,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 223 SyntacticMatches, 9 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=513, Invalid=5490, Unknown=3, NotChecked=0, Total=6006 [2021-11-20 07:08:34,295 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 420 mSDsluCounter, 2748 mSDsCounter, 0 mSdLazyCounter, 3577 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 2938 SdHoareTripleChecker+Invalid, 4653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 3577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 767 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:34,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 2938 Invalid, 4653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 3577 Invalid, 0 Unknown, 767 Unchecked, 3.7s Time] [2021-11-20 07:08:34,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-11-20 07:08:34,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 316. [2021-11-20 07:08:34,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 230 states have (on average 1.1608695652173913) internal successors, (267), 236 states have internal predecessors, (267), 61 states have call successors, (61), 19 states have call predecessors, (61), 24 states have return successors, (79), 60 states have call predecessors, (79), 60 states have call successors, (79) [2021-11-20 07:08:34,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 407 transitions. [2021-11-20 07:08:34,328 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 407 transitions. Word has length 112 [2021-11-20 07:08:34,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:34,329 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 407 transitions. [2021-11-20 07:08:34,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 3.7209302325581395) internal successors, (160), 40 states have internal predecessors, (160), 16 states have call successors, (36), 7 states have call predecessors, (36), 9 states have return successors, (32), 15 states have call predecessors, (32), 15 states have call successors, (32) [2021-11-20 07:08:34,330 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 407 transitions. [2021-11-20 07:08:34,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-20 07:08:34,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:34,332 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:08:34,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 07:08:34,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:34,558 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:08:34,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:34,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1217552706, now seen corresponding path program 1 times [2021-11-20 07:08:34,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:34,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528841326] [2021-11-20 07:08:34,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:34,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:34,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:35,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:08:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:35,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:08:35,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:35,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:08:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:35,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 07:08:35,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:35,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:08:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:35,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:08:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:35,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:08:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:35,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 07:08:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:35,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 07:08:35,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:35,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-20 07:08:35,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:35,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 07:08:35,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:35,348 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-20 07:08:35,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:35,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528841326] [2021-11-20 07:08:35,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528841326] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:08:35,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487992382] [2021-11-20 07:08:35,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:35,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:35,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:08:35,351 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:08:35,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 07:08:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:35,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 2588 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-20 07:08:35,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:08:36,211 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 07:08:37,580 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 46 proven. 32 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 07:08:37,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:08:38,526 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 34 [2021-11-20 07:08:39,034 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-20 07:08:39,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487992382] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:08:39,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:08:39,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 42 [2021-11-20 07:08:39,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603309027] [2021-11-20 07:08:39,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:08:39,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-20 07:08:39,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:39,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-20 07:08:39,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1578, Unknown=0, NotChecked=0, Total=1722 [2021-11-20 07:08:39,037 INFO L87 Difference]: Start difference. First operand 316 states and 407 transitions. Second operand has 42 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 33 states have internal predecessors, (147), 18 states have call successors, (34), 8 states have call predecessors, (34), 9 states have return successors, (31), 18 states have call predecessors, (31), 16 states have call successors, (31) [2021-11-20 07:08:43,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:43,484 INFO L93 Difference]: Finished difference Result 585 states and 773 transitions. [2021-11-20 07:08:43,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-20 07:08:43,485 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 33 states have internal predecessors, (147), 18 states have call successors, (34), 8 states have call predecessors, (34), 9 states have return successors, (31), 18 states have call predecessors, (31), 16 states have call successors, (31) Word has length 111 [2021-11-20 07:08:43,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:43,488 INFO L225 Difference]: With dead ends: 585 [2021-11-20 07:08:43,488 INFO L226 Difference]: Without dead ends: 367 [2021-11-20 07:08:43,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 210 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=431, Invalid=4681, Unknown=0, NotChecked=0, Total=5112 [2021-11-20 07:08:43,491 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 325 mSDsluCounter, 2178 mSDsCounter, 0 mSdLazyCounter, 2582 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 2365 SdHoareTripleChecker+Invalid, 3146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 2582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 359 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:43,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 2365 Invalid, 3146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 2582 Invalid, 0 Unknown, 359 Unchecked, 3.1s Time] [2021-11-20 07:08:43,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-11-20 07:08:43,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 326. [2021-11-20 07:08:43,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 238 states have (on average 1.1470588235294117) internal successors, (273), 245 states have internal predecessors, (273), 61 states have call successors, (61), 20 states have call predecessors, (61), 26 states have return successors, (79), 60 states have call predecessors, (79), 60 states have call successors, (79) [2021-11-20 07:08:43,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 413 transitions. [2021-11-20 07:08:43,524 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 413 transitions. Word has length 111 [2021-11-20 07:08:43,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:43,525 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 413 transitions. [2021-11-20 07:08:43,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 33 states have internal predecessors, (147), 18 states have call successors, (34), 8 states have call predecessors, (34), 9 states have return successors, (31), 18 states have call predecessors, (31), 16 states have call successors, (31) [2021-11-20 07:08:43,525 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 413 transitions. [2021-11-20 07:08:43,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-20 07:08:43,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:43,527 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:08:43,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 07:08:43,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 07:08:43,752 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:08:43,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:43,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1436407424, now seen corresponding path program 1 times [2021-11-20 07:08:43,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:43,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551439261] [2021-11-20 07:08:43,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:43,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:43,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:44,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:08:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:44,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:08:44,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:44,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:08:44,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:44,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 07:08:44,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:44,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:08:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:44,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:08:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:44,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:08:44,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:44,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 07:08:44,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:44,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 07:08:44,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:44,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-20 07:08:44,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:44,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 07:08:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 07:08:44,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:44,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551439261] [2021-11-20 07:08:44,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551439261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:08:44,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250096695] [2021-11-20 07:08:44,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:44,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:44,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:08:44,494 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:08:44,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 07:08:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:45,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 2593 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-20 07:08:45,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:08:45,230 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 07:08:46,256 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 73 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:08:46,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:08:47,039 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-20 07:08:47,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250096695] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:08:47,040 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:08:47,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 29 [2021-11-20 07:08:47,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292681970] [2021-11-20 07:08:47,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:08:47,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 07:08:47,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:47,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 07:08:47,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-11-20 07:08:47,042 INFO L87 Difference]: Start difference. First operand 326 states and 413 transitions. Second operand has 29 states, 27 states have (on average 5.333333333333333) internal successors, (144), 25 states have internal predecessors, (144), 10 states have call successors, (27), 6 states have call predecessors, (27), 7 states have return successors, (23), 9 states have call predecessors, (23), 10 states have call successors, (23) [2021-11-20 07:08:51,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:51,233 INFO L93 Difference]: Finished difference Result 611 states and 804 transitions. [2021-11-20 07:08:51,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 07:08:51,234 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 5.333333333333333) internal successors, (144), 25 states have internal predecessors, (144), 10 states have call successors, (27), 6 states have call predecessors, (27), 7 states have return successors, (23), 9 states have call predecessors, (23), 10 states have call successors, (23) Word has length 111 [2021-11-20 07:08:51,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:51,237 INFO L225 Difference]: With dead ends: 611 [2021-11-20 07:08:51,238 INFO L226 Difference]: Without dead ends: 423 [2021-11-20 07:08:51,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 231 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=299, Invalid=2251, Unknown=0, NotChecked=0, Total=2550 [2021-11-20 07:08:51,240 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 389 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 2794 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 1883 SdHoareTripleChecker+Invalid, 3855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 2794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 867 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:51,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 1883 Invalid, 3855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 2794 Invalid, 0 Unknown, 867 Unchecked, 3.5s Time] [2021-11-20 07:08:51,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-11-20 07:08:51,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 366. [2021-11-20 07:08:51,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 268 states have (on average 1.1604477611940298) internal successors, (311), 275 states have internal predecessors, (311), 71 states have call successors, (71), 20 states have call predecessors, (71), 26 states have return successors, (89), 70 states have call predecessors, (89), 70 states have call successors, (89) [2021-11-20 07:08:51,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 471 transitions. [2021-11-20 07:08:51,291 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 471 transitions. Word has length 111 [2021-11-20 07:08:51,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:51,292 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 471 transitions. [2021-11-20 07:08:51,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 5.333333333333333) internal successors, (144), 25 states have internal predecessors, (144), 10 states have call successors, (27), 6 states have call predecessors, (27), 7 states have return successors, (23), 9 states have call predecessors, (23), 10 states have call successors, (23) [2021-11-20 07:08:51,293 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 471 transitions. [2021-11-20 07:08:51,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-20 07:08:51,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:51,295 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:08:51,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 07:08:51,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 07:08:51,522 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:08:51,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:51,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1012760702, now seen corresponding path program 1 times [2021-11-20 07:08:51,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:51,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883789175] [2021-11-20 07:08:51,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:51,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:51,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:08:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:51,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:08:51,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:51,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:08:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:51,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 07:08:51,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:51,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:08:51,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:51,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:08:51,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:51,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:08:51,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:51,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 07:08:51,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:51,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 07:08:51,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:51,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-20 07:08:51,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:51,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 07:08:51,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-20 07:08:52,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:52,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883789175] [2021-11-20 07:08:52,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883789175] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:08:52,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295336232] [2021-11-20 07:08:52,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:52,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:52,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:08:52,098 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:08:52,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 07:08:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:08:52,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 2588 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-20 07:08:52,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:08:52,750 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 07:08:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 47 proven. 23 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:08:54,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:08:55,090 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-20 07:08:55,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295336232] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:08:55,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:08:55,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 13] total 35 [2021-11-20 07:08:55,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099590426] [2021-11-20 07:08:55,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:08:55,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-20 07:08:55,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:55,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-20 07:08:55,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 07:08:55,094 INFO L87 Difference]: Start difference. First operand 366 states and 471 transitions. Second operand has 35 states, 35 states have (on average 4.428571428571429) internal successors, (155), 32 states have internal predecessors, (155), 9 states have call successors, (30), 6 states have call predecessors, (30), 7 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) [2021-11-20 07:09:01,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:09:01,109 INFO L93 Difference]: Finished difference Result 619 states and 802 transitions. [2021-11-20 07:09:01,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-20 07:09:01,110 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.428571428571429) internal successors, (155), 32 states have internal predecessors, (155), 9 states have call successors, (30), 6 states have call predecessors, (30), 7 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) Word has length 111 [2021-11-20 07:09:01,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:09:01,115 INFO L225 Difference]: With dead ends: 619 [2021-11-20 07:09:01,115 INFO L226 Difference]: Without dead ends: 448 [2021-11-20 07:09:01,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 218 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=618, Invalid=3938, Unknown=0, NotChecked=0, Total=4556 [2021-11-20 07:09:01,120 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 286 mSDsluCounter, 2367 mSDsCounter, 0 mSdLazyCounter, 2650 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 2571 SdHoareTripleChecker+Invalid, 3432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 2650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 661 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:09:01,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 2571 Invalid, 3432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 2650 Invalid, 0 Unknown, 661 Unchecked, 3.7s Time] [2021-11-20 07:09:01,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-11-20 07:09:01,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 383. [2021-11-20 07:09:01,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 284 states have (on average 1.1514084507042253) internal successors, (327), 291 states have internal predecessors, (327), 71 states have call successors, (71), 21 states have call predecessors, (71), 27 states have return successors, (89), 70 states have call predecessors, (89), 70 states have call successors, (89) [2021-11-20 07:09:01,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 487 transitions. [2021-11-20 07:09:01,171 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 487 transitions. Word has length 111 [2021-11-20 07:09:01,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:09:01,171 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 487 transitions. [2021-11-20 07:09:01,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.428571428571429) internal successors, (155), 32 states have internal predecessors, (155), 9 states have call successors, (30), 6 states have call predecessors, (30), 7 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) [2021-11-20 07:09:01,172 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 487 transitions. [2021-11-20 07:09:01,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-20 07:09:01,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:09:01,175 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:09:01,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 07:09:01,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:09:01,394 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:09:01,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:09:01,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1270926140, now seen corresponding path program 1 times [2021-11-20 07:09:01,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:09:01,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796588797] [2021-11-20 07:09:01,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:09:01,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:09:01,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:01,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:09:01,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:01,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:09:01,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:01,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:09:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:01,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 07:09:01,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:01,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:09:01,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:01,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:09:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:01,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:09:01,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:01,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 07:09:01,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:01,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 07:09:01,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:01,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-20 07:09:01,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:01,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 07:09:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-20 07:09:01,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:09:01,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796588797] [2021-11-20 07:09:01,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796588797] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:09:01,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:09:01,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:09:01,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453776909] [2021-11-20 07:09:01,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:09:01,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:09:01,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:09:01,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:09:01,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:09:01,713 INFO L87 Difference]: Start difference. First operand 383 states and 487 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-20 07:09:02,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:09:02,291 INFO L93 Difference]: Finished difference Result 599 states and 782 transitions. [2021-11-20 07:09:02,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:09:02,292 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 111 [2021-11-20 07:09:02,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:09:02,295 INFO L225 Difference]: With dead ends: 599 [2021-11-20 07:09:02,295 INFO L226 Difference]: Without dead ends: 384 [2021-11-20 07:09:02,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:09:02,298 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 92 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:09:02,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 365 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 07:09:02,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-11-20 07:09:02,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 374. [2021-11-20 07:09:02,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 276 states have (on average 1.1376811594202898) internal successors, (314), 282 states have internal predecessors, (314), 71 states have call successors, (71), 21 states have call predecessors, (71), 26 states have return successors, (87), 70 states have call predecessors, (87), 70 states have call successors, (87) [2021-11-20 07:09:02,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 472 transitions. [2021-11-20 07:09:02,337 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 472 transitions. Word has length 111 [2021-11-20 07:09:02,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:09:02,338 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 472 transitions. [2021-11-20 07:09:02,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-20 07:09:02,338 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 472 transitions. [2021-11-20 07:09:02,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-20 07:09:02,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:09:02,340 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:09:02,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 07:09:02,340 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:09:02,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:09:02,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1395663453, now seen corresponding path program 1 times [2021-11-20 07:09:02,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:09:02,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279265801] [2021-11-20 07:09:02,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:09:02,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:09:02,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:02,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:09:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:02,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:09:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:02,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:09:02,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:02,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 07:09:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:02,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:09:02,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:02,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:09:02,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:02,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:09:02,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:02,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 07:09:02,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:02,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 07:09:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:02,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-20 07:09:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:02,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 07:09:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:02,669 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-20 07:09:02,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:09:02,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279265801] [2021-11-20 07:09:02,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279265801] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:09:02,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:09:02,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-20 07:09:02,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372798962] [2021-11-20 07:09:02,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:09:02,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:09:02,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:09:02,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:09:02,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:09:02,673 INFO L87 Difference]: Start difference. First operand 374 states and 472 transitions. Second operand has 11 states, 10 states have (on average 4.8) internal successors, (48), 8 states have internal predecessors, (48), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-20 07:09:04,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:09:04,096 INFO L93 Difference]: Finished difference Result 390 states and 490 transitions. [2021-11-20 07:09:04,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:09:04,097 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 8 states have internal predecessors, (48), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 113 [2021-11-20 07:09:04,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:09:04,099 INFO L225 Difference]: With dead ends: 390 [2021-11-20 07:09:04,100 INFO L226 Difference]: Without dead ends: 388 [2021-11-20 07:09:04,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:09:04,101 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 89 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:09:04,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 948 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 07:09:04,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-11-20 07:09:04,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 379. [2021-11-20 07:09:04,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 279 states have (on average 1.136200716845878) internal successors, (317), 285 states have internal predecessors, (317), 72 states have call successors, (72), 22 states have call predecessors, (72), 27 states have return successors, (88), 71 states have call predecessors, (88), 71 states have call successors, (88) [2021-11-20 07:09:04,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 477 transitions. [2021-11-20 07:09:04,147 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 477 transitions. Word has length 113 [2021-11-20 07:09:04,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:09:04,147 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 477 transitions. [2021-11-20 07:09:04,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 8 states have internal predecessors, (48), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-20 07:09:04,148 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 477 transitions. [2021-11-20 07:09:04,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-20 07:09:04,150 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:09:04,150 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:09:04,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-20 07:09:04,151 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:09:04,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:09:04,151 INFO L85 PathProgramCache]: Analyzing trace with hash -636491906, now seen corresponding path program 1 times [2021-11-20 07:09:04,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:09:04,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305697715] [2021-11-20 07:09:04,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:09:04,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:09:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:04,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:09:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:04,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:09:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:04,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:09:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:04,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 07:09:04,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:04,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:09:04,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:04,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:09:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:04,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:09:04,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:04,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 07:09:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:04,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 07:09:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:04,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-20 07:09:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:04,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 07:09:04,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:04,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-20 07:09:04,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-20 07:09:04,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:09:04,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305697715] [2021-11-20 07:09:04,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305697715] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:09:04,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:09:04,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 07:09:04,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961616934] [2021-11-20 07:09:04,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:09:04,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:09:04,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:09:04,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:09:04,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:09:04,534 INFO L87 Difference]: Start difference. First operand 379 states and 477 transitions. Second operand has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-20 07:09:05,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:09:05,726 INFO L93 Difference]: Finished difference Result 403 states and 507 transitions. [2021-11-20 07:09:05,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:09:05,727 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 114 [2021-11-20 07:09:05,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:09:05,730 INFO L225 Difference]: With dead ends: 403 [2021-11-20 07:09:05,731 INFO L226 Difference]: Without dead ends: 401 [2021-11-20 07:09:05,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:09:05,732 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 142 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:09:05,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 747 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 07:09:05,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-11-20 07:09:05,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 389. [2021-11-20 07:09:05,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 285 states have (on average 1.1333333333333333) internal successors, (323), 292 states have internal predecessors, (323), 74 states have call successors, (74), 23 states have call predecessors, (74), 29 states have return successors, (93), 73 states have call predecessors, (93), 73 states have call successors, (93) [2021-11-20 07:09:05,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 490 transitions. [2021-11-20 07:09:05,770 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 490 transitions. Word has length 114 [2021-11-20 07:09:05,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:09:05,770 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 490 transitions. [2021-11-20 07:09:05,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-20 07:09:05,771 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 490 transitions. [2021-11-20 07:09:05,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-20 07:09:05,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:09:05,774 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:09:05,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-20 07:09:05,775 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:09:05,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:09:05,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1717649095, now seen corresponding path program 1 times [2021-11-20 07:09:05,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:09:05,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026964572] [2021-11-20 07:09:05,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:09:05,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:09:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:07,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:09:07,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:07,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:09:07,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:07,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:09:07,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:07,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 07:09:07,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:07,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:09:07,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:07,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 07:09:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:07,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:09:07,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:07,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 07:09:07,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:07,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 07:09:07,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:08,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 07:09:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:08,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-20 07:09:08,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:08,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-20 07:09:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:08,460 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 36 proven. 26 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-20 07:09:08,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:09:08,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026964572] [2021-11-20 07:09:08,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026964572] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:09:08,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092158841] [2021-11-20 07:09:08,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:09:08,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:09:08,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:09:08,462 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:09:08,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75045b8e-d9bb-4f38-b075-183cb686fabb/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 07:09:08,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:08,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 2614 conjuncts, 105 conjunts are in the unsatisfiable core [2021-11-20 07:09:08,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:09:09,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:09,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 23 [2021-11-20 07:09:10,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:10,776 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 07:09:10,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 51 [2021-11-20 07:09:11,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:11,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:12,021 INFO L354 Elim1Store]: treesize reduction 172, result has 20.7 percent of original size [2021-11-20 07:09:12,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 14 case distinctions, treesize of input 184 treesize of output 206 [2021-11-20 07:09:13,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:13,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:13,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:13,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:13,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:13,066 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:09:13,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 72 treesize of output 41 [2021-11-20 07:09:13,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:13,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:13,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:13,515 INFO L354 Elim1Store]: treesize reduction 103, result has 12.0 percent of original size [2021-11-20 07:09:13,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 83 treesize of output 65 [2021-11-20 07:09:42,074 INFO L354 Elim1Store]: treesize reduction 14, result has 78.5 percent of original size [2021-11-20 07:09:42,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 166 treesize of output 158