./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL --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 21e14c4abf3c8c626ff1e4d64bac7246a96ab8c19ab8b6f263006a7e1f8fc191 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:51:46,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:51:46,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:51:46,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:51:46,171 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:51:46,175 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:51:46,177 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:51:46,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:51:46,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:51:46,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:51:46,190 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:51:46,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:51:46,192 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:51:46,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:51:46,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:51:46,203 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:51:46,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:51:46,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:51:46,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:51:46,216 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:51:46,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:51:46,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:51:46,223 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:51:46,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:51:46,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:51:46,233 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:51:46,233 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:51:46,236 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:51:46,236 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:51:46,238 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:51:46,239 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:51:46,239 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:51:46,241 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:51:46,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:51:46,244 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:51:46,244 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:51:46,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:51:46,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:51:46,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:51:46,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:51:46,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:51:46,248 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-19 04:51:46,285 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:51:46,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:51:46,286 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:51:46,286 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:51:46,287 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:51:46,287 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:51:46,287 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:51:46,288 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:51:46,288 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:51:46,288 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:51:46,288 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:51:46,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:51:46,289 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:51:46,289 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:51:46,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:51:46,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:51:46,290 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:51:46,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:51:46,290 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:51:46,290 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:51:46,291 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:51:46,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:51:46,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:51:46,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:51:46,292 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:51:46,292 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:51:46,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:51:46,292 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:51:46,292 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:51:46,293 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:51:46,293 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:51:46,293 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_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21e14c4abf3c8c626ff1e4d64bac7246a96ab8c19ab8b6f263006a7e1f8fc191 [2021-11-19 04:51:46,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:51:46,618 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:51:46,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:51:46,622 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:51:46,623 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:51:46,625 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i [2021-11-19 04:51:46,685 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/data/b2d32f124/8a11a86e45ef4633a89cc10e1f891f8d/FLAGf32d1c552 [2021-11-19 04:51:47,597 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:51:47,597 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i [2021-11-19 04:51:47,651 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/data/b2d32f124/8a11a86e45ef4633a89cc10e1f891f8d/FLAGf32d1c552 [2021-11-19 04:51:47,986 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/data/b2d32f124/8a11a86e45ef4633a89cc10e1f891f8d [2021-11-19 04:51:47,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:51:47,989 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:51:47,990 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:51:47,991 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:51:47,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:51:48,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:51:47" (1/1) ... [2021-11-19 04:51:48,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27b5172e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:48, skipping insertion in model container [2021-11-19 04:51:48,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:51:47" (1/1) ... [2021-11-19 04:51:48,008 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:51:48,129 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:51:48,393 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_4154d12e-108a-49a9-8557-d013d7d37101/sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i[4504,4517] [2021-11-19 04:51:48,405 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_4154d12e-108a-49a9-8557-d013d7d37101/sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i[4564,4577] [2021-11-19 04:51:48,436 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 04:51:48,446 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 04:51:49,609 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:51:49,610 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:51:49,611 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:51:49,612 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:51:49,613 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:51:49,628 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:51:49,628 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:51:49,631 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:51:49,631 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:51:50,067 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 04:51:50,068 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 04:51:50,070 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 04:51:50,071 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 04:51:50,073 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 04:51:50,073 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 04:51:50,074 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 04:51:50,075 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 04:51:50,076 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 04:51:50,076 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 04:51:50,258 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 04:51:50,393 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:51:50,398 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:51:50,536 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:51:50,630 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:51:50,662 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_4154d12e-108a-49a9-8557-d013d7d37101/sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i[4504,4517] [2021-11-19 04:51:50,669 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_4154d12e-108a-49a9-8557-d013d7d37101/sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i[4564,4577] [2021-11-19 04:51:50,671 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 04:51:50,673 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 04:51:50,727 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:51:50,728 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:51:50,731 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:51:50,732 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:51:50,741 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:51:50,753 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:51:50,765 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:51:50,767 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:51:50,767 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:51:50,805 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 04:51:50,806 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 04:51:50,807 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 04:51:50,807 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 04:51:50,809 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 04:51:50,809 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 04:51:50,810 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 04:51:50,810 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 04:51:50,811 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 04:51:50,811 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 04:51:50,834 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 04:51:50,965 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:51:50,966 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 04:51:51,006 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:51:51,319 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:51:51,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:51 WrapperNode [2021-11-19 04:51:51,320 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:51:51,321 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:51:51,321 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:51:51,321 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:51:51,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:51" (1/1) ... [2021-11-19 04:51:51,546 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:51" (1/1) ... [2021-11-19 04:51:51,667 INFO L137 Inliner]: procedures = 692, calls = 2616, calls flagged for inlining = 62, calls inlined = 9, statements flattened = 807 [2021-11-19 04:51:51,668 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:51:51,669 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:51:51,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:51:51,670 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:51:51,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:51" (1/1) ... [2021-11-19 04:51:51,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:51" (1/1) ... [2021-11-19 04:51:51,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:51" (1/1) ... [2021-11-19 04:51:51,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:51" (1/1) ... [2021-11-19 04:51:51,765 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:51" (1/1) ... [2021-11-19 04:51:51,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:51" (1/1) ... [2021-11-19 04:51:51,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:51" (1/1) ... [2021-11-19 04:51:51,814 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:51:51,815 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:51:51,815 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:51:51,815 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:51:51,817 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:51" (1/1) ... [2021-11-19 04:51:51,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:51:51,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:51:51,859 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:51:51,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:51:51,917 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-11-19 04:51:51,917 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-11-19 04:51:51,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 04:51:51,918 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-19 04:51:51,918 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-19 04:51:51,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 04:51:51,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 04:51:51,920 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 04:51:51,921 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_left_trim_pred [2021-11-19 04:51:51,921 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_left_trim_pred [2021-11-19 04:51:51,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 04:51:51,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:51:51,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 04:51:51,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:51:51,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:51:51,922 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-19 04:51:51,923 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-19 04:51:51,923 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-19 04:51:51,923 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-19 04:51:51,923 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 04:51:51,923 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 04:51:51,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 04:51:51,924 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 04:51:51,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 04:51:51,924 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~uint8_t~0~TO~int [2021-11-19 04:51:51,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~uint8_t~0~TO~int [2021-11-19 04:51:51,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 04:51:51,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:51:52,147 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:51:52,149 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:51:54,108 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:51:54,116 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:51:54,116 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 04:51:54,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:51:54 BoogieIcfgContainer [2021-11-19 04:51:54,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:51:54,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:51:54,120 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:51:54,124 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:51:54,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:51:47" (1/3) ... [2021-11-19 04:51:54,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3afb09af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:51:54, skipping insertion in model container [2021-11-19 04:51:54,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:51" (2/3) ... [2021-11-19 04:51:54,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3afb09af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:51:54, skipping insertion in model container [2021-11-19 04:51:54,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:51:54" (3/3) ... [2021-11-19 04:51:54,127 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_satisfies_pred_harness.i [2021-11-19 04:51:54,132 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:51:54,132 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 04:51:54,179 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:51:54,186 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 [2021-11-19 04:51:54,186 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 04:51:54,205 INFO L276 IsEmpty]: Start isEmpty. Operand has 96 states, 64 states have (on average 1.234375) internal successors, (79), 65 states have internal predecessors, (79), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-19 04:51:54,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 04:51:54,213 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:54,214 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:51:54,214 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:54,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:54,220 INFO L85 PathProgramCache]: Analyzing trace with hash 843534149, now seen corresponding path program 1 times [2021-11-19 04:51:54,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:54,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400613253] [2021-11-19 04:51:54,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:54,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:54,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:54,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:51:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:54,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:51:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:54,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:51:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:54,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-19 04:51:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:54,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 04:51:54,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:54,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-19 04:51:54,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:54,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:51:54,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:54,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 04:51:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 04:51:55,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:55,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400613253] [2021-11-19 04:51:55,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400613253] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:55,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:55,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 04:51:55,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325794249] [2021-11-19 04:51:55,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:55,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 04:51:55,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:55,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 04:51:55,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 04:51:55,060 INFO L87 Difference]: Start difference. First operand has 96 states, 64 states have (on average 1.234375) internal successors, (79), 65 states have internal predecessors, (79), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 04:51:55,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:55,120 INFO L93 Difference]: Finished difference Result 188 states and 255 transitions. [2021-11-19 04:51:55,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 04:51:55,123 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2021-11-19 04:51:55,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:55,132 INFO L225 Difference]: With dead ends: 188 [2021-11-19 04:51:55,132 INFO L226 Difference]: Without dead ends: 87 [2021-11-19 04:51:55,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 04:51:55,140 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:55,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:51:55,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-19 04:51:55,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-11-19 04:51:55,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 58 states have internal predecessors, (67), 22 states have call successors, (22), 8 states have call predecessors, (22), 7 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-19 04:51:55,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2021-11-19 04:51:55,191 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 61 [2021-11-19 04:51:55,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:55,191 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2021-11-19 04:51:55,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 04:51:55,192 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2021-11-19 04:51:55,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-19 04:51:55,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:55,199 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:51:55,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:51:55,199 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:55,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:55,200 INFO L85 PathProgramCache]: Analyzing trace with hash -2126644258, now seen corresponding path program 1 times [2021-11-19 04:51:55,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:55,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139469385] [2021-11-19 04:51:55,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:55,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:55,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:55,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:51:55,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:55,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:51:55,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:55,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:51:55,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:55,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-19 04:51:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:55,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 04:51:55,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:55,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-19 04:51:55,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:55,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:51:55,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:55,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-19 04:51:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:55,665 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 04:51:55,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:55,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139469385] [2021-11-19 04:51:55,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139469385] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:51:55,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594037141] [2021-11-19 04:51:55,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:55,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:51:55,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:51:55,671 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:51:55,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:51:56,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:56,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 2470 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 04:51:56,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:51:56,592 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 04:51:56,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:51:56,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594037141] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:56,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:51:56,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2021-11-19 04:51:56,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382515633] [2021-11-19 04:51:56,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:56,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:51:56,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:56,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:51:56,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:51:56,597 INFO L87 Difference]: Start difference. First operand 87 states and 109 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 04:51:56,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:56,815 INFO L93 Difference]: Finished difference Result 157 states and 202 transitions. [2021-11-19 04:51:56,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:51:56,816 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 63 [2021-11-19 04:51:56,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:56,822 INFO L225 Difference]: With dead ends: 157 [2021-11-19 04:51:56,823 INFO L226 Difference]: Without dead ends: 90 [2021-11-19 04:51:56,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:51:56,834 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 126 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:56,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 300 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:51:56,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-19 04:51:56,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-19 04:51:56,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 61 states have internal predecessors, (69), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) [2021-11-19 04:51:56,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2021-11-19 04:51:56,867 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 63 [2021-11-19 04:51:56,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:56,868 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2021-11-19 04:51:56,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 04:51:56,868 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2021-11-19 04:51:56,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-19 04:51:56,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:56,875 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:51:56,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:51:57,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:51:57,094 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:57,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:57,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1088384551, now seen corresponding path program 1 times [2021-11-19 04:51:57,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:57,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693032209] [2021-11-19 04:51:57,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:57,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:57,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:57,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:51:57,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:57,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:51:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:57,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:51:57,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:57,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-19 04:51:57,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:57,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 04:51:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:57,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-19 04:51:57,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:57,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 04:51:57,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:57,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-19 04:51:57,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 04:51:57,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:57,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693032209] [2021-11-19 04:51:57,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693032209] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:51:57,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421498309] [2021-11-19 04:51:57,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:57,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:51:57,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:51:57,532 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:51:57,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:51:58,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:58,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 2475 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 04:51:58,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:51:58,404 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 04:51:58,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:51:58,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421498309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:58,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:51:58,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2021-11-19 04:51:58,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140812156] [2021-11-19 04:51:58,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:58,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:51:58,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:58,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:51:58,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:51:58,407 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:51:58,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:58,737 INFO L93 Difference]: Finished difference Result 150 states and 191 transitions. [2021-11-19 04:51:58,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:51:58,738 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 65 [2021-11-19 04:51:58,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:58,740 INFO L225 Difference]: With dead ends: 150 [2021-11-19 04:51:58,740 INFO L226 Difference]: Without dead ends: 90 [2021-11-19 04:51:58,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-11-19 04:51:58,742 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 143 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:58,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 489 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:51:58,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-19 04:51:58,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-19 04:51:58,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 61 states have internal predecessors, (69), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2021-11-19 04:51:58,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2021-11-19 04:51:58,756 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 65 [2021-11-19 04:51:58,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:58,756 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2021-11-19 04:51:58,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:51:58,757 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2021-11-19 04:51:58,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-19 04:51:58,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:58,759 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:51:58,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:51:58,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:51:58,980 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:58,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:58,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1116444153, now seen corresponding path program 1 times [2021-11-19 04:51:58,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:58,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626051411] [2021-11-19 04:51:58,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:58,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:59,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:59,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:51:59,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:59,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:51:59,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:59,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:51:59,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:59,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-19 04:51:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:59,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 04:51:59,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:59,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-19 04:51:59,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:59,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-19 04:51:59,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:59,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 04:51:59,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:51:59,422 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 04:51:59,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:51:59,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626051411] [2021-11-19 04:51:59,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626051411] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:51:59,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:51:59,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:51:59,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148318661] [2021-11-19 04:51:59,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:51:59,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:51:59,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:51:59,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:51:59,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:51:59,427 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-19 04:51:59,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:51:59,542 INFO L93 Difference]: Finished difference Result 102 states and 129 transitions. [2021-11-19 04:51:59,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:51:59,543 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 69 [2021-11-19 04:51:59,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:51:59,545 INFO L225 Difference]: With dead ends: 102 [2021-11-19 04:51:59,545 INFO L226 Difference]: Without dead ends: 100 [2021-11-19 04:51:59,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:51:59,546 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 16 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:51:59,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 728 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:51:59,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-19 04:51:59,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-11-19 04:51:59,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 68 states have internal predecessors, (75), 23 states have call successors, (23), 9 states have call predecessors, (23), 10 states have return successors, (28), 21 states have call predecessors, (28), 21 states have call successors, (28) [2021-11-19 04:51:59,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2021-11-19 04:51:59,559 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 69 [2021-11-19 04:51:59,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:51:59,559 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2021-11-19 04:51:59,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-19 04:51:59,560 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2021-11-19 04:51:59,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-19 04:51:59,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:51:59,562 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:51:59,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 04:51:59,562 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:51:59,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:51:59,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1585986623, now seen corresponding path program 1 times [2021-11-19 04:51:59,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:51:59,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140417892] [2021-11-19 04:51:59,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:51:59,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:51:59,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:00,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:00,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:52:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:00,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:52:00,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:00,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-19 04:52:00,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:00,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 04:52:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:00,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-19 04:52:00,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:00,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-19 04:52:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:00,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 04:52:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 04:52:00,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:00,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140417892] [2021-11-19 04:52:00,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140417892] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:00,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668368199] [2021-11-19 04:52:00,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:00,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:00,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:00,460 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:52:00,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:52:00,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:00,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 2497 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-19 04:52:00,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:01,135 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 [2021-11-19 04:52:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 04:52:02,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:52:03,427 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 04:52:03,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668368199] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:52:03,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:52:03,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 12] total 27 [2021-11-19 04:52:03,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650046533] [2021-11-19 04:52:03,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:52:03,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-19 04:52:03,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:03,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-19 04:52:03,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-11-19 04:52:03,430 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand has 27 states, 25 states have (on average 3.56) internal successors, (89), 25 states have internal predecessors, (89), 10 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-19 04:52:04,926 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:52:07,407 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:52:09,486 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:52:11,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:11,597 INFO L93 Difference]: Finished difference Result 293 states and 413 transitions. [2021-11-19 04:52:11,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 04:52:11,598 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.56) internal successors, (89), 25 states have internal predecessors, (89), 10 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 73 [2021-11-19 04:52:11,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:11,603 INFO L225 Difference]: With dead ends: 293 [2021-11-19 04:52:11,603 INFO L226 Difference]: Without dead ends: 214 [2021-11-19 04:52:11,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 139 SyntacticMatches, 12 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=213, Invalid=1427, Unknown=0, NotChecked=0, Total=1640 [2021-11-19 04:52:11,605 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 161 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 71 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 1563 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 373 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:11,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 1563 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 740 Invalid, 2 Unknown, 373 Unchecked, 7.5s Time] [2021-11-19 04:52:11,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-19 04:52:11,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 150. [2021-11-19 04:52:11,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 106 states have internal predecessors, (118), 34 states have call successors, (34), 12 states have call predecessors, (34), 14 states have return successors, (49), 31 states have call predecessors, (49), 32 states have call successors, (49) [2021-11-19 04:52:11,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 201 transitions. [2021-11-19 04:52:11,634 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 201 transitions. Word has length 73 [2021-11-19 04:52:11,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:11,634 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 201 transitions. [2021-11-19 04:52:11,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.56) internal successors, (89), 25 states have internal predecessors, (89), 10 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-19 04:52:11,635 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 201 transitions. [2021-11-19 04:52:11,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-19 04:52:11,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:11,637 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:11,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 04:52:11,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:11,860 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:11,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:11,861 INFO L85 PathProgramCache]: Analyzing trace with hash 999277960, now seen corresponding path program 1 times [2021-11-19 04:52:11,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:11,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409502945] [2021-11-19 04:52:11,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:11,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:12,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:12,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:52:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:12,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:52:12,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:12,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-19 04:52:12,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:12,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 04:52:12,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:12,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-19 04:52:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:12,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-19 04:52:12,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:12,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 04:52:12,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:12,394 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 04:52:12,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:12,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409502945] [2021-11-19 04:52:12,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409502945] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:12,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:12,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-19 04:52:12,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548805223] [2021-11-19 04:52:12,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:12,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 04:52:12,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:12,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 04:52:12,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:52:12,397 INFO L87 Difference]: Start difference. First operand 150 states and 201 transitions. Second operand has 13 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-19 04:52:13,717 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:52:15,321 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:52:15,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:15,799 INFO L93 Difference]: Finished difference Result 158 states and 209 transitions. [2021-11-19 04:52:15,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 04:52:15,800 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 75 [2021-11-19 04:52:15,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:15,803 INFO L225 Difference]: With dead ends: 158 [2021-11-19 04:52:15,803 INFO L226 Difference]: Without dead ends: 156 [2021-11-19 04:52:15,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-11-19 04:52:15,805 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 35 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:15,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 1135 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-19 04:52:15,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-19 04:52:15,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 150. [2021-11-19 04:52:15,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 106 states have internal predecessors, (118), 34 states have call successors, (34), 12 states have call predecessors, (34), 14 states have return successors, (49), 31 states have call predecessors, (49), 32 states have call successors, (49) [2021-11-19 04:52:15,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 201 transitions. [2021-11-19 04:52:15,828 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 201 transitions. Word has length 75 [2021-11-19 04:52:15,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:15,829 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 201 transitions. [2021-11-19 04:52:15,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-19 04:52:15,830 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 201 transitions. [2021-11-19 04:52:15,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-19 04:52:15,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:15,832 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-19 04:52:15,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 04:52:15,833 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:15,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:15,833 INFO L85 PathProgramCache]: Analyzing trace with hash 490092965, now seen corresponding path program 1 times [2021-11-19 04:52:15,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:15,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532392729] [2021-11-19 04:52:15,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:15,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:15,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:15,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:15,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:52:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:16,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:52:16,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:16,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-19 04:52:16,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:16,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-19 04:52:16,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:16,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 04:52:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:16,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-19 04:52:16,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:16,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-19 04:52:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-19 04:52:16,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:16,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532392729] [2021-11-19 04:52:16,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532392729] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:16,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:16,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:52:16,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108739313] [2021-11-19 04:52:16,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:16,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:52:16,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:16,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:52:16,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:52:16,076 INFO L87 Difference]: Start difference. First operand 150 states and 201 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 04:52:16,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:16,101 INFO L93 Difference]: Finished difference Result 219 states and 293 transitions. [2021-11-19 04:52:16,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:52:16,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 80 [2021-11-19 04:52:16,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:16,109 INFO L225 Difference]: With dead ends: 219 [2021-11-19 04:52:16,109 INFO L226 Difference]: Without dead ends: 153 [2021-11-19 04:52:16,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:52:16,111 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 0 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:16,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 211 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:52:16,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-19 04:52:16,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-11-19 04:52:16,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 109 states have internal predecessors, (121), 34 states have call successors, (34), 12 states have call predecessors, (34), 14 states have return successors, (49), 31 states have call predecessors, (49), 32 states have call successors, (49) [2021-11-19 04:52:16,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 204 transitions. [2021-11-19 04:52:16,145 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 204 transitions. Word has length 80 [2021-11-19 04:52:16,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:16,146 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 204 transitions. [2021-11-19 04:52:16,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 04:52:16,146 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 204 transitions. [2021-11-19 04:52:16,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 04:52:16,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:16,150 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:16,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 04:52:16,150 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:16,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:16,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1225398278, now seen corresponding path program 1 times [2021-11-19 04:52:16,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:16,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3102801] [2021-11-19 04:52:16,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:16,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:16,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:16,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:52:16,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:16,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:52:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:16,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-19 04:52:16,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:16,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-19 04:52:16,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:16,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 04:52:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:16,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-19 04:52:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:16,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-19 04:52:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:16,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-19 04:52:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:16,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-19 04:52:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-19 04:52:16,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:16,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3102801] [2021-11-19 04:52:16,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3102801] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:16,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:16,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:52:16,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543906864] [2021-11-19 04:52:16,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:16,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:52:16,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:16,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:52:16,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:52:16,521 INFO L87 Difference]: Start difference. First operand 153 states and 204 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 04:52:16,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:16,573 INFO L93 Difference]: Finished difference Result 201 states and 262 transitions. [2021-11-19 04:52:16,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:52:16,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 85 [2021-11-19 04:52:16,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:16,577 INFO L225 Difference]: With dead ends: 201 [2021-11-19 04:52:16,577 INFO L226 Difference]: Without dead ends: 150 [2021-11-19 04:52:16,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:52:16,579 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 18 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:16,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 290 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:52:16,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-19 04:52:16,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2021-11-19 04:52:16,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 102 states have (on average 1.1568627450980393) internal successors, (118), 106 states have internal predecessors, (118), 34 states have call successors, (34), 12 states have call predecessors, (34), 13 states have return successors, (48), 31 states have call predecessors, (48), 32 states have call successors, (48) [2021-11-19 04:52:16,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 200 transitions. [2021-11-19 04:52:16,606 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 200 transitions. Word has length 85 [2021-11-19 04:52:16,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:16,607 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 200 transitions. [2021-11-19 04:52:16,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 04:52:16,608 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 200 transitions. [2021-11-19 04:52:16,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-19 04:52:16,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:16,616 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:16,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 04:52:16,616 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:16,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:16,617 INFO L85 PathProgramCache]: Analyzing trace with hash -176228817, now seen corresponding path program 1 times [2021-11-19 04:52:16,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:16,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829768977] [2021-11-19 04:52:16,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:16,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:17,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:17,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:52:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:17,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:52:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:17,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-19 04:52:17,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:17,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 04:52:17,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:17,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-19 04:52:17,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:17,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-19 04:52:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:17,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-19 04:52:17,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:17,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-19 04:52:17,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:17,244 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 04:52:17,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:17,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829768977] [2021-11-19 04:52:17,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829768977] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:17,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159924007] [2021-11-19 04:52:17,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:17,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:17,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:17,247 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:52:17,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 04:52:17,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:17,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 2537 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-19 04:52:17,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:17,843 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 [2021-11-19 04:52:19,032 INFO L354 Elim1Store]: treesize reduction 25, result has 10.7 percent of original size [2021-11-19 04:52:19,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 34 [2021-11-19 04:52:19,153 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 04:52:19,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:52:19,626 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 04:52:19,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159924007] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:52:19,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:52:19,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 11] total 23 [2021-11-19 04:52:19,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937966329] [2021-11-19 04:52:19,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:52:19,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-19 04:52:19,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:19,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-19 04:52:19,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-11-19 04:52:19,629 INFO L87 Difference]: Start difference. First operand 150 states and 200 transitions. Second operand has 23 states, 21 states have (on average 4.285714285714286) internal successors, (90), 21 states have internal predecessors, (90), 10 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2021-11-19 04:52:21,634 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:52:24,421 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:52:26,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:26,041 INFO L93 Difference]: Finished difference Result 293 states and 388 transitions. [2021-11-19 04:52:26,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-19 04:52:26,042 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 4.285714285714286) internal successors, (90), 21 states have internal predecessors, (90), 10 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 82 [2021-11-19 04:52:26,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:26,044 INFO L225 Difference]: With dead ends: 293 [2021-11-19 04:52:26,044 INFO L226 Difference]: Without dead ends: 201 [2021-11-19 04:52:26,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 163 SyntacticMatches, 13 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2021-11-19 04:52:26,047 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 124 mSDsluCounter, 1174 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 35 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1288 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:26,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 1288 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 724 Invalid, 1 Unknown, 180 Unchecked, 5.9s Time] [2021-11-19 04:52:26,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-19 04:52:26,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 164. [2021-11-19 04:52:26,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 114 states have (on average 1.131578947368421) internal successors, (129), 118 states have internal predecessors, (129), 34 states have call successors, (34), 14 states have call predecessors, (34), 15 states have return successors, (47), 31 states have call predecessors, (47), 32 states have call successors, (47) [2021-11-19 04:52:26,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 210 transitions. [2021-11-19 04:52:26,066 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 210 transitions. Word has length 82 [2021-11-19 04:52:26,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:26,067 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 210 transitions. [2021-11-19 04:52:26,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 4.285714285714286) internal successors, (90), 21 states have internal predecessors, (90), 10 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2021-11-19 04:52:26,067 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 210 transitions. [2021-11-19 04:52:26,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-19 04:52:26,069 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:26,069 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:26,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 04:52:26,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:26,278 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:26,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:26,278 INFO L85 PathProgramCache]: Analyzing trace with hash -146904725, now seen corresponding path program 1 times [2021-11-19 04:52:26,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:26,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187689256] [2021-11-19 04:52:26,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:26,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:26,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:52:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:52:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-19 04:52:26,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-19 04:52:26,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 04:52:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-19 04:52:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-19 04:52:26,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-19 04:52:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-19 04:52:26,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,617 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-19 04:52:26,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:26,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187689256] [2021-11-19 04:52:26,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187689256] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:26,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:26,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:52:26,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221110901] [2021-11-19 04:52:26,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:26,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:52:26,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:26,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:52:26,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:52:26,620 INFO L87 Difference]: Start difference. First operand 164 states and 210 transitions. Second operand has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-19 04:52:26,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:26,710 INFO L93 Difference]: Finished difference Result 176 states and 222 transitions. [2021-11-19 04:52:26,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:52:26,710 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (12), 2 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 87 [2021-11-19 04:52:26,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:26,712 INFO L225 Difference]: With dead ends: 176 [2021-11-19 04:52:26,713 INFO L226 Difference]: Without dead ends: 174 [2021-11-19 04:52:26,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:52:26,714 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 16 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:26,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 720 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:52:26,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-19 04:52:26,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 169. [2021-11-19 04:52:26,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 117 states have (on average 1.1282051282051282) internal successors, (132), 121 states have internal predecessors, (132), 35 states have call successors, (35), 15 states have call predecessors, (35), 16 states have return successors, (48), 32 states have call predecessors, (48), 33 states have call successors, (48) [2021-11-19 04:52:26,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 215 transitions. [2021-11-19 04:52:26,745 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 215 transitions. Word has length 87 [2021-11-19 04:52:26,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:26,746 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 215 transitions. [2021-11-19 04:52:26,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-19 04:52:26,746 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 215 transitions. [2021-11-19 04:52:26,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-19 04:52:26,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:26,750 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:26,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 04:52:26,751 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:26,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:26,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1299041201, now seen corresponding path program 1 times [2021-11-19 04:52:26,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:26,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585977959] [2021-11-19 04:52:26,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:26,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:26,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:52:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:52:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:26,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-19 04:52:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:27,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-19 04:52:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:27,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:52:27,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:27,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-19 04:52:27,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:27,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 04:52:27,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:27,076 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 04:52:27,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:27,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585977959] [2021-11-19 04:52:27,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585977959] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:27,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508955361] [2021-11-19 04:52:27,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:27,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:27,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:27,078 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:52:27,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 04:52:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:27,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 2521 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 04:52:27,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:27,723 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 04:52:27,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:52:27,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508955361] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:27,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:52:27,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-11-19 04:52:27,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64541320] [2021-11-19 04:52:27,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:27,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:52:27,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:27,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:52:27,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:52:27,726 INFO L87 Difference]: Start difference. First operand 169 states and 215 transitions. Second operand has 9 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:52:27,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:27,859 INFO L93 Difference]: Finished difference Result 268 states and 343 transitions. [2021-11-19 04:52:27,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:52:27,860 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 81 [2021-11-19 04:52:27,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:27,862 INFO L225 Difference]: With dead ends: 268 [2021-11-19 04:52:27,862 INFO L226 Difference]: Without dead ends: 173 [2021-11-19 04:52:27,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:52:27,864 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 12 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 819 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 [2021-11-19 04:52:27,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 819 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:52:27,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-19 04:52:27,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2021-11-19 04:52:27,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 117 states have (on average 1.1282051282051282) internal successors, (132), 121 states have internal predecessors, (132), 35 states have call successors, (35), 15 states have call predecessors, (35), 16 states have return successors, (47), 32 states have call predecessors, (47), 33 states have call successors, (47) [2021-11-19 04:52:27,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 214 transitions. [2021-11-19 04:52:27,880 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 214 transitions. Word has length 81 [2021-11-19 04:52:27,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:27,880 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 214 transitions. [2021-11-19 04:52:27,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:52:27,881 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 214 transitions. [2021-11-19 04:52:27,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-19 04:52:27,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:27,883 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:27,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 04:52:28,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-19 04:52:28,102 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:28,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:28,102 INFO L85 PathProgramCache]: Analyzing trace with hash 499080586, now seen corresponding path program 1 times [2021-11-19 04:52:28,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:28,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849319149] [2021-11-19 04:52:28,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:28,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:28,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:28,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:28,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:28,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:52:28,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:28,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:52:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:28,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-19 04:52:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:28,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-19 04:52:28,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:28,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-19 04:52:28,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:28,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-19 04:52:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:28,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-19 04:52:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:28,454 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 04:52:28,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:28,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849319149] [2021-11-19 04:52:28,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849319149] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:28,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760648940] [2021-11-19 04:52:28,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:28,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:28,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:28,457 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:52:28,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 04:52:28,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:28,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 2531 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 04:52:28,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:29,095 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:52:29,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:52:29,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760648940] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:29,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:52:29,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-11-19 04:52:29,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811834895] [2021-11-19 04:52:29,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:29,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:52:29,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:29,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:52:29,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:52:29,097 INFO L87 Difference]: Start difference. First operand 169 states and 214 transitions. Second operand has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:52:29,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:29,203 INFO L93 Difference]: Finished difference Result 272 states and 341 transitions. [2021-11-19 04:52:29,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:52:29,204 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 83 [2021-11-19 04:52:29,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:29,206 INFO L225 Difference]: With dead ends: 272 [2021-11-19 04:52:29,206 INFO L226 Difference]: Without dead ends: 168 [2021-11-19 04:52:29,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:52:29,207 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 12 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:29,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 812 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:52:29,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-19 04:52:29,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-11-19 04:52:29,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 116 states have (on average 1.1206896551724137) internal successors, (130), 120 states have internal predecessors, (130), 35 states have call successors, (35), 15 states have call predecessors, (35), 16 states have return successors, (46), 32 states have call predecessors, (46), 33 states have call successors, (46) [2021-11-19 04:52:29,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 211 transitions. [2021-11-19 04:52:29,223 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 211 transitions. Word has length 83 [2021-11-19 04:52:29,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:29,223 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 211 transitions. [2021-11-19 04:52:29,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:52:29,223 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 211 transitions. [2021-11-19 04:52:29,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-19 04:52:29,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:29,226 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:29,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-19 04:52:29,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-19 04:52:29,442 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:29,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:29,442 INFO L85 PathProgramCache]: Analyzing trace with hash 2124358860, now seen corresponding path program 1 times [2021-11-19 04:52:29,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:29,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147717971] [2021-11-19 04:52:29,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:29,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:52:29,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:52:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-19 04:52:29,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-19 04:52:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-19 04:52:29,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-19 04:52:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-19 04:52:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 04:52:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 04:52:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:29,949 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 24 proven. 11 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 04:52:29,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:29,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147717971] [2021-11-19 04:52:29,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147717971] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:29,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974864106] [2021-11-19 04:52:29,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:29,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:29,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:29,954 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:52:29,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 04:52:30,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:30,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 2551 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-19 04:52:30,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:33,617 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 49 treesize of output 41 [2021-11-19 04:52:33,622 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 30 [2021-11-19 04:52:33,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-11-19 04:52:33,820 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 04:52:33,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:52:33,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974864106] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:33,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:52:33,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [11] total 23 [2021-11-19 04:52:33,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261705955] [2021-11-19 04:52:33,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:33,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 04:52:33,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:33,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 04:52:33,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=415, Unknown=1, NotChecked=0, Total=506 [2021-11-19 04:52:33,823 INFO L87 Difference]: Start difference. First operand 168 states and 211 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 12 states have internal predecessors, (56), 3 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 04:52:36,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:36,908 INFO L93 Difference]: Finished difference Result 310 states and 403 transitions. [2021-11-19 04:52:36,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 04:52:36,909 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 12 states have internal predecessors, (56), 3 states have call successors, (12), 3 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 93 [2021-11-19 04:52:36,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:36,912 INFO L225 Difference]: With dead ends: 310 [2021-11-19 04:52:36,912 INFO L226 Difference]: Without dead ends: 221 [2021-11-19 04:52:36,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=204, Invalid=787, Unknown=1, NotChecked=0, Total=992 [2021-11-19 04:52:36,914 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 171 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:36,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 461 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 710 Invalid, 0 Unknown, 115 Unchecked, 2.3s Time] [2021-11-19 04:52:36,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-19 04:52:36,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 186. [2021-11-19 04:52:36,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 131 states have (on average 1.1221374045801527) internal successors, (147), 135 states have internal predecessors, (147), 36 states have call successors, (36), 16 states have call predecessors, (36), 18 states have return successors, (55), 34 states have call predecessors, (55), 34 states have call successors, (55) [2021-11-19 04:52:36,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 238 transitions. [2021-11-19 04:52:36,947 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 238 transitions. Word has length 93 [2021-11-19 04:52:36,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:36,947 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 238 transitions. [2021-11-19 04:52:36,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 12 states have internal predecessors, (56), 3 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 04:52:36,948 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 238 transitions. [2021-11-19 04:52:36,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-19 04:52:36,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:36,952 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:36,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 04:52:37,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:37,165 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:37,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:37,167 INFO L85 PathProgramCache]: Analyzing trace with hash 213316302, now seen corresponding path program 1 times [2021-11-19 04:52:37,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:37,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946196252] [2021-11-19 04:52:37,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:37,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:37,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:37,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:37,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:37,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:52:37,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:37,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:52:37,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:37,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-19 04:52:37,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:37,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-19 04:52:37,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:37,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-19 04:52:37,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:37,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-19 04:52:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:37,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-19 04:52:37,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:37,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 04:52:37,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:37,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-19 04:52:37,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-19 04:52:37,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:37,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946196252] [2021-11-19 04:52:37,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946196252] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:37,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349724823] [2021-11-19 04:52:37,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:37,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:37,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:37,468 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:52:37,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 04:52:37,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:37,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 2546 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 04:52:37,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-19 04:52:38,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:52:38,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349724823] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:38,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:52:38,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-19 04:52:38,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114920657] [2021-11-19 04:52:38,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:38,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:52:38,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:38,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:52:38,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:52:38,112 INFO L87 Difference]: Start difference. First operand 186 states and 238 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2021-11-19 04:52:38,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:38,147 INFO L93 Difference]: Finished difference Result 299 states and 388 transitions. [2021-11-19 04:52:38,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:52:38,148 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 93 [2021-11-19 04:52:38,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:38,150 INFO L225 Difference]: With dead ends: 299 [2021-11-19 04:52:38,150 INFO L226 Difference]: Without dead ends: 177 [2021-11-19 04:52:38,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:52:38,152 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 6 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:38,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 316 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:52:38,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-19 04:52:38,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2021-11-19 04:52:38,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 121 states have (on average 1.0909090909090908) internal successors, (132), 125 states have internal predecessors, (132), 35 states have call successors, (35), 16 states have call predecessors, (35), 17 states have return successors, (46), 32 states have call predecessors, (46), 33 states have call successors, (46) [2021-11-19 04:52:38,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 213 transitions. [2021-11-19 04:52:38,167 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 213 transitions. Word has length 93 [2021-11-19 04:52:38,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:38,168 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 213 transitions. [2021-11-19 04:52:38,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2021-11-19 04:52:38,168 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 213 transitions. [2021-11-19 04:52:38,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-19 04:52:38,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:38,170 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:38,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 04:52:38,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:38,386 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:38,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:38,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1747338265, now seen corresponding path program 1 times [2021-11-19 04:52:38,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:38,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603087924] [2021-11-19 04:52:38,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:38,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:38,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:38,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:52:38,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:38,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:52:38,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:38,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-19 04:52:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:38,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-19 04:52:38,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:38,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-19 04:52:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:38,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-19 04:52:38,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:38,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-19 04:52:38,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:38,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-19 04:52:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:38,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-19 04:52:38,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:38,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-19 04:52:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:38,813 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-19 04:52:38,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:38,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603087924] [2021-11-19 04:52:38,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603087924] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:38,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:38,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:52:38,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619172075] [2021-11-19 04:52:38,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:38,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:52:38,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:38,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:52:38,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:52:38,815 INFO L87 Difference]: Start difference. First operand 174 states and 213 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 04:52:40,129 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:52:41,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:41,076 INFO L93 Difference]: Finished difference Result 228 states and 286 transitions. [2021-11-19 04:52:41,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:52:41,077 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 100 [2021-11-19 04:52:41,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:41,079 INFO L225 Difference]: With dead ends: 228 [2021-11-19 04:52:41,079 INFO L226 Difference]: Without dead ends: 181 [2021-11-19 04:52:41,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:52:41,080 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 38 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:41,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 373 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 04:52:41,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-19 04:52:41,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2021-11-19 04:52:41,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 122 states have (on average 1.0901639344262295) internal successors, (133), 127 states have internal predecessors, (133), 39 states have call successors, (39), 16 states have call predecessors, (39), 17 states have return successors, (52), 35 states have call predecessors, (52), 37 states have call successors, (52) [2021-11-19 04:52:41,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 224 transitions. [2021-11-19 04:52:41,096 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 224 transitions. Word has length 100 [2021-11-19 04:52:41,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:41,096 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 224 transitions. [2021-11-19 04:52:41,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 04:52:41,097 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 224 transitions. [2021-11-19 04:52:41,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-19 04:52:41,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:41,099 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 04:52:41,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-19 04:52:41,099 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:41,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:41,100 INFO L85 PathProgramCache]: Analyzing trace with hash -250057666, now seen corresponding path program 1 times [2021-11-19 04:52:41,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:41,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376022624] [2021-11-19 04:52:41,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:41,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:41,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:41,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:41,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:52:41,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:41,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:52:41,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:41,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-19 04:52:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:41,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-19 04:52:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:41,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-19 04:52:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:41,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-19 04:52:41,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:41,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-19 04:52:41,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:41,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-19 04:52:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:41,511 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-19 04:52:41,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:41,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376022624] [2021-11-19 04:52:41,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376022624] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:41,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420450791] [2021-11-19 04:52:41,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:41,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:41,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:41,514 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:52:41,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 04:52:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:42,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 2562 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-19 04:52:42,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:42,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-19 04:52:42,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-19 04:52:42,471 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 29 treesize of output 21 [2021-11-19 04:52:42,474 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 18 treesize of output 10 [2021-11-19 04:52:42,595 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 04:52:42,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:52:42,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420450791] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:42,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:52:42,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2021-11-19 04:52:42,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159817077] [2021-11-19 04:52:42,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:42,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:52:42,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:42,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:52:42,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:52:42,598 INFO L87 Difference]: Start difference. First operand 179 states and 224 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-19 04:52:42,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:42,731 INFO L93 Difference]: Finished difference Result 331 states and 420 transitions. [2021-11-19 04:52:42,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:52:42,732 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 92 [2021-11-19 04:52:42,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:42,734 INFO L225 Difference]: With dead ends: 331 [2021-11-19 04:52:42,734 INFO L226 Difference]: Without dead ends: 208 [2021-11-19 04:52:42,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 102 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:52:42,736 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 35 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:42,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 534 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2021-11-19 04:52:42,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-19 04:52:42,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 194. [2021-11-19 04:52:42,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 133 states have (on average 1.0827067669172932) internal successors, (144), 139 states have internal predecessors, (144), 41 states have call successors, (41), 18 states have call predecessors, (41), 19 states have return successors, (54), 36 states have call predecessors, (54), 39 states have call successors, (54) [2021-11-19 04:52:42,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 239 transitions. [2021-11-19 04:52:42,753 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 239 transitions. Word has length 92 [2021-11-19 04:52:42,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:42,753 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 239 transitions. [2021-11-19 04:52:42,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-19 04:52:42,754 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 239 transitions. [2021-11-19 04:52:42,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-19 04:52:42,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:42,756 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:42,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-19 04:52:42,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-19 04:52:42,969 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:42,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:42,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1187805753, now seen corresponding path program 1 times [2021-11-19 04:52:42,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:42,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590489817] [2021-11-19 04:52:42,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:42,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:43,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:43,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:43,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:52:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:43,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:52:43,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:43,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-19 04:52:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:43,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 04:52:43,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:43,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:52:43,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:43,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:52:43,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:43,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:52:43,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:43,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-19 04:52:43,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:43,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 04:52:43,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:43,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-19 04:52:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:43,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 04:52:43,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:43,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-19 04:52:43,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:43,301 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-19 04:52:43,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:43,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590489817] [2021-11-19 04:52:43,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590489817] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:52:43,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:52:43,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 04:52:43,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683503184] [2021-11-19 04:52:43,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:52:43,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:52:43,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:43,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:52:43,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:52:43,305 INFO L87 Difference]: Start difference. First operand 194 states and 239 transitions. Second operand has 9 states, 8 states have (on average 5.125) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 04:52:45,347 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:52:45,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:45,830 INFO L93 Difference]: Finished difference Result 202 states and 247 transitions. [2021-11-19 04:52:45,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:52:45,831 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 100 [2021-11-19 04:52:45,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:45,833 INFO L225 Difference]: With dead ends: 202 [2021-11-19 04:52:45,833 INFO L226 Difference]: Without dead ends: 200 [2021-11-19 04:52:45,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:52:45,834 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 51 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:45,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 523 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 289 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 04:52:45,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-19 04:52:45,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2021-11-19 04:52:45,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 136 states have (on average 1.0808823529411764) internal successors, (147), 142 states have internal predecessors, (147), 42 states have call successors, (42), 19 states have call predecessors, (42), 20 states have return successors, (55), 37 states have call predecessors, (55), 40 states have call successors, (55) [2021-11-19 04:52:45,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 244 transitions. [2021-11-19 04:52:45,855 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 244 transitions. Word has length 100 [2021-11-19 04:52:45,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:45,856 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 244 transitions. [2021-11-19 04:52:45,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 04:52:45,856 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 244 transitions. [2021-11-19 04:52:45,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-19 04:52:45,858 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:45,858 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:45,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-19 04:52:45,859 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:45,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:45,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1946355713, now seen corresponding path program 1 times [2021-11-19 04:52:45,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:45,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018114823] [2021-11-19 04:52:45,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:45,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:45,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:46,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:46,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:46,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:52:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:46,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:52:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:46,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-19 04:52:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:46,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 04:52:46,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:46,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:52:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:46,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:52:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:46,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:52:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:46,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-19 04:52:46,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:46,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 04:52:46,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:46,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-19 04:52:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:46,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 04:52:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:46,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-19 04:52:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:46,677 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-19 04:52:46,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:46,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018114823] [2021-11-19 04:52:46,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018114823] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:46,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579042062] [2021-11-19 04:52:46,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:46,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:46,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:46,679 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:52:46,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 04:52:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:47,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 2582 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-19 04:52:47,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:47,170 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 [2021-11-19 04:52:48,001 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 32 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-19 04:52:48,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:52:48,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579042062] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:48,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:52:48,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 27 [2021-11-19 04:52:48,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907517437] [2021-11-19 04:52:48,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:52:48,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-19 04:52:48,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:52:48,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-19 04:52:48,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-11-19 04:52:48,421 INFO L87 Difference]: Start difference. First operand 199 states and 244 transitions. Second operand has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 12 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2021-11-19 04:52:53,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:52:53,216 INFO L93 Difference]: Finished difference Result 343 states and 450 transitions. [2021-11-19 04:52:53,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 04:52:53,216 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 12 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) Word has length 104 [2021-11-19 04:52:53,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:52:53,219 INFO L225 Difference]: With dead ends: 343 [2021-11-19 04:52:53,219 INFO L226 Difference]: Without dead ends: 253 [2021-11-19 04:52:53,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 138 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=341, Invalid=2521, Unknown=0, NotChecked=0, Total=2862 [2021-11-19 04:52:53,222 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 244 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 1813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:52:53,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 438 Invalid, 1813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1388 Invalid, 0 Unknown, 230 Unchecked, 3.9s Time] [2021-11-19 04:52:53,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-11-19 04:52:53,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 217. [2021-11-19 04:52:53,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 139 states have (on average 1.0719424460431655) internal successors, (149), 144 states have internal predecessors, (149), 57 states have call successors, (57), 19 states have call predecessors, (57), 20 states have return successors, (75), 53 states have call predecessors, (75), 55 states have call successors, (75) [2021-11-19 04:52:53,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 281 transitions. [2021-11-19 04:52:53,247 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 281 transitions. Word has length 104 [2021-11-19 04:52:53,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:52:53,247 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 281 transitions. [2021-11-19 04:52:53,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 12 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2021-11-19 04:52:53,248 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 281 transitions. [2021-11-19 04:52:53,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-19 04:52:53,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:52:53,250 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:52:53,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 04:52:53,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-19 04:52:53,462 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:52:53,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:52:53,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1261447352, now seen corresponding path program 1 times [2021-11-19 04:52:53,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:52:53,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534552565] [2021-11-19 04:52:53,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:53,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:52:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:54,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:52:54,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:54,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:52:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:54,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:52:54,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:54,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:52:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:54,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 04:52:54,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:54,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:52:54,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:54,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-19 04:52:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:54,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-19 04:52:54,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:54,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-19 04:52:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:54,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-19 04:52:54,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:55,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-19 04:52:55,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:55,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-19 04:52:55,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:55,220 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-19 04:52:55,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:52:55,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534552565] [2021-11-19 04:52:55,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534552565] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:52:55,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537966348] [2021-11-19 04:52:55,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:52:55,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:52:55,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:52:55,222 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:52:55,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 04:52:55,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:52:55,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 2623 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-19 04:52:55,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:52:55,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 04:52:56,072 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-19 04:52:56,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 21 [2021-11-19 04:52:56,227 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 25 treesize of output 21 [2021-11-19 04:52:56,997 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-19 04:52:56,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-11-19 04:52:57,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2021-11-19 04:53:07,294 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-19 04:53:07,295 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 48 treesize of output 24 [2021-11-19 04:54:03,859 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 30 proven. 52 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 04:54:03,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:54:06,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537966348] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:06,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:54:06,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2021-11-19 04:54:06,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555566261] [2021-11-19 04:54:06,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:54:06,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-19 04:54:06,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:06,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-19 04:54:06,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1883, Unknown=3, NotChecked=0, Total=2070 [2021-11-19 04:54:06,428 INFO L87 Difference]: Start difference. First operand 217 states and 281 transitions. Second operand has 37 states, 35 states have (on average 3.6857142857142855) internal successors, (129), 31 states have internal predecessors, (129), 13 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (23), 12 states have call predecessors, (23), 10 states have call successors, (23) [2021-11-19 04:54:08,833 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:54:11,948 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:54:13,633 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:54:14,802 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:54:16,402 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:54:19,022 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:54:28,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:28,861 INFO L93 Difference]: Finished difference Result 404 states and 507 transitions. [2021-11-19 04:54:28,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-19 04:54:28,877 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 3.6857142857142855) internal successors, (129), 31 states have internal predecessors, (129), 13 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (23), 12 states have call predecessors, (23), 10 states have call successors, (23) Word has length 109 [2021-11-19 04:54:28,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:28,881 INFO L225 Difference]: With dead ends: 404 [2021-11-19 04:54:28,881 INFO L226 Difference]: Without dead ends: 324 [2021-11-19 04:54:28,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 158 SyntacticMatches, 17 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1887 ImplicationChecksByTransitivity, 77.0s TimeCoverageRelationStatistics Valid=446, Invalid=4949, Unknown=7, NotChecked=0, Total=5402 [2021-11-19 04:54:28,886 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 182 mSDsluCounter, 1561 mSDsCounter, 0 mSdLazyCounter, 1676 mSolverCounterSat, 95 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 1703 SdHoareTripleChecker+Invalid, 2533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1676 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 760 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:28,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 1703 Invalid, 2533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1676 Invalid, 2 Unknown, 760 Unchecked, 14.6s Time] [2021-11-19 04:54:28,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-11-19 04:54:28,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 291. [2021-11-19 04:54:28,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 196 states have (on average 1.0765306122448979) internal successors, (211), 202 states have internal predecessors, (211), 66 states have call successors, (66), 26 states have call predecessors, (66), 28 states have return successors, (84), 62 states have call predecessors, (84), 64 states have call successors, (84) [2021-11-19 04:54:28,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 361 transitions. [2021-11-19 04:54:28,920 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 361 transitions. Word has length 109 [2021-11-19 04:54:28,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:28,920 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 361 transitions. [2021-11-19 04:54:28,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 3.6857142857142855) internal successors, (129), 31 states have internal predecessors, (129), 13 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (23), 12 states have call predecessors, (23), 10 states have call successors, (23) [2021-11-19 04:54:28,921 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 361 transitions. [2021-11-19 04:54:28,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-19 04:54:28,924 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:28,924 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:28,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-19 04:54:29,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:29,147 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:54:29,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:29,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1003281914, now seen corresponding path program 1 times [2021-11-19 04:54:29,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:29,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687088487] [2021-11-19 04:54:29,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:29,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:54:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:54:29,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:54:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:54:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 04:54:29,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:54:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-19 04:54:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-19 04:54:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-19 04:54:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-19 04:54:29,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-19 04:54:29,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-19 04:54:29,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,529 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-19 04:54:29,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:29,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687088487] [2021-11-19 04:54:29,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687088487] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:54:29,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:54:29,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:54:29,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688721114] [2021-11-19 04:54:29,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:29,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:54:29,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:29,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:54:29,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:54:29,534 INFO L87 Difference]: Start difference. First operand 291 states and 361 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-19 04:54:30,996 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:54:33,045 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:54:33,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:33,377 INFO L93 Difference]: Finished difference Result 367 states and 465 transitions. [2021-11-19 04:54:33,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:54:33,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 109 [2021-11-19 04:54:33,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:33,381 INFO L225 Difference]: With dead ends: 367 [2021-11-19 04:54:33,381 INFO L226 Difference]: Without dead ends: 281 [2021-11-19 04:54:33,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:54:33,383 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 43 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 23 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:33,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 250 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 107 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2021-11-19 04:54:33,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-19 04:54:33,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2021-11-19 04:54:33,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 188 states have (on average 1.0691489361702127) internal successors, (201), 193 states have internal predecessors, (201), 65 states have call successors, (65), 26 states have call predecessors, (65), 27 states have return successors, (82), 61 states have call predecessors, (82), 63 states have call successors, (82) [2021-11-19 04:54:33,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 348 transitions. [2021-11-19 04:54:33,418 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 348 transitions. Word has length 109 [2021-11-19 04:54:33,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:33,418 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 348 transitions. [2021-11-19 04:54:33,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-19 04:54:33,419 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 348 transitions. [2021-11-19 04:54:33,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-19 04:54:33,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:33,422 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:33,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-19 04:54:33,422 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:54:33,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:33,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1112110986, now seen corresponding path program 1 times [2021-11-19 04:54:33,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:33,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542292607] [2021-11-19 04:54:33,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:33,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:54:34,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:54:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:54:34,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:54:34,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 04:54:34,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:54:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-19 04:54:34,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-19 04:54:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-19 04:54:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-19 04:54:34,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-19 04:54:34,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-19 04:54:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-19 04:54:34,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:34,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542292607] [2021-11-19 04:54:34,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542292607] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:34,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744295183] [2021-11-19 04:54:34,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:34,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:34,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:34,882 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:34,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-19 04:54:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:35,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 2635 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-19 04:54:35,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:35,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 04:54:35,789 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-19 04:54:35,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 21 [2021-11-19 04:54:35,975 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 25 treesize of output 21 [2021-11-19 04:54:36,840 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-19 04:54:36,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-11-19 04:54:36,934 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 40 treesize of output 20 [2021-11-19 04:54:47,416 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-19 04:54:47,417 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 48 treesize of output 24 [2021-11-19 04:55:02,832 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_aws_byte_cursor_left_trim_pred_~source.base_BEFORE_CALL_27 Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| v_aws_byte_cursor_left_trim_pred_~source.base_BEFORE_CALL_27) 8))) (and (not (= v_aws_byte_cursor_left_trim_pred_~source.base_BEFORE_CALL_27 .cse0)) (not (= 0 .cse0))))) is different from true [2021-11-19 04:55:24,372 INFO L354 Elim1Store]: treesize reduction 25, result has 41.9 percent of original size [2021-11-19 04:55:24,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 50 [2021-11-19 04:55:24,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:55:24,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:55:24,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 47 [2021-11-19 04:55:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 31 proven. 46 refuted. 0 times theorem prover too weak. 5 trivial. 16 not checked. [2021-11-19 04:55:30,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:55:31,200 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-19 04:55:31,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-19 04:55:33,343 WARN L838 $PredicateComparison]: unable to prove that (forall ((|aws_byte_cursor_left_trim_pred_~#trimmed~1.base| Int) (v_DerPreprocessor_3 Int)) (or (not (= (select (select (store |c_#memory_$Pointer$.base| |aws_byte_cursor_left_trim_pred_~#trimmed~1.base| (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |aws_byte_cursor_left_trim_pred_~#trimmed~1.base|) |c_aws_byte_cursor_left_trim_pred_~#trimmed~1.offset| v_DerPreprocessor_3)) (.cse1 (+ |c_aws_byte_cursor_left_trim_pred_~#trimmed~1.offset| 8))) (store .cse0 .cse1 (select .cse0 .cse1)))) c_aws_byte_cursor_left_trim_pred_~source.base) (+ c_aws_byte_cursor_left_trim_pred_~source.offset 8)) 0)) (and (= c_aws_byte_cursor_left_trim_pred_~source.base |aws_byte_cursor_left_trim_pred_~#trimmed~1.base|) (= c_aws_byte_cursor_left_trim_pred_~source.offset |c_aws_byte_cursor_left_trim_pred_~#trimmed~1.offset|)))) is different from false [2021-11-19 04:55:33,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744295183] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:55:33,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:55:33,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28] total 44 [2021-11-19 04:55:33,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247220801] [2021-11-19 04:55:33,429 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:55:33,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-19 04:55:33,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:55:33,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-19 04:55:33,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2423, Unknown=4, NotChecked=202, Total=2862 [2021-11-19 04:55:33,432 INFO L87 Difference]: Start difference. First operand 281 states and 348 transitions. Second operand has 44 states, 42 states have (on average 3.119047619047619) internal successors, (131), 38 states have internal predecessors, (131), 16 states have call successors, (26), 11 states have call predecessors, (26), 9 states have return successors, (23), 14 states have call predecessors, (23), 13 states have call successors, (23) [2021-11-19 04:55:36,404 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:55:45,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:55:45,393 INFO L93 Difference]: Finished difference Result 416 states and 496 transitions. [2021-11-19 04:55:45,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-19 04:55:45,394 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 3.119047619047619) internal successors, (131), 38 states have internal predecessors, (131), 16 states have call successors, (26), 11 states have call predecessors, (26), 9 states have return successors, (23), 14 states have call predecessors, (23), 13 states have call successors, (23) Word has length 112 [2021-11-19 04:55:45,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:55:45,397 INFO L225 Difference]: With dead ends: 416 [2021-11-19 04:55:45,398 INFO L226 Difference]: Without dead ends: 350 [2021-11-19 04:55:45,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 120 SyntacticMatches, 16 SemanticMatches, 85 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2258 ImplicationChecksByTransitivity, 61.3s TimeCoverageRelationStatistics Valid=582, Invalid=6562, Unknown=4, NotChecked=334, Total=7482 [2021-11-19 04:55:45,402 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 144 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 97 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 2178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 899 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:55:45,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 943 Invalid, 2178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1181 Invalid, 1 Unknown, 899 Unchecked, 6.5s Time] [2021-11-19 04:55:45,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-11-19 04:55:45,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 323. [2021-11-19 04:55:45,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 224 states have (on average 1.0758928571428572) internal successors, (241), 232 states have internal predecessors, (241), 64 states have call successors, (64), 30 states have call predecessors, (64), 34 states have return successors, (79), 60 states have call predecessors, (79), 62 states have call successors, (79) [2021-11-19 04:55:45,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 384 transitions. [2021-11-19 04:55:45,437 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 384 transitions. Word has length 112 [2021-11-19 04:55:45,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:55:45,437 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 384 transitions. [2021-11-19 04:55:45,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 3.119047619047619) internal successors, (131), 38 states have internal predecessors, (131), 16 states have call successors, (26), 11 states have call predecessors, (26), 9 states have return successors, (23), 14 states have call predecessors, (23), 13 states have call successors, (23) [2021-11-19 04:55:45,438 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 384 transitions. [2021-11-19 04:55:45,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-19 04:55:45,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:55:45,441 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:55:45,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-19 04:55:45,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-19 04:55:45,666 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:55:45,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:55:45,666 INFO L85 PathProgramCache]: Analyzing trace with hash 634770534, now seen corresponding path program 1 times [2021-11-19 04:55:45,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:55:45,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221402947] [2021-11-19 04:55:45,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:55:45,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:55:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:45,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:55:45,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:45,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:55:45,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:45,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:55:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:45,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-19 04:55:45,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:45,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 04:55:45,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:45,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:55:45,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:45,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:55:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:45,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:55:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:45,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-19 04:55:45,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:45,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 04:55:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:45,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-19 04:55:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:45,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 04:55:45,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:45,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-19 04:55:45,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:45,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-19 04:55:45,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:45,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-19 04:55:45,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:46,049 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-19 04:55:46,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:55:46,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221402947] [2021-11-19 04:55:46,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221402947] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:55:46,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:55:46,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 04:55:46,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471417257] [2021-11-19 04:55:46,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:55:46,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:55:46,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:55:46,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:55:46,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:55:46,053 INFO L87 Difference]: Start difference. First operand 323 states and 384 transitions. Second operand has 9 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-19 04:55:47,187 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:55:47,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:55:47,700 INFO L93 Difference]: Finished difference Result 331 states and 392 transitions. [2021-11-19 04:55:47,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:55:47,701 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 115 [2021-11-19 04:55:47,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:55:47,703 INFO L225 Difference]: With dead ends: 331 [2021-11-19 04:55:47,704 INFO L226 Difference]: Without dead ends: 329 [2021-11-19 04:55:47,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:55:47,705 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 49 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:55:47,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 522 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 04:55:47,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-11-19 04:55:47,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 328. [2021-11-19 04:55:47,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 227 states have (on average 1.0748898678414096) internal successors, (244), 235 states have internal predecessors, (244), 65 states have call successors, (65), 31 states have call predecessors, (65), 35 states have return successors, (80), 61 states have call predecessors, (80), 63 states have call successors, (80) [2021-11-19 04:55:47,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 389 transitions. [2021-11-19 04:55:47,736 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 389 transitions. Word has length 115 [2021-11-19 04:55:47,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:55:47,737 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 389 transitions. [2021-11-19 04:55:47,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-19 04:55:47,737 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 389 transitions. [2021-11-19 04:55:47,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-19 04:55:47,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:55:47,740 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:55:47,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-19 04:55:47,740 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:55:47,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:55:47,741 INFO L85 PathProgramCache]: Analyzing trace with hash 716580214, now seen corresponding path program 1 times [2021-11-19 04:55:47,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:55:47,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904113419] [2021-11-19 04:55:47,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:55:47,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:55:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:47,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:55:47,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:47,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:55:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:47,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:55:47,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:47,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:55:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:47,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 04:55:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:47,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:55:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:47,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-19 04:55:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:48,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-19 04:55:48,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:48,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:55:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:48,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:55:48,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:48,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:55:48,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:48,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-19 04:55:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:48,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 04:55:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:48,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-19 04:55:48,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:48,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 04:55:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:48,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-11-19 04:55:48,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:48,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-19 04:55:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:48,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-11-19 04:55:48,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-19 04:55:48,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:55:48,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904113419] [2021-11-19 04:55:48,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904113419] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:55:48,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:55:48,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-19 04:55:48,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073692352] [2021-11-19 04:55:48,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:55:48,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 04:55:48,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:55:48,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 04:55:48,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:55:48,476 INFO L87 Difference]: Start difference. First operand 328 states and 389 transitions. Second operand has 15 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 7 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2021-11-19 04:55:50,530 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:55:54,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:55:54,512 INFO L93 Difference]: Finished difference Result 355 states and 424 transitions. [2021-11-19 04:55:54,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 04:55:54,513 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 7 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) Word has length 143 [2021-11-19 04:55:54,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:55:54,516 INFO L225 Difference]: With dead ends: 355 [2021-11-19 04:55:54,517 INFO L226 Difference]: Without dead ends: 342 [2021-11-19 04:55:54,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-11-19 04:55:54,518 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 130 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 100 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:55:54,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 383 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 873 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2021-11-19 04:55:54,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-11-19 04:55:54,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 334. [2021-11-19 04:55:54,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 230 states have (on average 1.0739130434782609) internal successors, (247), 238 states have internal predecessors, (247), 68 states have call successors, (68), 31 states have call predecessors, (68), 35 states have return successors, (83), 64 states have call predecessors, (83), 66 states have call successors, (83) [2021-11-19 04:55:54,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 398 transitions. [2021-11-19 04:55:54,553 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 398 transitions. Word has length 143 [2021-11-19 04:55:54,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:55:54,554 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 398 transitions. [2021-11-19 04:55:54,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 7 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2021-11-19 04:55:54,554 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 398 transitions. [2021-11-19 04:55:54,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 04:55:54,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:55:54,557 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:55:54,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-19 04:55:54,558 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:55:54,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:55:54,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1305766989, now seen corresponding path program 1 times [2021-11-19 04:55:54,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:55:54,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243635169] [2021-11-19 04:55:54,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:55:54,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:55:54,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:55,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:55:55,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:55,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:55:55,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:55,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:55:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:55,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-19 04:55:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:55,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 04:55:55,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:55,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:55:55,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:55,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:55:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:55,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:55:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:55,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-19 04:55:55,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:55,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 04:55:55,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:55,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-19 04:55:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:55,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 04:55:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:55,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-19 04:55:55,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:55,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-19 04:55:55,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:55,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-19 04:55:55,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:55,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-19 04:55:55,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:55:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-19 04:55:55,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:55:55,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243635169] [2021-11-19 04:55:55,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243635169] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:55:55,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:55:55,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-19 04:55:55,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400220913] [2021-11-19 04:55:55,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:55:55,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 04:55:55,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:55:55,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 04:55:55,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:55:55,263 INFO L87 Difference]: Start difference. First operand 334 states and 398 transitions. Second operand has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 5 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 04:55:57,423 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:55:59,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:55:59,829 INFO L93 Difference]: Finished difference Result 355 states and 421 transitions. [2021-11-19 04:55:59,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:55:59,830 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 5 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 125 [2021-11-19 04:55:59,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:55:59,832 INFO L225 Difference]: With dead ends: 355 [2021-11-19 04:55:59,832 INFO L226 Difference]: Without dead ends: 260 [2021-11-19 04:55:59,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:55:59,833 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 46 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:55:59,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 335 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 577 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2021-11-19 04:55:59,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-19 04:55:59,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 252. [2021-11-19 04:55:59,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 175 states have (on average 1.0857142857142856) internal successors, (190), 181 states have internal predecessors, (190), 50 states have call successors, (50), 22 states have call predecessors, (50), 26 states have return successors, (64), 48 states have call predecessors, (64), 48 states have call successors, (64) [2021-11-19 04:55:59,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 304 transitions. [2021-11-19 04:55:59,858 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 304 transitions. Word has length 125 [2021-11-19 04:55:59,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:55:59,858 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 304 transitions. [2021-11-19 04:55:59,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 5 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 04:55:59,859 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 304 transitions. [2021-11-19 04:55:59,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 04:55:59,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:55:59,861 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:55:59,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-19 04:55:59,862 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:55:59,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:55:59,862 INFO L85 PathProgramCache]: Analyzing trace with hash 868973393, now seen corresponding path program 1 times [2021-11-19 04:55:59,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:55:59,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708944050] [2021-11-19 04:55:59,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:55:59,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:56:00,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:01,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:56:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:01,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:56:01,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:01,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:56:01,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:01,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:56:01,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:01,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 04:56:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:01,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:56:01,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:01,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-19 04:56:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:01,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-19 04:56:01,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:01,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-19 04:56:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:01,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-19 04:56:01,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:01,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-19 04:56:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:01,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-19 04:56:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:01,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-19 04:56:01,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:01,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-19 04:56:01,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:01,815 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-19 04:56:01,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:56:01,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708944050] [2021-11-19 04:56:01,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708944050] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:56:01,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:56:01,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 04:56:01,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633147139] [2021-11-19 04:56:01,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:56:01,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 04:56:01,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:56:01,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 04:56:01,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-11-19 04:56:01,818 INFO L87 Difference]: Start difference. First operand 252 states and 304 transitions. Second operand has 21 states, 20 states have (on average 3.0) internal successors, (60), 18 states have internal predecessors, (60), 10 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 10 states have call predecessors, (14), 8 states have call successors, (14) [2021-11-19 04:56:03,873 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:56:05,956 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:56:08,018 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:56:10,087 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:56:11,167 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:56:12,202 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:56:14,226 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:56:17,921 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:56:19,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:56:19,603 INFO L93 Difference]: Finished difference Result 316 states and 378 transitions. [2021-11-19 04:56:19,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 04:56:19,604 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 18 states have internal predecessors, (60), 10 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 10 states have call predecessors, (14), 8 states have call successors, (14) Word has length 129 [2021-11-19 04:56:19,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:56:19,607 INFO L225 Difference]: With dead ends: 316 [2021-11-19 04:56:19,607 INFO L226 Difference]: Without dead ends: 252 [2021-11-19 04:56:19,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2021-11-19 04:56:19,609 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 136 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 97 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:56:19,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 323 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1220 Invalid, 5 Unknown, 0 Unchecked, 17.4s Time] [2021-11-19 04:56:19,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-19 04:56:19,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2021-11-19 04:56:19,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 175 states have (on average 1.0857142857142856) internal successors, (190), 181 states have internal predecessors, (190), 50 states have call successors, (50), 22 states have call predecessors, (50), 26 states have return successors, (60), 48 states have call predecessors, (60), 48 states have call successors, (60) [2021-11-19 04:56:19,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 300 transitions. [2021-11-19 04:56:19,647 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 300 transitions. Word has length 129 [2021-11-19 04:56:19,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:56:19,648 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 300 transitions. [2021-11-19 04:56:19,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 18 states have internal predecessors, (60), 10 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 10 states have call predecessors, (14), 8 states have call successors, (14) [2021-11-19 04:56:19,650 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 300 transitions. [2021-11-19 04:56:19,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 04:56:19,652 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:56:19,652 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:56:19,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-19 04:56:19,652 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:56:19,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:56:19,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1381910248, now seen corresponding path program 1 times [2021-11-19 04:56:19,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:56:19,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099552231] [2021-11-19 04:56:19,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:56:19,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:56:19,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:19,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:56:19,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:19,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:56:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:19,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:56:19,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:19,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:56:19,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:19,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 04:56:19,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:19,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:56:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:19,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-19 04:56:19,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:19,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-19 04:56:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:19,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-19 04:56:19,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:19,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-19 04:56:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:19,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-19 04:56:19,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:19,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-19 04:56:20,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:20,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-19 04:56:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:20,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-19 04:56:20,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-19 04:56:20,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:56:20,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099552231] [2021-11-19 04:56:20,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099552231] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:56:20,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:56:20,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-19 04:56:20,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368522810] [2021-11-19 04:56:20,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:56:20,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 04:56:20,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:56:20,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 04:56:20,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:56:20,249 INFO L87 Difference]: Start difference. First operand 252 states and 300 transitions. Second operand has 14 states, 13 states have (on average 4.538461538461538) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-19 04:56:23,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:56:23,130 INFO L93 Difference]: Finished difference Result 258 states and 305 transitions. [2021-11-19 04:56:23,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 04:56:23,130 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.538461538461538) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 131 [2021-11-19 04:56:23,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:56:23,147 INFO L225 Difference]: With dead ends: 258 [2021-11-19 04:56:23,148 INFO L226 Difference]: Without dead ends: 256 [2021-11-19 04:56:23,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-11-19 04:56:23,149 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 67 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:56:23,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 858 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-19 04:56:23,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-19 04:56:23,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2021-11-19 04:56:23,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 178 states have (on average 1.0842696629213484) internal successors, (193), 184 states have internal predecessors, (193), 50 states have call successors, (50), 23 states have call predecessors, (50), 27 states have return successors, (60), 48 states have call predecessors, (60), 48 states have call successors, (60) [2021-11-19 04:56:23,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 303 transitions. [2021-11-19 04:56:23,176 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 303 transitions. Word has length 131 [2021-11-19 04:56:23,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:56:23,177 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 303 transitions. [2021-11-19 04:56:23,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.538461538461538) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-19 04:56:23,177 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 303 transitions. [2021-11-19 04:56:23,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-19 04:56:23,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:56:23,179 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:56:23,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-19 04:56:23,180 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:56:23,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:56:23,180 INFO L85 PathProgramCache]: Analyzing trace with hash 59693077, now seen corresponding path program 1 times [2021-11-19 04:56:23,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:56:23,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165224685] [2021-11-19 04:56:23,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:56:23,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:56:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:23,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:56:23,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:23,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:56:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:23,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:56:23,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:23,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:56:23,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:23,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 04:56:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:23,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:56:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:23,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-19 04:56:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:23,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-19 04:56:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:23,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:56:23,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:23,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:56:23,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:23,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:56:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:23,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-19 04:56:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:23,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 04:56:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:23,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-19 04:56:23,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:23,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 04:56:23,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:23,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-11-19 04:56:23,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:23,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-19 04:56:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:23,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-11-19 04:56:23,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:23,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-11-19 04:56:23,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:23,843 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-11-19 04:56:23,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:56:23,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165224685] [2021-11-19 04:56:23,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165224685] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:56:23,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:56:23,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-19 04:56:23,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700840668] [2021-11-19 04:56:23,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:56:23,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 04:56:23,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:56:23,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 04:56:23,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:56:23,847 INFO L87 Difference]: Start difference. First operand 256 states and 303 transitions. Second operand has 12 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 7 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-19 04:56:25,907 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:56:27,965 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:56:30,034 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:56:32,116 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:56:34,189 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:56:35,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:56:35,228 INFO L93 Difference]: Finished difference Result 273 states and 322 transitions. [2021-11-19 04:56:35,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 04:56:35,229 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 7 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 6 states have call successors, (19) Word has length 149 [2021-11-19 04:56:35,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:56:35,231 INFO L225 Difference]: With dead ends: 273 [2021-11-19 04:56:35,232 INFO L226 Difference]: Without dead ends: 232 [2021-11-19 04:56:35,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:56:35,233 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 102 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 98 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:56:35,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 341 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 596 Invalid, 5 Unknown, 0 Unchecked, 11.2s Time] [2021-11-19 04:56:35,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-19 04:56:35,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 222. [2021-11-19 04:56:35,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 158 states have (on average 1.0886075949367089) internal successors, (172), 164 states have internal predecessors, (172), 39 states have call successors, (39), 21 states have call predecessors, (39), 24 states have return successors, (47), 36 states have call predecessors, (47), 37 states have call successors, (47) [2021-11-19 04:56:35,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 258 transitions. [2021-11-19 04:56:35,257 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 258 transitions. Word has length 149 [2021-11-19 04:56:35,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:56:35,257 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 258 transitions. [2021-11-19 04:56:35,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 7 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (19), 4 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-19 04:56:35,258 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 258 transitions. [2021-11-19 04:56:35,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-19 04:56:35,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:56:35,260 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:56:35,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-19 04:56:35,260 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:56:35,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:56:35,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1529409860, now seen corresponding path program 1 times [2021-11-19 04:56:35,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:56:35,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168906603] [2021-11-19 04:56:35,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:56:35,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:56:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:35,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:56:35,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:35,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:56:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:35,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:56:35,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:35,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:56:35,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:35,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 04:56:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:35,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:56:35,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:35,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-19 04:56:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:35,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-19 04:56:35,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:35,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:56:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:35,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:56:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:35,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 04:56:35,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:35,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-19 04:56:35,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:35,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-19 04:56:35,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:35,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-19 04:56:35,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:35,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-19 04:56:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:35,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-19 04:56:35,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:35,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-11-19 04:56:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:35,862 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-19 04:56:35,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:56:35,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168906603] [2021-11-19 04:56:35,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168906603] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:56:35,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:56:35,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-19 04:56:35,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314363598] [2021-11-19 04:56:35,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:56:35,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 04:56:35,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:56:35,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 04:56:35,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:56:35,865 INFO L87 Difference]: Start difference. First operand 222 states and 258 transitions. Second operand has 15 states, 14 states have (on average 4.642857142857143) internal successors, (65), 11 states have internal predecessors, (65), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-19 04:56:37,205 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:56:38,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:56:38,198 INFO L93 Difference]: Finished difference Result 228 states and 263 transitions. [2021-11-19 04:56:38,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 04:56:38,199 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.642857142857143) internal successors, (65), 11 states have internal predecessors, (65), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) Word has length 151 [2021-11-19 04:56:38,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:56:38,201 INFO L225 Difference]: With dead ends: 228 [2021-11-19 04:56:38,201 INFO L226 Difference]: Without dead ends: 226 [2021-11-19 04:56:38,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-11-19 04:56:38,203 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 110 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:56:38,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 752 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-19 04:56:38,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-19 04:56:38,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 221. [2021-11-19 04:56:38,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 158 states have (on average 1.0886075949367089) internal successors, (172), 164 states have internal predecessors, (172), 38 states have call successors, (38), 21 states have call predecessors, (38), 24 states have return successors, (46), 35 states have call predecessors, (46), 36 states have call successors, (46) [2021-11-19 04:56:38,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 256 transitions. [2021-11-19 04:56:38,223 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 256 transitions. Word has length 151 [2021-11-19 04:56:38,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:56:38,226 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 256 transitions. [2021-11-19 04:56:38,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.642857142857143) internal successors, (65), 11 states have internal predecessors, (65), 2 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-19 04:56:38,226 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 256 transitions. [2021-11-19 04:56:38,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-19 04:56:38,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:56:38,228 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:56:38,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-19 04:56:38,229 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:56:38,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:56:38,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1434041611, now seen corresponding path program 1 times [2021-11-19 04:56:38,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:56:38,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959075387] [2021-11-19 04:56:38,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:56:38,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:56:38,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:38,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:56:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:38,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:56:38,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:38,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:56:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:38,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:56:38,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:38,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 04:56:38,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:38,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:56:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:38,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-19 04:56:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:38,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-19 04:56:38,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:38,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:56:38,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:38,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:56:38,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:38,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 04:56:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:38,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-19 04:56:38,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:38,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-19 04:56:38,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:38,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:56:38,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:38,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:56:38,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:38,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-19 04:56:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:38,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-19 04:56:38,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:38,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-11-19 04:56:38,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:38,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-19 04:56:38,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:38,938 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-19 04:56:38,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:56:38,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959075387] [2021-11-19 04:56:38,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959075387] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:56:38,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918747099] [2021-11-19 04:56:38,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:56:38,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:56:38,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:56:38,941 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:56:38,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 04:56:39,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:56:39,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 2743 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-19 04:56:39,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:56:39,961 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-19 04:56:39,962 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 33 treesize of output 36 [2021-11-19 04:56:40,394 INFO L354 Elim1Store]: treesize reduction 212, result has 36.3 percent of original size [2021-11-19 04:56:40,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 102 treesize of output 194 [2021-11-19 04:56:42,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:42,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:42,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:42,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 32 [2021-11-19 04:56:42,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:42,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:42,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:42,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 39 [2021-11-19 04:56:42,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:42,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:42,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:42,899 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-19 04:56:42,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 52 [2021-11-19 04:56:43,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:43,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:43,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:43,334 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-11-19 04:56:43,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 92 treesize of output 54 [2021-11-19 04:56:43,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:43,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:43,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 41 [2021-11-19 04:56:44,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:44,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:56:44,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:44,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:44,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:44,061 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-11-19 04:56:44,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 41 [2021-11-19 04:56:44,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:44,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:44,552 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-11-19 04:56:44,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 48 [2021-11-19 04:56:44,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:44,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:44,805 INFO L354 Elim1Store]: treesize reduction 108, result has 0.9 percent of original size [2021-11-19 04:56:44,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 99 treesize of output 61 [2021-11-19 04:56:45,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:45,942 INFO L354 Elim1Store]: treesize reduction 53, result has 20.9 percent of original size [2021-11-19 04:56:45,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 73 [2021-11-19 04:56:46,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:46,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:46,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 50 [2021-11-19 04:56:46,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:46,130 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-19 04:56:46,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 57 [2021-11-19 04:56:46,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:46,171 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-19 04:56:46,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 47 [2021-11-19 04:56:46,405 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-19 04:56:46,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 44 [2021-11-19 04:56:46,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:46,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 37 [2021-11-19 04:56:46,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:46,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:46,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:56:46,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 50 [2021-11-19 04:56:46,569 INFO L354 Elim1Store]: treesize reduction 100, result has 22.5 percent of original size [2021-11-19 04:56:46,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 100 treesize of output 94 [2021-11-19 04:56:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 79 proven. 44 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-19 04:56:48,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:56:53,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918747099] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:56:53,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:56:53,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 23 [2021-11-19 04:56:53,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78581763] [2021-11-19 04:56:53,738 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:56:53,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-19 04:56:53,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:56:53,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-19 04:56:53,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=710, Unknown=2, NotChecked=0, Total=812 [2021-11-19 04:56:53,741 INFO L87 Difference]: Start difference. First operand 221 states and 256 transitions. Second operand has 23 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 21 states have internal predecessors, (123), 9 states have call successors, (38), 7 states have call predecessors, (38), 8 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2021-11-19 04:56:55,605 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:56:56,730 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:57:00,408 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:57:02,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:57:02,624 INFO L93 Difference]: Finished difference Result 321 states and 365 transitions. [2021-11-19 04:57:02,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-19 04:57:02,625 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 21 states have internal predecessors, (123), 9 states have call successors, (38), 7 states have call predecessors, (38), 8 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) Word has length 155 [2021-11-19 04:57:02,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:57:02,627 INFO L225 Difference]: With dead ends: 321 [2021-11-19 04:57:02,627 INFO L226 Difference]: Without dead ends: 237 [2021-11-19 04:57:02,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 206 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=329, Invalid=1831, Unknown=2, NotChecked=0, Total=2162 [2021-11-19 04:57:02,629 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 135 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 1363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 371 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:57:02,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 489 Invalid, 1363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 936 Invalid, 0 Unknown, 371 Unchecked, 7.8s Time] [2021-11-19 04:57:02,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-11-19 04:57:02,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 222. [2021-11-19 04:57:02,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 159 states have (on average 1.0754716981132075) internal successors, (171), 164 states have internal predecessors, (171), 38 states have call successors, (38), 22 states have call predecessors, (38), 24 states have return successors, (45), 35 states have call predecessors, (45), 36 states have call successors, (45) [2021-11-19 04:57:02,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 254 transitions. [2021-11-19 04:57:02,654 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 254 transitions. Word has length 155 [2021-11-19 04:57:02,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:57:02,655 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 254 transitions. [2021-11-19 04:57:02,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 21 states have internal predecessors, (123), 9 states have call successors, (38), 7 states have call predecessors, (38), 8 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2021-11-19 04:57:02,655 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 254 transitions. [2021-11-19 04:57:02,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-19 04:57:02,657 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:57:02,658 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:57:02,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-19 04:57:02,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-19 04:57:02,874 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:57:02,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:57:02,874 INFO L85 PathProgramCache]: Analyzing trace with hash 829993090, now seen corresponding path program 1 times [2021-11-19 04:57:02,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:57:02,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375237949] [2021-11-19 04:57:02,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:57:02,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:57:03,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:03,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 04:57:03,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:03,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:57:03,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:03,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 04:57:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:03,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:57:03,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:03,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 04:57:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:03,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:57:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:03,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-19 04:57:03,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:03,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-19 04:57:03,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:03,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:57:03,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:03,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:57:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:03,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 04:57:03,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:03,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-19 04:57:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:03,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-19 04:57:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:03,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-19 04:57:03,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:03,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-19 04:57:03,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:03,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-19 04:57:03,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:03,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-11-19 04:57:03,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:03,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-11-19 04:57:03,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:03,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-19 04:57:03,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:03,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-19 04:57:03,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-11-19 04:57:03,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:57:03,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375237949] [2021-11-19 04:57:03,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375237949] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:57:03,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346367645] [2021-11-19 04:57:03,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:57:03,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:57:03,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:57:03,628 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:57:03,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4154d12e-108a-49a9-8557-d013d7d37101/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-19 04:57:04,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:57:04,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 2785 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-19 04:57:04,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:57:04,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 04:57:04,402 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 04:57:04,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-19 04:57:05,006 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 04:57:05,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-19 04:57:05,064 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 22 treesize of output 21 [2021-11-19 04:57:07,402 INFO L354 Elim1Store]: treesize reduction 256, result has 23.1 percent of original size [2021-11-19 04:57:07,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 87 treesize of output 139 [2021-11-19 04:57:08,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:57:08,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:57:08,375 INFO L354 Elim1Store]: treesize reduction 69, result has 16.9 percent of original size [2021-11-19 04:57:08,376 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 6 case distinctions, treesize of input 73 treesize of output 53 [2021-11-19 04:57:08,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:57:08,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:57:08,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:57:08,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 30 [2021-11-19 04:57:08,662 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 04:57:09,711 INFO L354 Elim1Store]: treesize reduction 89, result has 13.6 percent of original size [2021-11-19 04:57:09,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 98 treesize of output 78 [2021-11-19 04:57:09,915 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-19 04:57:09,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 42 [2021-11-19 04:57:09,932 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-19 04:57:09,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 56 [2021-11-19 04:57:23,076 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 34 treesize of output 19 [2021-11-19 04:57:25,803 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 34 treesize of output 19 [2021-11-19 04:57:26,050 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 34 treesize of output 19 [2021-11-19 04:57:30,529 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 34 treesize of output 19 [2021-11-19 04:57:30,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:57:32,444 INFO L354 Elim1Store]: treesize reduction 1604, result has 11.8 percent of original size [2021-11-19 04:57:32,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 1 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 90 case distinctions, treesize of input 188 treesize of output 309