./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--dm-cache.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--dm-cache.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 18adc7ce46ffd1a3ff82c3c7fa6ef66e3ed2399c064dd9dfbe8501509215a2b1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:32:30,404 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:32:30,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:32:30,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:32:30,438 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:32:30,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:32:30,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:32:30,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:32:30,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:32:30,448 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:32:30,449 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:32:30,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:32:30,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:32:30,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:32:30,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:32:30,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:32:30,457 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:32:30,458 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:32:30,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:32:30,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:32:30,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:32:30,470 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:32:30,471 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:32:30,472 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:32:30,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:32:30,477 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:32:30,477 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:32:30,478 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:32:30,479 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:32:30,480 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:32:30,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:32:30,489 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:32:30,491 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:32:30,493 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:32:30,494 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:32:30,495 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:32:30,496 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:32:30,496 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:32:30,496 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:32:30,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:32:30,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:32:30,499 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:32:30,555 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:32:30,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:32:30,557 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:32:30,558 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:32:30,559 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:32:30,559 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:32:30,559 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:32:30,559 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:32:30,559 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:32:30,560 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:32:30,561 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:32:30,561 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:32:30,561 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:32:30,561 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:32:30,562 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:32:30,562 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:32:30,562 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:32:30,562 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:32:30,563 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:32:30,563 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:32:30,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:32:30,564 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:32:30,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:32:30,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:32:30,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:32:30,565 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:32:30,566 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:32:30,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:32:30,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:32:30,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:32:30,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:32:30,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:32:30,568 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:32:30,568 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:32:30,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:32:30,569 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:32:30,569 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:32:30,569 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:32:30,569 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 18adc7ce46ffd1a3ff82c3c7fa6ef66e3ed2399c064dd9dfbe8501509215a2b1 [2021-11-23 02:32:30,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:32:30,931 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:32:30,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:32:30,935 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:32:30,936 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:32:30,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--dm-cache.ko-entry_point.cil.out.i [2021-11-23 02:32:31,002 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/data/0e8b18419/40e805d98ce040c5a4f7063c7a6f9166/FLAGe5e506cc4 [2021-11-23 02:32:32,236 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:32:32,237 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--dm-cache.ko-entry_point.cil.out.i [2021-11-23 02:32:32,311 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/data/0e8b18419/40e805d98ce040c5a4f7063c7a6f9166/FLAGe5e506cc4 [2021-11-23 02:32:32,404 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/data/0e8b18419/40e805d98ce040c5a4f7063c7a6f9166 [2021-11-23 02:32:32,407 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:32:32,410 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:32:32,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:32:32,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:32:32,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:32:32,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:32:32" (1/1) ... [2021-11-23 02:32:32,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24a68ff6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:32, skipping insertion in model container [2021-11-23 02:32:32,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:32:32" (1/1) ... [2021-11-23 02:32:32,430 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:32:32,668 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:32:36,851 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_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--dm-cache.ko-entry_point.cil.out.i[376341,376354] [2021-11-23 02:32:36,919 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:32:36,974 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:32:37,671 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_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--dm-cache.ko-entry_point.cil.out.i[376341,376354] [2021-11-23 02:32:37,687 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:32:38,026 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:32:38,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:38 WrapperNode [2021-11-23 02:32:38,027 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:32:38,029 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:32:38,029 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:32:38,029 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:32:38,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:38" (1/1) ... [2021-11-23 02:32:38,275 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:38" (1/1) ... [2021-11-23 02:32:38,730 INFO L137 Inliner]: procedures = 595, calls = 3937, calls flagged for inlining = 264, calls inlined = 257, statements flattened = 9795 [2021-11-23 02:32:38,731 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:32:38,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:32:38,733 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:32:38,733 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:32:38,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:38" (1/1) ... [2021-11-23 02:32:38,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:38" (1/1) ... [2021-11-23 02:32:38,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:38" (1/1) ... [2021-11-23 02:32:38,821 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:38" (1/1) ... [2021-11-23 02:32:39,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:38" (1/1) ... [2021-11-23 02:32:39,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:38" (1/1) ... [2021-11-23 02:32:39,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:38" (1/1) ... [2021-11-23 02:32:39,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:32:39,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:32:39,239 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:32:39,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:32:39,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:38" (1/1) ... [2021-11-23 02:32:39,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:32:39,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:32:39,279 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:32:39,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:32:39,427 INFO L130 BoogieDeclarations]: Found specification of procedure resize_cache_dev [2021-11-23 02:32:39,427 INFO L138 BoogieDeclarations]: Found implementation of procedure resize_cache_dev [2021-11-23 02:32:39,428 INFO L130 BoogieDeclarations]: Found specification of procedure block_size_is_power_of_two [2021-11-23 02:32:39,428 INFO L138 BoogieDeclarations]: Found implementation of procedure block_size_is_power_of_two [2021-11-23 02:32:39,428 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2021-11-23 02:32:39,428 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2021-11-23 02:32:39,428 INFO L130 BoogieDeclarations]: Found specification of procedure dm_block_manager_destroy [2021-11-23 02:32:39,428 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_block_manager_destroy [2021-11-23 02:32:39,428 INFO L130 BoogieDeclarations]: Found specification of procedure bio_endio [2021-11-23 02:32:39,428 INFO L138 BoogieDeclarations]: Found implementation of procedure bio_endio [2021-11-23 02:32:39,429 INFO L130 BoogieDeclarations]: Found specification of procedure __copy_sm_root [2021-11-23 02:32:39,429 INFO L138 BoogieDeclarations]: Found implementation of procedure __copy_sm_root [2021-11-23 02:32:39,429 INFO L130 BoogieDeclarations]: Found specification of procedure bio_writes_complete_block [2021-11-23 02:32:39,429 INFO L138 BoogieDeclarations]: Found implementation of procedure bio_writes_complete_block [2021-11-23 02:32:39,429 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-23 02:32:39,429 INFO L130 BoogieDeclarations]: Found specification of procedure dm_tm_pre_commit [2021-11-23 02:32:39,429 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_tm_pre_commit [2021-11-23 02:32:39,430 INFO L130 BoogieDeclarations]: Found specification of procedure i_size_read [2021-11-23 02:32:39,430 INFO L138 BoogieDeclarations]: Found implementation of procedure i_size_read [2021-11-23 02:32:39,430 INFO L130 BoogieDeclarations]: Found specification of procedure cache_map [2021-11-23 02:32:39,430 INFO L138 BoogieDeclarations]: Found implementation of procedure cache_map [2021-11-23 02:32:39,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 02:32:39,430 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 02:32:39,430 INFO L130 BoogieDeclarations]: Found specification of procedure process_migrations [2021-11-23 02:32:39,431 INFO L138 BoogieDeclarations]: Found implementation of procedure process_migrations [2021-11-23 02:32:39,431 INFO L130 BoogieDeclarations]: Found specification of procedure remap_cell_to_origin_clear_discard [2021-11-23 02:32:39,431 INFO L138 BoogieDeclarations]: Found implementation of procedure remap_cell_to_origin_clear_discard [2021-11-23 02:32:39,431 INFO L130 BoogieDeclarations]: Found specification of procedure dm_bm_checksum [2021-11-23 02:32:39,431 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_bm_checksum [2021-11-23 02:32:39,431 INFO L130 BoogieDeclarations]: Found specification of procedure variable_test_bit [2021-11-23 02:32:39,431 INFO L138 BoogieDeclarations]: Found implementation of procedure variable_test_bit [2021-11-23 02:32:39,431 INFO L130 BoogieDeclarations]: Found specification of procedure put_policy [2021-11-23 02:32:39,432 INFO L138 BoogieDeclarations]: Found implementation of procedure put_policy [2021-11-23 02:32:39,432 INFO L130 BoogieDeclarations]: Found specification of procedure check_if_tick_bio_needed [2021-11-23 02:32:39,432 INFO L138 BoogieDeclarations]: Found implementation of procedure check_if_tick_bio_needed [2021-11-23 02:32:39,432 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:32:39,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:32:39,432 INFO L130 BoogieDeclarations]: Found specification of procedure update_flags [2021-11-23 02:32:39,432 INFO L138 BoogieDeclarations]: Found implementation of procedure update_flags [2021-11-23 02:32:39,433 INFO L130 BoogieDeclarations]: Found specification of procedure calc_discard_block_range [2021-11-23 02:32:39,433 INFO L138 BoogieDeclarations]: Found implementation of procedure calc_discard_block_range [2021-11-23 02:32:39,433 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~~sector_t~0~X~~sector_t~0~X~$Pointer$~TO~int [2021-11-23 02:32:39,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~~sector_t~0~X~~sector_t~0~X~$Pointer$~TO~int [2021-11-23 02:32:39,433 INFO L130 BoogieDeclarations]: Found specification of procedure dm_cell_release_no_holder [2021-11-23 02:32:39,433 INFO L130 BoogieDeclarations]: Found specification of procedure free_bitset [2021-11-23 02:32:39,433 INFO L138 BoogieDeclarations]: Found implementation of procedure free_bitset [2021-11-23 02:32:39,434 INFO L130 BoogieDeclarations]: Found specification of procedure commit_if_needed [2021-11-23 02:32:39,434 INFO L138 BoogieDeclarations]: Found implementation of procedure commit_if_needed [2021-11-23 02:32:39,434 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_1 [2021-11-23 02:32:39,434 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_1 [2021-11-23 02:32:39,434 INFO L130 BoogieDeclarations]: Found specification of procedure __might_sleep [2021-11-23 02:32:39,434 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_sleep [2021-11-23 02:32:39,434 INFO L130 BoogieDeclarations]: Found specification of procedure get_per_bio_data [2021-11-23 02:32:39,434 INFO L138 BoogieDeclarations]: Found implementation of procedure get_per_bio_data [2021-11-23 02:32:39,435 INFO L130 BoogieDeclarations]: Found specification of procedure remap_to_origin_then_cache [2021-11-23 02:32:39,435 INFO L138 BoogieDeclarations]: Found implementation of procedure remap_to_origin_then_cache [2021-11-23 02:32:39,435 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~int [2021-11-23 02:32:39,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~int [2021-11-23 02:32:39,435 INFO L130 BoogieDeclarations]: Found specification of procedure dm_cache_remove_mapping [2021-11-23 02:32:39,435 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_cache_remove_mapping [2021-11-23 02:32:39,435 INFO L130 BoogieDeclarations]: Found specification of procedure dblock_to_oblock [2021-11-23 02:32:39,435 INFO L138 BoogieDeclarations]: Found implementation of procedure dblock_to_oblock [2021-11-23 02:32:39,436 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-23 02:32:39,436 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-23 02:32:39,436 INFO L130 BoogieDeclarations]: Found specification of procedure remap_to_origin [2021-11-23 02:32:39,436 INFO L138 BoogieDeclarations]: Found implementation of procedure remap_to_origin [2021-11-23 02:32:39,436 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bitset [2021-11-23 02:32:39,436 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bitset [2021-11-23 02:32:39,436 INFO L130 BoogieDeclarations]: Found specification of procedure bio_detain_range [2021-11-23 02:32:39,437 INFO L138 BoogieDeclarations]: Found implementation of procedure bio_detain_range [2021-11-23 02:32:39,437 INFO L130 BoogieDeclarations]: Found specification of procedure from_cblock [2021-11-23 02:32:39,437 INFO L138 BoogieDeclarations]: Found implementation of procedure from_cblock [2021-11-23 02:32:39,437 INFO L130 BoogieDeclarations]: Found specification of procedure writethrough_mode [2021-11-23 02:32:39,437 INFO L138 BoogieDeclarations]: Found implementation of procedure writethrough_mode [2021-11-23 02:32:39,437 INFO L130 BoogieDeclarations]: Found specification of procedure write_dirty_bitset [2021-11-23 02:32:39,437 INFO L138 BoogieDeclarations]: Found implementation of procedure write_dirty_bitset [2021-11-23 02:32:39,437 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-23 02:32:39,438 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-23 02:32:39,438 INFO L130 BoogieDeclarations]: Found specification of procedure writeback_mode [2021-11-23 02:32:39,438 INFO L138 BoogieDeclarations]: Found implementation of procedure writeback_mode [2021-11-23 02:32:39,438 INFO L130 BoogieDeclarations]: Found specification of procedure cache_postsuspend [2021-11-23 02:32:39,438 INFO L138 BoogieDeclarations]: Found implementation of procedure cache_postsuspend [2021-11-23 02:32:39,438 INFO L130 BoogieDeclarations]: Found specification of procedure prealloc_get_migration [2021-11-23 02:32:39,438 INFO L138 BoogieDeclarations]: Found implementation of procedure prealloc_get_migration [2021-11-23 02:32:39,438 INFO L130 BoogieDeclarations]: Found specification of procedure issue_copy_or_discard [2021-11-23 02:32:39,439 INFO L138 BoogieDeclarations]: Found implementation of procedure issue_copy_or_discard [2021-11-23 02:32:39,439 INFO L130 BoogieDeclarations]: Found specification of procedure cache_dtr [2021-11-23 02:32:39,439 INFO L138 BoogieDeclarations]: Found implementation of procedure cache_dtr [2021-11-23 02:32:39,439 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec_and_test [2021-11-23 02:32:39,439 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec_and_test [2021-11-23 02:32:39,439 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-23 02:32:39,439 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_prison_cell [2021-11-23 02:32:39,439 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_prison_cell [2021-11-23 02:32:39,440 INFO L130 BoogieDeclarations]: Found specification of procedure dm_cache_policy_get_version [2021-11-23 02:32:39,440 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_cache_policy_get_version [2021-11-23 02:32:39,440 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-23 02:32:39,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-23 02:32:39,440 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-23 02:32:39,440 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-23 02:32:39,440 INFO L130 BoogieDeclarations]: Found specification of procedure __create_persistent_data_objects [2021-11-23 02:32:39,441 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_persistent_data_objects [2021-11-23 02:32:39,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:32:39,441 INFO L130 BoogieDeclarations]: Found specification of procedure get_per_bio_data_size [2021-11-23 02:32:39,441 INFO L138 BoogieDeclarations]: Found implementation of procedure get_per_bio_data_size [2021-11-23 02:32:39,441 INFO L130 BoogieDeclarations]: Found specification of procedure dm_array_resize [2021-11-23 02:32:39,441 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_array_resize [2021-11-23 02:32:39,441 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-23 02:32:39,441 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-23 02:32:39,442 INFO L130 BoogieDeclarations]: Found specification of procedure accounted_request [2021-11-23 02:32:39,442 INFO L138 BoogieDeclarations]: Found implementation of procedure accounted_request [2021-11-23 02:32:39,442 INFO L130 BoogieDeclarations]: Found specification of procedure pack_value [2021-11-23 02:32:39,442 INFO L138 BoogieDeclarations]: Found implementation of procedure pack_value [2021-11-23 02:32:39,442 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-11-23 02:32:39,442 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-11-23 02:32:39,442 INFO L130 BoogieDeclarations]: Found specification of procedure bio_list_empty [2021-11-23 02:32:39,442 INFO L138 BoogieDeclarations]: Found implementation of procedure bio_list_empty [2021-11-23 02:32:39,443 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 02:32:39,443 INFO L130 BoogieDeclarations]: Found specification of procedure clear_discard [2021-11-23 02:32:39,443 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_discard [2021-11-23 02:32:39,443 INFO L130 BoogieDeclarations]: Found specification of procedure prealloc_get_cell [2021-11-23 02:32:39,443 INFO L138 BoogieDeclarations]: Found implementation of procedure prealloc_get_cell [2021-11-23 02:32:39,443 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-23 02:32:39,443 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-23 02:32:39,443 INFO L130 BoogieDeclarations]: Found specification of procedure process_deferred_flush_bios [2021-11-23 02:32:39,444 INFO L138 BoogieDeclarations]: Found implementation of procedure process_deferred_flush_bios [2021-11-23 02:32:39,444 INFO L130 BoogieDeclarations]: Found specification of procedure cell_defer [2021-11-23 02:32:39,444 INFO L138 BoogieDeclarations]: Found implementation of procedure cell_defer [2021-11-23 02:32:39,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:32:39,444 INFO L130 BoogieDeclarations]: Found specification of procedure dm_tm_commit [2021-11-23 02:32:39,444 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_tm_commit [2021-11-23 02:32:39,444 INFO L130 BoogieDeclarations]: Found specification of procedure sb_check [2021-11-23 02:32:39,444 INFO L138 BoogieDeclarations]: Found implementation of procedure sb_check [2021-11-23 02:32:39,444 INFO L130 BoogieDeclarations]: Found specification of procedure dm_cache_policy_destroy [2021-11-23 02:32:39,445 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_cache_policy_destroy [2021-11-23 02:32:39,445 INFO L130 BoogieDeclarations]: Found specification of procedure cache_device_name [2021-11-23 02:32:39,445 INFO L138 BoogieDeclarations]: Found implementation of procedure cache_device_name [2021-11-23 02:32:39,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:32:39,445 INFO L130 BoogieDeclarations]: Found specification of procedure get_policy_once [2021-11-23 02:32:39,445 INFO L138 BoogieDeclarations]: Found implementation of procedure get_policy_once [2021-11-23 02:32:39,445 INFO L130 BoogieDeclarations]: Found specification of procedure issue [2021-11-23 02:32:39,445 INFO L138 BoogieDeclarations]: Found implementation of procedure issue [2021-11-23 02:32:39,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 02:32:39,446 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 02:32:39,446 INFO L130 BoogieDeclarations]: Found specification of procedure inc_and_issue [2021-11-23 02:32:39,446 INFO L138 BoogieDeclarations]: Found implementation of procedure inc_and_issue [2021-11-23 02:32:39,446 INFO L130 BoogieDeclarations]: Found specification of procedure write_discard_bitset [2021-11-23 02:32:39,446 INFO L138 BoogieDeclarations]: Found implementation of procedure write_discard_bitset [2021-11-23 02:32:39,446 INFO L130 BoogieDeclarations]: Found specification of procedure sync_metadata [2021-11-23 02:32:39,446 INFO L138 BoogieDeclarations]: Found implementation of procedure sync_metadata [2021-11-23 02:32:39,447 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait_event [2021-11-23 02:32:39,447 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait_event [2021-11-23 02:32:39,447 INFO L130 BoogieDeclarations]: Found specification of procedure set_discard_range [2021-11-23 02:32:39,447 INFO L138 BoogieDeclarations]: Found implementation of procedure set_discard_range [2021-11-23 02:32:39,447 INFO L130 BoogieDeclarations]: Found specification of procedure policy_unchanged [2021-11-23 02:32:39,447 INFO L138 BoogieDeclarations]: Found implementation of procedure policy_unchanged [2021-11-23 02:32:39,447 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2021-11-23 02:32:39,447 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2021-11-23 02:32:39,448 INFO L130 BoogieDeclarations]: Found specification of procedure set_config_value [2021-11-23 02:32:39,448 INFO L138 BoogieDeclarations]: Found implementation of procedure set_config_value [2021-11-23 02:32:39,448 INFO L130 BoogieDeclarations]: Found specification of procedure stop_worker [2021-11-23 02:32:39,448 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_worker [2021-11-23 02:32:39,448 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_destroy_workqueue_12 [2021-11-23 02:32:39,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_destroy_workqueue_12 [2021-11-23 02:32:39,448 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-23 02:32:39,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-23 02:32:39,449 INFO L130 BoogieDeclarations]: Found specification of procedure policy_force_mapping [2021-11-23 02:32:39,449 INFO L138 BoogieDeclarations]: Found implementation of procedure policy_force_mapping [2021-11-23 02:32:39,449 INFO L130 BoogieDeclarations]: Found specification of procedure remap_to_origin_clear_discard [2021-11-23 02:32:39,449 INFO L138 BoogieDeclarations]: Found implementation of procedure remap_to_origin_clear_discard [2021-11-23 02:32:39,449 INFO L130 BoogieDeclarations]: Found specification of procedure __save_sm_root [2021-11-23 02:32:39,449 INFO L138 BoogieDeclarations]: Found implementation of procedure __save_sm_root [2021-11-23 02:32:39,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:32:39,450 INFO L130 BoogieDeclarations]: Found specification of procedure up_read [2021-11-23 02:32:39,450 INFO L138 BoogieDeclarations]: Found implementation of procedure up_read [2021-11-23 02:32:39,450 INFO L130 BoogieDeclarations]: Found specification of procedure blocks_are_unmapped_or_clean [2021-11-23 02:32:39,450 INFO L138 BoogieDeclarations]: Found implementation of procedure blocks_are_unmapped_or_clean [2021-11-23 02:32:39,450 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-11-23 02:32:39,450 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-11-23 02:32:39,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:32:39,450 INFO L130 BoogieDeclarations]: Found specification of procedure do_worker [2021-11-23 02:32:39,451 INFO L138 BoogieDeclarations]: Found implementation of procedure do_worker [2021-11-23 02:32:39,451 INFO L130 BoogieDeclarations]: Found specification of procedure list_splice_init [2021-11-23 02:32:39,451 INFO L138 BoogieDeclarations]: Found implementation of procedure list_splice_init [2021-11-23 02:32:39,451 INFO L130 BoogieDeclarations]: Found specification of procedure build_key [2021-11-23 02:32:39,451 INFO L138 BoogieDeclarations]: Found implementation of procedure build_key [2021-11-23 02:32:39,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:32:39,451 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 02:32:39,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 02:32:39,452 INFO L130 BoogieDeclarations]: Found specification of procedure write_hints [2021-11-23 02:32:39,452 INFO L138 BoogieDeclarations]: Found implementation of procedure write_hints [2021-11-23 02:32:39,452 INFO L130 BoogieDeclarations]: Found specification of procedure ___ratelimit [2021-11-23 02:32:39,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ___ratelimit [2021-11-23 02:32:39,452 INFO L130 BoogieDeclarations]: Found specification of procedure __find_policy [2021-11-23 02:32:39,452 INFO L138 BoogieDeclarations]: Found implementation of procedure __find_policy [2021-11-23 02:32:39,453 INFO L130 BoogieDeclarations]: Found specification of procedure policy_tick [2021-11-23 02:32:39,453 INFO L138 BoogieDeclarations]: Found implementation of procedure policy_tick [2021-11-23 02:32:39,453 INFO L130 BoogieDeclarations]: Found specification of procedure cache_resume [2021-11-23 02:32:39,453 INFO L138 BoogieDeclarations]: Found implementation of procedure cache_resume [2021-11-23 02:32:39,453 INFO L130 BoogieDeclarations]: Found specification of procedure __list_splice [2021-11-23 02:32:39,453 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_splice [2021-11-23 02:32:39,453 INFO L130 BoogieDeclarations]: Found specification of procedure dm_cache_metadata_close [2021-11-23 02:32:39,454 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_cache_metadata_close [2021-11-23 02:32:39,454 INFO L130 BoogieDeclarations]: Found specification of procedure dm_cache_policy_get_hint_size [2021-11-23 02:32:39,454 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_cache_policy_get_hint_size [2021-11-23 02:32:39,454 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-11-23 02:32:39,454 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-11-23 02:32:39,454 INFO L130 BoogieDeclarations]: Found specification of procedure bio_list_pop [2021-11-23 02:32:39,454 INFO L138 BoogieDeclarations]: Found implementation of procedure bio_list_pop [2021-11-23 02:32:39,455 INFO L130 BoogieDeclarations]: Found specification of procedure free_migration [2021-11-23 02:32:39,455 INFO L138 BoogieDeclarations]: Found implementation of procedure free_migration [2021-11-23 02:32:39,455 INFO L130 BoogieDeclarations]: Found specification of procedure __init_work [2021-11-23 02:32:39,455 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_work [2021-11-23 02:32:39,455 INFO L130 BoogieDeclarations]: Found specification of procedure passthrough_mode [2021-11-23 02:32:39,455 INFO L138 BoogieDeclarations]: Found implementation of procedure passthrough_mode [2021-11-23 02:32:39,455 INFO L130 BoogieDeclarations]: Found specification of procedure get_cache_mode [2021-11-23 02:32:39,455 INFO L138 BoogieDeclarations]: Found implementation of procedure get_cache_mode [2021-11-23 02:32:39,456 INFO L130 BoogieDeclarations]: Found specification of procedure to_cblock [2021-11-23 02:32:39,456 INFO L138 BoogieDeclarations]: Found implementation of procedure to_cblock [2021-11-23 02:32:39,456 INFO L130 BoogieDeclarations]: Found specification of procedure cache_iterate_devices [2021-11-23 02:32:39,456 INFO L138 BoogieDeclarations]: Found implementation of procedure cache_iterate_devices [2021-11-23 02:32:39,456 INFO L130 BoogieDeclarations]: Found specification of procedure to_oblock [2021-11-23 02:32:39,456 INFO L138 BoogieDeclarations]: Found implementation of procedure to_oblock [2021-11-23 02:32:39,456 INFO L130 BoogieDeclarations]: Found specification of procedure down_write [2021-11-23 02:32:39,457 INFO L138 BoogieDeclarations]: Found implementation of procedure down_write [2021-11-23 02:32:39,457 INFO L130 BoogieDeclarations]: Found specification of procedure block_div [2021-11-23 02:32:39,457 INFO L138 BoogieDeclarations]: Found implementation of procedure block_div [2021-11-23 02:32:39,457 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-23 02:32:39,457 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-23 02:32:39,457 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-23 02:32:39,457 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-23 02:32:39,458 INFO L130 BoogieDeclarations]: Found specification of procedure oblocks_per_dblock [2021-11-23 02:32:39,458 INFO L138 BoogieDeclarations]: Found implementation of procedure oblocks_per_dblock [2021-11-23 02:32:39,458 INFO L130 BoogieDeclarations]: Found specification of procedure policy_set_dirty [2021-11-23 02:32:39,458 INFO L138 BoogieDeclarations]: Found implementation of procedure policy_set_dirty [2021-11-23 02:32:39,458 INFO L130 BoogieDeclarations]: Found specification of procedure set_cache_size [2021-11-23 02:32:39,458 INFO L138 BoogieDeclarations]: Found implementation of procedure set_cache_size [2021-11-23 02:32:39,458 INFO L130 BoogieDeclarations]: Found specification of procedure cache_message [2021-11-23 02:32:39,459 INFO L138 BoogieDeclarations]: Found implementation of procedure cache_message [2021-11-23 02:32:39,459 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2021-11-23 02:32:39,459 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2021-11-23 02:32:39,459 INFO L130 BoogieDeclarations]: Found specification of procedure inc_ds [2021-11-23 02:32:39,459 INFO L138 BoogieDeclarations]: Found implementation of procedure inc_ds [2021-11-23 02:32:39,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:32:39,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:32:39,459 INFO L130 BoogieDeclarations]: Found specification of procedure inc_hit_counter [2021-11-23 02:32:39,460 INFO L138 BoogieDeclarations]: Found implementation of procedure inc_hit_counter [2021-11-23 02:32:39,460 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-23 02:32:39,460 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-23 02:32:39,460 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_flush_workqueue_11 [2021-11-23 02:32:39,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_flush_workqueue_11 [2021-11-23 02:32:39,460 INFO L130 BoogieDeclarations]: Found specification of procedure dm_cell_visit_release [2021-11-23 02:32:39,460 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_cell_visit_release [2021-11-23 02:32:39,460 INFO L130 BoogieDeclarations]: Found specification of procedure commit [2021-11-23 02:32:39,461 INFO L138 BoogieDeclarations]: Found implementation of procedure commit [2021-11-23 02:32:39,461 INFO L130 BoogieDeclarations]: Found specification of procedure bdev_get_queue [2021-11-23 02:32:39,461 INFO L138 BoogieDeclarations]: Found implementation of procedure bdev_get_queue [2021-11-23 02:32:39,461 INFO L130 BoogieDeclarations]: Found specification of procedure cache_io_hints [2021-11-23 02:32:39,461 INFO L138 BoogieDeclarations]: Found implementation of procedure cache_io_hints [2021-11-23 02:32:39,461 INFO L130 BoogieDeclarations]: Found specification of procedure cache_end_io [2021-11-23 02:32:39,461 INFO L138 BoogieDeclarations]: Found implementation of procedure cache_end_io [2021-11-23 02:32:39,461 INFO L130 BoogieDeclarations]: Found specification of procedure accounted_begin [2021-11-23 02:32:39,462 INFO L138 BoogieDeclarations]: Found implementation of procedure accounted_begin [2021-11-23 02:32:39,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:32:39,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:32:39,462 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 02:32:39,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 02:32:39,462 INFO L130 BoogieDeclarations]: Found specification of procedure dm_cache_metadata_abort [2021-11-23 02:32:39,462 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_cache_metadata_abort [2021-11-23 02:32:39,462 INFO L130 BoogieDeclarations]: Found specification of procedure read_superblock_fields [2021-11-23 02:32:39,462 INFO L138 BoogieDeclarations]: Found implementation of procedure read_superblock_fields [2021-11-23 02:32:39,463 INFO L130 BoogieDeclarations]: Found specification of procedure blk_limits_io_min [2021-11-23 02:32:39,463 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_limits_io_min [2021-11-23 02:32:39,463 INFO L130 BoogieDeclarations]: Found specification of procedure inc_miss_counter [2021-11-23 02:32:39,463 INFO L138 BoogieDeclarations]: Found implementation of procedure inc_miss_counter [2021-11-23 02:32:39,463 INFO L130 BoogieDeclarations]: Found specification of procedure migration_failure [2021-11-23 02:32:39,463 INFO L138 BoogieDeclarations]: Found implementation of procedure migration_failure [2021-11-23 02:32:39,463 INFO L130 BoogieDeclarations]: Found specification of procedure dm_hook_bio [2021-11-23 02:32:39,463 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_hook_bio [2021-11-23 02:32:39,463 INFO L130 BoogieDeclarations]: Found specification of procedure dm_array_set_value [2021-11-23 02:32:39,464 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_array_set_value [2021-11-23 02:32:39,464 INFO L130 BoogieDeclarations]: Found specification of procedure free_io_migration [2021-11-23 02:32:39,464 INFO L138 BoogieDeclarations]: Found implementation of procedure free_io_migration [2021-11-23 02:32:39,464 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2021-11-23 02:32:39,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2021-11-23 02:32:39,464 INFO L130 BoogieDeclarations]: Found specification of procedure do_waker [2021-11-23 02:32:39,464 INFO L138 BoogieDeclarations]: Found implementation of procedure do_waker [2021-11-23 02:32:39,464 INFO L130 BoogieDeclarations]: Found specification of procedure get_dev_size [2021-11-23 02:32:39,464 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dev_size [2021-11-23 02:32:39,465 INFO L130 BoogieDeclarations]: Found specification of procedure is_discarded_oblock [2021-11-23 02:32:39,465 INFO L138 BoogieDeclarations]: Found implementation of procedure is_discarded_oblock [2021-11-23 02:32:39,465 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_bitset [2021-11-23 02:32:39,465 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_bitset [2021-11-23 02:32:39,465 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 02:32:39,465 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 02:32:39,465 INFO L130 BoogieDeclarations]: Found specification of procedure __setup_mapping_info [2021-11-23 02:32:39,465 INFO L138 BoogieDeclarations]: Found implementation of procedure __setup_mapping_info [2021-11-23 02:32:39,466 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 02:32:39,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 02:32:39,466 INFO L130 BoogieDeclarations]: Found specification of procedure queue_delayed_work_on [2021-11-23 02:32:39,466 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_delayed_work_on [2021-11-23 02:32:39,466 INFO L130 BoogieDeclarations]: Found specification of procedure bitset_size_in_bytes [2021-11-23 02:32:39,466 INFO L138 BoogieDeclarations]: Found implementation of procedure bitset_size_in_bytes [2021-11-23 02:32:39,466 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-11-23 02:32:39,466 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-11-23 02:32:39,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 02:32:39,467 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 02:32:39,467 INFO L130 BoogieDeclarations]: Found specification of procedure dm_bm_is_read_only [2021-11-23 02:32:39,467 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_bm_is_read_only [2021-11-23 02:32:39,467 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 02:32:39,467 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 02:32:39,467 INFO L130 BoogieDeclarations]: Found specification of procedure dm_block_location [2021-11-23 02:32:39,467 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_block_location [2021-11-23 02:32:39,468 INFO L130 BoogieDeclarations]: Found specification of procedure dm_read_arg_group [2021-11-23 02:32:39,468 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_read_arg_group [2021-11-23 02:32:39,468 INFO L130 BoogieDeclarations]: Found specification of procedure clear_dirty [2021-11-23 02:32:39,468 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_dirty [2021-11-23 02:32:39,468 INFO L130 BoogieDeclarations]: Found specification of procedure dm_kcopyd_copy [2021-11-23 02:32:39,468 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_kcopyd_copy [2021-11-23 02:32:39,468 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2021-11-23 02:32:39,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2021-11-23 02:32:39,469 INFO L130 BoogieDeclarations]: Found specification of procedure quiesce_migration [2021-11-23 02:32:39,469 INFO L138 BoogieDeclarations]: Found implementation of procedure quiesce_migration [2021-11-23 02:32:39,469 INFO L130 BoogieDeclarations]: Found specification of procedure dm_table_event [2021-11-23 02:32:39,469 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_table_event [2021-11-23 02:32:39,469 INFO L130 BoogieDeclarations]: Found specification of procedure blk_limits_io_opt [2021-11-23 02:32:39,469 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_limits_io_opt [2021-11-23 02:32:39,469 INFO L130 BoogieDeclarations]: Found specification of procedure dm_unregister_target [2021-11-23 02:32:39,470 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_unregister_target [2021-11-23 02:32:39,470 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2021-11-23 02:32:39,470 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2021-11-23 02:32:39,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:32:39,470 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-23 02:32:39,470 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-23 02:32:39,470 INFO L130 BoogieDeclarations]: Found specification of procedure down_read [2021-11-23 02:32:39,470 INFO L138 BoogieDeclarations]: Found implementation of procedure down_read [2021-11-23 02:32:39,471 INFO L130 BoogieDeclarations]: Found specification of procedure free_prison_cell [2021-11-23 02:32:39,471 INFO L138 BoogieDeclarations]: Found implementation of procedure free_prison_cell [2021-11-23 02:32:39,471 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:32:39,471 INFO L130 BoogieDeclarations]: Found specification of procedure __format_metadata [2021-11-23 02:32:39,471 INFO L138 BoogieDeclarations]: Found implementation of procedure __format_metadata [2021-11-23 02:32:39,471 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_work_1 [2021-11-23 02:32:39,471 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_work_1 [2021-11-23 02:32:39,471 INFO L130 BoogieDeclarations]: Found specification of procedure discard_or_flush [2021-11-23 02:32:39,472 INFO L138 BoogieDeclarations]: Found implementation of procedure discard_or_flush [2021-11-23 02:32:39,472 INFO L130 BoogieDeclarations]: Found specification of procedure prealloc_data_structs [2021-11-23 02:32:39,472 INFO L138 BoogieDeclarations]: Found implementation of procedure prealloc_data_structs [2021-11-23 02:32:39,472 INFO L130 BoogieDeclarations]: Found specification of procedure up_write [2021-11-23 02:32:39,472 INFO L138 BoogieDeclarations]: Found implementation of procedure up_write [2021-11-23 02:32:39,472 INFO L130 BoogieDeclarations]: Found specification of procedure unpack_value [2021-11-23 02:32:39,472 INFO L138 BoogieDeclarations]: Found implementation of procedure unpack_value [2021-11-23 02:32:39,472 INFO L130 BoogieDeclarations]: Found specification of procedure dm_sm_destroy [2021-11-23 02:32:39,473 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_sm_destroy [2021-11-23 02:32:39,473 INFO L130 BoogieDeclarations]: Found specification of procedure superblock_read_lock [2021-11-23 02:32:39,473 INFO L138 BoogieDeclarations]: Found implementation of procedure superblock_read_lock [2021-11-23 02:32:39,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:32:39,473 INFO L130 BoogieDeclarations]: Found specification of procedure dm_block_data [2021-11-23 02:32:39,473 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_block_data [2021-11-23 02:32:39,473 INFO L130 BoogieDeclarations]: Found specification of procedure from_dblock [2021-11-23 02:32:39,473 INFO L138 BoogieDeclarations]: Found implementation of procedure from_dblock [2021-11-23 02:32:39,474 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-23 02:32:39,474 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-23 02:32:39,474 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2021-11-23 02:32:39,474 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2021-11-23 02:32:39,474 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-23 02:32:39,474 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-23 02:32:39,474 INFO L130 BoogieDeclarations]: Found specification of procedure cache_bvec_merge [2021-11-23 02:32:39,474 INFO L138 BoogieDeclarations]: Found implementation of procedure cache_bvec_merge [2021-11-23 02:32:39,475 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-23 02:32:39,475 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-23 02:32:39,475 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_init_map [2021-11-23 02:32:39,475 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_init_map [2021-11-23 02:32:39,475 INFO L130 BoogieDeclarations]: Found specification of procedure is_dirty [2021-11-23 02:32:39,475 INFO L138 BoogieDeclarations]: Found implementation of procedure is_dirty [2021-11-23 02:32:39,475 INFO L130 BoogieDeclarations]: Found specification of procedure __open_or_format_metadata [2021-11-23 02:32:39,475 INFO L138 BoogieDeclarations]: Found implementation of procedure __open_or_format_metadata [2021-11-23 02:32:39,476 INFO L130 BoogieDeclarations]: Found specification of procedure bio_list_init [2021-11-23 02:32:39,476 INFO L138 BoogieDeclarations]: Found implementation of procedure bio_list_init [2021-11-23 02:32:39,476 INFO L130 BoogieDeclarations]: Found specification of procedure flush_workqueue [2021-11-23 02:32:39,476 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_workqueue [2021-11-23 02:32:39,476 INFO L130 BoogieDeclarations]: Found specification of procedure dm_array_get_value [2021-11-23 02:32:39,476 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_array_get_value [2021-11-23 02:32:39,476 INFO L130 BoogieDeclarations]: Found specification of procedure dm_array_empty [2021-11-23 02:32:39,476 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_array_empty [2021-11-23 02:32:39,476 INFO L130 BoogieDeclarations]: Found specification of procedure set_dirty [2021-11-23 02:32:39,477 INFO L138 BoogieDeclarations]: Found implementation of procedure set_dirty [2021-11-23 02:32:39,477 INFO L130 BoogieDeclarations]: Found specification of procedure dm_put_device [2021-11-23 02:32:39,477 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_put_device [2021-11-23 02:32:39,477 INFO L130 BoogieDeclarations]: Found specification of procedure dm_array_walk [2021-11-23 02:32:39,477 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_array_walk [2021-11-23 02:32:39,477 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-11-23 02:32:39,477 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-11-23 02:32:39,477 INFO L130 BoogieDeclarations]: Found specification of procedure remap_to_cache [2021-11-23 02:32:39,477 INFO L138 BoogieDeclarations]: Found implementation of procedure remap_to_cache [2021-11-23 02:32:39,477 INFO L130 BoogieDeclarations]: Found specification of procedure oblock_to_dblock [2021-11-23 02:32:39,478 INFO L138 BoogieDeclarations]: Found implementation of procedure oblock_to_dblock [2021-11-23 02:32:39,478 INFO L130 BoogieDeclarations]: Found specification of procedure wake_worker [2021-11-23 02:32:39,478 INFO L138 BoogieDeclarations]: Found implementation of procedure wake_worker [2021-11-23 02:32:39,478 INFO L130 BoogieDeclarations]: Found specification of procedure prealloc_free_structs [2021-11-23 02:32:39,478 INFO L138 BoogieDeclarations]: Found implementation of procedure prealloc_free_structs [2021-11-23 02:32:39,478 INFO L130 BoogieDeclarations]: Found specification of procedure dm_disk_bitset_init [2021-11-23 02:32:39,478 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_disk_bitset_init [2021-11-23 02:32:39,478 INFO L130 BoogieDeclarations]: Found specification of procedure set_discard [2021-11-23 02:32:39,478 INFO L138 BoogieDeclarations]: Found implementation of procedure set_discard [2021-11-23 02:32:39,478 INFO L130 BoogieDeclarations]: Found specification of procedure get_bio_block [2021-11-23 02:32:39,479 INFO L138 BoogieDeclarations]: Found implementation of procedure get_bio_block [2021-11-23 02:32:39,479 INFO L130 BoogieDeclarations]: Found specification of procedure destroy [2021-11-23 02:32:39,479 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy [2021-11-23 02:32:39,479 INFO L130 BoogieDeclarations]: Found specification of procedure dm_bm_read_lock [2021-11-23 02:32:39,479 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_bm_read_lock [2021-11-23 02:32:39,479 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-23 02:32:39,479 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-23 02:32:39,479 INFO L130 BoogieDeclarations]: Found specification of procedure dm_cell_release [2021-11-23 02:32:39,479 INFO L130 BoogieDeclarations]: Found specification of procedure is_quiescing [2021-11-23 02:32:39,479 INFO L138 BoogieDeclarations]: Found implementation of procedure is_quiescing [2021-11-23 02:32:39,480 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 02:32:39,480 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 02:32:39,480 INFO L130 BoogieDeclarations]: Found specification of procedure abort_transaction [2021-11-23 02:32:39,480 INFO L138 BoogieDeclarations]: Found implementation of procedure abort_transaction [2021-11-23 02:32:39,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:32:39,480 INFO L130 BoogieDeclarations]: Found specification of procedure set_cache_mode [2021-11-23 02:32:39,480 INFO L138 BoogieDeclarations]: Found implementation of procedure set_cache_mode [2021-11-23 02:32:39,480 INFO L130 BoogieDeclarations]: Found specification of procedure dm_array_info_init [2021-11-23 02:32:39,480 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_array_info_init [2021-11-23 02:32:39,480 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:32:39,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:32:39,481 INFO L130 BoogieDeclarations]: Found specification of procedure from_oblock [2021-11-23 02:32:39,481 INFO L138 BoogieDeclarations]: Found implementation of procedure from_oblock [2021-11-23 02:32:39,481 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-23 02:32:39,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-23 02:32:39,481 INFO L130 BoogieDeclarations]: Found specification of procedure superblock_lock [2021-11-23 02:32:39,481 INFO L138 BoogieDeclarations]: Found implementation of procedure superblock_lock [2021-11-23 02:32:39,481 INFO L130 BoogieDeclarations]: Found specification of procedure avoid_copy [2021-11-23 02:32:39,481 INFO L138 BoogieDeclarations]: Found implementation of procedure avoid_copy [2021-11-23 02:32:39,481 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2021-11-23 02:32:39,481 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2021-11-23 02:32:39,482 INFO L130 BoogieDeclarations]: Found specification of procedure dm_cache_policy_get_name [2021-11-23 02:32:39,482 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_cache_policy_get_name [2021-11-23 02:32:39,482 INFO L130 BoogieDeclarations]: Found specification of procedure spare_migration_bandwidth [2021-11-23 02:32:39,482 INFO L138 BoogieDeclarations]: Found implementation of procedure spare_migration_bandwidth [2021-11-23 02:32:39,482 INFO L130 BoogieDeclarations]: Found specification of procedure bio_list_add [2021-11-23 02:32:39,482 INFO L138 BoogieDeclarations]: Found implementation of procedure bio_list_add [2021-11-23 02:32:39,482 INFO L130 BoogieDeclarations]: Found specification of procedure remap_cell_to_cache_dirty [2021-11-23 02:32:39,482 INFO L138 BoogieDeclarations]: Found implementation of procedure remap_cell_to_cache_dirty [2021-11-23 02:32:39,482 INFO L130 BoogieDeclarations]: Found specification of procedure prealloc_put_cell [2021-11-23 02:32:39,482 INFO L138 BoogieDeclarations]: Found implementation of procedure prealloc_put_cell [2021-11-23 02:32:39,483 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2021-11-23 02:32:39,483 INFO L138 BoogieDeclarations]: Found implementation of procedure strcasecmp [2021-11-23 02:32:39,483 INFO L130 BoogieDeclarations]: Found specification of procedure defer_bio [2021-11-23 02:32:39,483 INFO L138 BoogieDeclarations]: Found implementation of procedure defer_bio [2021-11-23 02:32:39,483 INFO L130 BoogieDeclarations]: Found specification of procedure metadata_operation_failed [2021-11-23 02:32:39,483 INFO L138 BoogieDeclarations]: Found implementation of procedure metadata_operation_failed [2021-11-23 02:32:39,483 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-23 02:32:39,483 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-23 02:32:39,483 INFO L130 BoogieDeclarations]: Found specification of procedure dm_shift_arg [2021-11-23 02:32:39,483 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_shift_arg [2021-11-23 02:32:39,483 INFO L130 BoogieDeclarations]: Found specification of procedure process_invalidation_requests [2021-11-23 02:32:39,484 INFO L138 BoogieDeclarations]: Found implementation of procedure process_invalidation_requests [2021-11-23 02:32:39,484 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2021-11-23 02:32:39,484 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2021-11-23 02:32:39,484 INFO L130 BoogieDeclarations]: Found specification of procedure bio_list_merge [2021-11-23 02:32:39,484 INFO L138 BoogieDeclarations]: Found implementation of procedure bio_list_merge [2021-11-23 02:32:39,484 INFO L130 BoogieDeclarations]: Found specification of procedure policy_remove_mapping [2021-11-23 02:32:39,484 INFO L138 BoogieDeclarations]: Found implementation of procedure policy_remove_mapping [2021-11-23 02:32:39,484 INFO L130 BoogieDeclarations]: Found specification of procedure to_dblock [2021-11-23 02:32:39,484 INFO L138 BoogieDeclarations]: Found implementation of procedure to_dblock [2021-11-23 02:32:39,485 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_all_1 [2021-11-23 02:32:39,485 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_all_1 [2021-11-23 02:32:39,485 INFO L130 BoogieDeclarations]: Found specification of procedure bio_detain [2021-11-23 02:32:39,485 INFO L138 BoogieDeclarations]: Found implementation of procedure bio_detain [2021-11-23 02:32:39,485 INFO L130 BoogieDeclarations]: Found specification of procedure kstrtoul [2021-11-23 02:32:39,485 INFO L138 BoogieDeclarations]: Found implementation of procedure kstrtoul [2021-11-23 02:32:39,485 INFO L130 BoogieDeclarations]: Found specification of procedure at_least_one_arg [2021-11-23 02:32:39,485 INFO L138 BoogieDeclarations]: Found implementation of procedure at_least_one_arg [2021-11-23 02:32:39,485 INFO L130 BoogieDeclarations]: Found specification of procedure __queue_quiesced_migration [2021-11-23 02:32:39,486 INFO L138 BoogieDeclarations]: Found implementation of procedure __queue_quiesced_migration [2021-11-23 02:32:39,486 INFO L130 BoogieDeclarations]: Found specification of procedure inc_io_migrations [2021-11-23 02:32:39,486 INFO L138 BoogieDeclarations]: Found implementation of procedure inc_io_migrations [2021-11-23 02:32:39,486 INFO L130 BoogieDeclarations]: Found specification of procedure mempool_free_slab [2021-11-23 02:32:39,486 INFO L130 BoogieDeclarations]: Found specification of procedure policy_map [2021-11-23 02:32:39,486 INFO L138 BoogieDeclarations]: Found implementation of procedure policy_map [2021-11-23 02:32:39,486 INFO L130 BoogieDeclarations]: Found specification of procedure dm_bio_prison_free_cell [2021-11-23 02:32:39,486 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_bio_prison_free_cell [2021-11-23 02:32:39,486 INFO L130 BoogieDeclarations]: Found specification of procedure dm_tm_destroy [2021-11-23 02:32:39,487 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_tm_destroy [2021-11-23 02:32:39,487 INFO L130 BoogieDeclarations]: Found specification of procedure complete_migration [2021-11-23 02:32:39,487 INFO L138 BoogieDeclarations]: Found implementation of procedure complete_migration [2021-11-23 02:32:39,487 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-23 02:32:39,487 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-23 02:32:39,487 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-23 02:32:39,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-23 02:32:39,487 INFO L130 BoogieDeclarations]: Found specification of procedure __destroy_persistent_data_objects [2021-11-23 02:32:39,487 INFO L138 BoogieDeclarations]: Found implementation of procedure __destroy_persistent_data_objects [2021-11-23 02:32:39,488 INFO L130 BoogieDeclarations]: Found specification of procedure lookup [2021-11-23 02:32:39,488 INFO L138 BoogieDeclarations]: Found implementation of procedure lookup [2021-11-23 02:32:39,488 INFO L130 BoogieDeclarations]: Found specification of procedure process_invalidation_request [2021-11-23 02:32:39,488 INFO L138 BoogieDeclarations]: Found implementation of procedure process_invalidation_request [2021-11-23 02:32:39,488 INFO L130 BoogieDeclarations]: Found specification of procedure migration_success_pre_commit [2021-11-23 02:32:39,488 INFO L138 BoogieDeclarations]: Found implementation of procedure migration_success_pre_commit [2021-11-23 02:32:39,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:32:39,488 INFO L130 BoogieDeclarations]: Found specification of procedure cache_status [2021-11-23 02:32:39,488 INFO L138 BoogieDeclarations]: Found implementation of procedure cache_status [2021-11-23 02:32:39,489 INFO L130 BoogieDeclarations]: Found specification of procedure dm_bm_unlock [2021-11-23 02:32:39,489 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_bm_unlock [2021-11-23 02:32:39,489 INFO L130 BoogieDeclarations]: Found specification of procedure dm_get_device [2021-11-23 02:32:39,489 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_get_device [2021-11-23 02:32:39,489 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-23 02:32:39,489 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dm_oblock_t~0~TO~VOID [2021-11-23 02:32:39,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dm_oblock_t~0~TO~VOID [2021-11-23 02:32:39,489 INFO L130 BoogieDeclarations]: Found specification of procedure process_cell [2021-11-23 02:32:39,489 INFO L138 BoogieDeclarations]: Found implementation of procedure process_cell [2021-11-23 02:32:40,916 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:32:40,925 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:32:41,886 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 02:32:55,580 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:32:57,456 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:32:57,456 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:32:57,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:32:57 BoogieIcfgContainer [2021-11-23 02:32:57,465 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:32:57,467 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:32:57,467 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:32:57,471 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:32:57,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:32:32" (1/3) ... [2021-11-23 02:32:57,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b110 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:32:57, skipping insertion in model container [2021-11-23 02:32:57,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:38" (2/3) ... [2021-11-23 02:32:57,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b110 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:32:57, skipping insertion in model container [2021-11-23 02:32:57,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:32:57" (3/3) ... [2021-11-23 02:32:57,475 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--md--dm-cache.ko-entry_point.cil.out.i [2021-11-23 02:32:57,481 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:32:57,481 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:32:57,551 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:32:57,559 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=FINITE_AUTOMATA, 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 [2021-11-23 02:32:57,559 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:32:57,656 INFO L276 IsEmpty]: Start isEmpty. Operand has 3296 states, 1927 states have (on average 1.2802283341982357) internal successors, (2467), 2010 states have internal predecessors, (2467), 1124 states have call successors, (1124), 244 states have call predecessors, (1124), 243 states have return successors, (1118), 1089 states have call predecessors, (1118), 1118 states have call successors, (1118) [2021-11-23 02:32:57,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-23 02:32:57,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:57,675 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:32:57,675 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:32:57,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:57,680 INFO L85 PathProgramCache]: Analyzing trace with hash -509605191, now seen corresponding path program 1 times [2021-11-23 02:32:57,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:32:57,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270326949] [2021-11-23 02:32:57,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:57,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:32:58,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:32:58,784 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2021-11-23 02:32:58,797 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:32:58,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270326949] [2021-11-23 02:32:58,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270326949] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:32:58,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:32:58,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:32:58,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016546946] [2021-11-23 02:32:58,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:32:58,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:32:58,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:32:58,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:32:58,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:32:58,849 INFO L87 Difference]: Start difference. First operand has 3296 states, 1927 states have (on average 1.2802283341982357) internal successors, (2467), 2010 states have internal predecessors, (2467), 1124 states have call successors, (1124), 244 states have call predecessors, (1124), 243 states have return successors, (1118), 1089 states have call predecessors, (1118), 1118 states have call successors, (1118) Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-23 02:33:00,945 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:02,877 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:06,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:06,794 INFO L93 Difference]: Finished difference Result 9786 states and 14156 transitions. [2021-11-23 02:33:06,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:33:06,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 196 [2021-11-23 02:33:06,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:06,877 INFO L225 Difference]: With dead ends: 9786 [2021-11-23 02:33:06,877 INFO L226 Difference]: Without dead ends: 6493 [2021-11-23 02:33:06,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:33:06,920 INFO L933 BasicCegarLoop]: 5413 mSDtfsCounter, 4618 mSDsluCounter, 4682 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4618 SdHoareTripleChecker+Valid, 9713 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:33:06,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4618 Valid, 9713 Invalid, 785 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 781 Invalid, 1 Unknown, 0 Unchecked, 7.1s Time] [2021-11-23 02:33:06,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6493 states. [2021-11-23 02:33:07,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6493 to 6490. [2021-11-23 02:33:07,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6490 states, 3798 states have (on average 1.2740916271721958) internal successors, (4839), 3947 states have internal predecessors, (4839), 2209 states have call successors, (2209), 483 states have call predecessors, (2209), 482 states have return successors, (2207), 2149 states have call predecessors, (2207), 2207 states have call successors, (2207) [2021-11-23 02:33:07,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6490 states to 6490 states and 9255 transitions. [2021-11-23 02:33:07,518 INFO L78 Accepts]: Start accepts. Automaton has 6490 states and 9255 transitions. Word has length 196 [2021-11-23 02:33:07,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:07,520 INFO L470 AbstractCegarLoop]: Abstraction has 6490 states and 9255 transitions. [2021-11-23 02:33:07,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-23 02:33:07,521 INFO L276 IsEmpty]: Start isEmpty. Operand 6490 states and 9255 transitions. [2021-11-23 02:33:07,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-23 02:33:07,533 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:07,533 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:33:07,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:33:07,534 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:33:07,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:07,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1569033036, now seen corresponding path program 1 times [2021-11-23 02:33:07,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:33:07,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957417256] [2021-11-23 02:33:07,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:07,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:33:07,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:08,037 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2021-11-23 02:33:08,037 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:33:08,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957417256] [2021-11-23 02:33:08,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957417256] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:33:08,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:33:08,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:33:08,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405287465] [2021-11-23 02:33:08,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:08,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:33:08,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:33:08,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:33:08,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:33:08,050 INFO L87 Difference]: Start difference. First operand 6490 states and 9255 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-23 02:33:10,094 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:15,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:15,848 INFO L93 Difference]: Finished difference Result 19391 states and 27826 transitions. [2021-11-23 02:33:15,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:33:15,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 196 [2021-11-23 02:33:15,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:16,011 INFO L225 Difference]: With dead ends: 19391 [2021-11-23 02:33:16,011 INFO L226 Difference]: Without dead ends: 12930 [2021-11-23 02:33:16,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:33:16,090 INFO L933 BasicCegarLoop]: 5712 mSDtfsCounter, 4618 mSDsluCounter, 4620 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4618 SdHoareTripleChecker+Valid, 9950 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:33:16,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4618 Valid, 9950 Invalid, 814 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 812 Invalid, 1 Unknown, 0 Unchecked, 6.9s Time] [2021-11-23 02:33:16,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12930 states. [2021-11-23 02:33:17,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12930 to 12926. [2021-11-23 02:33:17,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12926 states, 7566 states have (on average 1.2743854084060269) internal successors, (9642), 7863 states have internal predecessors, (9642), 4396 states have call successors, (4396), 964 states have call predecessors, (4396), 963 states have return successors, (4398), 4278 states have call predecessors, (4398), 4394 states have call successors, (4398) [2021-11-23 02:33:17,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12926 states to 12926 states and 18436 transitions. [2021-11-23 02:33:17,186 INFO L78 Accepts]: Start accepts. Automaton has 12926 states and 18436 transitions. Word has length 196 [2021-11-23 02:33:17,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:17,190 INFO L470 AbstractCegarLoop]: Abstraction has 12926 states and 18436 transitions. [2021-11-23 02:33:17,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-23 02:33:17,193 INFO L276 IsEmpty]: Start isEmpty. Operand 12926 states and 18436 transitions. [2021-11-23 02:33:17,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-11-23 02:33:17,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:17,209 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:33:17,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:33:17,211 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:33:17,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:17,212 INFO L85 PathProgramCache]: Analyzing trace with hash -2041594791, now seen corresponding path program 1 times [2021-11-23 02:33:17,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:33:17,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920744381] [2021-11-23 02:33:17,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:17,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:33:17,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:17,579 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2021-11-23 02:33:17,582 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:33:17,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920744381] [2021-11-23 02:33:17,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920744381] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:33:17,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104213297] [2021-11-23 02:33:17,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:17,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:33:17,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:33:17,589 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:33:17,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:33:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:19,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 3904 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:33:19,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:33:19,902 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2021-11-23 02:33:19,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:33:19,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104213297] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:33:19,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:33:19,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-11-23 02:33:19,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871607009] [2021-11-23 02:33:19,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:19,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:33:19,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:33:19,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:33:19,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:33:19,906 INFO L87 Difference]: Start difference. First operand 12926 states and 18436 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-23 02:33:21,947 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:25,745 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:27,664 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:29,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:29,220 INFO L93 Difference]: Finished difference Result 35278 states and 50056 transitions. [2021-11-23 02:33:29,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:33:29,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 261 [2021-11-23 02:33:29,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:29,406 INFO L225 Difference]: With dead ends: 35278 [2021-11-23 02:33:29,406 INFO L226 Difference]: Without dead ends: 22387 [2021-11-23 02:33:29,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:33:29,493 INFO L933 BasicCegarLoop]: 5562 mSDtfsCounter, 3283 mSDsluCounter, 4543 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3283 SdHoareTripleChecker+Valid, 9725 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:33:29,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3283 Valid, 9725 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1024 Invalid, 1 Unknown, 0 Unchecked, 8.2s Time] [2021-11-23 02:33:29,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22387 states. [2021-11-23 02:33:30,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22387 to 22374. [2021-11-23 02:33:30,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22374 states, 13060 states have (on average 1.2614088820826952) internal successors, (16474), 13639 states have internal predecessors, (16474), 7508 states have call successors, (7508), 1806 states have call predecessors, (7508), 1805 states have return successors, (7510), 7276 states have call predecessors, (7510), 7506 states have call successors, (7510) [2021-11-23 02:33:31,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22374 states to 22374 states and 31492 transitions. [2021-11-23 02:33:31,125 INFO L78 Accepts]: Start accepts. Automaton has 22374 states and 31492 transitions. Word has length 261 [2021-11-23 02:33:31,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:31,128 INFO L470 AbstractCegarLoop]: Abstraction has 22374 states and 31492 transitions. [2021-11-23 02:33:31,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-23 02:33:31,128 INFO L276 IsEmpty]: Start isEmpty. Operand 22374 states and 31492 transitions. [2021-11-23 02:33:31,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-11-23 02:33:31,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:31,143 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:33:31,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:33:31,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:33:31,361 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:33:31,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:31,361 INFO L85 PathProgramCache]: Analyzing trace with hash -404100668, now seen corresponding path program 1 times [2021-11-23 02:33:31,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:33:31,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005431643] [2021-11-23 02:33:31,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:31,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:33:31,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:31,945 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2021-11-23 02:33:31,945 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:33:31,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005431643] [2021-11-23 02:33:31,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005431643] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:33:31,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249042301] [2021-11-23 02:33:31,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:31,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:33:31,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:33:31,948 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:33:31,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:33:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:33,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 3540 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:33:33,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:33:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2021-11-23 02:33:34,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:33:34,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249042301] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:33:34,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:33:34,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-23 02:33:34,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744908784] [2021-11-23 02:33:34,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:34,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:33:34,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:33:34,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:33:34,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:33:34,443 INFO L87 Difference]: Start difference. First operand 22374 states and 31492 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 3 states have call successors, (39), 4 states have call predecessors, (39), 2 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-23 02:33:36,482 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:44,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:44,353 INFO L93 Difference]: Finished difference Result 44929 states and 63876 transitions. [2021-11-23 02:33:44,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:33:44,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 3 states have call successors, (39), 4 states have call predecessors, (39), 2 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) Word has length 257 [2021-11-23 02:33:44,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:44,499 INFO L225 Difference]: With dead ends: 44929 [2021-11-23 02:33:44,499 INFO L226 Difference]: Without dead ends: 22590 [2021-11-23 02:33:44,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:33:44,626 INFO L933 BasicCegarLoop]: 4284 mSDtfsCounter, 20 mSDsluCounter, 13978 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 17107 SdHoareTripleChecker+Invalid, 1623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:33:44,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 17107 Invalid, 1623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1606 Invalid, 1 Unknown, 0 Unchecked, 9.0s Time] [2021-11-23 02:33:44,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22590 states. [2021-11-23 02:33:45,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22590 to 22590. [2021-11-23 02:33:45,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22590 states, 13204 states have (on average 1.2591638897303847) internal successors, (16626), 13783 states have internal predecessors, (16626), 7564 states have call successors, (7564), 1822 states have call predecessors, (7564), 1821 states have return successors, (7566), 7332 states have call predecessors, (7566), 7562 states have call successors, (7566) [2021-11-23 02:33:46,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22590 states to 22590 states and 31756 transitions. [2021-11-23 02:33:46,172 INFO L78 Accepts]: Start accepts. Automaton has 22590 states and 31756 transitions. Word has length 257 [2021-11-23 02:33:46,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:46,173 INFO L470 AbstractCegarLoop]: Abstraction has 22590 states and 31756 transitions. [2021-11-23 02:33:46,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 3 states have call successors, (39), 4 states have call predecessors, (39), 2 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-23 02:33:46,173 INFO L276 IsEmpty]: Start isEmpty. Operand 22590 states and 31756 transitions. [2021-11-23 02:33:46,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-11-23 02:33:46,196 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:46,196 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:33:46,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:33:46,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:33:46,421 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:33:46,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:46,422 INFO L85 PathProgramCache]: Analyzing trace with hash 130593630, now seen corresponding path program 1 times [2021-11-23 02:33:46,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:33:46,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487748416] [2021-11-23 02:33:46,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:46,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:33:46,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2021-11-23 02:33:46,754 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:33:46,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487748416] [2021-11-23 02:33:46,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487748416] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:33:46,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:33:46,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:33:46,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016743766] [2021-11-23 02:33:46,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:46,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:33:46,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:33:46,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:33:46,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:33:46,760 INFO L87 Difference]: Start difference. First operand 22590 states and 31756 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-23 02:33:49,012 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:54,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:54,078 INFO L93 Difference]: Finished difference Result 55634 states and 78160 transitions. [2021-11-23 02:33:54,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:33:54,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) Word has length 298 [2021-11-23 02:33:54,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:54,351 INFO L225 Difference]: With dead ends: 55634 [2021-11-23 02:33:54,351 INFO L226 Difference]: Without dead ends: 33079 [2021-11-23 02:33:54,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:33:54,469 INFO L933 BasicCegarLoop]: 6919 mSDtfsCounter, 4240 mSDsluCounter, 3916 mSDsCounter, 0 mSdLazyCounter, 1084 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4240 SdHoareTripleChecker+Valid, 10509 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1084 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:33:54,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4240 Valid, 10509 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1084 Invalid, 1 Unknown, 0 Unchecked, 6.3s Time] [2021-11-23 02:33:54,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33079 states. [2021-11-23 02:33:56,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33079 to 33066. [2021-11-23 02:33:56,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33066 states, 19342 states have (on average 1.2547823389515045) internal successors, (24270), 20211 states have internal predecessors, (24270), 11000 states have call successors, (11000), 2724 states have call predecessors, (11000), 2723 states have return successors, (11002), 10654 states have call predecessors, (11002), 10998 states have call successors, (11002) [2021-11-23 02:33:56,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33066 states to 33066 states and 46272 transitions. [2021-11-23 02:33:56,529 INFO L78 Accepts]: Start accepts. Automaton has 33066 states and 46272 transitions. Word has length 298 [2021-11-23 02:33:56,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:56,530 INFO L470 AbstractCegarLoop]: Abstraction has 33066 states and 46272 transitions. [2021-11-23 02:33:56,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-23 02:33:56,531 INFO L276 IsEmpty]: Start isEmpty. Operand 33066 states and 46272 transitions. [2021-11-23 02:33:56,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-11-23 02:33:56,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:56,552 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:33:56,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:33:56,553 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:33:56,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:56,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1112204103, now seen corresponding path program 1 times [2021-11-23 02:33:56,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:33:56,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195916983] [2021-11-23 02:33:56,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:56,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:33:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:57,369 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-11-23 02:33:57,369 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:33:57,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195916983] [2021-11-23 02:33:57,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195916983] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:33:57,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275976746] [2021-11-23 02:33:57,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:57,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:33:57,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:33:57,372 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:33:57,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:33:59,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:59,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 3781 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:33:59,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:33:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 572 trivial. 0 not checked. [2021-11-23 02:33:59,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:33:59,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275976746] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:33:59,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:33:59,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-23 02:33:59,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989708277] [2021-11-23 02:33:59,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:59,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:33:59,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:33:59,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:33:59,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:33:59,627 INFO L87 Difference]: Start difference. First operand 33066 states and 46272 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 3 states have call successors, (45), 4 states have call predecessors, (45), 2 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-23 02:34:01,667 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:09,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:09,015 INFO L93 Difference]: Finished difference Result 66469 states and 94024 transitions. [2021-11-23 02:34:09,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:34:09,017 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 3 states have call successors, (45), 4 states have call predecessors, (45), 2 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) Word has length 285 [2021-11-23 02:34:09,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:09,239 INFO L225 Difference]: With dead ends: 66469 [2021-11-23 02:34:09,240 INFO L226 Difference]: Without dead ends: 33438 [2021-11-23 02:34:09,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:34:09,731 INFO L933 BasicCegarLoop]: 4297 mSDtfsCounter, 22 mSDsluCounter, 14008 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 17149 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:09,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 17149 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1626 Invalid, 1 Unknown, 0 Unchecked, 8.1s Time] [2021-11-23 02:34:09,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33438 states. [2021-11-23 02:34:11,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33438 to 33426. [2021-11-23 02:34:11,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33426 states, 19582 states have (on average 1.2534981105096517) internal successors, (24546), 20451 states have internal predecessors, (24546), 11096 states have call successors, (11096), 2748 states have call predecessors, (11096), 2747 states have return successors, (11134), 10750 states have call predecessors, (11134), 11094 states have call successors, (11134) [2021-11-23 02:34:11,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33426 states to 33426 states and 46776 transitions. [2021-11-23 02:34:11,518 INFO L78 Accepts]: Start accepts. Automaton has 33426 states and 46776 transitions. Word has length 285 [2021-11-23 02:34:11,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:11,520 INFO L470 AbstractCegarLoop]: Abstraction has 33426 states and 46776 transitions. [2021-11-23 02:34:11,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 3 states have call successors, (45), 4 states have call predecessors, (45), 2 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-23 02:34:11,521 INFO L276 IsEmpty]: Start isEmpty. Operand 33426 states and 46776 transitions. [2021-11-23 02:34:11,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2021-11-23 02:34:11,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:11,558 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 8, 8, 8, 8, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:11,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-23 02:34:11,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 02:34:11,781 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:11,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:11,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1834644521, now seen corresponding path program 1 times [2021-11-23 02:34:11,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:11,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969772950] [2021-11-23 02:34:11,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:11,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:11,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:12,181 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2021-11-23 02:34:12,182 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:12,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969772950] [2021-11-23 02:34:12,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969772950] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:34:12,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42292193] [2021-11-23 02:34:12,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:12,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:34:12,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:34:12,185 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:34:12,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:34:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:14,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 4103 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:34:14,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:34:14,730 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-11-23 02:34:14,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:34:14,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42292193] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:14,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:34:14,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-23 02:34:14,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086419254] [2021-11-23 02:34:14,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:14,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:34:14,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:14,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:34:14,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:34:14,733 INFO L87 Difference]: Start difference. First operand 33426 states and 46776 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-23 02:34:16,761 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:23,449 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:25,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:25,934 INFO L93 Difference]: Finished difference Result 69386 states and 97009 transitions. [2021-11-23 02:34:25,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:34:25,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 319 [2021-11-23 02:34:25,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:26,145 INFO L225 Difference]: With dead ends: 69386 [2021-11-23 02:34:26,145 INFO L226 Difference]: Without dead ends: 35962 [2021-11-23 02:34:26,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:34:26,309 INFO L933 BasicCegarLoop]: 8202 mSDtfsCounter, 4602 mSDsluCounter, 13605 mSDsCounter, 0 mSdLazyCounter, 1874 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4602 SdHoareTripleChecker+Valid, 20685 SdHoareTripleChecker+Invalid, 1879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1874 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:26,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4602 Valid, 20685 Invalid, 1879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1874 Invalid, 1 Unknown, 0 Unchecked, 9.8s Time] [2021-11-23 02:34:26,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35962 states. [2021-11-23 02:34:27,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35962 to 33498. [2021-11-23 02:34:27,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33498 states, 19619 states have (on average 1.2531219735970234) internal successors, (24585), 20493 states have internal predecessors, (24585), 11116 states have call successors, (11116), 2763 states have call predecessors, (11116), 2762 states have return successors, (11154), 10765 states have call predecessors, (11154), 11114 states have call successors, (11154) [2021-11-23 02:34:28,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33498 states to 33498 states and 46855 transitions. [2021-11-23 02:34:28,187 INFO L78 Accepts]: Start accepts. Automaton has 33498 states and 46855 transitions. Word has length 319 [2021-11-23 02:34:28,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:28,188 INFO L470 AbstractCegarLoop]: Abstraction has 33498 states and 46855 transitions. [2021-11-23 02:34:28,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-23 02:34:28,189 INFO L276 IsEmpty]: Start isEmpty. Operand 33498 states and 46855 transitions. [2021-11-23 02:34:28,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-11-23 02:34:28,219 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:28,220 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:28,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:34:28,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:34:28,444 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:28,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:28,445 INFO L85 PathProgramCache]: Analyzing trace with hash -655250205, now seen corresponding path program 1 times [2021-11-23 02:34:28,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:28,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516376967] [2021-11-23 02:34:28,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:28,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:28,803 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2021-11-23 02:34:28,804 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:28,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516376967] [2021-11-23 02:34:28,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516376967] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:34:28,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413751784] [2021-11-23 02:34:28,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:28,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:34:28,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:34:28,806 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:34:28,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:34:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:30,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 4163 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:34:30,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:34:31,315 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2021-11-23 02:34:31,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:34:31,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413751784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:31,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:34:31,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-23 02:34:31,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107279502] [2021-11-23 02:34:31,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:31,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:34:31,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:31,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:34:31,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:34:31,321 INFO L87 Difference]: Start difference. First operand 33498 states and 46855 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 3 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-23 02:34:33,355 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:40,448 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:44,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:44,766 INFO L93 Difference]: Finished difference Result 77255 states and 108021 transitions. [2021-11-23 02:34:44,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:34:44,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 3 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) Word has length 326 [2021-11-23 02:34:44,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:45,147 INFO L225 Difference]: With dead ends: 77255 [2021-11-23 02:34:45,148 INFO L226 Difference]: Without dead ends: 43792 [2021-11-23 02:34:45,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:34:45,261 INFO L933 BasicCegarLoop]: 6888 mSDtfsCounter, 4400 mSDsluCounter, 9065 mSDsCounter, 0 mSdLazyCounter, 3953 mSolverCounterSat, 52 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4427 SdHoareTripleChecker+Valid, 15049 SdHoareTripleChecker+Invalid, 4007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 3953 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:45,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4427 Valid, 15049 Invalid, 4007 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [52 Valid, 3953 Invalid, 2 Unknown, 0 Unchecked, 11.9s Time] [2021-11-23 02:34:45,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43792 states. [2021-11-23 02:34:46,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43792 to 43082. [2021-11-23 02:34:46,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43082 states, 25159 states have (on average 1.2510831114114234) internal successors, (31476), 26317 states have internal predecessors, (31476), 14296 states have call successors, (14296), 3627 states have call predecessors, (14296), 3626 states have return successors, (14346), 13829 states have call predecessors, (14346), 14294 states have call successors, (14346) [2021-11-23 02:34:46,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43082 states to 43082 states and 60118 transitions. [2021-11-23 02:34:47,009 INFO L78 Accepts]: Start accepts. Automaton has 43082 states and 60118 transitions. Word has length 326 [2021-11-23 02:34:47,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:47,010 INFO L470 AbstractCegarLoop]: Abstraction has 43082 states and 60118 transitions. [2021-11-23 02:34:47,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 3 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-23 02:34:47,011 INFO L276 IsEmpty]: Start isEmpty. Operand 43082 states and 60118 transitions. [2021-11-23 02:34:47,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-11-23 02:34:47,061 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:47,062 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 8, 8, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:47,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:34:47,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:34:47,277 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:47,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:47,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1039982028, now seen corresponding path program 1 times [2021-11-23 02:34:47,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:47,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700725511] [2021-11-23 02:34:47,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:47,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:47,710 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:34:47,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [33857315] [2021-11-23 02:34:47,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:47,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:34:47,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:34:47,712 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:34:47,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:34:49,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:49,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 4013 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:34:49,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:34:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2021-11-23 02:34:49,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:34:49,871 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:49,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700725511] [2021-11-23 02:34:49,872 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:34:49,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33857315] [2021-11-23 02:34:49,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33857315] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:49,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:34:49,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:34:49,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840380607] [2021-11-23 02:34:49,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:49,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:34:49,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:49,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:34:49,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:34:49,875 INFO L87 Difference]: Start difference. First operand 43082 states and 60118 transitions. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-23 02:34:51,902 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:56,986 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:35:00,807 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:35:02,743 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:35:05,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:35:05,493 INFO L93 Difference]: Finished difference Result 89753 states and 125742 transitions. [2021-11-23 02:35:05,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:35:05,495 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 327 [2021-11-23 02:35:05,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:35:05,675 INFO L225 Difference]: With dead ends: 89753 [2021-11-23 02:35:05,676 INFO L226 Difference]: Without dead ends: 46706 [2021-11-23 02:35:05,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:35:05,815 INFO L933 BasicCegarLoop]: 4824 mSDtfsCounter, 1580 mSDsluCounter, 19450 mSDsCounter, 0 mSdLazyCounter, 2010 mSolverCounterSat, 401 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1632 SdHoareTripleChecker+Valid, 22718 SdHoareTripleChecker+Invalid, 2412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 2010 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:35:05,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1632 Valid, 22718 Invalid, 2412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 2010 Invalid, 1 Unknown, 0 Unchecked, 13.9s Time] [2021-11-23 02:35:05,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46706 states. [2021-11-23 02:35:07,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46706 to 43098. [2021-11-23 02:35:07,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43098 states, 25175 states have (on average 1.2509235352532273) internal successors, (31492), 26333 states have internal predecessors, (31492), 14296 states have call successors, (14296), 3627 states have call predecessors, (14296), 3626 states have return successors, (14346), 13829 states have call predecessors, (14346), 14294 states have call successors, (14346) [2021-11-23 02:35:07,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43098 states to 43098 states and 60134 transitions. [2021-11-23 02:35:07,681 INFO L78 Accepts]: Start accepts. Automaton has 43098 states and 60134 transitions. Word has length 327 [2021-11-23 02:35:07,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:35:07,682 INFO L470 AbstractCegarLoop]: Abstraction has 43098 states and 60134 transitions. [2021-11-23 02:35:07,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-23 02:35:07,683 INFO L276 IsEmpty]: Start isEmpty. Operand 43098 states and 60134 transitions. [2021-11-23 02:35:07,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2021-11-23 02:35:07,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:35:07,716 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:35:07,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:35:07,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:35:07,930 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:35:07,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:35:07,930 INFO L85 PathProgramCache]: Analyzing trace with hash -2063373605, now seen corresponding path program 1 times [2021-11-23 02:35:07,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:35:07,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956140217] [2021-11-23 02:35:07,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:07,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:35:08,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:08,927 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-11-23 02:35:08,928 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:35:08,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956140217] [2021-11-23 02:35:08,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956140217] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:35:08,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748558123] [2021-11-23 02:35:08,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:08,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:35:08,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:35:08,933 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:35:08,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:35:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:10,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 4470 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-23 02:35:10,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:35:10,907 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 19 treesize of output 13 [2021-11-23 02:35:10,923 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 9 treesize of output 3 [2021-11-23 02:35:10,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 02:35:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-11-23 02:35:11,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:35:11,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-23 02:35:11,864 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-11-23 02:35:11,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748558123] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:35:11,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [800527129] [2021-11-23 02:35:11,892 INFO L159 IcfgInterpreter]: Started Sifa with 182 locations of interest [2021-11-23 02:35:11,893 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:35:11,899 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 02:35:11,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:35:11,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2021-11-23 02:35:11,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848806749] [2021-11-23 02:35:11,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:35:11,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 02:35:11,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:35:11,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 02:35:11,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-11-23 02:35:11,905 INFO L87 Difference]: Start difference. First operand 43098 states and 60134 transitions. Second operand has 15 states, 9 states have (on average 14.11111111111111) internal successors, (127), 11 states have internal predecessors, (127), 9 states have call successors, (49), 6 states have call predecessors, (49), 2 states have return successors, (39), 3 states have call predecessors, (39), 4 states have call successors, (39) [2021-11-23 02:35:13,490 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:35:23,462 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:35:29,701 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:35:33,798 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:35:35,814 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:35:38,393 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:35:40,742 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:35:43,372 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:35:58,126 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:35:59,334 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:36:01,203 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:36:03,226 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:36:05,162 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:36:06,417 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:36:08,435 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:36:10,456 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:36:13,220 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:36:16,142 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:36:17,475 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:36:18,596 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:36:20,375 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:36:23,931 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:36:24,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:36:24,824 INFO L93 Difference]: Finished difference Result 87217 states and 123380 transitions. [2021-11-23 02:36:24,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 02:36:24,826 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 9 states have (on average 14.11111111111111) internal successors, (127), 11 states have internal predecessors, (127), 9 states have call successors, (49), 6 states have call predecessors, (49), 2 states have return successors, (39), 3 states have call predecessors, (39), 4 states have call successors, (39) Word has length 350 [2021-11-23 02:36:24,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:36:25,302 INFO L225 Difference]: With dead ends: 87217 [2021-11-23 02:36:25,303 INFO L226 Difference]: Without dead ends: 44154 [2021-11-23 02:36:25,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 717 GetRequests, 696 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-11-23 02:36:25,543 INFO L933 BasicCegarLoop]: 4295 mSDtfsCounter, 200 mSDsluCounter, 42237 mSDsCounter, 0 mSdLazyCounter, 8076 mSolverCounterSat, 121 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 43643 SdHoareTripleChecker+Invalid, 8204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 8076 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 71.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:36:25,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 43643 Invalid, 8204 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [121 Valid, 8076 Invalid, 7 Unknown, 0 Unchecked, 71.2s Time] [2021-11-23 02:36:25,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44154 states. [2021-11-23 02:36:27,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44154 to 43882. [2021-11-23 02:36:27,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43882 states, 25671 states have (on average 1.2554244088660356) internal successors, (32228), 26909 states have internal predecessors, (32228), 14536 states have call successors, (14536), 3659 states have call predecessors, (14536), 3674 states have return successors, (14714), 14053 states have call predecessors, (14714), 14534 states have call successors, (14714) [2021-11-23 02:36:28,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43882 states to 43882 states and 61478 transitions. [2021-11-23 02:36:28,135 INFO L78 Accepts]: Start accepts. Automaton has 43882 states and 61478 transitions. Word has length 350 [2021-11-23 02:36:28,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:36:28,136 INFO L470 AbstractCegarLoop]: Abstraction has 43882 states and 61478 transitions. [2021-11-23 02:36:28,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 9 states have (on average 14.11111111111111) internal successors, (127), 11 states have internal predecessors, (127), 9 states have call successors, (49), 6 states have call predecessors, (49), 2 states have return successors, (39), 3 states have call predecessors, (39), 4 states have call successors, (39) [2021-11-23 02:36:28,136 INFO L276 IsEmpty]: Start isEmpty. Operand 43882 states and 61478 transitions. [2021-11-23 02:36:28,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2021-11-23 02:36:28,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:36:28,164 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:36:28,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:36:28,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 02:36:28,389 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:36:28,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:36:28,390 INFO L85 PathProgramCache]: Analyzing trace with hash -96259964, now seen corresponding path program 1 times [2021-11-23 02:36:28,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:36:28,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195568090] [2021-11-23 02:36:28,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:28,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:36:28,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:28,753 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2021-11-23 02:36:28,753 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:36:28,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195568090] [2021-11-23 02:36:28,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195568090] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:36:28,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329685346] [2021-11-23 02:36:28,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:28,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:36:28,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:36:28,757 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:36:28,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:36:30,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:30,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 4314 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 02:36:30,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:36:31,172 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2021-11-23 02:36:31,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:36:31,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329685346] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:36:31,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:36:31,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2021-11-23 02:36:31,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017825678] [2021-11-23 02:36:31,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:36:31,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:36:31,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:36:31,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:36:31,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:36:31,175 INFO L87 Difference]: Start difference. First operand 43882 states and 61478 transitions. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 4 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (40), 4 states have call predecessors, (40), 4 states have call successors, (40) [2021-11-23 02:36:33,198 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:36:43,708 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:36:52,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:36:52,683 INFO L93 Difference]: Finished difference Result 98343 states and 137763 transitions. [2021-11-23 02:36:52,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:36:52,685 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 4 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (40), 4 states have call predecessors, (40), 4 states have call successors, (40) Word has length 345 [2021-11-23 02:36:52,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:36:52,951 INFO L225 Difference]: With dead ends: 98343 [2021-11-23 02:36:52,951 INFO L226 Difference]: Without dead ends: 54496 [2021-11-23 02:36:53,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-23 02:36:53,146 INFO L933 BasicCegarLoop]: 6921 mSDtfsCounter, 5299 mSDsluCounter, 14663 mSDsCounter, 0 mSdLazyCounter, 13614 mSolverCounterSat, 277 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5324 SdHoareTripleChecker+Valid, 19437 SdHoareTripleChecker+Invalid, 13892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 13614 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:36:53,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5324 Valid, 19437 Invalid, 13892 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [277 Valid, 13614 Invalid, 1 Unknown, 0 Unchecked, 19.6s Time] [2021-11-23 02:36:53,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54496 states. [2021-11-23 02:36:55,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54496 to 53718. [2021-11-23 02:36:55,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53718 states, 31375 states have (on average 1.2543426294820716) internal successors, (39355), 32917 states have internal predecessors, (39355), 17792 states have call successors, (17792), 4531 states have call predecessors, (17792), 4550 states have return successors, (18014), 17189 states have call predecessors, (18014), 17790 states have call successors, (18014) [2021-11-23 02:36:55,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53718 states to 53718 states and 75161 transitions. [2021-11-23 02:36:55,755 INFO L78 Accepts]: Start accepts. Automaton has 53718 states and 75161 transitions. Word has length 345 [2021-11-23 02:36:55,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:36:55,756 INFO L470 AbstractCegarLoop]: Abstraction has 53718 states and 75161 transitions. [2021-11-23 02:36:55,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 4 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (40), 4 states have call predecessors, (40), 4 states have call successors, (40) [2021-11-23 02:36:55,757 INFO L276 IsEmpty]: Start isEmpty. Operand 53718 states and 75161 transitions. [2021-11-23 02:36:55,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2021-11-23 02:36:55,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:36:55,782 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:36:55,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:36:55,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-23 02:36:55,998 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:36:55,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:36:55,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1263828462, now seen corresponding path program 1 times [2021-11-23 02:36:55,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:36:55,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115509934] [2021-11-23 02:36:55,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:55,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:36:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2021-11-23 02:36:56,287 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:36:56,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115509934] [2021-11-23 02:36:56,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115509934] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:36:56,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226553370] [2021-11-23 02:36:56,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:56,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:36:56,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:36:56,289 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:36:56,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:36:57,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:57,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 4325 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:36:57,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:36:58,338 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2021-11-23 02:36:58,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:36:58,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226553370] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:36:58,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:36:58,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-11-23 02:36:58,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942219408] [2021-11-23 02:36:58,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:36:58,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:36:58,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:36:58,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:36:58,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:36:58,341 INFO L87 Difference]: Start difference. First operand 53718 states and 75161 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (55), 4 states have call predecessors, (55), 2 states have return successors, (48), 3 states have call predecessors, (48), 3 states have call successors, (48) [2021-11-23 02:37:00,363 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:37:04,229 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:37:07,788 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:37:11,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:37:11,372 INFO L93 Difference]: Finished difference Result 108161 states and 153302 transitions. [2021-11-23 02:37:11,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:37:11,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (55), 4 states have call predecessors, (55), 2 states have return successors, (48), 3 states have call predecessors, (48), 3 states have call successors, (48) Word has length 349 [2021-11-23 02:37:11,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:37:11,856 INFO L225 Difference]: With dead ends: 108161 [2021-11-23 02:37:11,856 INFO L226 Difference]: Without dead ends: 54478 [2021-11-23 02:37:12,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:37:12,130 INFO L933 BasicCegarLoop]: 4283 mSDtfsCounter, 22 mSDsluCounter, 13976 mSDsCounter, 0 mSdLazyCounter, 1630 mSolverCounterSat, 19 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 17103 SdHoareTripleChecker+Invalid, 1651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1630 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:37:12,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 17103 Invalid, 1651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1630 Invalid, 2 Unknown, 0 Unchecked, 11.4s Time] [2021-11-23 02:37:12,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54478 states. [2021-11-23 02:37:14,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54478 to 54418. [2021-11-23 02:37:14,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54418 states, 31835 states have (on average 1.2538087011151249) internal successors, (39915), 33377 states have internal predecessors, (39915), 17972 states have call successors, (17972), 4571 states have call predecessors, (17972), 4610 states have return successors, (18314), 17389 states have call predecessors, (18314), 17970 states have call successors, (18314) [2021-11-23 02:37:14,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54418 states to 54418 states and 76201 transitions. [2021-11-23 02:37:14,668 INFO L78 Accepts]: Start accepts. Automaton has 54418 states and 76201 transitions. Word has length 349 [2021-11-23 02:37:14,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:37:14,669 INFO L470 AbstractCegarLoop]: Abstraction has 54418 states and 76201 transitions. [2021-11-23 02:37:14,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (55), 4 states have call predecessors, (55), 2 states have return successors, (48), 3 states have call predecessors, (48), 3 states have call successors, (48) [2021-11-23 02:37:14,669 INFO L276 IsEmpty]: Start isEmpty. Operand 54418 states and 76201 transitions. [2021-11-23 02:37:14,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2021-11-23 02:37:14,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:37:14,685 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:37:14,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-23 02:37:14,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:37:14,901 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:37:14,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:37:14,902 INFO L85 PathProgramCache]: Analyzing trace with hash -308746269, now seen corresponding path program 1 times [2021-11-23 02:37:14,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:37:14,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617113100] [2021-11-23 02:37:14,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:14,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:37:15,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:15,488 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 32 proven. 3 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2021-11-23 02:37:15,488 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:37:15,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617113100] [2021-11-23 02:37:15,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617113100] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:37:15,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441287873] [2021-11-23 02:37:15,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:15,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:37:15,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:37:15,492 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:37:15,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 02:37:16,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:16,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 4328 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:37:16,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:37:17,454 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2021-11-23 02:37:17,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:37:17,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441287873] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:37:17,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:37:17,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 16 [2021-11-23 02:37:17,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154535368] [2021-11-23 02:37:17,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:37:17,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:37:17,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:37:17,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:37:17,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-11-23 02:37:17,456 INFO L87 Difference]: Start difference. First operand 54418 states and 76201 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (55), 4 states have call predecessors, (55), 2 states have return successors, (48), 3 states have call predecessors, (48), 3 states have call successors, (48) [2021-11-23 02:37:19,479 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:37:22,846 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:37:25,289 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:37:28,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:37:28,090 INFO L93 Difference]: Finished difference Result 109161 states and 154702 transitions. [2021-11-23 02:37:28,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:37:28,092 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (55), 4 states have call predecessors, (55), 2 states have return successors, (48), 3 states have call predecessors, (48), 3 states have call successors, (48) Word has length 350 [2021-11-23 02:37:28,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:37:28,576 INFO L225 Difference]: With dead ends: 109161 [2021-11-23 02:37:28,576 INFO L226 Difference]: Without dead ends: 54778 [2021-11-23 02:37:28,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:37:28,799 INFO L933 BasicCegarLoop]: 4272 mSDtfsCounter, 44 mSDsluCounter, 13887 mSDsCounter, 0 mSdLazyCounter, 1619 mSolverCounterSat, 19 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 17010 SdHoareTripleChecker+Invalid, 1640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1619 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:37:28,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 17010 Invalid, 1640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1619 Invalid, 2 Unknown, 0 Unchecked, 8.9s Time] [2021-11-23 02:37:28,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54778 states. [2021-11-23 02:37:30,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54778 to 54738. [2021-11-23 02:37:31,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54738 states, 32095 states have (on average 1.2536220595108272) internal successors, (40235), 33657 states have internal predecessors, (40235), 17992 states have call successors, (17992), 4591 states have call predecessors, (17992), 4650 states have return successors, (18394), 17409 states have call predecessors, (18394), 17990 states have call successors, (18394) [2021-11-23 02:37:31,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54738 states to 54738 states and 76621 transitions. [2021-11-23 02:37:31,574 INFO L78 Accepts]: Start accepts. Automaton has 54738 states and 76621 transitions. Word has length 350 [2021-11-23 02:37:31,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:37:31,575 INFO L470 AbstractCegarLoop]: Abstraction has 54738 states and 76621 transitions. [2021-11-23 02:37:31,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (55), 4 states have call predecessors, (55), 2 states have return successors, (48), 3 states have call predecessors, (48), 3 states have call successors, (48) [2021-11-23 02:37:31,576 INFO L276 IsEmpty]: Start isEmpty. Operand 54738 states and 76621 transitions. [2021-11-23 02:37:31,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2021-11-23 02:37:31,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:37:31,609 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 8, 8, 8, 8, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:37:31,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:37:31,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:37:31,837 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:37:31,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:37:31,838 INFO L85 PathProgramCache]: Analyzing trace with hash -172176454, now seen corresponding path program 1 times [2021-11-23 02:37:31,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:37:31,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917015233] [2021-11-23 02:37:31,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:31,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:37:31,945 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:37:31,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1706674363] [2021-11-23 02:37:31,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:31,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:37:31,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:37:31,946 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:37:31,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 02:37:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:33,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 4264 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:37:33,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:37:33,764 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2021-11-23 02:37:33,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:37:33,765 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:37:33,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917015233] [2021-11-23 02:37:33,765 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:37:33,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706674363] [2021-11-23 02:37:33,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706674363] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:37:33,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:37:33,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:37:33,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361626170] [2021-11-23 02:37:33,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:37:33,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:37:33,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:37:33,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:37:33,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:37:33,768 INFO L87 Difference]: Start difference. First operand 54738 states and 76621 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-23 02:37:35,795 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:37:40,997 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:37:43,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:37:43,815 INFO L93 Difference]: Finished difference Result 116394 states and 163904 transitions. [2021-11-23 02:37:43,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:37:43,816 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 347 [2021-11-23 02:37:43,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:37:44,067 INFO L225 Difference]: With dead ends: 116394 [2021-11-23 02:37:44,067 INFO L226 Difference]: Without dead ends: 61691 [2021-11-23 02:37:44,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:37:44,254 INFO L933 BasicCegarLoop]: 5269 mSDtfsCounter, 1256 mSDsluCounter, 10221 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 247 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1406 SdHoareTripleChecker+Valid, 14700 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:37:44,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1406 Valid, 14700 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1240 Invalid, 1 Unknown, 0 Unchecked, 8.0s Time] [2021-11-23 02:37:44,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61691 states. [2021-11-23 02:37:46,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61691 to 49752. [2021-11-23 02:37:46,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49752 states, 29197 states have (on average 1.2539644484022332) internal successors, (36612), 30605 states have internal predecessors, (36612), 16352 states have call successors, (16352), 4149 states have call predecessors, (16352), 4202 states have return successors, (16714), 15827 states have call predecessors, (16714), 16350 states have call successors, (16714) [2021-11-23 02:37:47,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49752 states to 49752 states and 69678 transitions. [2021-11-23 02:37:47,049 INFO L78 Accepts]: Start accepts. Automaton has 49752 states and 69678 transitions. Word has length 347 [2021-11-23 02:37:47,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:37:47,049 INFO L470 AbstractCegarLoop]: Abstraction has 49752 states and 69678 transitions. [2021-11-23 02:37:47,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-23 02:37:47,050 INFO L276 IsEmpty]: Start isEmpty. Operand 49752 states and 69678 transitions. [2021-11-23 02:37:47,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2021-11-23 02:37:47,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:37:47,068 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 8, 8, 8, 8, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:37:47,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:37:47,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 02:37:47,269 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:37:47,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:37:47,269 INFO L85 PathProgramCache]: Analyzing trace with hash -180539636, now seen corresponding path program 1 times [2021-11-23 02:37:47,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:37:47,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495585851] [2021-11-23 02:37:47,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:47,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:37:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:47,919 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2021-11-23 02:37:47,919 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:37:47,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495585851] [2021-11-23 02:37:47,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495585851] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:37:47,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732800636] [2021-11-23 02:37:47,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:37:47,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:37:47,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:37:47,921 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:37:47,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 02:37:49,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:37:49,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 4738 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-23 02:37:49,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:37:49,996 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 19 treesize of output 13 [2021-11-23 02:37:49,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-23 02:37:50,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 02:37:50,093 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2021-11-23 02:37:50,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:37:50,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-23 02:37:50,902 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2021-11-23 02:37:50,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732800636] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:37:50,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1831161408] [2021-11-23 02:37:50,909 INFO L159 IcfgInterpreter]: Started Sifa with 205 locations of interest [2021-11-23 02:37:50,909 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:37:50,911 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 02:37:50,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:37:50,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2021-11-23 02:37:50,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261208726] [2021-11-23 02:37:50,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:37:50,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 02:37:50,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:37:50,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 02:37:50,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-11-23 02:37:50,923 INFO L87 Difference]: Start difference. First operand 49752 states and 69678 transitions. Second operand has 15 states, 9 states have (on average 15.0) internal successors, (135), 11 states have internal predecessors, (135), 9 states have call successors, (57), 6 states have call predecessors, (57), 2 states have return successors, (45), 3 states have call predecessors, (45), 4 states have call successors, (45) [2021-11-23 02:37:52,949 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:37:59,572 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:03,226 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:05,792 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:07,847 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:10,429 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:16,273 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:18,253 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:31,860 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:32,922 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:35,635 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:38,897 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:39,918 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:41,937 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:44,663 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:46,410 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:47,659 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:38:48,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:38:48,841 INFO L93 Difference]: Finished difference Result 100315 states and 142348 transitions. [2021-11-23 02:38:48,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 02:38:48,843 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 9 states have (on average 15.0) internal successors, (135), 11 states have internal predecessors, (135), 9 states have call successors, (57), 6 states have call predecessors, (57), 2 states have return successors, (45), 3 states have call predecessors, (45), 4 states have call successors, (45) Word has length 375 [2021-11-23 02:38:48,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:38:49,053 INFO L225 Difference]: With dead ends: 100315 [2021-11-23 02:38:49,053 INFO L226 Difference]: Without dead ends: 50598 [2021-11-23 02:38:49,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 765 GetRequests, 746 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-11-23 02:38:49,254 INFO L933 BasicCegarLoop]: 4345 mSDtfsCounter, 171 mSDsluCounter, 33731 mSDsCounter, 0 mSdLazyCounter, 6971 mSolverCounterSat, 119 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 35832 SdHoareTripleChecker+Invalid, 7096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 6971 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:38:49,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 35832 Invalid, 7096 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [119 Valid, 6971 Invalid, 6 Unknown, 0 Unchecked, 56.1s Time] [2021-11-23 02:38:49,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50598 states. [2021-11-23 02:38:51,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50598 to 45194. [2021-11-23 02:38:51,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45194 states, 26551 states have (on average 1.2558472373921885) internal successors, (33344), 27853 states have internal predecessors, (33344), 14888 states have call successors, (14888), 3707 states have call predecessors, (14888), 3754 states have return successors, (15178), 14405 states have call predecessors, (15178), 14886 states have call successors, (15178) [2021-11-23 02:38:51,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45194 states to 45194 states and 63410 transitions. [2021-11-23 02:38:51,455 INFO L78 Accepts]: Start accepts. Automaton has 45194 states and 63410 transitions. Word has length 375 [2021-11-23 02:38:51,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:38:51,456 INFO L470 AbstractCegarLoop]: Abstraction has 45194 states and 63410 transitions. [2021-11-23 02:38:51,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 9 states have (on average 15.0) internal successors, (135), 11 states have internal predecessors, (135), 9 states have call successors, (57), 6 states have call predecessors, (57), 2 states have return successors, (45), 3 states have call predecessors, (45), 4 states have call successors, (45) [2021-11-23 02:38:51,456 INFO L276 IsEmpty]: Start isEmpty. Operand 45194 states and 63410 transitions. [2021-11-23 02:38:51,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2021-11-23 02:38:51,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:38:51,479 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:38:51,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-23 02:38:51,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:38:51,680 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:38:51,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:38:51,681 INFO L85 PathProgramCache]: Analyzing trace with hash -97248473, now seen corresponding path program 1 times [2021-11-23 02:38:51,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:38:51,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789917752] [2021-11-23 02:38:51,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:51,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:38:51,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:51,982 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2021-11-23 02:38:51,983 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:38:51,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789917752] [2021-11-23 02:38:51,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789917752] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:38:51,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359313997] [2021-11-23 02:38:51,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:51,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:38:51,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:38:51,985 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:38:52,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6ef908-9f97-4ab6-b79e-e1166ea01b16/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 02:38:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:53,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 4409 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 02:38:53,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:38:54,473 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2021-11-23 02:38:54,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:38:54,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359313997] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:38:54,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:38:54,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2021-11-23 02:38:54,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179597452] [2021-11-23 02:38:54,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:38:54,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:38:54,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:38:54,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:38:54,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:38:54,475 INFO L87 Difference]: Start difference. First operand 45194 states and 63410 transitions. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 4 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (43), 4 states have call predecessors, (43), 4 states have call successors, (43) [2021-11-23 02:38:56,500 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:39:03,036 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:39:05,066 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:39:09,963 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:39:12,068 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:39:20,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:39:20,835 INFO L93 Difference]: Finished difference Result 104577 states and 147295 transitions. [2021-11-23 02:39:20,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 02:39:20,844 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 4 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (43), 4 states have call predecessors, (43), 4 states have call successors, (43) Word has length 360 [2021-11-23 02:39:20,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:39:21,321 INFO L225 Difference]: With dead ends: 104577 [2021-11-23 02:39:21,322 INFO L226 Difference]: Without dead ends: 59418 [2021-11-23 02:39:21,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-11-23 02:39:21,474 INFO L933 BasicCegarLoop]: 6849 mSDtfsCounter, 5834 mSDsluCounter, 15198 mSDsCounter, 0 mSdLazyCounter, 14166 mSolverCounterSat, 558 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5863 SdHoareTripleChecker+Valid, 19871 SdHoareTripleChecker+Invalid, 14726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 14166 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:39:21,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5863 Valid, 19871 Invalid, 14726 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [558 Valid, 14166 Invalid, 2 Unknown, 0 Unchecked, 24.2s Time] [2021-11-23 02:39:21,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59418 states.