./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--usb--serial--usbserial.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_901fb3d3-50ab-48bc-83d6-8a043a8b7ae1/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901fb3d3-50ab-48bc-83d6-8a043a8b7ae1/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_901fb3d3-50ab-48bc-83d6-8a043a8b7ae1/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901fb3d3-50ab-48bc-83d6-8a043a8b7ae1/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901fb3d3-50ab-48bc-83d6-8a043a8b7ae1/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_901fb3d3-50ab-48bc-83d6-8a043a8b7ae1/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 267df3d840ee451a69f2c9c23fc4c286b307e31eb8c416518f7dce9b4c82858a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:41:09,372 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:41:09,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:41:09,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:41:09,407 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:41:09,408 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:41:09,410 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:41:09,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:41:09,415 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:41:09,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:41:09,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:41:09,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:41:09,419 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:41:09,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:41:09,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:41:09,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:41:09,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:41:09,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:41:09,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:41:09,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:41:09,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:41:09,435 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:41:09,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:41:09,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:41:09,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:41:09,442 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:41:09,443 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:41:09,444 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:41:09,445 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:41:09,446 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:41:09,447 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:41:09,448 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:41:09,449 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:41:09,450 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:41:09,451 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:41:09,452 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:41:09,453 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:41:09,453 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:41:09,454 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:41:09,455 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:41:09,456 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:41:09,457 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901fb3d3-50ab-48bc-83d6-8a043a8b7ae1/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 03:41:09,506 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:41:09,507 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:41:09,507 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:41:09,508 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:41:09,508 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:41:09,509 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:41:09,509 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:41:09,509 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:41:09,509 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:41:09,510 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:41:09,510 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:41:09,510 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:41:09,510 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:41:09,510 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:41:09,511 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:41:09,511 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:41:09,511 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:41:09,511 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:41:09,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:41:09,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:41:09,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:41:09,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:41:09,513 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:41:09,513 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:41:09,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:41:09,514 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:41:09,514 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:41:09,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:41:09,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:41:09,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:41:09,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:41:09,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:41:09,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:41:09,516 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:41:09,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:41:09,516 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:41:09,516 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:41:09,517 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:41:09,517 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_901fb3d3-50ab-48bc-83d6-8a043a8b7ae1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901fb3d3-50ab-48bc-83d6-8a043a8b7ae1/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 267df3d840ee451a69f2c9c23fc4c286b307e31eb8c416518f7dce9b4c82858a [2021-11-23 03:41:09,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:41:09,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:41:09,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:41:09,819 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:41:09,820 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:41:09,822 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901fb3d3-50ab-48bc-83d6-8a043a8b7ae1/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i [2021-11-23 03:41:09,913 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901fb3d3-50ab-48bc-83d6-8a043a8b7ae1/bin/utaipan-EQgc7hIp5V/data/aaed60bec/e1600bf26ae34b668efd480745054907/FLAGd26d52015 [2021-11-23 03:41:10,871 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:41:10,872 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901fb3d3-50ab-48bc-83d6-8a043a8b7ae1/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i [2021-11-23 03:41:10,926 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901fb3d3-50ab-48bc-83d6-8a043a8b7ae1/bin/utaipan-EQgc7hIp5V/data/aaed60bec/e1600bf26ae34b668efd480745054907/FLAGd26d52015 [2021-11-23 03:41:11,233 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901fb3d3-50ab-48bc-83d6-8a043a8b7ae1/bin/utaipan-EQgc7hIp5V/data/aaed60bec/e1600bf26ae34b668efd480745054907 [2021-11-23 03:41:11,236 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:41:11,238 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:41:11,240 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:41:11,240 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:41:11,244 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:41:11,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:41:11" (1/1) ... [2021-11-23 03:41:11,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fcb9baf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:11, skipping insertion in model container [2021-11-23 03:41:11,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:41:11" (1/1) ... [2021-11-23 03:41:11,257 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:41:11,458 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:41:14,146 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_901fb3d3-50ab-48bc-83d6-8a043a8b7ae1/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i[313744,313757] [2021-11-23 03:41:14,209 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:41:14,320 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:41:14,848 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_901fb3d3-50ab-48bc-83d6-8a043a8b7ae1/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i[313744,313757] [2021-11-23 03:41:14,887 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:41:15,099 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:41:15,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:15 WrapperNode [2021-11-23 03:41:15,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:41:15,100 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:41:15,100 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:41:15,101 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:41:15,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:15" (1/1) ... [2021-11-23 03:41:15,310 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:15" (1/1) ... [2021-11-23 03:41:15,546 INFO L137 Inliner]: procedures = 388, calls = 3920, calls flagged for inlining = 190, calls inlined = 187, statements flattened = 7932 [2021-11-23 03:41:15,546 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:41:15,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:41:15,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:41:15,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:41:15,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:15" (1/1) ... [2021-11-23 03:41:15,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:15" (1/1) ... [2021-11-23 03:41:15,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:15" (1/1) ... [2021-11-23 03:41:15,602 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:15" (1/1) ... [2021-11-23 03:41:15,845 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:15" (1/1) ... [2021-11-23 03:41:15,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:15" (1/1) ... [2021-11-23 03:41:15,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:15" (1/1) ... [2021-11-23 03:41:15,972 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:41:15,974 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:41:15,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:41:15,975 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:41:15,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:15" (1/1) ... [2021-11-23 03:41:15,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:41:15,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901fb3d3-50ab-48bc-83d6-8a043a8b7ae1/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:41:16,011 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901fb3d3-50ab-48bc-83d6-8a043a8b7ae1/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:41:16,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901fb3d3-50ab-48bc-83d6-8a043a8b7ae1/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:41:16,064 INFO L130 BoogieDeclarations]: Found specification of procedure serial_proc_open [2021-11-23 03:41:16,064 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_proc_open [2021-11-23 03:41:16,064 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_throttle [2021-11-23 03:41:16,065 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_throttle [2021-11-23 03:41:16,065 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_try_module_get [2021-11-23 03:41:16,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_try_module_get [2021-11-23 03:41:16,065 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-11-23 03:41:16,065 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-11-23 03:41:16,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 03:41:16,066 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 03:41:16,067 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_int [2021-11-23 03:41:16,067 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_int [2021-11-23 03:41:16,067 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_dtr_rts [2021-11-23 03:41:16,067 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_dtr_rts [2021-11-23 03:41:16,067 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_remove [2021-11-23 03:41:16,068 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_remove [2021-11-23 03:41:16,068 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2021-11-23 03:41:16,068 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2021-11-23 03:41:16,068 INFO L130 BoogieDeclarations]: Found specification of procedure serial_chars_in_buffer [2021-11-23 03:41:16,068 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_chars_in_buffer [2021-11-23 03:41:16,069 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 03:41:16,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 03:41:16,069 INFO L130 BoogieDeclarations]: Found specification of procedure char_buf_ptr [2021-11-23 03:41:16,071 INFO L138 BoogieDeclarations]: Found implementation of procedure char_buf_ptr [2021-11-23 03:41:16,071 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_driver_5 [2021-11-23 03:41:16,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_driver_5 [2021-11-23 03:41:16,071 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_activate [2021-11-23 03:41:16,071 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_activate [2021-11-23 03:41:16,072 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit_unlock [2021-11-23 03:41:16,072 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit_unlock [2021-11-23 03:41:16,072 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_1 [2021-11-23 03:41:16,072 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_1 [2021-11-23 03:41:16,073 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_get_interface [2021-11-23 03:41:16,073 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_get_interface [2021-11-23 03:41:16,073 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister_drivers [2021-11-23 03:41:16,074 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister_drivers [2021-11-23 03:41:16,074 INFO L130 BoogieDeclarations]: Found specification of procedure usb_store_new_id [2021-11-23 03:41:16,074 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_store_new_id [2021-11-23 03:41:16,075 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2021-11-23 03:41:16,075 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2021-11-23 03:41:16,075 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_port_work [2021-11-23 03:41:16,075 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_port_work [2021-11-23 03:41:16,075 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-23 03:41:16,076 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-23 03:41:16,076 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_port_poison_urbs [2021-11-23 03:41:16,076 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_port_poison_urbs [2021-11-23 03:41:16,076 INFO L130 BoogieDeclarations]: Found specification of procedure serial_hangup [2021-11-23 03:41:16,077 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_hangup [2021-11-23 03:41:16,077 INFO L130 BoogieDeclarations]: Found specification of procedure serial_ioctl [2021-11-23 03:41:16,078 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_ioctl [2021-11-23 03:41:16,079 INFO L130 BoogieDeclarations]: Found specification of procedure serial_write_room [2021-11-23 03:41:16,079 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_write_room [2021-11-23 03:41:16,079 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-23 03:41:16,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-23 03:41:16,080 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-23 03:41:16,080 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-23 03:41:16,080 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unpoison_urb [2021-11-23 03:41:16,080 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unpoison_urb [2021-11-23 03:41:16,080 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_probe [2021-11-23 03:41:16,080 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_probe [2021-11-23 03:41:16,081 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-23 03:41:16,082 INFO L130 BoogieDeclarations]: Found specification of procedure serial_get_icount [2021-11-23 03:41:16,082 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_get_icount [2021-11-23 03:41:16,082 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-23 03:41:16,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-23 03:41:16,082 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-23 03:41:16,082 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-23 03:41:16,083 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_submit_read_urb [2021-11-23 03:41:16,083 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_submit_read_urb [2021-11-23 03:41:16,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:41:16,083 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-11-23 03:41:16,083 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-11-23 03:41:16,084 INFO L130 BoogieDeclarations]: Found specification of procedure put_tty_driver [2021-11-23 03:41:16,084 INFO L138 BoogieDeclarations]: Found implementation of procedure put_tty_driver [2021-11-23 03:41:16,084 INFO L130 BoogieDeclarations]: Found specification of procedure serial_cleanup [2021-11-23 03:41:16,084 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_cleanup [2021-11-23 03:41:16,084 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-23 03:41:16,084 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-23 03:41:16,085 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_carrier_raised [2021-11-23 03:41:16,085 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_carrier_raised [2021-11-23 03:41:16,085 INFO L130 BoogieDeclarations]: Found specification of procedure __kfifo_uint_must_check_helper [2021-11-23 03:41:16,085 INFO L138 BoogieDeclarations]: Found implementation of procedure __kfifo_uint_must_check_helper [2021-11-23 03:41:16,085 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-23 03:41:16,086 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-23 03:41:16,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 03:41:16,087 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_probe [2021-11-23 03:41:16,087 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_probe [2021-11-23 03:41:16,087 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-23 03:41:16,087 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-23 03:41:16,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 03:41:16,087 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_reset_resume [2021-11-23 03:41:16,087 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_reset_resume [2021-11-23 03:41:16,087 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_read_bulk_callback [2021-11-23 03:41:16,087 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_read_bulk_callback [2021-11-23 03:41:16,088 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface [2021-11-23 03:41:16,088 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface [2021-11-23 03:41:16,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:41:16,088 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-23 03:41:16,088 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-23 03:41:16,088 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_shutdown [2021-11-23 03:41:16,088 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_shutdown [2021-11-23 03:41:16,088 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2021-11-23 03:41:16,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2021-11-23 03:41:16,089 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-11-23 03:41:16,089 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-11-23 03:41:16,089 INFO L130 BoogieDeclarations]: Found specification of procedure __read_once_size [2021-11-23 03:41:16,089 INFO L138 BoogieDeclarations]: Found implementation of procedure __read_once_size [2021-11-23 03:41:16,089 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-23 03:41:16,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-23 03:41:16,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:41:16,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:41:16,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:41:16,093 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-23 03:41:16,094 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 03:41:16,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 03:41:16,094 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-23 03:41:16,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-23 03:41:16,097 INFO L130 BoogieDeclarations]: Found specification of procedure usb_register_driver [2021-11-23 03:41:16,097 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_register_driver [2021-11-23 03:41:16,097 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-23 03:41:16,097 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-23 03:41:16,102 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_put [2021-11-23 03:41:16,102 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_put [2021-11-23 03:41:16,102 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-23 03:41:16,102 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-23 03:41:16,103 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_serial [2021-11-23 03:41:16,103 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_serial [2021-11-23 03:41:16,103 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-23 03:41:16,103 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-23 03:41:16,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:41:16,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:41:16,104 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_out [2021-11-23 03:41:16,104 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_out [2021-11-23 03:41:16,104 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-23 03:41:16,104 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-23 03:41:16,104 INFO L130 BoogieDeclarations]: Found specification of procedure serial_break [2021-11-23 03:41:16,104 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_break [2021-11-23 03:41:16,105 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write_start [2021-11-23 03:41:16,105 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write_start [2021-11-23 03:41:16,105 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-11-23 03:41:16,105 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-11-23 03:41:16,105 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2021-11-23 03:41:16,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2021-11-23 03:41:16,106 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2021-11-23 03:41:16,106 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2021-11-23 03:41:16,106 INFO L130 BoogieDeclarations]: Found specification of procedure usb_translate_errors [2021-11-23 03:41:16,106 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_translate_errors [2021-11-23 03:41:16,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 03:41:16,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 03:41:16,107 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 03:41:16,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 03:41:16,107 INFO L130 BoogieDeclarations]: Found specification of procedure new_id_show [2021-11-23 03:41:16,107 INFO L138 BoogieDeclarations]: Found implementation of procedure new_id_show [2021-11-23 03:41:16,107 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write [2021-11-23 03:41:16,107 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write [2021-11-23 03:41:16,108 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_maxp [2021-11-23 03:41:16,108 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_maxp [2021-11-23 03:41:16,108 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2021-11-23 03:41:16,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2021-11-23 03:41:16,108 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 03:41:16,108 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 03:41:16,109 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-11-23 03:41:16,109 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-11-23 03:41:16,110 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 03:41:16,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 03:41:16,110 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_release_4 [2021-11-23 03:41:16,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_release_4 [2021-11-23 03:41:16,111 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_suspend [2021-11-23 03:41:16,111 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_suspend [2021-11-23 03:41:16,111 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_msr_changed [2021-11-23 03:41:16,111 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_msr_changed [2021-11-23 03:41:16,111 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_is_int_in [2021-11-23 03:41:16,112 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_is_int_in [2021-11-23 03:41:16,112 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 03:41:16,112 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 03:41:16,112 INFO L130 BoogieDeclarations]: Found specification of procedure new_id_store [2021-11-23 03:41:16,112 INFO L138 BoogieDeclarations]: Found implementation of procedure new_id_store [2021-11-23 03:41:16,112 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_debug_data [2021-11-23 03:41:16,112 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_debug_data [2021-11-23 03:41:16,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:41:16,113 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-23 03:41:16,113 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-23 03:41:16,113 INFO L130 BoogieDeclarations]: Found specification of procedure serial_unthrottle [2021-11-23 03:41:16,113 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_unthrottle [2021-11-23 03:41:16,113 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_submit_read_urbs [2021-11-23 03:41:16,114 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_submit_read_urbs [2021-11-23 03:41:16,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:41:16,114 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-23 03:41:16,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-23 03:41:16,114 INFO L130 BoogieDeclarations]: Found specification of procedure serial_throttle [2021-11-23 03:41:16,114 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_throttle [2021-11-23 03:41:16,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 03:41:16,115 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-23 03:41:16,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-23 03:41:16,115 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister [2021-11-23 03:41:16,115 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister [2021-11-23 03:41:16,115 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-23 03:41:16,116 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-23 03:41:16,116 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_resume [2021-11-23 03:41:16,116 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_resume [2021-11-23 03:41:16,116 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2021-11-23 03:41:16,116 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2021-11-23 03:41:16,116 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-23 03:41:16,117 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-23 03:41:16,117 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-23 03:41:16,117 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-23 03:41:16,117 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_port_softint [2021-11-23 03:41:16,117 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_port_softint [2021-11-23 03:41:16,117 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmget [2021-11-23 03:41:16,118 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmget [2021-11-23 03:41:16,118 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-11-23 03:41:16,118 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-11-23 03:41:16,118 INFO L130 BoogieDeclarations]: Found specification of procedure jiffies_to_msecs [2021-11-23 03:41:16,118 INFO L138 BoogieDeclarations]: Found implementation of procedure jiffies_to_msecs [2021-11-23 03:41:16,118 INFO L130 BoogieDeclarations]: Found specification of procedure bus_unregister [2021-11-23 03:41:16,118 INFO L138 BoogieDeclarations]: Found implementation of procedure bus_unregister [2021-11-23 03:41:16,119 INFO L130 BoogieDeclarations]: Found specification of procedure usb_poison_urb [2021-11-23 03:41:16,119 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_poison_urb [2021-11-23 03:41:16,119 INFO L130 BoogieDeclarations]: Found specification of procedure usb_deregister [2021-11-23 03:41:16,119 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_deregister [2021-11-23 03:41:16,119 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2021-11-23 03:41:16,120 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2021-11-23 03:41:16,120 INFO L130 BoogieDeclarations]: Found specification of procedure serial_wait_until_sent [2021-11-23 03:41:16,120 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_wait_until_sent [2021-11-23 03:41:16,120 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-23 03:41:16,120 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-23 03:41:16,121 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_match [2021-11-23 03:41:16,121 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_match [2021-11-23 03:41:16,121 INFO L130 BoogieDeclarations]: Found specification of procedure serial_open [2021-11-23 03:41:16,121 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_open [2021-11-23 03:41:16,121 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-23 03:41:16,121 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-23 03:41:16,122 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_int_urb [2021-11-23 03:41:16,122 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_int_urb [2021-11-23 03:41:16,122 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 03:41:16,122 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 03:41:16,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:41:16,122 INFO L130 BoogieDeclarations]: Found specification of procedure serial_set_termios [2021-11-23 03:41:16,123 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_set_termios [2021-11-23 03:41:16,127 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_resume [2021-11-23 03:41:16,127 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_resume [2021-11-23 03:41:16,128 INFO L130 BoogieDeclarations]: Found specification of procedure single_release [2021-11-23 03:41:16,128 INFO L138 BoogieDeclarations]: Found implementation of procedure single_release [2021-11-23 03:41:16,128 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 03:41:16,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 03:41:16,128 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_disconnect [2021-11-23 03:41:16,128 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_disconnect [2021-11-23 03:41:16,128 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_unthrottle [2021-11-23 03:41:16,129 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_unthrottle [2021-11-23 03:41:16,132 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_port_get_by_minor [2021-11-23 03:41:16,133 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_port_get_by_minor [2021-11-23 03:41:16,133 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-23 03:41:16,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-23 03:41:16,133 INFO L130 BoogieDeclarations]: Found specification of procedure serial_install [2021-11-23 03:41:16,133 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_install [2021-11-23 03:41:16,133 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_handle_sysrq_char [2021-11-23 03:41:16,134 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_handle_sysrq_char [2021-11-23 03:41:16,134 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmset [2021-11-23 03:41:16,134 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmset [2021-11-23 03:41:16,134 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-23 03:41:16,134 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-23 03:41:16,134 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_unpoison_port_urbs [2021-11-23 03:41:16,134 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_unpoison_port_urbs [2021-11-23 03:41:16,135 INFO L130 BoogieDeclarations]: Found specification of procedure serial_write [2021-11-23 03:41:16,135 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_write [2021-11-23 03:41:16,135 INFO L130 BoogieDeclarations]: Found specification of procedure idr_remove [2021-11-23 03:41:16,135 INFO L138 BoogieDeclarations]: Found implementation of procedure idr_remove [2021-11-23 03:41:16,135 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-23 03:41:16,135 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-23 03:41:16,135 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-23 03:41:16,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-23 03:41:16,136 INFO L130 BoogieDeclarations]: Found specification of procedure get_iface_id [2021-11-23 03:41:16,136 INFO L138 BoogieDeclarations]: Found implementation of procedure get_iface_id [2021-11-23 03:41:16,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:41:16,136 INFO L130 BoogieDeclarations]: Found specification of procedure tty_unregister_driver [2021-11-23 03:41:16,136 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_unregister_driver [2021-11-23 03:41:17,335 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:41:17,342 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:41:17,940 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 03:41:30,401 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:41:32,200 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:41:32,200 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 03:41:32,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:41:32 BoogieIcfgContainer [2021-11-23 03:41:32,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:41:32,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:41:32,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:41:32,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:41:32,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:41:11" (1/3) ... [2021-11-23 03:41:32,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@254187e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:41:32, skipping insertion in model container [2021-11-23 03:41:32,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:15" (2/3) ... [2021-11-23 03:41:32,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@254187e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:41:32, skipping insertion in model container [2021-11-23 03:41:32,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:41:32" (3/3) ... [2021-11-23 03:41:32,217 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i [2021-11-23 03:41:32,226 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:41:32,226 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:41:32,297 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:41:32,316 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 03:41:32,317 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:41:32,394 INFO L276 IsEmpty]: Start isEmpty. Operand has 1801 states, 1151 states have (on average 1.3588184187662902) internal successors, (1564), 1187 states have internal predecessors, (1564), 520 states have call successors, (520), 129 states have call predecessors, (520), 128 states have return successors, (509), 496 states have call predecessors, (509), 509 states have call successors, (509) [2021-11-23 03:41:32,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-23 03:41:32,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:41:32,443 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:41:32,444 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:41:32,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:41:32,449 INFO L85 PathProgramCache]: Analyzing trace with hash -779559723, now seen corresponding path program 1 times [2021-11-23 03:41:32,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:41:32,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853629726] [2021-11-23 03:41:32,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:41:32,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:41:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:41:33,859 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2021-11-23 03:41:33,863 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:41:33,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853629726] [2021-11-23 03:41:33,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853629726] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:41:33,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:41:33,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:41:33,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972046458] [2021-11-23 03:41:33,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:41:33,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:41:33,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:41:33,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:41:33,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:41:33,915 INFO L87 Difference]: Start difference. First operand has 1801 states, 1151 states have (on average 1.3588184187662902) internal successors, (1564), 1187 states have internal predecessors, (1564), 520 states have call successors, (520), 129 states have call predecessors, (520), 128 states have return successors, (509), 496 states have call predecessors, (509), 509 states have call successors, (509) Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-23 03:41:36,060 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:41:38,485 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:41:39,815 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:41:41,271 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 03:41:45,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:41:45,377 INFO L93 Difference]: Finished difference Result 4939 states and 7205 transitions. [2021-11-23 03:41:45,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:41:45,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 228 [2021-11-23 03:41:45,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:41:45,429 INFO L225 Difference]: With dead ends: 4939 [2021-11-23 03:41:45,429 INFO L226 Difference]: Without dead ends: 3144 [2021-11-23 03:41:45,446 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 03:41:45,450 INFO L933 BasicCegarLoop]: 2679 mSDtfsCounter, 1975 mSDsluCounter, 2526 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1975 SdHoareTripleChecker+Valid, 4899 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:41:45,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1975 Valid, 4899 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 627 Invalid, 2 Unknown, 0 Unchecked, 11.1s Time] [2021-11-23 03:41:45,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3144 states. [2021-11-23 03:41:45,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3144 to 3138. [2021-11-23 03:41:45,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3138 states, 2024 states have (on average 1.3537549407114624) internal successors, (2740), 2067 states have internal predecessors, (2740), 877 states have call successors, (877), 237 states have call predecessors, (877), 236 states have return successors, (887), 849 states have call predecessors, (887), 875 states have call successors, (887) [2021-11-23 03:41:45,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3138 states to 3138 states and 4504 transitions. [2021-11-23 03:41:45,820 INFO L78 Accepts]: Start accepts. Automaton has 3138 states and 4504 transitions. Word has length 228 [2021-11-23 03:41:45,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:41:45,824 INFO L470 AbstractCegarLoop]: Abstraction has 3138 states and 4504 transitions. [2021-11-23 03:41:45,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-23 03:41:45,826 INFO L276 IsEmpty]: Start isEmpty. Operand 3138 states and 4504 transitions. [2021-11-23 03:41:45,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-23 03:41:45,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:41:45,851 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:41:45,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:41:45,852 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:41:45,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:41:45,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1202057471, now seen corresponding path program 1 times [2021-11-23 03:41:45,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:41:45,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413602778] [2021-11-23 03:41:45,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:41:45,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:41:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:41:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2021-11-23 03:41:46,544 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:41:46,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413602778] [2021-11-23 03:41:46,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413602778] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:41:46,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:41:46,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:41:46,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027213635] [2021-11-23 03:41:46,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:41:46,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:41:46,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:41:46,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:41:46,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:41:46,549 INFO L87 Difference]: Start difference. First operand 3138 states and 4504 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-23 03:41:48,647 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:41:50,958 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:41:52,009 WARN L534 Checker$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 03:41:56,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:41:56,692 INFO L93 Difference]: Finished difference Result 6359 states and 9161 transitions. [2021-11-23 03:41:56,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:41:56,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 238 [2021-11-23 03:41:56,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:41:56,738 INFO L225 Difference]: With dead ends: 6359 [2021-11-23 03:41:56,738 INFO L226 Difference]: Without dead ends: 4609 [2021-11-23 03:41:56,751 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 03:41:56,755 INFO L933 BasicCegarLoop]: 2725 mSDtfsCounter, 2104 mSDsluCounter, 2503 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2104 SdHoareTripleChecker+Valid, 4922 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:41:56,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2104 Valid, 4922 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 631 Invalid, 2 Unknown, 0 Unchecked, 9.9s Time] [2021-11-23 03:41:56,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4609 states. [2021-11-23 03:41:56,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4609 to 4602. [2021-11-23 03:41:56,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4602 states, 2973 states have (on average 1.355196770938446) internal successors, (4029), 3038 states have internal predecessors, (4029), 1276 states have call successors, (1276), 353 states have call predecessors, (1276), 352 states have return successors, (1298), 1235 states have call predecessors, (1298), 1274 states have call successors, (1298) [2021-11-23 03:41:57,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4602 states to 4602 states and 6603 transitions. [2021-11-23 03:41:57,015 INFO L78 Accepts]: Start accepts. Automaton has 4602 states and 6603 transitions. Word has length 238 [2021-11-23 03:41:57,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:41:57,018 INFO L470 AbstractCegarLoop]: Abstraction has 4602 states and 6603 transitions. [2021-11-23 03:41:57,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-23 03:41:57,020 INFO L276 IsEmpty]: Start isEmpty. Operand 4602 states and 6603 transitions. [2021-11-23 03:41:57,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-11-23 03:41:57,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:41:57,042 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:41:57,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:41:57,042 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:41:57,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:41:57,043 INFO L85 PathProgramCache]: Analyzing trace with hash -165429054, now seen corresponding path program 1 times [2021-11-23 03:41:57,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:41:57,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024018808] [2021-11-23 03:41:57,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:41:57,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:41:57,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:41:57,531 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2021-11-23 03:41:57,531 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:41:57,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024018808] [2021-11-23 03:41:57,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024018808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:41:57,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:41:57,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:41:57,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651796078] [2021-11-23 03:41:57,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:41:57,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:41:57,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:41:57,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:41:57,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:41:57,535 INFO L87 Difference]: Start difference. First operand 4602 states and 6603 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-23 03:41:59,636 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:42:01,978 WARN L534 Checker$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 03:42:07,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:42:07,372 INFO L93 Difference]: Finished difference Result 12051 states and 17355 transitions. [2021-11-23 03:42:07,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:42:07,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 248 [2021-11-23 03:42:07,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:42:07,442 INFO L225 Difference]: With dead ends: 12051 [2021-11-23 03:42:07,442 INFO L226 Difference]: Without dead ends: 7496 [2021-11-23 03:42:07,472 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 03:42:07,475 INFO L933 BasicCegarLoop]: 2802 mSDtfsCounter, 2329 mSDsluCounter, 2522 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2329 SdHoareTripleChecker+Valid, 5023 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:42:07,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2329 Valid, 5023 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 653 Invalid, 2 Unknown, 0 Unchecked, 9.4s Time] [2021-11-23 03:42:07,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7496 states. [2021-11-23 03:42:07,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7496 to 7480. [2021-11-23 03:42:07,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7480 states, 4821 states have (on average 1.354490769549886) internal successors, (6530), 4931 states have internal predecessors, (6530), 2074 states have call successors, (2074), 587 states have call predecessors, (2074), 584 states have return successors, (2200), 2002 states have call predecessors, (2200), 2072 states have call successors, (2200) [2021-11-23 03:42:07,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7480 states to 7480 states and 10804 transitions. [2021-11-23 03:42:07,899 INFO L78 Accepts]: Start accepts. Automaton has 7480 states and 10804 transitions. Word has length 248 [2021-11-23 03:42:07,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:42:07,900 INFO L470 AbstractCegarLoop]: Abstraction has 7480 states and 10804 transitions. [2021-11-23 03:42:07,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-23 03:42:07,901 INFO L276 IsEmpty]: Start isEmpty. Operand 7480 states and 10804 transitions. [2021-11-23 03:42:07,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-23 03:42:07,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:42:07,917 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:42:07,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:42:07,918 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:42:07,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:42:07,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1250201056, now seen corresponding path program 1 times [2021-11-23 03:42:07,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:42:07,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29784190] [2021-11-23 03:42:07,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:42:07,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:42:08,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:42:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2021-11-23 03:42:08,336 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:42:08,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29784190] [2021-11-23 03:42:08,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29784190] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:42:08,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:42:08,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:42:08,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010870056] [2021-11-23 03:42:08,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:42:08,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:42:08,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:42:08,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:42:08,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:42:08,339 INFO L87 Difference]: Start difference. First operand 7480 states and 10804 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-23 03:42:10,435 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:42:12,776 WARN L534 Checker$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 03:42:15,890 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:42:18,302 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:42:20,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:42:20,601 INFO L93 Difference]: Finished difference Result 21097 states and 30336 transitions. [2021-11-23 03:42:20,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:42:20,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 252 [2021-11-23 03:42:20,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:42:20,714 INFO L225 Difference]: With dead ends: 21097 [2021-11-23 03:42:20,714 INFO L226 Difference]: Without dead ends: 13677 [2021-11-23 03:42:20,758 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 03:42:20,759 INFO L933 BasicCegarLoop]: 2767 mSDtfsCounter, 2032 mSDsluCounter, 2466 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2032 SdHoareTripleChecker+Valid, 4928 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:42:20,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2032 Valid, 4928 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 737 Invalid, 3 Unknown, 0 Unchecked, 11.8s Time] [2021-11-23 03:42:20,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13677 states. [2021-11-23 03:42:21,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13677 to 13661. [2021-11-23 03:42:21,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13661 states, 8764 states have (on average 1.3482428115015974) internal successors, (11816), 8980 states have internal predecessors, (11816), 3779 states have call successors, (3779), 1122 states have call predecessors, (3779), 1117 states have return successors, (3999), 3634 states have call predecessors, (3999), 3777 states have call successors, (3999) [2021-11-23 03:42:21,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13661 states to 13661 states and 19594 transitions. [2021-11-23 03:42:21,410 INFO L78 Accepts]: Start accepts. Automaton has 13661 states and 19594 transitions. Word has length 252 [2021-11-23 03:42:21,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:42:21,411 INFO L470 AbstractCegarLoop]: Abstraction has 13661 states and 19594 transitions. [2021-11-23 03:42:21,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-23 03:42:21,411 INFO L276 IsEmpty]: Start isEmpty. Operand 13661 states and 19594 transitions. [2021-11-23 03:42:21,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-23 03:42:21,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:42:21,426 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 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] [2021-11-23 03:42:21,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:42:21,429 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:42:21,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:42:21,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1068586725, now seen corresponding path program 1 times [2021-11-23 03:42:21,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:42:21,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577798315] [2021-11-23 03:42:21,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:42:21,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:42:21,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:42:21,837 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked. [2021-11-23 03:42:21,837 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:42:21,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577798315] [2021-11-23 03:42:21,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577798315] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:42:21,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:42:21,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:42:21,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028667339] [2021-11-23 03:42:21,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:42:21,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:42:21,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:42:21,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:42:21,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:42:21,841 INFO L87 Difference]: Start difference. First operand 13661 states and 19594 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-23 03:42:23,938 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:42:26,048 WARN L534 Checker$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 03:42:28,145 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:42:30,777 WARN L534 Checker$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 03:42:34,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:42:34,344 INFO L93 Difference]: Finished difference Result 38772 states and 56113 transitions. [2021-11-23 03:42:34,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:42:34,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 255 [2021-11-23 03:42:34,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:42:34,529 INFO L225 Difference]: With dead ends: 38772 [2021-11-23 03:42:34,529 INFO L226 Difference]: Without dead ends: 25171 [2021-11-23 03:42:34,606 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 03:42:34,607 INFO L933 BasicCegarLoop]: 3639 mSDtfsCounter, 2176 mSDsluCounter, 2564 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2176 SdHoareTripleChecker+Valid, 5899 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:42:34,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2176 Valid, 5899 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 813 Invalid, 3 Unknown, 0 Unchecked, 11.8s Time] [2021-11-23 03:42:34,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25171 states. [2021-11-23 03:42:35,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25171 to 25098. [2021-11-23 03:42:35,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25098 states, 16101 states have (on average 1.3458791379417427) internal successors, (21670), 16488 states have internal predecessors, (21670), 6894 states have call successors, (6894), 2106 states have call predecessors, (6894), 2102 states have return successors, (7955), 6634 states have call predecessors, (7955), 6892 states have call successors, (7955) [2021-11-23 03:42:36,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25098 states to 25098 states and 36519 transitions. [2021-11-23 03:42:36,018 INFO L78 Accepts]: Start accepts. Automaton has 25098 states and 36519 transitions. Word has length 255 [2021-11-23 03:42:36,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:42:36,019 INFO L470 AbstractCegarLoop]: Abstraction has 25098 states and 36519 transitions. [2021-11-23 03:42:36,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-23 03:42:36,020 INFO L276 IsEmpty]: Start isEmpty. Operand 25098 states and 36519 transitions. [2021-11-23 03:42:36,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-11-23 03:42:36,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:42:36,097 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 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] [2021-11-23 03:42:36,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:42:36,097 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:42:36,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:42:36,098 INFO L85 PathProgramCache]: Analyzing trace with hash 162103670, now seen corresponding path program 1 times [2021-11-23 03:42:36,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:42:36,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591715760] [2021-11-23 03:42:36,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:42:36,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:42:36,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:42:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2021-11-23 03:42:36,497 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:42:36,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591715760] [2021-11-23 03:42:36,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591715760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:42:36,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:42:36,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:42:36,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813469444] [2021-11-23 03:42:36,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:42:36,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:42:36,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:42:36,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:42:36,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:42:36,500 INFO L87 Difference]: Start difference. First operand 25098 states and 36519 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-23 03:42:38,596 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:42:40,699 WARN L534 Checker$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 03:42:43,840 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:42:46,656 WARN L534 Checker$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 03:42:50,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:42:50,292 INFO L93 Difference]: Finished difference Result 58245 states and 84295 transitions. [2021-11-23 03:42:50,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:42:50,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 297 [2021-11-23 03:42:50,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:42:50,515 INFO L225 Difference]: With dead ends: 58245 [2021-11-23 03:42:50,515 INFO L226 Difference]: Without dead ends: 33207 [2021-11-23 03:42:50,628 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 03:42:50,630 INFO L933 BasicCegarLoop]: 3791 mSDtfsCounter, 2149 mSDsluCounter, 2172 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2151 SdHoareTripleChecker+Valid, 5684 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:42:50,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2151 Valid, 5684 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 815 Invalid, 4 Unknown, 0 Unchecked, 12.6s Time] [2021-11-23 03:42:50,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33207 states. [2021-11-23 03:42:52,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33207 to 33104. [2021-11-23 03:42:52,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33104 states, 21041 states have (on average 1.3347274369088922) internal successors, (28084), 21584 states have internal predecessors, (28084), 9118 states have call successors, (9118), 2948 states have call predecessors, (9118), 2944 states have return successors, (10472), 8743 states have call predecessors, (10472), 9116 states have call successors, (10472) [2021-11-23 03:42:52,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33104 states to 33104 states and 47674 transitions. [2021-11-23 03:42:52,580 INFO L78 Accepts]: Start accepts. Automaton has 33104 states and 47674 transitions. Word has length 297 [2021-11-23 03:42:52,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:42:52,583 INFO L470 AbstractCegarLoop]: Abstraction has 33104 states and 47674 transitions. [2021-11-23 03:42:52,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-23 03:42:52,584 INFO L276 IsEmpty]: Start isEmpty. Operand 33104 states and 47674 transitions. [2021-11-23 03:42:52,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2021-11-23 03:42:52,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:42:52,620 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 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, 1, 1, 1, 1, 1] [2021-11-23 03:42:52,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:42:52,621 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:42:52,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:42:52,622 INFO L85 PathProgramCache]: Analyzing trace with hash 985796537, now seen corresponding path program 1 times [2021-11-23 03:42:52,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:42:52,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814042409] [2021-11-23 03:42:52,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:42:52,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:42:52,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:42:53,008 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-11-23 03:42:53,008 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:42:53,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814042409] [2021-11-23 03:42:53,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814042409] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:42:53,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:42:53,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:42:53,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706805394] [2021-11-23 03:42:53,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:42:53,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:42:53,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:42:53,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:42:53,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:42:53,012 INFO L87 Difference]: Start difference. First operand 33104 states and 47674 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-23 03:42:55,122 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:42:57,345 WARN L534 Checker$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 03:43:06,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:43:06,845 INFO L93 Difference]: Finished difference Result 93773 states and 134892 transitions. [2021-11-23 03:43:06,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:43:06,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 331 [2021-11-23 03:43:06,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:43:07,273 INFO L225 Difference]: With dead ends: 93773 [2021-11-23 03:43:07,274 INFO L226 Difference]: Without dead ends: 60729 [2021-11-23 03:43:07,416 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 03:43:07,418 INFO L933 BasicCegarLoop]: 3948 mSDtfsCounter, 2282 mSDsluCounter, 2546 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2282 SdHoareTripleChecker+Valid, 6187 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:43:07,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2282 Valid, 6187 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 851 Invalid, 2 Unknown, 0 Unchecked, 12.1s Time] [2021-11-23 03:43:07,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60729 states. [2021-11-23 03:43:09,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60729 to 60451. [2021-11-23 03:43:10,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60451 states, 38281 states have (on average 1.3326193150649146) internal successors, (51014), 39305 states have internal predecessors, (51014), 16704 states have call successors, (16704), 5480 states have call predecessors, (16704), 5465 states have return successors, (19196), 15984 states have call predecessors, (19196), 16702 states have call successors, (19196) [2021-11-23 03:43:10,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60451 states to 60451 states and 86914 transitions. [2021-11-23 03:43:10,846 INFO L78 Accepts]: Start accepts. Automaton has 60451 states and 86914 transitions. Word has length 331 [2021-11-23 03:43:10,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:43:10,847 INFO L470 AbstractCegarLoop]: Abstraction has 60451 states and 86914 transitions. [2021-11-23 03:43:10,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-23 03:43:10,848 INFO L276 IsEmpty]: Start isEmpty. Operand 60451 states and 86914 transitions. [2021-11-23 03:43:10,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-11-23 03:43:10,948 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:43:10,948 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 12, 12, 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] [2021-11-23 03:43:10,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:43:10,949 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:43:10,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:43:10,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1940707014, now seen corresponding path program 1 times [2021-11-23 03:43:10,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:43:10,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565178170] [2021-11-23 03:43:10,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:43:10,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:43:11,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:43:11,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1570 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1568 trivial. 0 not checked. [2021-11-23 03:43:11,568 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:43:11,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565178170] [2021-11-23 03:43:11,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565178170] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:43:11,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:43:11,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:43:11,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754201216] [2021-11-23 03:43:11,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:43:11,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:43:11,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:43:11,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:43:11,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:43:11,572 INFO L87 Difference]: Start difference. First operand 60451 states and 86914 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2021-11-23 03:43:13,672 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:43:15,858 WARN L534 Checker$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 03:43:18,864 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:43:20,650 WARN L534 Checker$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 03:43:25,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:43:25,824 INFO L93 Difference]: Finished difference Result 120554 states and 173347 transitions. [2021-11-23 03:43:25,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:43:25,825 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) Word has length 362 [2021-11-23 03:43:25,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:43:26,175 INFO L225 Difference]: With dead ends: 120554 [2021-11-23 03:43:26,176 INFO L226 Difference]: Without dead ends: 60472 [2021-11-23 03:43:26,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 03:43:26,414 INFO L933 BasicCegarLoop]: 2252 mSDtfsCounter, 8 mSDsluCounter, 5116 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 6750 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:43:26,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 6750 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 937 Invalid, 2 Unknown, 0 Unchecked, 12.1s Time] [2021-11-23 03:43:26,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60472 states. [2021-11-23 03:43:28,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60472 to 60453. [2021-11-23 03:43:28,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60453 states, 38283 states have (on average 1.33228848313873) internal successors, (51004), 39307 states have internal predecessors, (51004), 16704 states have call successors, (16704), 5480 states have call predecessors, (16704), 5465 states have return successors, (19196), 15984 states have call predecessors, (19196), 16702 states have call successors, (19196) [2021-11-23 03:43:29,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60453 states to 60453 states and 86904 transitions. [2021-11-23 03:43:29,019 INFO L78 Accepts]: Start accepts. Automaton has 60453 states and 86904 transitions. Word has length 362 [2021-11-23 03:43:29,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:43:29,019 INFO L470 AbstractCegarLoop]: Abstraction has 60453 states and 86904 transitions. [2021-11-23 03:43:29,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2021-11-23 03:43:29,020 INFO L276 IsEmpty]: Start isEmpty. Operand 60453 states and 86904 transitions. [2021-11-23 03:43:29,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2021-11-23 03:43:29,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:43:29,094 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:43:29,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 03:43:29,094 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:43:29,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:43:29,095 INFO L85 PathProgramCache]: Analyzing trace with hash -301203564, now seen corresponding path program 1 times [2021-11-23 03:43:29,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:43:29,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312394739] [2021-11-23 03:43:29,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:43:29,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:43:29,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:43:29,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1580 trivial. 0 not checked. [2021-11-23 03:43:29,568 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:43:29,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312394739] [2021-11-23 03:43:29,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312394739] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:43:29,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:43:29,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:43:29,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161429119] [2021-11-23 03:43:29,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:43:29,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:43:29,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:43:29,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:43:29,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:43:29,572 INFO L87 Difference]: Start difference. First operand 60453 states and 86904 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) [2021-11-23 03:43:31,672 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:43:33,787 WARN L534 Checker$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 03:43:37,112 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:43:39,162 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:43:43,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:43:43,509 INFO L93 Difference]: Finished difference Result 136722 states and 196878 transitions. [2021-11-23 03:43:43,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:43:43,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) Word has length 368 [2021-11-23 03:43:43,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:43:44,205 INFO L225 Difference]: With dead ends: 136722 [2021-11-23 03:43:44,205 INFO L226 Difference]: Without dead ends: 84966 [2021-11-23 03:43:44,395 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 03:43:44,396 INFO L933 BasicCegarLoop]: 2790 mSDtfsCounter, 2301 mSDsluCounter, 2521 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2301 SdHoareTripleChecker+Valid, 5010 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:43:44,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2301 Valid, 5010 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 660 Invalid, 2 Unknown, 0 Unchecked, 11.5s Time] [2021-11-23 03:43:44,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84966 states. [2021-11-23 03:43:47,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84966 to 84804. [2021-11-23 03:43:47,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84804 states, 53676 states have (on average 1.3316379760041732) internal successors, (71477), 55099 states have internal predecessors, (71477), 23451 states have call successors, (23451), 7705 states have call predecessors, (23451), 7676 states have return successors, (27337), 22444 states have call predecessors, (27337), 23449 states have call successors, (27337) [2021-11-23 03:43:47,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84804 states to 84804 states and 122265 transitions. [2021-11-23 03:43:47,755 INFO L78 Accepts]: Start accepts. Automaton has 84804 states and 122265 transitions. Word has length 368 [2021-11-23 03:43:47,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:43:47,757 INFO L470 AbstractCegarLoop]: Abstraction has 84804 states and 122265 transitions. [2021-11-23 03:43:47,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) [2021-11-23 03:43:47,757 INFO L276 IsEmpty]: Start isEmpty. Operand 84804 states and 122265 transitions. [2021-11-23 03:43:47,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2021-11-23 03:43:47,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:43:47,849 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 12, 12, 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] [2021-11-23 03:43:47,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:43:47,849 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:43:47,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:43:47,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1409901480, now seen corresponding path program 1 times [2021-11-23 03:43:47,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:43:47,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853039142] [2021-11-23 03:43:47,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:43:47,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:43:48,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:43:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1570 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1568 trivial. 0 not checked. [2021-11-23 03:43:48,611 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:43:48,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853039142] [2021-11-23 03:43:48,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853039142] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:43:48,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:43:48,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:43:48,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918009834] [2021-11-23 03:43:48,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:43:48,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:43:48,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:43:48,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:43:48,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:43:48,614 INFO L87 Difference]: Start difference. First operand 84804 states and 122265 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2021-11-23 03:43:50,721 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:43:52,836 WARN L534 Checker$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 03:43:55,149 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:43:58,719 WARN L534 Checker$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 03:44:00,241 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 03:44:05,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:44:05,456 INFO L93 Difference]: Finished difference Result 214178 states and 308923 transitions. [2021-11-23 03:44:05,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:44:05,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) Word has length 369 [2021-11-23 03:44:05,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:44:06,530 INFO L225 Difference]: With dead ends: 214178 [2021-11-23 03:44:06,531 INFO L226 Difference]: Without dead ends: 129767 [2021-11-23 03:44:06,855 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 03:44:06,856 INFO L933 BasicCegarLoop]: 3013 mSDtfsCounter, 2229 mSDsluCounter, 2429 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 61 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2229 SdHoareTripleChecker+Valid, 5138 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:44:06,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2229 Valid, 5138 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 790 Invalid, 3 Unknown, 0 Unchecked, 12.9s Time] [2021-11-23 03:44:06,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129767 states. [2021-11-23 03:44:11,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129767 to 129734. [2021-11-23 03:44:11,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129734 states, 82496 states have (on average 1.327591640806827) internal successors, (109521), 84691 states have internal predecessors, (109521), 35519 states have call successors, (35519), 11771 states have call predecessors, (35519), 11718 states have return successors, (41223), 33960 states have call predecessors, (41223), 35517 states have call successors, (41223) [2021-11-23 03:44:12,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129734 states to 129734 states and 186263 transitions. [2021-11-23 03:44:12,234 INFO L78 Accepts]: Start accepts. Automaton has 129734 states and 186263 transitions. Word has length 369 [2021-11-23 03:44:12,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:44:12,235 INFO L470 AbstractCegarLoop]: Abstraction has 129734 states and 186263 transitions. [2021-11-23 03:44:12,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2021-11-23 03:44:12,235 INFO L276 IsEmpty]: Start isEmpty. Operand 129734 states and 186263 transitions. [2021-11-23 03:44:12,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2021-11-23 03:44:12,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:44:12,296 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 12, 12, 4, 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] [2021-11-23 03:44:12,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 03:44:12,296 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:44:12,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:44:12,297 INFO L85 PathProgramCache]: Analyzing trace with hash -470488700, now seen corresponding path program 1 times [2021-11-23 03:44:12,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:44:12,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850886872] [2021-11-23 03:44:12,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:44:12,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:44:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:44:13,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1572 trivial. 0 not checked. [2021-11-23 03:44:13,744 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:44:13,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850886872] [2021-11-23 03:44:13,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850886872] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:44:13,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953547121] [2021-11-23 03:44:13,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:44:13,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:44:13,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901fb3d3-50ab-48bc-83d6-8a043a8b7ae1/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:44:13,748 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901fb3d3-50ab-48bc-83d6-8a043a8b7ae1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:44:13,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901fb3d3-50ab-48bc-83d6-8a043a8b7ae1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:44:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:44:15,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 7464 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:44:15,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:44:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 666 proven. 0 refuted. 0 times theorem prover too weak. 910 trivial. 0 not checked. [2021-11-23 03:44:16,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:44:16,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953547121] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:44:16,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:44:16,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-11-23 03:44:16,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574045366] [2021-11-23 03:44:16,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:44:16,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:44:16,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:44:16,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:44:16,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:44:16,822 INFO L87 Difference]: Start difference. First operand 129734 states and 186263 transitions. Second operand has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 3 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) [2021-11-23 03:44:18,913 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:44:21,093 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:44:24,715 WARN L534 Checker$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 03:44:28,374 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:44:30,903 WARN L534 Checker$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 03:44:39,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:44:39,153 INFO L93 Difference]: Finished difference Result 208215 states and 298661 transitions. [2021-11-23 03:44:39,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:44:39,163 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 3 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) Word has length 379 [2021-11-23 03:44:39,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:44:39,598 INFO L225 Difference]: With dead ends: 208215 [2021-11-23 03:44:39,599 INFO L226 Difference]: Without dead ends: 78754 [2021-11-23 03:44:40,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:44:40,025 INFO L933 BasicCegarLoop]: 2257 mSDtfsCounter, 19 mSDsluCounter, 7666 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 9001 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:44:40,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 9001 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1250 Invalid, 3 Unknown, 0 Unchecked, 18.3s Time] [2021-11-23 03:44:40,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78754 states.