./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--intel--igbvf--igbvf.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5b36d44f Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--intel--igbvf--igbvf.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 29069a6562e86cf14ec2af6e66fde431300c67391fef8a4bef75c88d837db303 --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5b36d44 [2021-11-07 13:08:59,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 13:08:59,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 13:08:59,487 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 13:08:59,487 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 13:08:59,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 13:08:59,491 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 13:08:59,493 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 13:08:59,494 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 13:08:59,497 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 13:08:59,498 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 13:08:59,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 13:08:59,499 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 13:08:59,500 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 13:08:59,502 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 13:08:59,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 13:08:59,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 13:08:59,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 13:08:59,508 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 13:08:59,512 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 13:08:59,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 13:08:59,514 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 13:08:59,515 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 13:08:59,515 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 13:08:59,520 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 13:08:59,520 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 13:08:59,520 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 13:08:59,521 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 13:08:59,522 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 13:08:59,522 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 13:08:59,522 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 13:08:59,523 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 13:08:59,524 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 13:08:59,525 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 13:08:59,526 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 13:08:59,526 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 13:08:59,526 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 13:08:59,526 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 13:08:59,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 13:08:59,527 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 13:08:59,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 13:08:59,528 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-07 13:08:59,554 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 13:08:59,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 13:08:59,555 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 13:08:59,555 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 13:08:59,556 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 13:08:59,556 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 13:08:59,556 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 13:08:59,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 13:08:59,557 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 13:08:59,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 13:08:59,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 13:08:59,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 13:08:59,558 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 13:08:59,558 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 13:08:59,558 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 13:08:59,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 13:08:59,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 13:08:59,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 13:08:59,559 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 13:08:59,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 13:08:59,559 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 13:08:59,559 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 13:08:59,559 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 13:08:59,559 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 13:08:59,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 13:08:59,560 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 13:08:59,560 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 13:08:59,560 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 13:08:59,560 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 13:08:59,560 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 29069a6562e86cf14ec2af6e66fde431300c67391fef8a4bef75c88d837db303 [2021-11-07 13:08:59,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 13:08:59,776 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 13:08:59,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 13:08:59,779 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 13:08:59,780 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 13:08:59,780 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--intel--igbvf--igbvf.ko-entry_point.cil.out.i [2021-11-07 13:08:59,831 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78a6956da/c9c531a5d0524b33a7a4f09a0c7adb71/FLAG1bc6538a6 [2021-11-07 13:09:00,497 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 13:09:00,497 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--intel--igbvf--igbvf.ko-entry_point.cil.out.i [2021-11-07 13:09:00,545 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78a6956da/c9c531a5d0524b33a7a4f09a0c7adb71/FLAG1bc6538a6 [2021-11-07 13:09:00,587 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78a6956da/c9c531a5d0524b33a7a4f09a0c7adb71 [2021-11-07 13:09:00,589 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 13:09:00,589 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 13:09:00,590 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 13:09:00,590 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 13:09:00,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 13:09:00,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:09:00" (1/1) ... [2021-11-07 13:09:00,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56778ef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:00, skipping insertion in model container [2021-11-07 13:09:00,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:09:00" (1/1) ... [2021-11-07 13:09:00,598 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 13:09:00,696 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 13:09:01,201 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--intel--igbvf--igbvf.ko-entry_point.cil.out.i[183631,183644] [2021-11-07 13:09:02,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 13:09:02,910 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 13:09:02,983 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--intel--igbvf--igbvf.ko-entry_point.cil.out.i[183631,183644] [2021-11-07 13:09:03,197 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 13:09:03,496 INFO L208 MainTranslator]: Completed translation [2021-11-07 13:09:03,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:03 WrapperNode [2021-11-07 13:09:03,496 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 13:09:03,498 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 13:09:03,498 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 13:09:03,498 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 13:09:03,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:03" (1/1) ... [2021-11-07 13:09:03,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:03" (1/1) ... [2021-11-07 13:09:04,723 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 13:09:04,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 13:09:04,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 13:09:04,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 13:09:04,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:03" (1/1) ... [2021-11-07 13:09:04,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:03" (1/1) ... [2021-11-07 13:09:05,197 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:03" (1/1) ... [2021-11-07 13:09:05,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:03" (1/1) ... [2021-11-07 13:09:05,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:03" (1/1) ... [2021-11-07 13:09:06,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:03" (1/1) ... [2021-11-07 13:09:06,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:03" (1/1) ... [2021-11-07 13:09:06,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 13:09:06,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 13:09:06,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 13:09:06,345 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 13:09:06,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:03" (1/1) ... [2021-11-07 13:09:06,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 13:09:06,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:09:06,384 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 13:09:06,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 13:09:06,435 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_reset_hw_vf [2021-11-07 13:09:06,435 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_reset_hw_vf [2021-11-07 13:09:06,435 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u32 [2021-11-07 13:09:06,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 13:09:06,436 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-07 13:09:06,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-07 13:09:06,436 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 13:09:06,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u16 [2021-11-07 13:09:06,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 13:09:06,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 13:09:06,436 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_write_posted_mbx [2021-11-07 13:09:06,436 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_write_posted_mbx [2021-11-07 13:09:06,437 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_init_hw_vf [2021-11-07 13:09:06,437 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_init_hw_vf [2021-11-07 13:09:06,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 13:09:06,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 13:09:06,437 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_poll_for_ack [2021-11-07 13:09:06,437 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_poll_for_ack [2021-11-07 13:09:06,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 13:09:06,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 13:09:06,438 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_rar_set_vf [2021-11-07 13:09:06,438 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_rar_set_vf [2021-11-07 13:09:06,438 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_check_for_link_vf [2021-11-07 13:09:06,438 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_check_for_link_vf [2021-11-07 13:09:06,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 13:09:06,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 13:09:06,438 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~~s32~0 [2021-11-07 13:09:06,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~~s32~0 [2021-11-07 13:09:06,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 13:09:06,439 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~~u16~0~TO~~s32~0 [2021-11-07 13:09:06,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~~u16~0~TO~~s32~0 [2021-11-07 13:09:06,439 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_poll_for_msg [2021-11-07 13:09:06,439 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_poll_for_msg [2021-11-07 13:09:06,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 13:09:06,439 INFO L130 BoogieDeclarations]: Found specification of procedure e1000_read_posted_mbx [2021-11-07 13:09:06,439 INFO L138 BoogieDeclarations]: Found implementation of procedure e1000_read_posted_mbx [2021-11-07 13:09:06,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 13:09:06,440 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-07 13:09:29,283 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 13:09:29,284 INFO L299 CfgBuilder]: Removed 8531 assume(true) statements. [2021-11-07 13:09:29,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:09:29 BoogieIcfgContainer [2021-11-07 13:09:29,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 13:09:29,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 13:09:29,291 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 13:09:29,293 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 13:09:29,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:09:00" (1/3) ... [2021-11-07 13:09:29,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@413eaea2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:09:29, skipping insertion in model container [2021-11-07 13:09:29,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:03" (2/3) ... [2021-11-07 13:09:29,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@413eaea2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:09:29, skipping insertion in model container [2021-11-07 13:09:29,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:09:29" (3/3) ... [2021-11-07 13:09:29,295 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--intel--igbvf--igbvf.ko-entry_point.cil.out.i [2021-11-07 13:09:29,298 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 13:09:29,298 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 13:09:29,355 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 13:09:29,362 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 13:09:29,364 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 13:09:29,449 INFO L276 IsEmpty]: Start isEmpty. Operand has 8673 states, 8538 states have (on average 1.3836964160224876) internal successors, (11814), 8539 states have internal predecessors, (11814), 123 states have call successors, (123), 10 states have call predecessors, (123), 10 states have return successors, (123), 123 states have call predecessors, (123), 123 states have call successors, (123) [2021-11-07 13:09:29,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 13:09:29,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:09:29,468 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:09:29,469 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:09:29,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:09:29,473 INFO L85 PathProgramCache]: Analyzing trace with hash -589120283, now seen corresponding path program 1 times [2021-11-07 13:09:29,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:09:29,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100144065] [2021-11-07 13:09:29,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:09:29,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:09:29,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:09:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:09:29,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:09:29,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100144065] [2021-11-07 13:09:29,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100144065] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:09:29,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:09:29,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:09:29,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862264687] [2021-11-07 13:09:29,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:09:29,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:09:29,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:09:29,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:09:29,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:09:29,974 INFO L87 Difference]: Start difference. First operand has 8673 states, 8538 states have (on average 1.3836964160224876) internal successors, (11814), 8539 states have internal predecessors, (11814), 123 states have call successors, (123), 10 states have call predecessors, (123), 10 states have return successors, (123), 123 states have call predecessors, (123), 123 states have call successors, (123) Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:09:31,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:09:31,440 INFO L93 Difference]: Finished difference Result 25908 states and 36030 transitions. [2021-11-07 13:09:31,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:09:31,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 13:09:31,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:09:31,525 INFO L225 Difference]: With dead ends: 25908 [2021-11-07 13:09:31,525 INFO L226 Difference]: Without dead ends: 16918 [2021-11-07 13:09:31,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.80ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:09:31,559 INFO L933 BasicCegarLoop]: 12002 mSDtfsCounter, 11744 mSDsluCounter, 11867 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 734.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11744 SdHoareTripleChecker+Valid, 23869 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 55.48ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 812.23ms IncrementalHoareTripleChecker+Time [2021-11-07 13:09:31,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11744 Valid, 23869 Invalid, 15 Unknown, 0 Unchecked, 55.48ms Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 812.23ms Time] [2021-11-07 13:09:31,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16918 states. [2021-11-07 13:09:31,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16918 to 16918. [2021-11-07 13:09:32,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16918 states, 16651 states have (on average 1.3513903068884752) internal successors, (22502), 16651 states have internal predecessors, (22502), 246 states have call successors, (246), 20 states have call predecessors, (246), 20 states have return successors, (246), 246 states have call predecessors, (246), 246 states have call successors, (246) [2021-11-07 13:09:32,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16918 states to 16918 states and 22994 transitions. [2021-11-07 13:09:32,076 INFO L78 Accepts]: Start accepts. Automaton has 16918 states and 22994 transitions. Word has length 44 [2021-11-07 13:09:32,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:09:32,076 INFO L470 AbstractCegarLoop]: Abstraction has 16918 states and 22994 transitions. [2021-11-07 13:09:32,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:09:32,078 INFO L276 IsEmpty]: Start isEmpty. Operand 16918 states and 22994 transitions. [2021-11-07 13:09:32,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 13:09:32,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:09:32,085 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:09:32,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 13:09:32,085 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:09:32,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:09:32,087 INFO L85 PathProgramCache]: Analyzing trace with hash 2021164542, now seen corresponding path program 1 times [2021-11-07 13:09:32,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:09:32,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369268566] [2021-11-07 13:09:32,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:09:32,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:09:32,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:09:32,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:09:32,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:09:32,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369268566] [2021-11-07 13:09:32,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369268566] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:09:32,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:09:32,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 13:09:32,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971140643] [2021-11-07 13:09:32,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:09:32,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 13:09:32,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:09:32,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 13:09:32,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:09:32,413 INFO L87 Difference]: Start difference. First operand 16918 states and 22994 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:09:33,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:09:33,256 INFO L93 Difference]: Finished difference Result 33792 states and 45933 transitions. [2021-11-07 13:09:33,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 13:09:33,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-07 13:09:33,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:09:33,380 INFO L225 Difference]: With dead ends: 33792 [2021-11-07 13:09:33,384 INFO L226 Difference]: Without dead ends: 33786 [2021-11-07 13:09:33,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.17ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 13:09:33,411 INFO L933 BasicCegarLoop]: 11827 mSDtfsCounter, 11503 mSDsluCounter, 35032 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 285.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11503 SdHoareTripleChecker+Valid, 46859 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 56.43ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 363.44ms IncrementalHoareTripleChecker+Time [2021-11-07 13:09:33,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11503 Valid, 46859 Invalid, 509 Unknown, 0 Unchecked, 56.43ms Time], IncrementalHoareTripleChecker [1 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 363.44ms Time] [2021-11-07 13:09:33,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33786 states. [2021-11-07 13:09:34,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33786 to 33586. [2021-11-07 13:09:34,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33586 states, 33053 states have (on average 1.3521314252866607) internal successors, (44692), 33053 states have internal predecessors, (44692), 492 states have call successors, (492), 40 states have call predecessors, (492), 40 states have return successors, (492), 492 states have call predecessors, (492), 492 states have call successors, (492) [2021-11-07 13:09:34,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33586 states to 33586 states and 45676 transitions. [2021-11-07 13:09:34,210 INFO L78 Accepts]: Start accepts. Automaton has 33586 states and 45676 transitions. Word has length 47 [2021-11-07 13:09:34,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:09:34,211 INFO L470 AbstractCegarLoop]: Abstraction has 33586 states and 45676 transitions. [2021-11-07 13:09:34,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:09:34,211 INFO L276 IsEmpty]: Start isEmpty. Operand 33586 states and 45676 transitions. [2021-11-07 13:09:34,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-07 13:09:34,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:09:34,263 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-07 13:09:34,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 13:09:34,263 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:09:34,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:09:34,264 INFO L85 PathProgramCache]: Analyzing trace with hash 2013302414, now seen corresponding path program 1 times [2021-11-07 13:09:34,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:09:34,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671762325] [2021-11-07 13:09:34,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:09:34,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:09:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:09:34,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-07 13:09:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:09:34,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-07 13:09:34,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:09:34,502 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 13:09:34,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:09:34,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671762325] [2021-11-07 13:09:34,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671762325] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:09:34,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:09:34,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 13:09:34,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640008679] [2021-11-07 13:09:34,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:09:34,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:09:34,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:09:34,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:09:34,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:09:34,507 INFO L87 Difference]: Start difference. First operand 33586 states and 45676 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 13:09:37,478 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 13:09:38,556 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 13:09:50,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:09:50,671 INFO L93 Difference]: Finished difference Result 97226 states and 133104 transitions. [2021-11-07 13:09:50,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 13:09:50,671 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 155 [2021-11-07 13:09:50,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:09:50,868 INFO L225 Difference]: With dead ends: 97226 [2021-11-07 13:09:50,868 INFO L226 Difference]: Without dead ends: 63684 [2021-11-07 13:09:50,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.76ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:09:50,964 INFO L933 BasicCegarLoop]: 11778 mSDtfsCounter, 10439 mSDsluCounter, 18741 mSDsCounter, 0 mSdLazyCounter, 4562 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13396.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10468 SdHoareTripleChecker+Valid, 30519 SdHoareTripleChecker+Invalid, 4852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 55.05ms SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 4562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14952.98ms IncrementalHoareTripleChecker+Time [2021-11-07 13:09:50,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10468 Valid, 30519 Invalid, 4852 Unknown, 0 Unchecked, 55.05ms Time], IncrementalHoareTripleChecker [290 Valid, 4562 Invalid, 0 Unknown, 0 Unchecked, 14952.98ms Time] [2021-11-07 13:09:51,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63684 states. [2021-11-07 13:09:52,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63684 to 63178. [2021-11-07 13:09:52,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63178 states, 62177 states have (on average 1.3530083471380092) internal successors, (84126), 62177 states have internal predecessors, (84126), 920 states have call successors, (920), 80 states have call predecessors, (920), 80 states have return successors, (920), 920 states have call predecessors, (920), 920 states have call successors, (920) [2021-11-07 13:09:52,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63178 states to 63178 states and 85966 transitions. [2021-11-07 13:09:52,696 INFO L78 Accepts]: Start accepts. Automaton has 63178 states and 85966 transitions. Word has length 155 [2021-11-07 13:09:52,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:09:52,697 INFO L470 AbstractCegarLoop]: Abstraction has 63178 states and 85966 transitions. [2021-11-07 13:09:52,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 13:09:52,698 INFO L276 IsEmpty]: Start isEmpty. Operand 63178 states and 85966 transitions. [2021-11-07 13:09:52,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-07 13:09:52,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:09:52,782 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:09:52,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 13:09:52,783 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:09:52,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:09:52,784 INFO L85 PathProgramCache]: Analyzing trace with hash -920622097, now seen corresponding path program 1 times [2021-11-07 13:09:52,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:09:52,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280738126] [2021-11-07 13:09:52,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:09:52,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:09:52,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:09:53,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-07 13:09:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:09:53,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-07 13:09:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:09:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 13:09:53,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:09:53,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280738126] [2021-11-07 13:09:53,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280738126] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:09:53,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:09:53,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 13:09:53,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970893552] [2021-11-07 13:09:53,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:09:53,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:09:53,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:09:53,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:09:53,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:09:53,317 INFO L87 Difference]: Start difference. First operand 63178 states and 85966 transitions. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 13:09:54,900 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 13:09:58,016 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 13:10:00,898 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 13:10:12,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:10:12,961 INFO L93 Difference]: Finished difference Result 170166 states and 233282 transitions. [2021-11-07 13:10:12,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 13:10:12,962 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 171 [2021-11-07 13:10:12,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:10:13,399 INFO L225 Difference]: With dead ends: 170166 [2021-11-07 13:10:13,399 INFO L226 Difference]: Without dead ends: 107032 [2021-11-07 13:10:13,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.87ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:10:13,498 INFO L933 BasicCegarLoop]: 13064 mSDtfsCounter, 8305 mSDsluCounter, 19548 mSDsCounter, 0 mSdLazyCounter, 5039 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16053.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8349 SdHoareTripleChecker+Valid, 32612 SdHoareTripleChecker+Invalid, 5296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 53.93ms SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 5039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17931.58ms IncrementalHoareTripleChecker+Time [2021-11-07 13:10:13,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8349 Valid, 32612 Invalid, 5296 Unknown, 0 Unchecked, 53.93ms Time], IncrementalHoareTripleChecker [257 Valid, 5039 Invalid, 0 Unknown, 0 Unchecked, 17931.58ms Time] [2021-11-07 13:10:13,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107032 states. [2021-11-07 13:10:15,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107032 to 106194. [2021-11-07 13:10:15,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106194 states, 104457 states have (on average 1.3560986817542147) internal successors, (141654), 104457 states have internal predecessors, (141654), 1576 states have call successors, (1576), 160 states have call predecessors, (1576), 160 states have return successors, (1576), 1576 states have call predecessors, (1576), 1576 states have call successors, (1576) [2021-11-07 13:10:16,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106194 states to 106194 states and 144806 transitions. [2021-11-07 13:10:16,229 INFO L78 Accepts]: Start accepts. Automaton has 106194 states and 144806 transitions. Word has length 171 [2021-11-07 13:10:16,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:10:16,230 INFO L470 AbstractCegarLoop]: Abstraction has 106194 states and 144806 transitions. [2021-11-07 13:10:16,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 13:10:16,230 INFO L276 IsEmpty]: Start isEmpty. Operand 106194 states and 144806 transitions. [2021-11-07 13:10:16,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-07 13:10:16,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:10:16,345 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:10:16,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 13:10:16,346 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:10:16,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:10:16,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1438137957, now seen corresponding path program 1 times [2021-11-07 13:10:16,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:10:16,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498527821] [2021-11-07 13:10:16,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:10:16,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:10:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:10:16,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-07 13:10:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:10:16,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-07 13:10:16,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:10:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 13:10:16,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:10:16,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498527821] [2021-11-07 13:10:16,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498527821] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:10:16,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:10:16,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 13:10:16,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730356329] [2021-11-07 13:10:16,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:10:16,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:10:16,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:10:16,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:10:16,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:10:16,593 INFO L87 Difference]: Start difference. First operand 106194 states and 144806 transitions. Second operand has 4 states, 4 states have (on average 44.5) internal successors, (178), 3 states have internal predecessors, (178), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 13:10:21,333 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 13:10:23,351 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 13:10:45,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:10:45,258 INFO L93 Difference]: Finished difference Result 263010 states and 360826 transitions. [2021-11-07 13:10:45,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 13:10:45,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 3 states have internal predecessors, (178), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 191 [2021-11-07 13:10:45,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:10:45,966 INFO L225 Difference]: With dead ends: 263010 [2021-11-07 13:10:45,966 INFO L226 Difference]: Without dead ends: 156860 [2021-11-07 13:10:46,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.43ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:10:46,126 INFO L933 BasicCegarLoop]: 18395 mSDtfsCounter, 10636 mSDsluCounter, 22587 mSDsCounter, 0 mSdLazyCounter, 7012 mSolverCounterSat, 228 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23278.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10691 SdHoareTripleChecker+Valid, 40982 SdHoareTripleChecker+Invalid, 7242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 123.52ms SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 7012 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25938.28ms IncrementalHoareTripleChecker+Time [2021-11-07 13:10:46,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10691 Valid, 40982 Invalid, 7242 Unknown, 0 Unchecked, 123.52ms Time], IncrementalHoareTripleChecker [228 Valid, 7012 Invalid, 2 Unknown, 0 Unchecked, 25938.28ms Time] [2021-11-07 13:10:46,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156860 states. [2021-11-07 13:10:48,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156860 to 155522. [2021-11-07 13:10:49,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155522 states, 152981 states have (on average 1.3564429569685124) internal successors, (207510), 152981 states have internal predecessors, (207510), 2300 states have call successors, (2300), 240 states have call predecessors, (2300), 240 states have return successors, (2300), 2300 states have call predecessors, (2300), 2300 states have call successors, (2300) [2021-11-07 13:10:49,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155522 states to 155522 states and 212110 transitions. [2021-11-07 13:10:49,534 INFO L78 Accepts]: Start accepts. Automaton has 155522 states and 212110 transitions. Word has length 191 [2021-11-07 13:10:49,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:10:49,534 INFO L470 AbstractCegarLoop]: Abstraction has 155522 states and 212110 transitions. [2021-11-07 13:10:49,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 3 states have internal predecessors, (178), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 13:10:49,535 INFO L276 IsEmpty]: Start isEmpty. Operand 155522 states and 212110 transitions. [2021-11-07 13:10:50,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-07 13:10:50,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:10:50,023 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:10:50,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 13:10:50,024 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:10:50,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:10:50,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1804635881, now seen corresponding path program 1 times [2021-11-07 13:10:50,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:10:50,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10110470] [2021-11-07 13:10:50,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:10:50,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:10:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:10:50,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-07 13:10:50,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:10:50,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-07 13:10:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:10:50,245 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 13:10:50,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:10:50,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10110470] [2021-11-07 13:10:50,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10110470] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:10:50,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:10:50,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 13:10:50,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947566055] [2021-11-07 13:10:50,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:10:50,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:10:50,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:10:50,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:10:50,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:10:50,247 INFO L87 Difference]: Start difference. First operand 155522 states and 212110 transitions. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 13:10:54,885 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 13:10:57,860 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 13:10:59,108 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 13:11:14,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:11:14,435 INFO L93 Difference]: Finished difference Result 468026 states and 641948 transitions. [2021-11-07 13:11:14,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 13:11:14,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 191 [2021-11-07 13:11:14,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:11:15,563 INFO L225 Difference]: With dead ends: 468026 [2021-11-07 13:11:15,563 INFO L226 Difference]: Without dead ends: 312548 [2021-11-07 13:11:15,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.38ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:11:15,891 INFO L933 BasicCegarLoop]: 11833 mSDtfsCounter, 11531 mSDsluCounter, 18730 mSDsCounter, 0 mSdLazyCounter, 4728 mSolverCounterSat, 353 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17248.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11571 SdHoareTripleChecker+Valid, 30563 SdHoareTripleChecker+Invalid, 5082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 54.97ms SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 4728 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19189.44ms IncrementalHoareTripleChecker+Time [2021-11-07 13:11:15,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11571 Valid, 30563 Invalid, 5082 Unknown, 0 Unchecked, 54.97ms Time], IncrementalHoareTripleChecker [353 Valid, 4728 Invalid, 1 Unknown, 0 Unchecked, 19189.44ms Time] [2021-11-07 13:11:16,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312548 states. [2021-11-07 13:11:22,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312548 to 310046. [2021-11-07 13:11:23,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310046 states, 304965 states have (on average 1.3529421409014148) internal successors, (412600), 304965 states have internal predecessors, (412600), 4600 states have call successors, (4600), 480 states have call predecessors, (4600), 480 states have return successors, (4600), 4600 states have call predecessors, (4600), 4600 states have call successors, (4600) [2021-11-07 13:11:24,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310046 states to 310046 states and 421800 transitions. [2021-11-07 13:11:24,062 INFO L78 Accepts]: Start accepts. Automaton has 310046 states and 421800 transitions. Word has length 191 [2021-11-07 13:11:24,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:11:24,063 INFO L470 AbstractCegarLoop]: Abstraction has 310046 states and 421800 transitions. [2021-11-07 13:11:24,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 13:11:24,063 INFO L276 IsEmpty]: Start isEmpty. Operand 310046 states and 421800 transitions. [2021-11-07 13:11:24,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-07 13:11:24,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:11:24,841 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:11:24,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 13:11:24,842 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:11:24,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:11:24,842 INFO L85 PathProgramCache]: Analyzing trace with hash 2082169982, now seen corresponding path program 1 times [2021-11-07 13:11:24,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:11:24,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729727227] [2021-11-07 13:11:24,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:11:24,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:11:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:11:25,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-07 13:11:25,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:11:25,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-07 13:11:25,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:11:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 13:11:25,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:11:25,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729727227] [2021-11-07 13:11:25,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729727227] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:11:25,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:11:25,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 13:11:25,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370952556] [2021-11-07 13:11:25,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:11:25,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:11:25,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:11:25,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:11:25,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:11:25,046 INFO L87 Difference]: Start difference. First operand 310046 states and 421800 transitions. Second operand has 4 states, 4 states have (on average 44.5) internal successors, (178), 3 states have internal predecessors, (178), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 13:11:28,389 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []