./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ntdrivers/diskperf.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/ntdrivers/diskperf.i.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-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 32bit --witnessprinter.graph.data.programhash f0996d70f204c5713a65b04e25037e48d7532ec1ba0c10162e12c5c0d518b4e3 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 08:35:28,198 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 08:35:28,200 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 08:35:28,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 08:35:28,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 08:35:28,262 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 08:35:28,264 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 08:35:28,266 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 08:35:28,272 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 08:35:28,280 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 08:35:28,280 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 08:35:28,281 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 08:35:28,282 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 08:35:28,284 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 08:35:28,285 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 08:35:28,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 08:35:28,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 08:35:28,288 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 08:35:28,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 08:35:28,294 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 08:35:28,295 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 08:35:28,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 08:35:28,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 08:35:28,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 08:35:28,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 08:35:28,306 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 08:35:28,306 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 08:35:28,307 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 08:35:28,308 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 08:35:28,308 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 08:35:28,308 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 08:35:28,309 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 08:35:28,310 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 08:35:28,311 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 08:35:28,312 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 08:35:28,312 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 08:35:28,312 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 08:35:28,313 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 08:35:28,313 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 08:35:28,313 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 08:35:28,314 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 08:35:28,315 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 08:35:28,334 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 08:35:28,335 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 08:35:28,335 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 08:35:28,335 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 08:35:28,336 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 08:35:28,336 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 08:35:28,337 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 08:35:28,337 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 08:35:28,337 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 08:35:28,337 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 08:35:28,338 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 08:35:28,338 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 08:35:28,338 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 08:35:28,338 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 08:35:28,339 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 08:35:28,339 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 08:35:28,339 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 08:35:28,339 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 08:35:28,339 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 08:35:28,339 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 08:35:28,339 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 08:35:28,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 08:35:28,340 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 08:35:28,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 08:35:28,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:35:28,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 08:35:28,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 08:35:28,341 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 08:35:28,342 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 08:35:28,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 08:35:28,342 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 08:35:28,342 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 08:35:28,342 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 08:35:28,342 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 08:35:28,343 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0996d70f204c5713a65b04e25037e48d7532ec1ba0c10162e12c5c0d518b4e3 [2021-12-22 08:35:28,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 08:35:28,571 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 08:35:28,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 08:35:28,573 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 08:35:28,574 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 08:35:28,575 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/diskperf.i.cil-1.c [2021-12-22 08:35:28,631 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1e7e769f/fb5d55637cef454fadbf968874ebb018/FLAG5621bd7ec [2021-12-22 08:35:29,180 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 08:35:29,180 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/diskperf.i.cil-1.c [2021-12-22 08:35:29,211 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1e7e769f/fb5d55637cef454fadbf968874ebb018/FLAG5621bd7ec [2021-12-22 08:35:29,423 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1e7e769f/fb5d55637cef454fadbf968874ebb018 [2021-12-22 08:35:29,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 08:35:29,427 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 08:35:29,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 08:35:29,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 08:35:29,433 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 08:35:29,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:35:29" (1/1) ... [2021-12-22 08:35:29,435 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e7b7eab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:29, skipping insertion in model container [2021-12-22 08:35:29,435 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:35:29" (1/1) ... [2021-12-22 08:35:29,441 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 08:35:29,505 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 08:35:29,895 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/diskperf.i.cil-1.c[84645,84658] [2021-12-22 08:35:30,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:35:30,177 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 08:35:30,248 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/diskperf.i.cil-1.c[84645,84658] [2021-12-22 08:35:30,394 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:35:30,454 INFO L208 MainTranslator]: Completed translation [2021-12-22 08:35:30,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:30 WrapperNode [2021-12-22 08:35:30,455 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 08:35:30,456 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 08:35:30,456 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 08:35:30,456 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 08:35:30,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:30" (1/1) ... [2021-12-22 08:35:30,531 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:30" (1/1) ... [2021-12-22 08:35:30,609 INFO L137 Inliner]: procedures = 127, calls = 1459, calls flagged for inlining = 20, calls inlined = 18, statements flattened = 3749 [2021-12-22 08:35:30,609 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 08:35:30,610 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 08:35:30,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 08:35:30,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 08:35:30,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:30" (1/1) ... [2021-12-22 08:35:30,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:30" (1/1) ... [2021-12-22 08:35:30,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:30" (1/1) ... [2021-12-22 08:35:30,647 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:30" (1/1) ... [2021-12-22 08:35:30,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:30" (1/1) ... [2021-12-22 08:35:30,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:30" (1/1) ... [2021-12-22 08:35:30,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:30" (1/1) ... [2021-12-22 08:35:30,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 08:35:30,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 08:35:30,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 08:35:30,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 08:35:30,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:30" (1/1) ... [2021-12-22 08:35:30,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:35:30,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:35:30,809 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) [2021-12-22 08:35:30,831 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 [2021-12-22 08:35:30,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-22 08:35:30,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-22 08:35:30,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-22 08:35:30,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 08:35:30,838 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2021-12-22 08:35:30,839 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2021-12-22 08:35:30,839 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfSendToNextDriver [2021-12-22 08:35:30,839 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfSendToNextDriver [2021-12-22 08:35:30,839 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2021-12-22 08:35:30,839 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2021-12-22 08:35:30,839 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfAddCounters [2021-12-22 08:35:30,839 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfAddCounters [2021-12-22 08:35:30,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-22 08:35:30,840 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-22 08:35:30,840 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedDecrement [2021-12-22 08:35:30,840 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedDecrement [2021-12-22 08:35:30,840 INFO L130 BoogieDeclarations]: Found specification of procedure IoWMIRegistrationControl [2021-12-22 08:35:30,840 INFO L138 BoogieDeclarations]: Found implementation of procedure IoWMIRegistrationControl [2021-12-22 08:35:30,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 08:35:30,840 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2021-12-22 08:35:30,840 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2021-12-22 08:35:30,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-22 08:35:30,841 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-22 08:35:30,841 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2021-12-22 08:35:30,841 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2021-12-22 08:35:30,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 08:35:30,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 08:35:30,841 INFO L130 BoogieDeclarations]: Found specification of procedure KeQuerySystemTime [2021-12-22 08:35:30,841 INFO L138 BoogieDeclarations]: Found implementation of procedure KeQuerySystemTime [2021-12-22 08:35:30,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 08:35:30,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 08:35:30,842 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2021-12-22 08:35:30,842 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2021-12-22 08:35:30,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 08:35:30,842 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfIrpCompletion [2021-12-22 08:35:30,842 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfIrpCompletion [2021-12-22 08:35:30,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 08:35:30,843 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfLogError [2021-12-22 08:35:30,843 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfLogError [2021-12-22 08:35:30,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 08:35:30,843 INFO L130 BoogieDeclarations]: Found specification of procedure KeQueryPerformanceCounter [2021-12-22 08:35:30,843 INFO L138 BoogieDeclarations]: Found implementation of procedure KeQueryPerformanceCounter [2021-12-22 08:35:30,843 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedIncrement [2021-12-22 08:35:30,843 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedIncrement [2021-12-22 08:35:30,844 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2021-12-22 08:35:30,844 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2021-12-22 08:35:30,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2021-12-22 08:35:30,844 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2021-12-22 08:35:30,844 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfForwardIrpSynchronous [2021-12-22 08:35:30,844 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfForwardIrpSynchronous [2021-12-22 08:35:30,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 08:35:30,844 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfIoCompletion [2021-12-22 08:35:30,845 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfIoCompletion [2021-12-22 08:35:30,845 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_guard [2021-12-22 08:35:30,846 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_guard [2021-12-22 08:35:30,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-22 08:35:30,846 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2021-12-22 08:35:30,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2021-12-22 08:35:30,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 08:35:30,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 08:35:31,367 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 08:35:31,368 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 08:35:31,496 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:35:31,508 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2021-12-22 08:35:31,509 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2021-12-22 08:35:31,573 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:35:31,588 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2021-12-22 08:35:31,589 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2021-12-22 08:35:31,940 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:35:31,958 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2021-12-22 08:35:31,959 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2021-12-22 08:35:32,053 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:35:32,056 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:35:32,062 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:36:12,201 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##61: assume false; [2021-12-22 08:36:12,202 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##62: assume !false; [2021-12-22 08:36:12,202 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##129: assume !false; [2021-12-22 08:36:12,202 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##128: assume false; [2021-12-22 08:36:12,202 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##35: assume !false; [2021-12-22 08:36:12,202 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##34: assume false; [2021-12-22 08:36:12,215 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 08:36:12,221 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 08:36:12,222 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-22 08:36:12,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:36:12 BoogieIcfgContainer [2021-12-22 08:36:12,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 08:36:12,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 08:36:12,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 08:36:12,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 08:36:12,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:35:29" (1/3) ... [2021-12-22 08:36:12,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d011637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:36:12, skipping insertion in model container [2021-12-22 08:36:12,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:30" (2/3) ... [2021-12-22 08:36:12,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d011637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:36:12, skipping insertion in model container [2021-12-22 08:36:12,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:36:12" (3/3) ... [2021-12-22 08:36:12,231 INFO L111 eAbstractionObserver]: Analyzing ICFG diskperf.i.cil-1.c [2021-12-22 08:36:12,235 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 08:36:12,235 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 08:36:12,272 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 08:36:12,279 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 [2021-12-22 08:36:12,279 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 08:36:12,312 INFO L276 IsEmpty]: Start isEmpty. Operand has 378 states, 274 states have (on average 1.4197080291970803) internal successors, (389), 292 states have internal predecessors, (389), 80 states have call successors, (80), 22 states have call predecessors, (80), 22 states have return successors, (80), 76 states have call predecessors, (80), 80 states have call successors, (80) [2021-12-22 08:36:12,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 08:36:12,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:36:12,317 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:36:12,318 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:36:12,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:36:12,323 INFO L85 PathProgramCache]: Analyzing trace with hash 2013573229, now seen corresponding path program 1 times [2021-12-22 08:36:12,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:36:12,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529019062] [2021-12-22 08:36:12,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:36:12,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:36:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:13,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:36:13,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:36:13,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529019062] [2021-12-22 08:36:13,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529019062] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:36:13,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:36:13,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 08:36:13,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707405837] [2021-12-22 08:36:13,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:36:13,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 08:36:13,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:36:13,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 08:36:13,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 08:36:13,905 INFO L87 Difference]: Start difference. First operand has 378 states, 274 states have (on average 1.4197080291970803) internal successors, (389), 292 states have internal predecessors, (389), 80 states have call successors, (80), 22 states have call predecessors, (80), 22 states have return successors, (80), 76 states have call predecessors, (80), 80 states have call successors, (80) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:36:13,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:36:13,964 INFO L93 Difference]: Finished difference Result 750 states and 1130 transitions. [2021-12-22 08:36:13,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 08:36:13,966 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-22 08:36:13,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:36:13,974 INFO L225 Difference]: With dead ends: 750 [2021-12-22 08:36:13,974 INFO L226 Difference]: Without dead ends: 371 [2021-12-22 08:36:13,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 08:36:13,982 INFO L933 BasicCegarLoop]: 525 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:36:13,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:36:13,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-12-22 08:36:14,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2021-12-22 08:36:14,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 269 states have (on average 1.3605947955390334) internal successors, (366), 285 states have internal predecessors, (366), 80 states have call successors, (80), 22 states have call predecessors, (80), 21 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2021-12-22 08:36:14,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 512 transitions. [2021-12-22 08:36:14,036 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 512 transitions. Word has length 17 [2021-12-22 08:36:14,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:36:14,036 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 512 transitions. [2021-12-22 08:36:14,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:36:14,037 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 512 transitions. [2021-12-22 08:36:14,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-22 08:36:14,037 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:36:14,038 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:36:14,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 08:36:14,038 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:36:14,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:36:14,039 INFO L85 PathProgramCache]: Analyzing trace with hash -6791183, now seen corresponding path program 1 times [2021-12-22 08:36:14,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:36:14,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8345268] [2021-12-22 08:36:14,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:36:14,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:36:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:36:15,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:36:15,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8345268] [2021-12-22 08:36:15,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8345268] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:36:15,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:36:15,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 08:36:15,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515395513] [2021-12-22 08:36:15,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:36:15,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 08:36:15,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:36:15,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 08:36:15,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:36:15,279 INFO L87 Difference]: Start difference. First operand 371 states and 512 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:36:15,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:36:15,392 INFO L93 Difference]: Finished difference Result 744 states and 1027 transitions. [2021-12-22 08:36:15,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 08:36:15,392 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-22 08:36:15,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:36:15,395 INFO L225 Difference]: With dead ends: 744 [2021-12-22 08:36:15,395 INFO L226 Difference]: Without dead ends: 377 [2021-12-22 08:36:15,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:36:15,397 INFO L933 BasicCegarLoop]: 508 mSDtfsCounter, 2 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:36:15,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1516 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:36:15,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-22 08:36:15,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 375. [2021-12-22 08:36:15,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 273 states have (on average 1.3553113553113554) internal successors, (370), 289 states have internal predecessors, (370), 80 states have call successors, (80), 22 states have call predecessors, (80), 21 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2021-12-22 08:36:15,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 516 transitions. [2021-12-22 08:36:15,418 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 516 transitions. Word has length 19 [2021-12-22 08:36:15,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:36:15,418 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 516 transitions. [2021-12-22 08:36:15,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:36:15,419 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 516 transitions. [2021-12-22 08:36:15,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-22 08:36:15,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:36:15,421 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:36:15,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 08:36:15,421 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:36:15,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:36:15,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1840508881, now seen corresponding path program 1 times [2021-12-22 08:36:15,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:36:15,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800152558] [2021-12-22 08:36:15,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:36:15,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:36:17,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:18,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 08:36:18,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:36:18,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800152558] [2021-12-22 08:36:18,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800152558] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:36:18,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:36:18,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:36:18,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078371381] [2021-12-22 08:36:18,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:36:18,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:36:18,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:36:18,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:36:18,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:36:18,110 INFO L87 Difference]: Start difference. First operand 375 states and 516 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:36:18,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:36:18,262 INFO L93 Difference]: Finished difference Result 395 states and 542 transitions. [2021-12-22 08:36:18,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:36:18,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-22 08:36:18,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:36:18,265 INFO L225 Difference]: With dead ends: 395 [2021-12-22 08:36:18,265 INFO L226 Difference]: Without dead ends: 375 [2021-12-22 08:36:18,265 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 [2021-12-22 08:36:18,266 INFO L933 BasicCegarLoop]: 510 mSDtfsCounter, 12 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:36:18,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 965 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:36:18,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-12-22 08:36:18,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 375. [2021-12-22 08:36:18,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 273 states have (on average 1.3516483516483517) internal successors, (369), 289 states have internal predecessors, (369), 80 states have call successors, (80), 22 states have call predecessors, (80), 21 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2021-12-22 08:36:18,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 515 transitions. [2021-12-22 08:36:18,283 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 515 transitions. Word has length 23 [2021-12-22 08:36:18,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:36:18,283 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 515 transitions. [2021-12-22 08:36:18,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:36:18,284 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 515 transitions. [2021-12-22 08:36:18,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 08:36:18,285 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:36:18,285 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:36:18,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 08:36:18,286 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:36:18,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:36:18,286 INFO L85 PathProgramCache]: Analyzing trace with hash 2125296181, now seen corresponding path program 1 times [2021-12-22 08:36:18,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:36:18,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174302958] [2021-12-22 08:36:18,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:36:18,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:36:20,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:20,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 08:36:20,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:36:20,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174302958] [2021-12-22 08:36:20,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174302958] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:36:20,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:36:20,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:36:20,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424346169] [2021-12-22 08:36:20,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:36:20,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:36:20,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:36:20,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:36:20,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:36:20,767 INFO L87 Difference]: Start difference. First operand 375 states and 515 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:36:22,844 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:23,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:36:23,176 INFO L93 Difference]: Finished difference Result 869 states and 1216 transitions. [2021-12-22 08:36:23,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:36:23,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-22 08:36:23,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:36:23,180 INFO L225 Difference]: With dead ends: 869 [2021-12-22 08:36:23,181 INFO L226 Difference]: Without dead ends: 614 [2021-12-22 08:36:23,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:36:23,183 INFO L933 BasicCegarLoop]: 715 mSDtfsCounter, 431 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-22 08:36:23,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 1066 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 75 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-12-22 08:36:23,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-12-22 08:36:23,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 594. [2021-12-22 08:36:23,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 435 states have (on average 1.335632183908046) internal successors, (581), 445 states have internal predecessors, (581), 120 states have call successors, (120), 39 states have call predecessors, (120), 38 states have return successors, (129), 113 states have call predecessors, (129), 109 states have call successors, (129) [2021-12-22 08:36:23,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 830 transitions. [2021-12-22 08:36:23,209 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 830 transitions. Word has length 25 [2021-12-22 08:36:23,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:36:23,209 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 830 transitions. [2021-12-22 08:36:23,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:36:23,210 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 830 transitions. [2021-12-22 08:36:23,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-22 08:36:23,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:36:23,212 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 08:36:23,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 08:36:23,212 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:36:23,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:36:23,212 INFO L85 PathProgramCache]: Analyzing trace with hash -642930051, now seen corresponding path program 1 times [2021-12-22 08:36:23,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:36:23,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589275814] [2021-12-22 08:36:23,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:36:23,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:36:25,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:25,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 08:36:25,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:36:25,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589275814] [2021-12-22 08:36:25,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589275814] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:36:25,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:36:25,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:36:25,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884771665] [2021-12-22 08:36:25,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:36:25,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:36:25,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:36:25,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:36:25,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:36:25,625 INFO L87 Difference]: Start difference. First operand 594 states and 830 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:36:25,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:36:25,747 INFO L93 Difference]: Finished difference Result 1408 states and 2008 transitions. [2021-12-22 08:36:25,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:36:25,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-22 08:36:25,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:36:25,756 INFO L225 Difference]: With dead ends: 1408 [2021-12-22 08:36:25,757 INFO L226 Difference]: Without dead ends: 945 [2021-12-22 08:36:25,759 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 [2021-12-22 08:36:25,766 INFO L933 BasicCegarLoop]: 579 mSDtfsCounter, 421 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:36:25,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 919 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:36:25,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-12-22 08:36:25,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 915. [2021-12-22 08:36:25,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 663 states have (on average 1.3423831070889893) internal successors, (890), 674 states have internal predecessors, (890), 189 states have call successors, (189), 62 states have call predecessors, (189), 62 states have return successors, (223), 183 states have call predecessors, (223), 179 states have call successors, (223) [2021-12-22 08:36:25,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1302 transitions. [2021-12-22 08:36:25,818 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1302 transitions. Word has length 33 [2021-12-22 08:36:25,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:36:25,819 INFO L470 AbstractCegarLoop]: Abstraction has 915 states and 1302 transitions. [2021-12-22 08:36:25,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:36:25,819 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1302 transitions. [2021-12-22 08:36:25,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-22 08:36:25,824 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:36:25,824 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 08:36:25,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 08:36:25,825 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:36:25,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:36:25,826 INFO L85 PathProgramCache]: Analyzing trace with hash 401969732, now seen corresponding path program 1 times [2021-12-22 08:36:25,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:36:25,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14078818] [2021-12-22 08:36:25,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:36:25,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:36:27,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:28,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 08:36:28,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:36:28,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14078818] [2021-12-22 08:36:28,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14078818] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:36:28,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:36:28,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:36:28,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237634675] [2021-12-22 08:36:28,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:36:28,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:36:28,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:36:28,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:36:28,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:36:28,139 INFO L87 Difference]: Start difference. First operand 915 states and 1302 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:36:30,212 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:30,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:36:30,360 INFO L93 Difference]: Finished difference Result 929 states and 1321 transitions. [2021-12-22 08:36:30,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:36:30,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-22 08:36:30,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:36:30,364 INFO L225 Difference]: With dead ends: 929 [2021-12-22 08:36:30,365 INFO L226 Difference]: Without dead ends: 925 [2021-12-22 08:36:30,365 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 [2021-12-22 08:36:30,366 INFO L933 BasicCegarLoop]: 486 mSDtfsCounter, 28 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-22 08:36:30,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 909 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-22 08:36:30,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-12-22 08:36:30,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 924. [2021-12-22 08:36:30,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 673 states have (on average 1.3417533432392272) internal successors, (903), 682 states have internal predecessors, (903), 188 states have call successors, (188), 63 states have call predecessors, (188), 62 states have return successors, (223), 183 states have call predecessors, (223), 179 states have call successors, (223) [2021-12-22 08:36:30,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1314 transitions. [2021-12-22 08:36:30,387 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1314 transitions. Word has length 33 [2021-12-22 08:36:30,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:36:30,388 INFO L470 AbstractCegarLoop]: Abstraction has 924 states and 1314 transitions. [2021-12-22 08:36:30,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:36:30,388 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1314 transitions. [2021-12-22 08:36:30,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-22 08:36:30,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:36:30,389 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 08:36:30,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 08:36:30,389 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:36:30,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:36:30,390 INFO L85 PathProgramCache]: Analyzing trace with hash 937185154, now seen corresponding path program 1 times [2021-12-22 08:36:30,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:36:30,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772507972] [2021-12-22 08:36:30,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:36:30,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:36:32,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:32,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 08:36:32,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:32,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 08:36:32,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:36:32,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772507972] [2021-12-22 08:36:32,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772507972] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:36:32,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:36:32,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 08:36:32,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192510319] [2021-12-22 08:36:32,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:36:32,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 08:36:32,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:36:32,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 08:36:32,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 08:36:32,796 INFO L87 Difference]: Start difference. First operand 924 states and 1314 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)