./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 574ddb4e 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-?-574ddb4 [2023-02-17 05:49:05,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 05:49:05,545 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 05:49:05,571 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 05:49:05,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 05:49:05,575 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 05:49:05,576 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 05:49:05,578 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 05:49:05,580 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 05:49:05,584 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 05:49:05,585 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 05:49:05,586 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 05:49:05,587 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 05:49:05,588 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 05:49:05,590 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 05:49:05,590 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 05:49:05,591 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 05:49:05,592 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 05:49:05,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 05:49:05,597 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 05:49:05,598 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 05:49:05,599 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 05:49:05,600 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 05:49:05,601 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 05:49:05,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 05:49:05,603 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 05:49:05,603 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 05:49:05,604 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 05:49:05,605 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 05:49:05,605 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 05:49:05,606 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 05:49:05,606 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 05:49:05,607 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 05:49:05,608 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 05:49:05,608 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 05:49:05,609 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 05:49:05,609 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 05:49:05,609 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 05:49:05,609 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 05:49:05,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 05:49:05,611 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 05:49:05,611 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 05:49:05,639 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 05:49:05,639 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 05:49:05,639 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 05:49:05,639 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 05:49:05,640 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 05:49:05,640 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 05:49:05,641 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 05:49:05,641 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 05:49:05,641 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 05:49:05,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 05:49:05,642 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 05:49:05,642 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 05:49:05,642 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 05:49:05,642 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 05:49:05,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 05:49:05,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 05:49:05,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 05:49:05,643 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 05:49:05,643 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 05:49:05,643 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 05:49:05,643 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 05:49:05,643 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 05:49:05,643 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 05:49:05,643 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 05:49:05,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 05:49:05,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 05:49:05,644 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 05:49:05,644 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 05:49:05,644 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 05:49:05,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 05:49:05,644 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 05:49:05,645 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 05:49:05,645 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 05:49:05,645 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 05:49:05,645 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 05:49:05,645 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0996d70f204c5713a65b04e25037e48d7532ec1ba0c10162e12c5c0d518b4e3 [2023-02-17 05:49:05,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 05:49:05,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 05:49:05,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 05:49:05,862 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 05:49:05,862 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 05:49:05,863 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/diskperf.i.cil-1.c [2023-02-17 05:49:06,926 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 05:49:07,213 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 05:49:07,214 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/diskperf.i.cil-1.c [2023-02-17 05:49:07,237 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16f52eeb4/e2edec2f2cc94bfd90dafd13f74b8128/FLAGc99377fae [2023-02-17 05:49:07,249 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16f52eeb4/e2edec2f2cc94bfd90dafd13f74b8128 [2023-02-17 05:49:07,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 05:49:07,252 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 05:49:07,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 05:49:07,253 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 05:49:07,255 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 05:49:07,256 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 05:49:07" (1/1) ... [2023-02-17 05:49:07,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2321ef1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:49:07, skipping insertion in model container [2023-02-17 05:49:07,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 05:49:07" (1/1) ... [2023-02-17 05:49:07,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 05:49:07,323 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 05:49:07,755 WARN L237 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] [2023-02-17 05:49:07,862 WARN L623 FunctionHandler]: Unknown extern function swprintf [2023-02-17 05:49:07,956 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 05:49:08,022 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 05:49:08,077 WARN L237 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] [2023-02-17 05:49:08,130 WARN L623 FunctionHandler]: Unknown extern function swprintf [2023-02-17 05:49:08,187 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 05:49:08,249 INFO L208 MainTranslator]: Completed translation [2023-02-17 05:49:08,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:49:08 WrapperNode [2023-02-17 05:49:08,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 05:49:08,251 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 05:49:08,251 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 05:49:08,251 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 05:49:08,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:49:08" (1/1) ... [2023-02-17 05:49:08,315 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:49:08" (1/1) ... [2023-02-17 05:49:08,380 INFO L138 Inliner]: procedures = 127, calls = 1459, calls flagged for inlining = 20, calls inlined = 18, statements flattened = 3749 [2023-02-17 05:49:08,380 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 05:49:08,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 05:49:08,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 05:49:08,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 05:49:08,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:49:08" (1/1) ... [2023-02-17 05:49:08,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:49:08" (1/1) ... [2023-02-17 05:49:08,408 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:49:08" (1/1) ... [2023-02-17 05:49:08,409 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:49:08" (1/1) ... [2023-02-17 05:49:08,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:49:08" (1/1) ... [2023-02-17 05:49:08,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:49:08" (1/1) ... [2023-02-17 05:49:08,535 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:49:08" (1/1) ... [2023-02-17 05:49:08,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:49:08" (1/1) ... [2023-02-17 05:49:08,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 05:49:08,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 05:49:08,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 05:49:08,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 05:49:08,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:49:08" (1/1) ... [2023-02-17 05:49:08,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 05:49:08,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:49:08,599 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) [2023-02-17 05:49:08,658 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 [2023-02-17 05:49:08,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-02-17 05:49:08,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-02-17 05:49:08,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-02-17 05:49:08,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 05:49:08,672 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2023-02-17 05:49:08,672 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2023-02-17 05:49:08,672 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfSendToNextDriver [2023-02-17 05:49:08,672 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfSendToNextDriver [2023-02-17 05:49:08,672 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2023-02-17 05:49:08,672 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2023-02-17 05:49:08,672 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfAddCounters [2023-02-17 05:49:08,673 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfAddCounters [2023-02-17 05:49:08,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-02-17 05:49:08,673 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-02-17 05:49:08,673 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedDecrement [2023-02-17 05:49:08,673 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedDecrement [2023-02-17 05:49:08,673 INFO L130 BoogieDeclarations]: Found specification of procedure IoWMIRegistrationControl [2023-02-17 05:49:08,673 INFO L138 BoogieDeclarations]: Found implementation of procedure IoWMIRegistrationControl [2023-02-17 05:49:08,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 05:49:08,673 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2023-02-17 05:49:08,674 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2023-02-17 05:49:08,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-02-17 05:49:08,674 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-02-17 05:49:08,674 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2023-02-17 05:49:08,674 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2023-02-17 05:49:08,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 05:49:08,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 05:49:08,675 INFO L130 BoogieDeclarations]: Found specification of procedure KeQuerySystemTime [2023-02-17 05:49:08,675 INFO L138 BoogieDeclarations]: Found implementation of procedure KeQuerySystemTime [2023-02-17 05:49:08,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-17 05:49:08,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-17 05:49:08,676 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2023-02-17 05:49:08,676 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2023-02-17 05:49:08,676 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-17 05:49:08,676 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfIrpCompletion [2023-02-17 05:49:08,676 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfIrpCompletion [2023-02-17 05:49:08,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 05:49:08,677 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfLogError [2023-02-17 05:49:08,677 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfLogError [2023-02-17 05:49:08,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-17 05:49:08,677 INFO L130 BoogieDeclarations]: Found specification of procedure KeQueryPerformanceCounter [2023-02-17 05:49:08,677 INFO L138 BoogieDeclarations]: Found implementation of procedure KeQueryPerformanceCounter [2023-02-17 05:49:08,677 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedIncrement [2023-02-17 05:49:08,678 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedIncrement [2023-02-17 05:49:08,678 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2023-02-17 05:49:08,678 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2023-02-17 05:49:08,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2023-02-17 05:49:08,678 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2023-02-17 05:49:08,678 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfForwardIrpSynchronous [2023-02-17 05:49:08,678 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfForwardIrpSynchronous [2023-02-17 05:49:08,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 05:49:08,679 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfIoCompletion [2023-02-17 05:49:08,679 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfIoCompletion [2023-02-17 05:49:08,679 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_guard [2023-02-17 05:49:08,679 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_guard [2023-02-17 05:49:08,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-02-17 05:49:08,680 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2023-02-17 05:49:08,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2023-02-17 05:49:08,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 05:49:08,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 05:49:09,221 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 05:49:09,223 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 05:49:09,382 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-17 05:49:09,403 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2023-02-17 05:49:09,403 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2023-02-17 05:49:09,471 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-17 05:49:09,489 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-02-17 05:49:09,490 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-02-17 05:49:09,747 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-17 05:49:09,763 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2023-02-17 05:49:09,763 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2023-02-17 05:49:09,871 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-17 05:49:09,874 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-17 05:49:09,879 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-17 05:49:44,431 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##61: assume false; [2023-02-17 05:49:44,432 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##62: assume !false; [2023-02-17 05:49:44,432 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##129: assume !false; [2023-02-17 05:49:44,432 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##128: assume false; [2023-02-17 05:49:44,432 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##35: assume !false; [2023-02-17 05:49:44,432 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##34: assume false; [2023-02-17 05:49:44,446 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 05:49:44,458 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 05:49:44,458 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-17 05:49:44,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 05:49:44 BoogieIcfgContainer [2023-02-17 05:49:44,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 05:49:44,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 05:49:44,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 05:49:44,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 05:49:44,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 05:49:07" (1/3) ... [2023-02-17 05:49:44,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ba38947 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 05:49:44, skipping insertion in model container [2023-02-17 05:49:44,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:49:08" (2/3) ... [2023-02-17 05:49:44,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ba38947 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 05:49:44, skipping insertion in model container [2023-02-17 05:49:44,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 05:49:44" (3/3) ... [2023-02-17 05:49:44,467 INFO L112 eAbstractionObserver]: Analyzing ICFG diskperf.i.cil-1.c [2023-02-17 05:49:44,481 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 05:49:44,481 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 05:49:44,541 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 05:49:44,547 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3337c970, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 05:49:44,548 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 05:49:44,554 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) [2023-02-17 05:49:44,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-17 05:49:44,560 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:49:44,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:49:44,565 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:49:44,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:49:44,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2013573229, now seen corresponding path program 1 times [2023-02-17 05:49:44,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:49:44,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093400599] [2023-02-17 05:49:44,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:49:44,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:49:45,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:49:45,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 05:49:45,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:49:45,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093400599] [2023-02-17 05:49:45,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093400599] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:49:45,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 05:49:45,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 05:49:45,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223654609] [2023-02-17 05:49:45,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:49:45,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 05:49:45,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:49:45,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 05:49:45,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 05:49:45,777 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) [2023-02-17 05:49:45,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:49:45,839 INFO L93 Difference]: Finished difference Result 750 states and 1130 transitions. [2023-02-17 05:49:45,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 05:49:45,841 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 [2023-02-17 05:49:45,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:49:45,854 INFO L225 Difference]: With dead ends: 750 [2023-02-17 05:49:45,854 INFO L226 Difference]: Without dead ends: 371 [2023-02-17 05:49:45,860 INFO L412 NwaCegarLoop]: 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 [2023-02-17 05:49:45,863 INFO L413 NwaCegarLoop]: 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 [2023-02-17 05:49:45,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 05:49:45,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2023-02-17 05:49:45,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2023-02-17 05:49:45,927 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) [2023-02-17 05:49:45,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 512 transitions. [2023-02-17 05:49:45,932 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 512 transitions. Word has length 17 [2023-02-17 05:49:45,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:49:45,933 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 512 transitions. [2023-02-17 05:49:45,933 INFO L496 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) [2023-02-17 05:49:45,933 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 512 transitions. [2023-02-17 05:49:45,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-17 05:49:45,934 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:49:45,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:49:45,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 05:49:45,935 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:49:45,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:49:45,935 INFO L85 PathProgramCache]: Analyzing trace with hash -6791183, now seen corresponding path program 1 times [2023-02-17 05:49:45,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:49:45,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576442617] [2023-02-17 05:49:45,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:49:45,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:49:46,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:49:48,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 05:49:48,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:49:48,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576442617] [2023-02-17 05:49:48,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576442617] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:49:48,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 05:49:48,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 05:49:48,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627622593] [2023-02-17 05:49:48,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:49:48,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 05:49:48,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:49:48,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 05:49:48,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 05:49:48,014 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) [2023-02-17 05:49:48,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:49:48,134 INFO L93 Difference]: Finished difference Result 744 states and 1027 transitions. [2023-02-17 05:49:48,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 05:49:48,134 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 [2023-02-17 05:49:48,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:49:48,137 INFO L225 Difference]: With dead ends: 744 [2023-02-17 05:49:48,137 INFO L226 Difference]: Without dead ends: 377 [2023-02-17 05:49:48,141 INFO L412 NwaCegarLoop]: 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 [2023-02-17 05:49:48,143 INFO L413 NwaCegarLoop]: 508 mSDtfsCounter, 2 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 05:49:48,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1516 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 05:49:48,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2023-02-17 05:49:48,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 375. [2023-02-17 05:49:48,163 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) [2023-02-17 05:49:48,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 516 transitions. [2023-02-17 05:49:48,164 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 516 transitions. Word has length 19 [2023-02-17 05:49:48,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:49:48,165 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 516 transitions. [2023-02-17 05:49:48,165 INFO L496 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) [2023-02-17 05:49:48,165 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 516 transitions. [2023-02-17 05:49:48,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-17 05:49:48,166 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:49:48,166 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:49:48,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 05:49:48,166 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:49:48,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:49:48,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1840508881, now seen corresponding path program 1 times [2023-02-17 05:49:48,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:49:48,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643807820] [2023-02-17 05:49:48,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:49:48,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:49:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:49:50,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 05:49:50,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:49:50,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643807820] [2023-02-17 05:49:50,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643807820] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:49:50,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 05:49:50,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 05:49:50,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667680097] [2023-02-17 05:49:50,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:49:50,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 05:49:50,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:49:50,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 05:49:50,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 05:49:50,072 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) [2023-02-17 05:49:50,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:49:50,216 INFO L93 Difference]: Finished difference Result 395 states and 542 transitions. [2023-02-17 05:49:50,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 05:49:50,216 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 [2023-02-17 05:49:50,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:49:50,218 INFO L225 Difference]: With dead ends: 395 [2023-02-17 05:49:50,218 INFO L226 Difference]: Without dead ends: 375 [2023-02-17 05:49:50,219 INFO L412 NwaCegarLoop]: 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 [2023-02-17 05:49:50,219 INFO L413 NwaCegarLoop]: 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 [2023-02-17 05:49:50,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 965 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 05:49:50,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2023-02-17 05:49:50,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 375. [2023-02-17 05:49:50,228 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) [2023-02-17 05:49:50,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 515 transitions. [2023-02-17 05:49:50,230 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 515 transitions. Word has length 23 [2023-02-17 05:49:50,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:49:50,230 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 515 transitions. [2023-02-17 05:49:50,230 INFO L496 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) [2023-02-17 05:49:50,230 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 515 transitions. [2023-02-17 05:49:50,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-17 05:49:50,231 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:49:50,231 INFO L195 NwaCegarLoop]: 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] [2023-02-17 05:49:50,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 05:49:50,232 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:49:50,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:49:50,232 INFO L85 PathProgramCache]: Analyzing trace with hash 2125296181, now seen corresponding path program 1 times [2023-02-17 05:49:50,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:49:50,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452901783] [2023-02-17 05:49:50,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:49:50,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:49:51,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:49:52,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 05:49:52,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:49:52,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452901783] [2023-02-17 05:49:52,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452901783] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:49:52,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 05:49:52,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 05:49:52,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896683187] [2023-02-17 05:49:52,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:49:52,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 05:49:52,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:49:52,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 05:49:52,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 05:49:52,474 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) [2023-02-17 05:49:54,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:49:54,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:49:54,763 INFO L93 Difference]: Finished difference Result 869 states and 1216 transitions. [2023-02-17 05:49:54,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 05:49:54,764 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 [2023-02-17 05:49:54,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:49:54,768 INFO L225 Difference]: With dead ends: 869 [2023-02-17 05:49:54,768 INFO L226 Difference]: Without dead ends: 614 [2023-02-17 05:49:54,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 05:49:54,769 INFO L413 NwaCegarLoop]: 715 mSDtfsCounter, 431 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s 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, 2.3s IncrementalHoareTripleChecker+Time [2023-02-17 05:49:54,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 1066 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 75 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2023-02-17 05:49:54,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2023-02-17 05:49:54,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 594. [2023-02-17 05:49:54,791 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) [2023-02-17 05:49:54,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 830 transitions. [2023-02-17 05:49:54,794 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 830 transitions. Word has length 25 [2023-02-17 05:49:54,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:49:54,794 INFO L495 AbstractCegarLoop]: Abstraction has 594 states and 830 transitions. [2023-02-17 05:49:54,794 INFO L496 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) [2023-02-17 05:49:54,795 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 830 transitions. [2023-02-17 05:49:54,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-17 05:49:54,799 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:49:54,800 INFO L195 NwaCegarLoop]: 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] [2023-02-17 05:49:54,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 05:49:54,800 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:49:54,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:49:54,800 INFO L85 PathProgramCache]: Analyzing trace with hash -642930051, now seen corresponding path program 1 times [2023-02-17 05:49:54,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:49:54,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530361973] [2023-02-17 05:49:54,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:49:54,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:49:55,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:49:56,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 05:49:56,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:49:56,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530361973] [2023-02-17 05:49:56,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530361973] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:49:56,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 05:49:56,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 05:49:56,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805783218] [2023-02-17 05:49:56,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:49:56,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 05:49:56,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:49:56,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 05:49:56,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 05:49:56,741 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) [2023-02-17 05:49:56,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:49:56,885 INFO L93 Difference]: Finished difference Result 1408 states and 2008 transitions. [2023-02-17 05:49:56,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 05:49:56,885 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 [2023-02-17 05:49:56,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:49:56,891 INFO L225 Difference]: With dead ends: 1408 [2023-02-17 05:49:56,891 INFO L226 Difference]: Without dead ends: 945 [2023-02-17 05:49:56,893 INFO L412 NwaCegarLoop]: 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 [2023-02-17 05:49:56,894 INFO L413 NwaCegarLoop]: 584 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, 924 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 [2023-02-17 05:49:56,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 924 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 05:49:56,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2023-02-17 05:49:56,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 915. [2023-02-17 05:49:56,925 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) [2023-02-17 05:49:56,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1302 transitions. [2023-02-17 05:49:56,933 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1302 transitions. Word has length 33 [2023-02-17 05:49:56,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:49:56,933 INFO L495 AbstractCegarLoop]: Abstraction has 915 states and 1302 transitions. [2023-02-17 05:49:56,934 INFO L496 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) [2023-02-17 05:49:56,934 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1302 transitions. [2023-02-17 05:49:56,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-17 05:49:56,935 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:49:56,935 INFO L195 NwaCegarLoop]: 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] [2023-02-17 05:49:56,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 05:49:56,935 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:49:56,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:49:56,936 INFO L85 PathProgramCache]: Analyzing trace with hash 401969732, now seen corresponding path program 1 times [2023-02-17 05:49:56,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:49:56,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434378261] [2023-02-17 05:49:56,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:49:56,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:49:57,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:49:58,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 05:49:58,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:49:58,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434378261] [2023-02-17 05:49:58,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434378261] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:49:58,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 05:49:58,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 05:49:58,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254454708] [2023-02-17 05:49:58,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:49:58,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 05:49:58,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:49:58,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 05:49:58,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 05:49:58,484 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) [2023-02-17 05:50:00,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:50:00,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:50:00,893 INFO L93 Difference]: Finished difference Result 929 states and 1321 transitions. [2023-02-17 05:50:00,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 05:50:00,894 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 [2023-02-17 05:50:00,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:50:00,897 INFO L225 Difference]: With dead ends: 929 [2023-02-17 05:50:00,897 INFO L226 Difference]: Without dead ends: 925 [2023-02-17 05:50:00,898 INFO L412 NwaCegarLoop]: 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 [2023-02-17 05:50:00,898 INFO L413 NwaCegarLoop]: 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, 2.4s IncrementalHoareTripleChecker+Time [2023-02-17 05:50:00,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 909 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2023-02-17 05:50:00,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2023-02-17 05:50:00,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 924. [2023-02-17 05:50:00,921 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) [2023-02-17 05:50:00,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1314 transitions. [2023-02-17 05:50:00,925 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1314 transitions. Word has length 33 [2023-02-17 05:50:00,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:50:00,925 INFO L495 AbstractCegarLoop]: Abstraction has 924 states and 1314 transitions. [2023-02-17 05:50:00,925 INFO L496 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) [2023-02-17 05:50:00,926 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1314 transitions. [2023-02-17 05:50:00,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-17 05:50:00,926 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:50:00,927 INFO L195 NwaCegarLoop]: 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] [2023-02-17 05:50:00,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-17 05:50:00,927 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:50:00,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:50:00,927 INFO L85 PathProgramCache]: Analyzing trace with hash 937185154, now seen corresponding path program 1 times [2023-02-17 05:50:00,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:50:00,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130030409] [2023-02-17 05:50:00,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:50:00,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:50:02,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:50:03,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 05:50:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:50:03,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 05:50:03,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:50:03,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130030409] [2023-02-17 05:50:03,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130030409] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:50:03,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 05:50:03,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 05:50:03,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982221519] [2023-02-17 05:50:03,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:50:03,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 05:50:03,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:50:03,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 05:50:03,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 05:50:03,334 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) [2023-02-17 05:50:05,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:50:07,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:50:10,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:50:10,898 INFO L93 Difference]: Finished difference Result 981 states and 1395 transitions. [2023-02-17 05:50:10,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 05:50:10,898 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 37 [2023-02-17 05:50:10,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:50:10,903 INFO L225 Difference]: With dead ends: 981 [2023-02-17 05:50:10,903 INFO L226 Difference]: Without dead ends: 970 [2023-02-17 05:50:10,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-17 05:50:10,904 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 653 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 133 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2023-02-17 05:50:10,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [690 Valid, 980 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 769 Invalid, 2 Unknown, 0 Unchecked, 7.4s Time] [2023-02-17 05:50:10,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2023-02-17 05:50:10,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 948. [2023-02-17 05:50:10,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 695 states have (on average 1.3410071942446042) internal successors, (932), 706 states have internal predecessors, (932), 188 states have call successors, (188), 63 states have call predecessors, (188), 64 states have return successors, (232), 183 states have call predecessors, (232), 179 states have call successors, (232) [2023-02-17 05:50:10,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1352 transitions. [2023-02-17 05:50:10,938 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1352 transitions. Word has length 37 [2023-02-17 05:50:10,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:50:10,939 INFO L495 AbstractCegarLoop]: Abstraction has 948 states and 1352 transitions. [2023-02-17 05:50:10,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-02-17 05:50:10,939 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1352 transitions. [2023-02-17 05:50:10,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-17 05:50:10,940 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:50:10,940 INFO L195 NwaCegarLoop]: 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, 1] [2023-02-17 05:50:10,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-17 05:50:10,940 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:50:10,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:50:10,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1448171803, now seen corresponding path program 1 times [2023-02-17 05:50:10,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:50:10,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790781039] [2023-02-17 05:50:10,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:50:10,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:50:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:50:13,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 05:50:13,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:50:13,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 05:50:13,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:50:13,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790781039] [2023-02-17 05:50:13,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790781039] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:50:13,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 05:50:13,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 05:50:13,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181602473] [2023-02-17 05:50:13,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:50:13,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 05:50:13,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:50:13,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 05:50:13,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 05:50:13,218 INFO L87 Difference]: Start difference. First operand 948 states and 1352 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 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) [2023-02-17 05:50:15,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:50:17,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:50:20,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:50:20,873 INFO L93 Difference]: Finished difference Result 972 states and 1380 transitions. [2023-02-17 05:50:20,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 05:50:20,874 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 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) Word has length 38 [2023-02-17 05:50:20,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:50:20,877 INFO L225 Difference]: With dead ends: 972 [2023-02-17 05:50:20,877 INFO L226 Difference]: Without dead ends: 964 [2023-02-17 05:50:20,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-17 05:50:20,878 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 642 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 129 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-02-17 05:50:20,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [679 Valid, 974 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 765 Invalid, 2 Unknown, 0 Unchecked, 7.5s Time] [2023-02-17 05:50:20,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2023-02-17 05:50:20,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 948. [2023-02-17 05:50:20,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 695 states have (on average 1.339568345323741) internal successors, (931), 706 states have internal predecessors, (931), 188 states have call successors, (188), 63 states have call predecessors, (188), 64 states have return successors, (232), 183 states have call predecessors, (232), 179 states have call successors, (232) [2023-02-17 05:50:20,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1351 transitions. [2023-02-17 05:50:20,916 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1351 transitions. Word has length 38 [2023-02-17 05:50:20,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:50:20,916 INFO L495 AbstractCegarLoop]: Abstraction has 948 states and 1351 transitions. [2023-02-17 05:50:20,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 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) [2023-02-17 05:50:20,917 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1351 transitions. [2023-02-17 05:50:20,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-17 05:50:20,918 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:50:20,918 INFO L195 NwaCegarLoop]: 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, 1, 1] [2023-02-17 05:50:20,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-17 05:50:20,918 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:50:20,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:50:20,919 INFO L85 PathProgramCache]: Analyzing trace with hash 2084178201, now seen corresponding path program 1 times [2023-02-17 05:50:20,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:50:20,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333584008] [2023-02-17 05:50:20,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:50:20,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:50:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:50:22,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 05:50:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:50:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 05:50:22,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:50:22,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333584008] [2023-02-17 05:50:22,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333584008] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:50:22,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 05:50:22,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 05:50:22,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455510565] [2023-02-17 05:50:22,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:50:22,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 05:50:22,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:50:22,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 05:50:22,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 05:50:22,748 INFO L87 Difference]: Start difference. First operand 948 states and 1351 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 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) [2023-02-17 05:50:24,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:50:26,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:50:26,674 INFO L93 Difference]: Finished difference Result 1745 states and 2521 transitions. [2023-02-17 05:50:26,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 05:50:26,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 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) Word has length 39 [2023-02-17 05:50:26,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:50:26,682 INFO L225 Difference]: With dead ends: 1745 [2023-02-17 05:50:26,682 INFO L226 Difference]: Without dead ends: 1716 [2023-02-17 05:50:26,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 05:50:26,683 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 686 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 126 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-02-17 05:50:26,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 981 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 401 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2023-02-17 05:50:26,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2023-02-17 05:50:26,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1677. [2023-02-17 05:50:26,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1218 states have (on average 1.348111658456486) internal successors, (1642), 1233 states have internal predecessors, (1642), 338 states have call successors, (338), 119 states have call predecessors, (338), 120 states have return successors, (446), 334 states have call predecessors, (446), 329 states have call successors, (446) [2023-02-17 05:50:26,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 2426 transitions. [2023-02-17 05:50:26,747 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 2426 transitions. Word has length 39 [2023-02-17 05:50:26,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:50:26,747 INFO L495 AbstractCegarLoop]: Abstraction has 1677 states and 2426 transitions. [2023-02-17 05:50:26,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 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) [2023-02-17 05:50:26,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 2426 transitions. [2023-02-17 05:50:26,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-17 05:50:26,748 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:50:26,748 INFO L195 NwaCegarLoop]: 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, 1, 1, 1] [2023-02-17 05:50:26,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-17 05:50:26,749 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:50:26,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:50:26,749 INFO L85 PathProgramCache]: Analyzing trace with hash 193456973, now seen corresponding path program 1 times [2023-02-17 05:50:26,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:50:26,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027543246] [2023-02-17 05:50:26,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:50:26,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:50:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:50:28,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 05:50:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:50:28,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 05:50:28,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:50:28,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027543246] [2023-02-17 05:50:28,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027543246] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:50:28,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 05:50:28,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 05:50:28,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885748337] [2023-02-17 05:50:28,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:50:28,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 05:50:28,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:50:28,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 05:50:28,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 05:50:28,989 INFO L87 Difference]: Start difference. First operand 1677 states and 2426 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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) [2023-02-17 05:50:31,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:50:33,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:50:35,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:50:35,777 INFO L93 Difference]: Finished difference Result 1710 states and 2471 transitions. [2023-02-17 05:50:35,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 05:50:35,778 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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) Word has length 40 [2023-02-17 05:50:35,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:50:35,785 INFO L225 Difference]: With dead ends: 1710 [2023-02-17 05:50:35,785 INFO L226 Difference]: Without dead ends: 1692 [2023-02-17 05:50:35,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 05:50:35,787 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 158 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 65 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-02-17 05:50:35,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 1235 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 541 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2023-02-17 05:50:35,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2023-02-17 05:50:35,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1673. [2023-02-17 05:50:35,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1215 states have (on average 1.348148148148148) internal successors, (1638), 1230 states have internal predecessors, (1638), 337 states have call successors, (337), 119 states have call predecessors, (337), 120 states have return successors, (445), 333 states have call predecessors, (445), 328 states have call successors, (445) [2023-02-17 05:50:35,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 2420 transitions. [2023-02-17 05:50:35,873 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 2420 transitions. Word has length 40 [2023-02-17 05:50:35,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:50:35,873 INFO L495 AbstractCegarLoop]: Abstraction has 1673 states and 2420 transitions. [2023-02-17 05:50:35,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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) [2023-02-17 05:50:35,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 2420 transitions. [2023-02-17 05:50:35,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-17 05:50:35,875 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:50:35,875 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1] [2023-02-17 05:50:35,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-17 05:50:35,875 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:50:35,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:50:35,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1037165454, now seen corresponding path program 1 times [2023-02-17 05:50:35,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:50:35,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776808460] [2023-02-17 05:50:35,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:50:35,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:50:37,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:50:37,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-17 05:50:37,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:50:37,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 05:50:37,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:50:37,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776808460] [2023-02-17 05:50:37,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776808460] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:50:37,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 05:50:37,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 05:50:37,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997205346] [2023-02-17 05:50:37,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:50:37,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 05:50:37,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:50:37,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 05:50:37,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 05:50:37,760 INFO L87 Difference]: Start difference. First operand 1673 states and 2420 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 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) [2023-02-17 05:50:39,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:50:41,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:50:43,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:50:47,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-02-17 05:50:49,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:50:49,621 INFO L93 Difference]: Finished difference Result 2633 states and 4035 transitions. [2023-02-17 05:50:49,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 05:50:49,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 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) Word has length 43 [2023-02-17 05:50:49,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:50:49,635 INFO L225 Difference]: With dead ends: 2633 [2023-02-17 05:50:49,635 INFO L226 Difference]: Without dead ends: 2625 [2023-02-17 05:50:49,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 05:50:49,638 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 437 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 126 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2023-02-17 05:50:49,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 1027 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 688 Invalid, 4 Unknown, 0 Unchecked, 11.7s Time] [2023-02-17 05:50:49,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2023-02-17 05:50:49,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 1815. [2023-02-17 05:50:49,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1815 states, 1317 states have (on average 1.3500379650721337) internal successors, (1778), 1336 states have internal predecessors, (1778), 365 states have call successors, (365), 128 states have call predecessors, (365), 132 states have return successors, (494), 360 states have call predecessors, (494), 356 states have call successors, (494) [2023-02-17 05:50:49,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 2637 transitions. [2023-02-17 05:50:49,802 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 2637 transitions. Word has length 43 [2023-02-17 05:50:49,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:50:49,802 INFO L495 AbstractCegarLoop]: Abstraction has 1815 states and 2637 transitions. [2023-02-17 05:50:49,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 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) [2023-02-17 05:50:49,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 2637 transitions. [2023-02-17 05:50:49,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-17 05:50:49,804 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:50:49,804 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:50:49,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-17 05:50:49,804 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:50:49,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:50:49,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1937989103, now seen corresponding path program 1 times [2023-02-17 05:50:49,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:50:49,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266109199] [2023-02-17 05:50:49,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:50:49,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:50:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:50:51,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 05:50:51,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:50:51,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 05:50:51,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:50:51,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266109199] [2023-02-17 05:50:51,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266109199] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:50:51,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558306708] [2023-02-17 05:50:51,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:50:51,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:50:51,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:50:51,770 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 05:50:51,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 05:50:55,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:50:55,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 10146 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-17 05:50:55,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:50:55,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 05:50:55,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 05:50:55,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 05:50:55,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558306708] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 05:50:55,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 05:50:55,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2023-02-17 05:50:55,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331432883] [2023-02-17 05:50:55,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 05:50:55,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 05:50:55,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:50:55,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 05:50:55,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2023-02-17 05:50:55,996 INFO L87 Difference]: Start difference. First operand 1815 states and 2637 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 05:50:58,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:51:00,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:51:03,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:51:03,771 INFO L93 Difference]: Finished difference Result 4528 states and 6798 transitions. [2023-02-17 05:51:03,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 05:51:03,772 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2023-02-17 05:51:03,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:51:03,784 INFO L225 Difference]: With dead ends: 4528 [2023-02-17 05:51:03,784 INFO L226 Difference]: Without dead ends: 2719 [2023-02-17 05:51:03,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2023-02-17 05:51:03,790 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 511 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 133 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-02-17 05:51:03,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 1363 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 769 Invalid, 2 Unknown, 0 Unchecked, 7.5s Time] [2023-02-17 05:51:03,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2719 states. [2023-02-17 05:51:03,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2719 to 1825. [2023-02-17 05:51:03,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1825 states, 1327 states have (on average 1.3474001507159006) internal successors, (1788), 1346 states have internal predecessors, (1788), 365 states have call successors, (365), 128 states have call predecessors, (365), 132 states have return successors, (494), 360 states have call predecessors, (494), 356 states have call successors, (494) [2023-02-17 05:51:03,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1825 states to 1825 states and 2647 transitions. [2023-02-17 05:51:03,883 INFO L78 Accepts]: Start accepts. Automaton has 1825 states and 2647 transitions. Word has length 44 [2023-02-17 05:51:03,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:51:03,883 INFO L495 AbstractCegarLoop]: Abstraction has 1825 states and 2647 transitions. [2023-02-17 05:51:03,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 05:51:03,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1825 states and 2647 transitions. [2023-02-17 05:51:03,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-17 05:51:03,884 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:51:03,885 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:51:03,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 05:51:04,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-17 05:51:04,097 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:51:04,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:51:04,097 INFO L85 PathProgramCache]: Analyzing trace with hash -260205666, now seen corresponding path program 2 times [2023-02-17 05:51:04,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:51:04,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775139317] [2023-02-17 05:51:04,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:51:04,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:51:05,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:51:06,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-02-17 05:51:06,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:51:06,565 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 05:51:06,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:51:06,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775139317] [2023-02-17 05:51:06,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775139317] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:51:06,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131703943] [2023-02-17 05:51:06,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 05:51:06,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:51:06,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:51:06,567 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 05:51:06,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 05:51:10,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-17 05:51:10,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 05:51:10,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 10122 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-17 05:51:10,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:51:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-17 05:51:11,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 05:51:11,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131703943] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:51:11,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 05:51:11,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-02-17 05:51:11,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292595198] [2023-02-17 05:51:11,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:51:11,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 05:51:11,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:51:11,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 05:51:11,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-02-17 05:51:11,001 INFO L87 Difference]: Start difference. First operand 1825 states and 2647 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2023-02-17 05:51:13,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:51:13,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:51:13,297 INFO L93 Difference]: Finished difference Result 1855 states and 2679 transitions. [2023-02-17 05:51:13,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 05:51:13,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) Word has length 54 [2023-02-17 05:51:13,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:51:13,304 INFO L225 Difference]: With dead ends: 1855 [2023-02-17 05:51:13,304 INFO L226 Difference]: Without dead ends: 1823 [2023-02-17 05:51:13,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-02-17 05:51:13,305 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 39 mSDsluCounter, 1417 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1896 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-02-17 05:51:13,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 1896 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2023-02-17 05:51:13,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2023-02-17 05:51:13,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1823. [2023-02-17 05:51:13,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1823 states, 1326 states have (on average 1.3461538461538463) internal successors, (1785), 1345 states have internal predecessors, (1785), 364 states have call successors, (364), 128 states have call predecessors, (364), 132 states have return successors, (493), 359 states have call predecessors, (493), 355 states have call successors, (493) [2023-02-17 05:51:13,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1823 states to 1823 states and 2642 transitions. [2023-02-17 05:51:13,379 INFO L78 Accepts]: Start accepts. Automaton has 1823 states and 2642 transitions. Word has length 54 [2023-02-17 05:51:13,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:51:13,380 INFO L495 AbstractCegarLoop]: Abstraction has 1823 states and 2642 transitions. [2023-02-17 05:51:13,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2023-02-17 05:51:13,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1823 states and 2642 transitions. [2023-02-17 05:51:13,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-17 05:51:13,381 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:51:13,381 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:51:13,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 05:51:13,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-17 05:51:13,597 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:51:13,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:51:13,597 INFO L85 PathProgramCache]: Analyzing trace with hash 462825716, now seen corresponding path program 1 times [2023-02-17 05:51:13,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:51:13,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114377582] [2023-02-17 05:51:13,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:51:13,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:51:14,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:51:15,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-17 05:51:15,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:51:15,895 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-17 05:51:15,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:51:15,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114377582] [2023-02-17 05:51:15,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114377582] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:51:15,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 05:51:15,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 05:51:15,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46988675] [2023-02-17 05:51:15,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:51:15,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 05:51:15,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:51:15,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 05:51:15,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 05:51:15,897 INFO L87 Difference]: Start difference. First operand 1823 states and 2642 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 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) [2023-02-17 05:51:18,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:51:20,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:51:22,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:51:27,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:51:27,345 INFO L93 Difference]: Finished difference Result 2645 states and 4042 transitions. [2023-02-17 05:51:27,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 05:51:27,345 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 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) Word has length 54 [2023-02-17 05:51:27,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:51:27,357 INFO L225 Difference]: With dead ends: 2645 [2023-02-17 05:51:27,357 INFO L226 Difference]: Without dead ends: 2637 [2023-02-17 05:51:27,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-17 05:51:27,359 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 1224 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 425 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1253 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2023-02-17 05:51:27,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1253 Valid, 1133 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 1067 Invalid, 3 Unknown, 0 Unchecked, 11.1s Time] [2023-02-17 05:51:27,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2023-02-17 05:51:27,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 1823. [2023-02-17 05:51:27,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1823 states, 1326 states have (on average 1.345399698340875) internal successors, (1784), 1345 states have internal predecessors, (1784), 364 states have call successors, (364), 128 states have call predecessors, (364), 132 states have return successors, (493), 359 states have call predecessors, (493), 355 states have call successors, (493) [2023-02-17 05:51:27,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1823 states to 1823 states and 2641 transitions. [2023-02-17 05:51:27,466 INFO L78 Accepts]: Start accepts. Automaton has 1823 states and 2641 transitions. Word has length 54 [2023-02-17 05:51:27,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:51:27,466 INFO L495 AbstractCegarLoop]: Abstraction has 1823 states and 2641 transitions. [2023-02-17 05:51:27,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 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) [2023-02-17 05:51:27,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1823 states and 2641 transitions. [2023-02-17 05:51:27,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-17 05:51:27,467 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:51:27,467 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:51:27,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-17 05:51:27,467 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:51:27,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:51:27,468 INFO L85 PathProgramCache]: Analyzing trace with hash 565671181, now seen corresponding path program 1 times [2023-02-17 05:51:27,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:51:27,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308172848] [2023-02-17 05:51:27,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:51:27,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:51:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:51:30,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-17 05:51:30,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:51:30,271 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-17 05:51:30,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:51:30,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308172848] [2023-02-17 05:51:30,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308172848] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:51:30,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 05:51:30,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-17 05:51:30,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203308277] [2023-02-17 05:51:30,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:51:30,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 05:51:30,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:51:30,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 05:51:30,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-17 05:51:30,276 INFO L87 Difference]: Start difference. First operand 1823 states and 2641 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 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) [2023-02-17 05:51:32,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:51:34,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:51:36,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:51:38,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:51:40,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:51:42,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:51:44,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:51:46,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:51:52,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:51:52,126 INFO L93 Difference]: Finished difference Result 1992 states and 2980 transitions. [2023-02-17 05:51:52,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 05:51:52,127 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 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) Word has length 55 [2023-02-17 05:51:52,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:51:52,136 INFO L225 Difference]: With dead ends: 1992 [2023-02-17 05:51:52,137 INFO L226 Difference]: Without dead ends: 1988 [2023-02-17 05:51:52,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-17 05:51:52,138 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 91 mSDsluCounter, 1926 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 75 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 2351 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.6s IncrementalHoareTripleChecker+Time [2023-02-17 05:51:52,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 2351 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1099 Invalid, 8 Unknown, 0 Unchecked, 21.6s Time] [2023-02-17 05:51:52,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2023-02-17 05:51:52,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1830. [2023-02-17 05:51:52,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1333 states have (on average 1.3443360840210052) internal successors, (1792), 1352 states have internal predecessors, (1792), 364 states have call successors, (364), 128 states have call predecessors, (364), 132 states have return successors, (493), 359 states have call predecessors, (493), 355 states have call successors, (493) [2023-02-17 05:51:52,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 2649 transitions. [2023-02-17 05:51:52,229 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 2649 transitions. Word has length 55 [2023-02-17 05:51:52,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:51:52,229 INFO L495 AbstractCegarLoop]: Abstraction has 1830 states and 2649 transitions. [2023-02-17 05:51:52,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 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) [2023-02-17 05:51:52,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 2649 transitions. [2023-02-17 05:51:52,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-17 05:51:52,230 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:51:52,230 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:51:52,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-17 05:51:52,230 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:51:52,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:51:52,231 INFO L85 PathProgramCache]: Analyzing trace with hash 565394351, now seen corresponding path program 1 times [2023-02-17 05:51:52,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:51:52,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118033700] [2023-02-17 05:51:52,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:51:52,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:51:53,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:51:54,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-17 05:51:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:51:54,648 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-17 05:51:54,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:51:54,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118033700] [2023-02-17 05:51:54,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118033700] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:51:54,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 05:51:54,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 05:51:54,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824083081] [2023-02-17 05:51:54,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:51:54,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 05:51:54,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:51:54,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 05:51:54,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 05:51:54,650 INFO L87 Difference]: Start difference. First operand 1830 states and 2649 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 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) [2023-02-17 05:51:56,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:51:58,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:52:00,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:52:06,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:52:06,033 INFO L93 Difference]: Finished difference Result 2646 states and 4042 transitions. [2023-02-17 05:52:06,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 05:52:06,033 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 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) Word has length 55 [2023-02-17 05:52:06,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:52:06,042 INFO L225 Difference]: With dead ends: 2646 [2023-02-17 05:52:06,042 INFO L226 Difference]: Without dead ends: 2630 [2023-02-17 05:52:06,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-17 05:52:06,044 INFO L413 NwaCegarLoop]: 494 mSDtfsCounter, 1208 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 424 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2023-02-17 05:52:06,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1238 Valid, 1130 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 1064 Invalid, 3 Unknown, 0 Unchecked, 11.1s Time] [2023-02-17 05:52:06,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2630 states. [2023-02-17 05:52:06,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2630 to 1822. [2023-02-17 05:52:06,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1326 states have (on average 1.3446455505279036) internal successors, (1783), 1345 states have internal predecessors, (1783), 363 states have call successors, (363), 128 states have call predecessors, (363), 132 states have return successors, (492), 358 states have call predecessors, (492), 354 states have call successors, (492) [2023-02-17 05:52:06,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2638 transitions. [2023-02-17 05:52:06,148 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2638 transitions. Word has length 55 [2023-02-17 05:52:06,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:52:06,148 INFO L495 AbstractCegarLoop]: Abstraction has 1822 states and 2638 transitions. [2023-02-17 05:52:06,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 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) [2023-02-17 05:52:06,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2638 transitions. [2023-02-17 05:52:06,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-17 05:52:06,149 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:52:06,149 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:52:06,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-17 05:52:06,150 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:52:06,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:52:06,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1051370444, now seen corresponding path program 1 times [2023-02-17 05:52:06,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:52:06,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725366041] [2023-02-17 05:52:06,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:52:06,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:52:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:52:08,397 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-17 05:52:08,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:52:08,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725366041] [2023-02-17 05:52:08,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725366041] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:52:08,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 05:52:08,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 05:52:08,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611435895] [2023-02-17 05:52:08,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:52:08,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 05:52:08,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:52:08,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 05:52:08,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 05:52:08,399 INFO L87 Difference]: Start difference. First operand 1822 states and 2638 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2023-02-17 05:52:09,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:52:09,388 INFO L93 Difference]: Finished difference Result 1849 states and 2663 transitions. [2023-02-17 05:52:09,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 05:52:09,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 54 [2023-02-17 05:52:09,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:52:09,401 INFO L225 Difference]: With dead ends: 1849 [2023-02-17 05:52:09,401 INFO L226 Difference]: Without dead ends: 1825 [2023-02-17 05:52:09,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 05:52:09,403 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 482 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-17 05:52:09,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 752 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-17 05:52:09,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2023-02-17 05:52:09,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 1814. [2023-02-17 05:52:09,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1319 states have (on average 1.3449583017437452) internal successors, (1774), 1339 states have internal predecessors, (1774), 363 states have call successors, (363), 128 states have call predecessors, (363), 131 states have return successors, (490), 356 states have call predecessors, (490), 354 states have call successors, (490) [2023-02-17 05:52:09,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 2627 transitions. [2023-02-17 05:52:09,585 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 2627 transitions. Word has length 54 [2023-02-17 05:52:09,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:52:09,585 INFO L495 AbstractCegarLoop]: Abstraction has 1814 states and 2627 transitions. [2023-02-17 05:52:09,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2023-02-17 05:52:09,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 2627 transitions. [2023-02-17 05:52:09,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-17 05:52:09,587 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:52:09,587 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:52:09,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-17 05:52:09,588 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:52:09,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:52:09,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1727279395, now seen corresponding path program 1 times [2023-02-17 05:52:09,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:52:09,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322606113] [2023-02-17 05:52:09,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:52:09,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:52:10,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:52:11,943 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-17 05:52:11,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:52:11,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322606113] [2023-02-17 05:52:11,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322606113] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:52:11,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 05:52:11,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 05:52:11,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173554881] [2023-02-17 05:52:11,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:52:11,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 05:52:11,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:52:11,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 05:52:11,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 05:52:11,945 INFO L87 Difference]: Start difference. First operand 1814 states and 2627 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2023-02-17 05:52:12,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:52:12,843 INFO L93 Difference]: Finished difference Result 1852 states and 2668 transitions. [2023-02-17 05:52:12,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 05:52:12,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 54 [2023-02-17 05:52:12,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:52:12,862 INFO L225 Difference]: With dead ends: 1852 [2023-02-17 05:52:12,862 INFO L226 Difference]: Without dead ends: 1815 [2023-02-17 05:52:12,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 05:52:12,864 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 467 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-17 05:52:12,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 761 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-17 05:52:12,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2023-02-17 05:52:13,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1813. [2023-02-17 05:52:13,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1318 states have (on average 1.3429438543247345) internal successors, (1770), 1338 states have internal predecessors, (1770), 363 states have call successors, (363), 128 states have call predecessors, (363), 131 states have return successors, (489), 356 states have call predecessors, (489), 354 states have call successors, (489) [2023-02-17 05:52:13,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 2622 transitions. [2023-02-17 05:52:13,043 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 2622 transitions. Word has length 54 [2023-02-17 05:52:13,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:52:13,043 INFO L495 AbstractCegarLoop]: Abstraction has 1813 states and 2622 transitions. [2023-02-17 05:52:13,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2023-02-17 05:52:13,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 2622 transitions. [2023-02-17 05:52:13,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-17 05:52:13,044 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:52:13,044 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:52:13,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-17 05:52:13,045 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:52:13,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:52:13,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1993698781, now seen corresponding path program 1 times [2023-02-17 05:52:13,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:52:13,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476549474] [2023-02-17 05:52:13,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:52:13,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:52:14,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:52:14,852 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-17 05:52:14,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:52:14,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476549474] [2023-02-17 05:52:14,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476549474] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:52:14,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 05:52:14,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 05:52:14,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179499507] [2023-02-17 05:52:14,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:52:14,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 05:52:14,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:52:14,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 05:52:14,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 05:52:14,854 INFO L87 Difference]: Start difference. First operand 1813 states and 2622 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2023-02-17 05:52:16,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:52:17,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:52:17,386 INFO L93 Difference]: Finished difference Result 2552 states and 3800 transitions. [2023-02-17 05:52:17,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 05:52:17,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 54 [2023-02-17 05:52:17,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:52:17,394 INFO L225 Difference]: With dead ends: 2552 [2023-02-17 05:52:17,395 INFO L226 Difference]: Without dead ends: 2539 [2023-02-17 05:52:17,396 INFO L412 NwaCegarLoop]: 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 [2023-02-17 05:52:17,396 INFO L413 NwaCegarLoop]: 762 mSDtfsCounter, 321 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-02-17 05:52:17,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 1173 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2023-02-17 05:52:17,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2539 states. [2023-02-17 05:52:17,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2539 to 1813. [2023-02-17 05:52:17,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1318 states have (on average 1.3406676783004552) internal successors, (1767), 1338 states have internal predecessors, (1767), 362 states have call successors, (362), 128 states have call predecessors, (362), 132 states have return successors, (497), 356 states have call predecessors, (497), 354 states have call successors, (497) [2023-02-17 05:52:17,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 2626 transitions. [2023-02-17 05:52:17,504 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 2626 transitions. Word has length 54 [2023-02-17 05:52:17,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:52:17,505 INFO L495 AbstractCegarLoop]: Abstraction has 1813 states and 2626 transitions. [2023-02-17 05:52:17,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2023-02-17 05:52:17,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 2626 transitions. [2023-02-17 05:52:17,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-17 05:52:17,506 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:52:17,506 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:52:17,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-17 05:52:17,506 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:52:17,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:52:17,506 INFO L85 PathProgramCache]: Analyzing trace with hash 2128531258, now seen corresponding path program 1 times [2023-02-17 05:52:17,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:52:17,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187519657] [2023-02-17 05:52:17,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:52:17,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:52:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:52:20,138 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-17 05:52:20,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:52:20,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187519657] [2023-02-17 05:52:20,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187519657] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:52:20,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 05:52:20,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 05:52:20,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170427428] [2023-02-17 05:52:20,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:52:20,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 05:52:20,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:52:20,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 05:52:20,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 05:52:20,140 INFO L87 Difference]: Start difference. First operand 1813 states and 2626 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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) [2023-02-17 05:52:22,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:52:24,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:52:26,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:52:28,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:52:30,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:52:30,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:52:30,786 INFO L93 Difference]: Finished difference Result 1827 states and 2641 transitions. [2023-02-17 05:52:30,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 05:52:30,787 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 55 [2023-02-17 05:52:30,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:52:30,792 INFO L225 Difference]: With dead ends: 1827 [2023-02-17 05:52:30,792 INFO L226 Difference]: Without dead ends: 1823 [2023-02-17 05:52:30,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-17 05:52:30,793 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 42 mSDsluCounter, 1789 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 2249 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2023-02-17 05:52:30,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 2249 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 5 Unknown, 0 Unchecked, 10.5s Time] [2023-02-17 05:52:30,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2023-02-17 05:52:30,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1819. [2023-02-17 05:52:30,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1324 states have (on average 1.3398791540785497) internal successors, (1774), 1344 states have internal predecessors, (1774), 362 states have call successors, (362), 128 states have call predecessors, (362), 132 states have return successors, (497), 356 states have call predecessors, (497), 354 states have call successors, (497) [2023-02-17 05:52:30,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 2633 transitions. [2023-02-17 05:52:30,988 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 2633 transitions. Word has length 55 [2023-02-17 05:52:30,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:52:30,988 INFO L495 AbstractCegarLoop]: Abstraction has 1819 states and 2633 transitions. [2023-02-17 05:52:30,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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) [2023-02-17 05:52:30,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 2633 transitions. [2023-02-17 05:52:30,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-17 05:52:30,989 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:52:30,989 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:52:30,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-17 05:52:30,990 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:52:30,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:52:30,990 INFO L85 PathProgramCache]: Analyzing trace with hash 2128254428, now seen corresponding path program 1 times [2023-02-17 05:52:30,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:52:30,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035739483] [2023-02-17 05:52:30,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:52:30,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:52:32,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:52:33,689 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-17 05:52:33,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:52:33,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035739483] [2023-02-17 05:52:33,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035739483] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:52:33,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 05:52:33,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 05:52:33,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272613837] [2023-02-17 05:52:33,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:52:33,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 05:52:33,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:52:33,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 05:52:33,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-17 05:52:33,691 INFO L87 Difference]: Start difference. First operand 1819 states and 2633 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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) [2023-02-17 05:52:35,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:52:38,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:52:38,090 INFO L93 Difference]: Finished difference Result 2559 states and 3806 transitions. [2023-02-17 05:52:38,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 05:52:38,091 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 55 [2023-02-17 05:52:38,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:52:38,098 INFO L225 Difference]: With dead ends: 2559 [2023-02-17 05:52:38,098 INFO L226 Difference]: Without dead ends: 2532 [2023-02-17 05:52:38,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-02-17 05:52:38,099 INFO L413 NwaCegarLoop]: 664 mSDtfsCounter, 1119 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 427 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1120 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-02-17 05:52:38,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1120 Valid, 1290 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 469 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2023-02-17 05:52:38,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2023-02-17 05:52:38,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 1796. [2023-02-17 05:52:38,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1301 states have (on average 1.342044581091468) internal successors, (1746), 1321 states have internal predecessors, (1746), 362 states have call successors, (362), 128 states have call predecessors, (362), 132 states have return successors, (497), 356 states have call predecessors, (497), 354 states have call successors, (497) [2023-02-17 05:52:38,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 2605 transitions. [2023-02-17 05:52:38,222 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 2605 transitions. Word has length 55 [2023-02-17 05:52:38,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:52:38,222 INFO L495 AbstractCegarLoop]: Abstraction has 1796 states and 2605 transitions. [2023-02-17 05:52:38,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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) [2023-02-17 05:52:38,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 2605 transitions. [2023-02-17 05:52:38,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-17 05:52:38,223 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:52:38,223 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:52:38,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-17 05:52:38,223 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:52:38,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:52:38,224 INFO L85 PathProgramCache]: Analyzing trace with hash -2028226751, now seen corresponding path program 1 times [2023-02-17 05:52:38,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:52:38,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228564101] [2023-02-17 05:52:38,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:52:38,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:52:39,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:52:41,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-02-17 05:52:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:52:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-17 05:52:41,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:52:41,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228564101] [2023-02-17 05:52:41,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228564101] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:52:41,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 05:52:41,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-17 05:52:41,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806724091] [2023-02-17 05:52:41,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:52:41,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 05:52:41,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:52:41,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 05:52:41,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-17 05:52:41,180 INFO L87 Difference]: Start difference. First operand 1796 states and 2605 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 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) [2023-02-17 05:52:43,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:52:45,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:52:47,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:52:49,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:52:51,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:52:53,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:52:55,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:52:57,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:53:02,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:53:02,783 INFO L93 Difference]: Finished difference Result 1956 states and 2933 transitions. [2023-02-17 05:53:02,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 05:53:02,784 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 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) Word has length 57 [2023-02-17 05:53:02,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:53:02,790 INFO L225 Difference]: With dead ends: 1956 [2023-02-17 05:53:02,790 INFO L226 Difference]: Without dead ends: 1937 [2023-02-17 05:53:02,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-17 05:53:02,791 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 87 mSDsluCounter, 1765 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 71 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 2153 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.4s IncrementalHoareTripleChecker+Time [2023-02-17 05:53:02,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 2153 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1051 Invalid, 8 Unknown, 0 Unchecked, 21.4s Time] [2023-02-17 05:53:02,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2023-02-17 05:53:02,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1783. [2023-02-17 05:53:02,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1289 states have (on average 1.343677269200931) internal successors, (1732), 1309 states have internal predecessors, (1732), 361 states have call successors, (361), 128 states have call predecessors, (361), 132 states have return successors, (496), 355 states have call predecessors, (496), 353 states have call successors, (496) [2023-02-17 05:53:02,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 2589 transitions. [2023-02-17 05:53:02,908 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 2589 transitions. Word has length 57 [2023-02-17 05:53:02,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:53:02,908 INFO L495 AbstractCegarLoop]: Abstraction has 1783 states and 2589 transitions. [2023-02-17 05:53:02,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 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) [2023-02-17 05:53:02,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 2589 transitions. [2023-02-17 05:53:02,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-17 05:53:02,910 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:53:02,910 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:53:02,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-17 05:53:02,910 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:53:02,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:53:02,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1367138182, now seen corresponding path program 1 times [2023-02-17 05:53:02,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:53:02,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109349649] [2023-02-17 05:53:02,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:53:02,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:53:04,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:53:05,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-02-17 05:53:05,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:53:05,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 05:53:05,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:53:06,092 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-17 05:53:06,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:53:06,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109349649] [2023-02-17 05:53:06,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109349649] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:53:06,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 05:53:06,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-17 05:53:06,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531733246] [2023-02-17 05:53:06,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:53:06,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 05:53:06,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:53:06,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 05:53:06,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-02-17 05:53:06,093 INFO L87 Difference]: Start difference. First operand 1783 states and 2589 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 05:53:08,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:53:10,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:53:12,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:53:14,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:53:16,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-17 05:53:18,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []