./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/floppy.i.cil-3.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 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 10:57:52,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 10:57:52,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 10:57:52,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 10:57:52,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 10:57:52,579 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 10:57:52,580 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 10:57:52,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 10:57:52,583 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 10:57:52,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 10:57:52,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 10:57:52,585 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 10:57:52,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 10:57:52,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 10:57:52,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 10:57:52,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 10:57:52,589 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 10:57:52,590 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 10:57:52,591 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 10:57:52,593 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 10:57:52,594 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 10:57:52,595 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 10:57:52,596 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 10:57:52,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 10:57:52,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 10:57:52,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 10:57:52,601 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 10:57:52,601 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 10:57:52,602 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 10:57:52,602 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 10:57:52,603 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 10:57:52,603 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 10:57:52,604 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 10:57:52,605 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 10:57:52,606 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 10:57:52,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 10:57:52,607 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 10:57:52,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 10:57:52,608 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 10:57:52,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 10:57:52,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 10:57:52,612 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 10:57:52,614 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 10:57:52,640 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 10:57:52,640 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 10:57:52,640 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 10:57:52,641 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 10:57:52,641 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 10:57:52,641 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 10:57:52,642 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 10:57:52,642 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 10:57:52,642 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 10:57:52,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 10:57:52,643 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 10:57:52,644 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 10:57:52,644 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 10:57:52,644 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 10:57:52,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 10:57:52,644 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 10:57:52,645 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 10:57:52,645 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 10:57:52,645 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 10:57:52,645 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 10:57:52,645 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 10:57:52,646 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 10:57:52,646 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 10:57:52,646 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 10:57:52,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:57:52,646 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 10:57:52,647 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 10:57:52,647 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 10:57:52,647 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 10:57:52,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 10:57:52,647 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 10:57:52,648 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 10:57:52,648 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 10:57:52,648 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 [2022-07-19 10:57:52,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 10:57:52,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 10:57:52,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 10:57:52,865 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 10:57:52,865 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 10:57:52,866 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2022-07-19 10:57:52,924 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2d43d7df/da4fc53974744f6fae0ac2ed25a2eb27/FLAG0a6c500cd [2022-07-19 10:57:53,569 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 10:57:53,570 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2022-07-19 10:57:53,618 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2d43d7df/da4fc53974744f6fae0ac2ed25a2eb27/FLAG0a6c500cd [2022-07-19 10:57:53,753 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2d43d7df/da4fc53974744f6fae0ac2ed25a2eb27 [2022-07-19 10:57:53,756 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 10:57:53,757 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 10:57:53,758 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 10:57:53,758 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 10:57:53,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 10:57:53,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:57:53" (1/1) ... [2022-07-19 10:57:53,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56c00cef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:53, skipping insertion in model container [2022-07-19 10:57:53,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:57:53" (1/1) ... [2022-07-19 10:57:53,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 10:57:53,863 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 10:57:54,358 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2022-07-19 10:57:54,700 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:57:54,726 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 10:57:54,769 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2022-07-19 10:57:55,011 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:57:55,059 INFO L208 MainTranslator]: Completed translation [2022-07-19 10:57:55,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:55 WrapperNode [2022-07-19 10:57:55,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 10:57:55,061 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 10:57:55,061 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 10:57:55,062 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 10:57:55,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:55" (1/1) ... [2022-07-19 10:57:55,172 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:55" (1/1) ... [2022-07-19 10:57:55,284 INFO L137 Inliner]: procedures = 128, calls = 2887, calls flagged for inlining = 37, calls inlined = 26, statements flattened = 3086 [2022-07-19 10:57:55,284 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 10:57:55,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 10:57:55,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 10:57:55,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 10:57:55,293 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:55" (1/1) ... [2022-07-19 10:57:55,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:55" (1/1) ... [2022-07-19 10:57:55,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:55" (1/1) ... [2022-07-19 10:57:55,343 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:55" (1/1) ... [2022-07-19 10:57:55,431 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:55" (1/1) ... [2022-07-19 10:57:55,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:55" (1/1) ... [2022-07-19 10:57:55,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:55" (1/1) ... [2022-07-19 10:57:55,484 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 10:57:55,485 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 10:57:55,485 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 10:57:55,485 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 10:57:55,486 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:55" (1/1) ... [2022-07-19 10:57:55,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:57:55,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:57:55,520 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) [2022-07-19 10:57:55,544 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 [2022-07-19 10:57:55,564 INFO L130 BoogieDeclarations]: Found specification of procedure IoGetConfigurationInformation [2022-07-19 10:57:55,564 INFO L138 BoogieDeclarations]: Found implementation of procedure IoGetConfigurationInformation [2022-07-19 10:57:55,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-07-19 10:57:55,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-07-19 10:57:55,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-19 10:57:55,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 10:57:55,565 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-07-19 10:57:55,565 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-07-19 10:57:55,565 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-07-19 10:57:55,565 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-07-19 10:57:55,565 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2022-07-19 10:57:55,565 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2022-07-19 10:57:55,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 10:57:55,566 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2022-07-19 10:57:55,566 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2022-07-19 10:57:55,566 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-07-19 10:57:55,566 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-07-19 10:57:55,566 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedExchange [2022-07-19 10:57:55,566 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedExchange [2022-07-19 10:57:55,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-19 10:57:55,567 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-19 10:57:55,567 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-07-19 10:57:55,567 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-07-19 10:57:55,567 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-07-19 10:57:55,567 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-07-19 10:57:55,567 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2022-07-19 10:57:55,568 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2022-07-19 10:57:55,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 10:57:55,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 10:57:55,568 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2022-07-19 10:57:55,568 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2022-07-19 10:57:55,568 INFO L130 BoogieDeclarations]: Found specification of procedure ExfInterlockedInsertTailList [2022-07-19 10:57:55,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ExfInterlockedInsertTailList [2022-07-19 10:57:55,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 10:57:55,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-19 10:57:55,569 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-07-19 10:57:55,569 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-07-19 10:57:55,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-19 10:57:55,569 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2022-07-19 10:57:55,570 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2022-07-19 10:57:55,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 10:57:55,570 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-07-19 10:57:55,570 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-07-19 10:57:55,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2022-07-19 10:57:55,570 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2022-07-19 10:57:55,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 10:57:55,571 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_guard [2022-07-19 10:57:55,571 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_guard [2022-07-19 10:57:55,571 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2022-07-19 10:57:55,571 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2022-07-19 10:57:55,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-07-19 10:57:55,572 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2022-07-19 10:57:55,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2022-07-19 10:57:55,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 10:57:55,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 10:57:56,025 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 10:57:56,027 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 10:57:56,082 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:56,096 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-07-19 10:57:56,096 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-07-19 10:57:56,100 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:56,247 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2022-07-19 10:57:56,247 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2022-07-19 10:57:56,266 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:56,277 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-07-19 10:57:56,278 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-07-19 10:57:56,348 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:56,366 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-07-19 10:57:56,367 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-07-19 10:57:56,367 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:56,368 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:56,368 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:56,467 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume !false; [2022-07-19 10:57:56,467 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2022-07-19 10:57:56,468 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2022-07-19 10:57:56,468 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume false; [2022-07-19 10:57:56,468 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2022-07-19 10:57:56,468 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2022-07-19 10:57:56,470 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:56,476 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:56,477 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:57,031 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2022-07-19 10:57:57,032 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2022-07-19 10:57:57,032 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##139: assume false; [2022-07-19 10:57:57,032 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##140: assume !false; [2022-07-19 10:57:57,032 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##124: assume !false; [2022-07-19 10:57:57,032 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##123: assume false; [2022-07-19 10:57:57,064 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:57,101 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-07-19 10:57:57,102 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-07-19 10:57:57,109 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:57,110 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:57,112 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:57,113 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:57,113 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:57,116 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:57,118 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:57,147 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:58:00,532 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##97: assume !false; [2022-07-19 10:58:00,533 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##96: assume false; [2022-07-19 10:58:00,533 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##76: assume false; [2022-07-19 10:58:00,533 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##177: assume !false; [2022-07-19 10:58:00,533 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##176: assume false; [2022-07-19 10:58:00,533 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##77: assume !false; [2022-07-19 10:58:00,533 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##48: assume !false; [2022-07-19 10:58:00,533 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume false; [2022-07-19 10:58:00,533 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##27: assume !false; [2022-07-19 10:58:00,533 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume false; [2022-07-19 10:58:00,533 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##162: assume false; [2022-07-19 10:58:00,533 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##163: assume !false; [2022-07-19 10:58:00,534 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##210: assume false; [2022-07-19 10:58:00,534 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##211: assume !false; [2022-07-19 10:58:00,534 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##108: assume !false; [2022-07-19 10:58:00,534 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##107: assume false; [2022-07-19 10:58:00,545 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 10:58:00,561 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 10:58:00,563 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-19 10:58:00,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:58:00 BoogieIcfgContainer [2022-07-19 10:58:00,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 10:58:00,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 10:58:00,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 10:58:00,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 10:58:00,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 10:57:53" (1/3) ... [2022-07-19 10:58:00,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b59f3e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:58:00, skipping insertion in model container [2022-07-19 10:58:00,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:55" (2/3) ... [2022-07-19 10:58:00,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b59f3e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:58:00, skipping insertion in model container [2022-07-19 10:58:00,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:58:00" (3/3) ... [2022-07-19 10:58:00,579 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy.i.cil-3.c [2022-07-19 10:58:00,591 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 10:58:00,591 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 10:58:00,669 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 10:58:00,675 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@10d1173e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4e343bec [2022-07-19 10:58:00,675 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 10:58:00,682 INFO L276 IsEmpty]: Start isEmpty. Operand has 580 states, 463 states have (on average 1.4989200863930885) internal successors, (694), 496 states have internal predecessors, (694), 95 states have call successors, (95), 20 states have call predecessors, (95), 20 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) [2022-07-19 10:58:00,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-19 10:58:00,692 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:00,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:58:00,693 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:00,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:00,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1811520219, now seen corresponding path program 1 times [2022-07-19 10:58:00,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:00,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195438786] [2022-07-19 10:58:00,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:00,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:01,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:01,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:58:01,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:01,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:58:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:01,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:01,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:01,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195438786] [2022-07-19 10:58:01,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195438786] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:01,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:01,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:58:01,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111703771] [2022-07-19 10:58:01,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:01,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:58:01,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:01,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:58:01,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:58:01,431 INFO L87 Difference]: Start difference. First operand has 580 states, 463 states have (on average 1.4989200863930885) internal successors, (694), 496 states have internal predecessors, (694), 95 states have call successors, (95), 20 states have call predecessors, (95), 20 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:58:05,593 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:05,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:05,895 INFO L93 Difference]: Finished difference Result 1174 states and 1848 transitions. [2022-07-19 10:58:05,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:58:05,897 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-07-19 10:58:05,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:05,916 INFO L225 Difference]: With dead ends: 1174 [2022-07-19 10:58:05,917 INFO L226 Difference]: Without dead ends: 657 [2022-07-19 10:58:05,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:58:05,928 INFO L413 NwaCegarLoop]: 771 mSDtfsCounter, 400 mSDsluCounter, 1385 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 238 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 2156 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:05,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 2156 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 785 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2022-07-19 10:58:05,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-07-19 10:58:06,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 579. [2022-07-19 10:58:06,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 462 states have (on average 1.4567099567099566) internal successors, (673), 493 states have internal predecessors, (673), 95 states have call successors, (95), 22 states have call predecessors, (95), 21 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-07-19 10:58:06,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 840 transitions. [2022-07-19 10:58:06,022 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 840 transitions. Word has length 26 [2022-07-19 10:58:06,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:06,022 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 840 transitions. [2022-07-19 10:58:06,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:58:06,023 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 840 transitions. [2022-07-19 10:58:06,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-19 10:58:06,024 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:06,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:58:06,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 10:58:06,026 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:06,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:06,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1723209200, now seen corresponding path program 1 times [2022-07-19 10:58:06,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:06,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459683351] [2022-07-19 10:58:06,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:06,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:06,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:06,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:58:06,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:06,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:58:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:06,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:06,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:06,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459683351] [2022-07-19 10:58:06,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459683351] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:06,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:06,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 10:58:06,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100055861] [2022-07-19 10:58:06,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:06,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 10:58:06,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:06,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 10:58:06,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:58:06,271 INFO L87 Difference]: Start difference. First operand 579 states and 840 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 10:58:09,847 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:10,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:10,115 INFO L93 Difference]: Finished difference Result 1217 states and 1784 transitions. [2022-07-19 10:58:10,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:58:10,116 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2022-07-19 10:58:10,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:10,121 INFO L225 Difference]: With dead ends: 1217 [2022-07-19 10:58:10,121 INFO L226 Difference]: Without dead ends: 657 [2022-07-19 10:58:10,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:58:10,124 INFO L413 NwaCegarLoop]: 761 mSDtfsCounter, 366 mSDsluCounter, 2004 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 228 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 2765 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:10,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 2765 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 986 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2022-07-19 10:58:10,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-07-19 10:58:10,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 579. [2022-07-19 10:58:10,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 462 states have (on average 1.4545454545454546) internal successors, (672), 493 states have internal predecessors, (672), 95 states have call successors, (95), 22 states have call predecessors, (95), 21 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-07-19 10:58:10,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 839 transitions. [2022-07-19 10:58:10,155 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 839 transitions. Word has length 29 [2022-07-19 10:58:10,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:10,155 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 839 transitions. [2022-07-19 10:58:10,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 10:58:10,156 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 839 transitions. [2022-07-19 10:58:10,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-19 10:58:10,157 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:10,157 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:58:10,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 10:58:10,157 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:10,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:10,158 INFO L85 PathProgramCache]: Analyzing trace with hash 51194362, now seen corresponding path program 1 times [2022-07-19 10:58:10,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:10,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198455000] [2022-07-19 10:58:10,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:10,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:10,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:58:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:10,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:58:10,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:10,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:10,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:10,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198455000] [2022-07-19 10:58:10,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198455000] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:10,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:10,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:58:10,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176549128] [2022-07-19 10:58:10,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:10,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:58:10,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:10,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:58:10,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:58:10,453 INFO L87 Difference]: Start difference. First operand 579 states and 839 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 10:58:13,696 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:14,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:14,922 INFO L93 Difference]: Finished difference Result 1542 states and 2294 transitions. [2022-07-19 10:58:14,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:58:14,923 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2022-07-19 10:58:14,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:14,930 INFO L225 Difference]: With dead ends: 1542 [2022-07-19 10:58:14,930 INFO L226 Difference]: Without dead ends: 1127 [2022-07-19 10:58:14,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:58:14,933 INFO L413 NwaCegarLoop]: 941 mSDtfsCounter, 1330 mSDsluCounter, 1487 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 426 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1367 SdHoareTripleChecker+Valid, 2428 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:14,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1367 Valid, 2428 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 1032 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2022-07-19 10:58:14,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-07-19 10:58:14,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 1008. [2022-07-19 10:58:14,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 832 states have (on average 1.4399038461538463) internal successors, (1198), 859 states have internal predecessors, (1198), 132 states have call successors, (132), 40 states have call predecessors, (132), 43 states have return successors, (155), 116 states have call predecessors, (155), 117 states have call successors, (155) [2022-07-19 10:58:14,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1485 transitions. [2022-07-19 10:58:14,978 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 1485 transitions. Word has length 33 [2022-07-19 10:58:14,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:14,979 INFO L495 AbstractCegarLoop]: Abstraction has 1008 states and 1485 transitions. [2022-07-19 10:58:14,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 10:58:14,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 1485 transitions. [2022-07-19 10:58:14,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 10:58:14,982 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:14,982 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:58:14,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 10:58:14,982 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:14,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:14,983 INFO L85 PathProgramCache]: Analyzing trace with hash -778149095, now seen corresponding path program 1 times [2022-07-19 10:58:14,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:14,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664632746] [2022-07-19 10:58:14,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:14,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:15,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:58:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:15,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:58:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:15,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 10:58:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:15,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:15,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:15,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664632746] [2022-07-19 10:58:15,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664632746] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:15,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:15,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:58:15,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203277079] [2022-07-19 10:58:15,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:15,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:58:15,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:15,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:58:15,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:58:15,303 INFO L87 Difference]: Start difference. First operand 1008 states and 1485 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:58:18,610 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:19,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:19,552 INFO L93 Difference]: Finished difference Result 1879 states and 2849 transitions. [2022-07-19 10:58:19,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:58:19,553 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-07-19 10:58:19,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:19,563 INFO L225 Difference]: With dead ends: 1879 [2022-07-19 10:58:19,564 INFO L226 Difference]: Without dead ends: 1860 [2022-07-19 10:58:19,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:58:19,567 INFO L413 NwaCegarLoop]: 795 mSDtfsCounter, 1460 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 406 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1530 SdHoareTripleChecker+Valid, 2050 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:19,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1530 Valid, 2050 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 823 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2022-07-19 10:58:19,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2022-07-19 10:58:19,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1624. [2022-07-19 10:58:19,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1348 states have (on average 1.4614243323442135) internal successors, (1970), 1393 states have internal predecessors, (1970), 203 states have call successors, (203), 65 states have call predecessors, (203), 72 states have return successors, (264), 178 states have call predecessors, (264), 188 states have call successors, (264) [2022-07-19 10:58:19,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2437 transitions. [2022-07-19 10:58:19,641 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2437 transitions. Word has length 45 [2022-07-19 10:58:19,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:19,642 INFO L495 AbstractCegarLoop]: Abstraction has 1624 states and 2437 transitions. [2022-07-19 10:58:19,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:58:19,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2437 transitions. [2022-07-19 10:58:19,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 10:58:19,644 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:19,644 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:58:19,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 10:58:19,645 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:19,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:19,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1291674765, now seen corresponding path program 1 times [2022-07-19 10:58:19,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:19,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233508802] [2022-07-19 10:58:19,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:19,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:19,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:19,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:58:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:19,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:58:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:19,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:19,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:19,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233508802] [2022-07-19 10:58:19,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233508802] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:19,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:19,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:58:19,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183199815] [2022-07-19 10:58:19,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:19,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:58:19,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:19,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:58:19,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:58:19,939 INFO L87 Difference]: Start difference. First operand 1624 states and 2437 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 10:58:23,712 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:24,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:24,221 INFO L93 Difference]: Finished difference Result 1856 states and 2829 transitions. [2022-07-19 10:58:24,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:58:24,222 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2022-07-19 10:58:24,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:24,232 INFO L225 Difference]: With dead ends: 1856 [2022-07-19 10:58:24,232 INFO L226 Difference]: Without dead ends: 1852 [2022-07-19 10:58:24,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:58:24,234 INFO L413 NwaCegarLoop]: 735 mSDtfsCounter, 467 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 246 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 2039 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:24,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 2039 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 771 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2022-07-19 10:58:24,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2022-07-19 10:58:24,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1657. [2022-07-19 10:58:24,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1379 states have (on average 1.4612037708484409) internal successors, (2015), 1421 states have internal predecessors, (2015), 204 states have call successors, (204), 67 states have call predecessors, (204), 73 states have return successors, (265), 179 states have call predecessors, (265), 189 states have call successors, (265) [2022-07-19 10:58:24,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 2484 transitions. [2022-07-19 10:58:24,301 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 2484 transitions. Word has length 43 [2022-07-19 10:58:24,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:24,301 INFO L495 AbstractCegarLoop]: Abstraction has 1657 states and 2484 transitions. [2022-07-19 10:58:24,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 10:58:24,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 2484 transitions. [2022-07-19 10:58:24,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 10:58:24,303 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:24,303 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:58:24,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 10:58:24,304 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:24,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:24,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1850160334, now seen corresponding path program 1 times [2022-07-19 10:58:24,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:24,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882662405] [2022-07-19 10:58:24,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:24,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:24,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:58:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:24,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:58:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:24,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:24,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882662405] [2022-07-19 10:58:24,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882662405] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:24,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:24,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:58:24,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535197498] [2022-07-19 10:58:24,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:24,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:58:24,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:24,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:58:24,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:58:24,539 INFO L87 Difference]: Start difference. First operand 1657 states and 2484 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 10:58:28,090 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:29,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:29,417 INFO L93 Difference]: Finished difference Result 3293 states and 5099 transitions. [2022-07-19 10:58:29,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:58:29,418 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2022-07-19 10:58:29,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:29,436 INFO L225 Difference]: With dead ends: 3293 [2022-07-19 10:58:29,436 INFO L226 Difference]: Without dead ends: 3290 [2022-07-19 10:58:29,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:58:29,440 INFO L413 NwaCegarLoop]: 1177 mSDtfsCounter, 925 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 310 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 954 SdHoareTripleChecker+Valid, 2956 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:29,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [954 Valid, 2956 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 1186 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2022-07-19 10:58:29,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3290 states. [2022-07-19 10:58:29,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3290 to 2657. [2022-07-19 10:58:29,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2657 states, 2246 states have (on average 1.4746215494211932) internal successors, (3312), 2298 states have internal predecessors, (3312), 292 states have call successors, (292), 107 states have call predecessors, (292), 118 states have return successors, (418), 262 states have call predecessors, (418), 277 states have call successors, (418) [2022-07-19 10:58:29,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2657 states to 2657 states and 4022 transitions. [2022-07-19 10:58:29,551 INFO L78 Accepts]: Start accepts. Automaton has 2657 states and 4022 transitions. Word has length 45 [2022-07-19 10:58:29,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:29,552 INFO L495 AbstractCegarLoop]: Abstraction has 2657 states and 4022 transitions. [2022-07-19 10:58:29,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 10:58:29,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2657 states and 4022 transitions. [2022-07-19 10:58:29,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-19 10:58:29,553 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:29,553 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:58:29,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 10:58:29,554 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:29,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:29,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1615003555, now seen corresponding path program 1 times [2022-07-19 10:58:29,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:29,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025475352] [2022-07-19 10:58:29,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:29,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:29,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:58:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:29,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:58:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:29,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 10:58:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:29,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 10:58:29,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:29,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:29,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:29,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025475352] [2022-07-19 10:58:29,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025475352] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:29,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:29,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 10:58:29,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974132516] [2022-07-19 10:58:29,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:29,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 10:58:29,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:29,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 10:58:29,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:58:29,864 INFO L87 Difference]: Start difference. First operand 2657 states and 4022 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-19 10:58:33,938 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:35,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:35,628 INFO L93 Difference]: Finished difference Result 3942 states and 6165 transitions. [2022-07-19 10:58:35,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 10:58:35,630 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2022-07-19 10:58:35,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:35,649 INFO L225 Difference]: With dead ends: 3942 [2022-07-19 10:58:35,649 INFO L226 Difference]: Without dead ends: 3937 [2022-07-19 10:58:35,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-07-19 10:58:35,653 INFO L413 NwaCegarLoop]: 1083 mSDtfsCounter, 1251 mSDsluCounter, 1824 mSDsCounter, 0 mSdLazyCounter, 1635 mSolverCounterSat, 602 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1272 SdHoareTripleChecker+Valid, 2907 SdHoareTripleChecker+Invalid, 2238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 1635 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:35,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1272 Valid, 2907 Invalid, 2238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 1635 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2022-07-19 10:58:35,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3937 states. [2022-07-19 10:58:35,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3937 to 3272. [2022-07-19 10:58:35,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3272 states, 2761 states have (on average 1.4791742122419413) internal successors, (4084), 2832 states have internal predecessors, (4084), 364 states have call successors, (364), 126 states have call predecessors, (364), 146 states have return successors, (557), 324 states have call predecessors, (557), 349 states have call successors, (557) [2022-07-19 10:58:35,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3272 states to 3272 states and 5005 transitions. [2022-07-19 10:58:35,797 INFO L78 Accepts]: Start accepts. Automaton has 3272 states and 5005 transitions. Word has length 48 [2022-07-19 10:58:35,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:35,797 INFO L495 AbstractCegarLoop]: Abstraction has 3272 states and 5005 transitions. [2022-07-19 10:58:35,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-19 10:58:35,798 INFO L276 IsEmpty]: Start isEmpty. Operand 3272 states and 5005 transitions. [2022-07-19 10:58:35,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-19 10:58:35,799 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:35,799 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:58:35,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 10:58:35,800 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:35,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:35,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1759276290, now seen corresponding path program 1 times [2022-07-19 10:58:35,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:35,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599602157] [2022-07-19 10:58:35,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:35,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:35,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:36,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:58:36,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:36,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:58:36,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:36,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:36,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:36,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599602157] [2022-07-19 10:58:36,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599602157] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:36,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:36,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 10:58:36,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705234347] [2022-07-19 10:58:36,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:36,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 10:58:36,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:36,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 10:58:36,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:58:36,058 INFO L87 Difference]: Start difference. First operand 3272 states and 5005 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:58:39,749 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:41,843 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:43,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:43,078 INFO L93 Difference]: Finished difference Result 7046 states and 10914 transitions. [2022-07-19 10:58:43,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 10:58:43,079 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2022-07-19 10:58:43,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:43,100 INFO L225 Difference]: With dead ends: 7046 [2022-07-19 10:58:43,100 INFO L226 Difference]: Without dead ends: 4021 [2022-07-19 10:58:43,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-07-19 10:58:43,115 INFO L413 NwaCegarLoop]: 903 mSDtfsCounter, 2317 mSDsluCounter, 1376 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 770 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2364 SdHoareTripleChecker+Valid, 2279 SdHoareTripleChecker+Invalid, 1937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 770 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:43,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2364 Valid, 2279 Invalid, 1937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [770 Valid, 1165 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-07-19 10:58:43,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4021 states. [2022-07-19 10:58:43,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4021 to 3266. [2022-07-19 10:58:43,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3266 states, 2755 states have (on average 1.4773139745916515) internal successors, (4070), 2826 states have internal predecessors, (4070), 364 states have call successors, (364), 126 states have call predecessors, (364), 146 states have return successors, (557), 324 states have call predecessors, (557), 349 states have call successors, (557) [2022-07-19 10:58:43,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3266 states to 3266 states and 4991 transitions. [2022-07-19 10:58:43,308 INFO L78 Accepts]: Start accepts. Automaton has 3266 states and 4991 transitions. Word has length 46 [2022-07-19 10:58:43,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:43,309 INFO L495 AbstractCegarLoop]: Abstraction has 3266 states and 4991 transitions. [2022-07-19 10:58:43,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:58:43,309 INFO L276 IsEmpty]: Start isEmpty. Operand 3266 states and 4991 transitions. [2022-07-19 10:58:43,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-19 10:58:43,312 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:43,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:58:43,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 10:58:43,312 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:43,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:43,313 INFO L85 PathProgramCache]: Analyzing trace with hash 436509709, now seen corresponding path program 1 times [2022-07-19 10:58:43,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:43,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744295172] [2022-07-19 10:58:43,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:43,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:43,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:43,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:58:43,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:43,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:58:43,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:43,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-19 10:58:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:43,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:43,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:43,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744295172] [2022-07-19 10:58:43,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744295172] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:43,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:43,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 10:58:43,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270562695] [2022-07-19 10:58:43,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:43,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 10:58:43,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:43,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 10:58:43,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:58:43,534 INFO L87 Difference]: Start difference. First operand 3266 states and 4991 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:58:46,924 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:48,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:48,877 INFO L93 Difference]: Finished difference Result 10834 states and 17245 transitions. [2022-07-19 10:58:48,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 10:58:48,878 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-07-19 10:58:48,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:48,937 INFO L225 Difference]: With dead ends: 10834 [2022-07-19 10:58:48,938 INFO L226 Difference]: Without dead ends: 7785 [2022-07-19 10:58:48,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2022-07-19 10:58:48,961 INFO L413 NwaCegarLoop]: 954 mSDtfsCounter, 2093 mSDsluCounter, 1768 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 707 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2169 SdHoareTripleChecker+Valid, 2722 SdHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 707 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:48,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2169 Valid, 2722 Invalid, 1936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [707 Valid, 1228 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2022-07-19 10:58:48,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7785 states. [2022-07-19 10:58:49,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7785 to 6900. [2022-07-19 10:58:49,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 5812 states have (on average 1.4893324156916723) internal successors, (8656), 6037 states have internal predecessors, (8656), 801 states have call successors, (801), 234 states have call predecessors, (801), 286 states have return successors, (1391), 659 states have call predecessors, (1391), 789 states have call successors, (1391) [2022-07-19 10:58:49,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 10848 transitions. [2022-07-19 10:58:49,365 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 10848 transitions. Word has length 47 [2022-07-19 10:58:49,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:49,367 INFO L495 AbstractCegarLoop]: Abstraction has 6900 states and 10848 transitions. [2022-07-19 10:58:49,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:58:49,368 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 10848 transitions. [2022-07-19 10:58:49,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-19 10:58:49,369 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:49,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:58:49,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 10:58:49,370 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:49,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:49,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1022322752, now seen corresponding path program 1 times [2022-07-19 10:58:49,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:49,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394423466] [2022-07-19 10:58:49,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:49,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:49,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:58:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:49,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:58:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:49,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 10:58:49,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:49,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 10:58:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:49,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:49,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394423466] [2022-07-19 10:58:49,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394423466] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:49,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:49,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 10:58:49,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933963837] [2022-07-19 10:58:49,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:49,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 10:58:49,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:49,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 10:58:49,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:58:49,720 INFO L87 Difference]: Start difference. First operand 6900 states and 10848 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 10:58:54,177 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:57,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:57,191 INFO L93 Difference]: Finished difference Result 7819 states and 12472 transitions. [2022-07-19 10:58:57,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 10:58:57,192 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-07-19 10:58:57,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:57,225 INFO L225 Difference]: With dead ends: 7819 [2022-07-19 10:58:57,225 INFO L226 Difference]: Without dead ends: 7813 [2022-07-19 10:58:57,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2022-07-19 10:58:57,233 INFO L413 NwaCegarLoop]: 1056 mSDtfsCounter, 2723 mSDsluCounter, 2145 mSDsCounter, 0 mSdLazyCounter, 2060 mSolverCounterSat, 1105 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2786 SdHoareTripleChecker+Valid, 3201 SdHoareTripleChecker+Invalid, 3166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1105 IncrementalHoareTripleChecker+Valid, 2060 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:57,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2786 Valid, 3201 Invalid, 3166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1105 Valid, 2060 Invalid, 1 Unknown, 0 Unchecked, 6.8s Time] [2022-07-19 10:58:57,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7813 states. [2022-07-19 10:58:57,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7813 to 6900. [2022-07-19 10:58:57,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 5812 states have (on average 1.4891603578802477) internal successors, (8655), 6037 states have internal predecessors, (8655), 801 states have call successors, (801), 234 states have call predecessors, (801), 286 states have return successors, (1391), 659 states have call predecessors, (1391), 789 states have call successors, (1391) [2022-07-19 10:58:57,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 10847 transitions. [2022-07-19 10:58:57,605 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 10847 transitions. Word has length 49 [2022-07-19 10:58:57,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:57,606 INFO L495 AbstractCegarLoop]: Abstraction has 6900 states and 10847 transitions. [2022-07-19 10:58:57,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 10:58:57,606 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 10847 transitions. [2022-07-19 10:58:57,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-19 10:58:57,607 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:57,607 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:58:57,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 10:58:57,608 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:57,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:57,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1807638448, now seen corresponding path program 1 times [2022-07-19 10:58:57,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:57,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240605143] [2022-07-19 10:58:57,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:57,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:57,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:57,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:58:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:57,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:58:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:57,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 10:58:57,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:57,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 10:58:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:57,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:57,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240605143] [2022-07-19 10:58:57,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240605143] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:57,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:57,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 10:58:57,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586101151] [2022-07-19 10:58:57,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:57,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 10:58:57,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:57,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 10:58:57,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:58:57,969 INFO L87 Difference]: Start difference. First operand 6900 states and 10847 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 10:59:02,745 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:04,776 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:07,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:59:07,724 INFO L93 Difference]: Finished difference Result 7815 states and 12466 transitions. [2022-07-19 10:59:07,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 10:59:07,725 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2022-07-19 10:59:07,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:59:07,753 INFO L225 Difference]: With dead ends: 7815 [2022-07-19 10:59:07,754 INFO L226 Difference]: Without dead ends: 7809 [2022-07-19 10:59:07,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2022-07-19 10:59:07,760 INFO L413 NwaCegarLoop]: 1056 mSDtfsCounter, 2321 mSDsluCounter, 2490 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 849 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2384 SdHoareTripleChecker+Valid, 3546 SdHoareTripleChecker+Invalid, 3443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 849 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:59:07,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2384 Valid, 3546 Invalid, 3443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [849 Valid, 2592 Invalid, 2 Unknown, 0 Unchecked, 9.1s Time] [2022-07-19 10:59:07,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7809 states. [2022-07-19 10:59:08,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7809 to 6900. [2022-07-19 10:59:08,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 5812 states have (on average 1.488988300068823) internal successors, (8654), 6037 states have internal predecessors, (8654), 801 states have call successors, (801), 234 states have call predecessors, (801), 286 states have return successors, (1391), 659 states have call predecessors, (1391), 789 states have call successors, (1391) [2022-07-19 10:59:08,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 10846 transitions. [2022-07-19 10:59:08,129 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 10846 transitions. Word has length 50 [2022-07-19 10:59:08,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:59:08,129 INFO L495 AbstractCegarLoop]: Abstraction has 6900 states and 10846 transitions. [2022-07-19 10:59:08,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 10:59:08,130 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 10846 transitions. [2022-07-19 10:59:08,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-19 10:59:08,131 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:59:08,131 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:59:08,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 10:59:08,131 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:59:08,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:59:08,132 INFO L85 PathProgramCache]: Analyzing trace with hash -376802648, now seen corresponding path program 1 times [2022-07-19 10:59:08,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:59:08,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387582076] [2022-07-19 10:59:08,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:59:08,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:59:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:08,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:59:08,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:08,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:59:08,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:08,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 10:59:08,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:08,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 10:59:08,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:08,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:59:08,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:59:08,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387582076] [2022-07-19 10:59:08,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387582076] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:59:08,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:59:08,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 10:59:08,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108115849] [2022-07-19 10:59:08,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:59:08,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 10:59:08,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:59:08,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 10:59:08,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:59:08,452 INFO L87 Difference]: Start difference. First operand 6900 states and 10846 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-19 10:59:13,049 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:15,077 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:16,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:59:16,351 INFO L93 Difference]: Finished difference Result 7824 states and 12487 transitions. [2022-07-19 10:59:16,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 10:59:16,351 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2022-07-19 10:59:16,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:59:16,381 INFO L225 Difference]: With dead ends: 7824 [2022-07-19 10:59:16,381 INFO L226 Difference]: Without dead ends: 7807 [2022-07-19 10:59:16,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-07-19 10:59:16,389 INFO L413 NwaCegarLoop]: 712 mSDtfsCounter, 683 mSDsluCounter, 2806 mSDsCounter, 0 mSdLazyCounter, 2135 mSolverCounterSat, 278 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 2415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 2135 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-07-19 10:59:16,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 3518 Invalid, 2415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 2135 Invalid, 2 Unknown, 0 Unchecked, 7.5s Time] [2022-07-19 10:59:16,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7807 states. [2022-07-19 10:59:16,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7807 to 6904. [2022-07-19 10:59:16,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6904 states, 5815 states have (on average 1.4885640584694755) internal successors, (8656), 6042 states have internal predecessors, (8656), 800 states have call successors, (800), 234 states have call predecessors, (800), 288 states have return successors, (1397), 658 states have call predecessors, (1397), 788 states have call successors, (1397) [2022-07-19 10:59:16,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6904 states to 6904 states and 10853 transitions. [2022-07-19 10:59:16,798 INFO L78 Accepts]: Start accepts. Automaton has 6904 states and 10853 transitions. Word has length 50 [2022-07-19 10:59:16,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:59:16,798 INFO L495 AbstractCegarLoop]: Abstraction has 6904 states and 10853 transitions. [2022-07-19 10:59:16,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-19 10:59:16,798 INFO L276 IsEmpty]: Start isEmpty. Operand 6904 states and 10853 transitions. [2022-07-19 10:59:16,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-19 10:59:16,800 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:59:16,800 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:59:16,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 10:59:16,800 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:59:16,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:59:16,801 INFO L85 PathProgramCache]: Analyzing trace with hash 286289769, now seen corresponding path program 1 times [2022-07-19 10:59:16,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:59:16,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814484674] [2022-07-19 10:59:16,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:59:16,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:59:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:16,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:59:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:16,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:59:16,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:17,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 10:59:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:17,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 10:59:17,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:17,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:59:17,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:59:17,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814484674] [2022-07-19 10:59:17,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814484674] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:59:17,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:59:17,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 10:59:17,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065065111] [2022-07-19 10:59:17,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:59:17,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 10:59:17,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:59:17,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 10:59:17,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:59:17,071 INFO L87 Difference]: Start difference. First operand 6904 states and 10853 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-19 10:59:22,078 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:24,105 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:25,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:59:25,383 INFO L93 Difference]: Finished difference Result 7822 states and 12483 transitions. [2022-07-19 10:59:25,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 10:59:25,383 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2022-07-19 10:59:25,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:59:25,413 INFO L225 Difference]: With dead ends: 7822 [2022-07-19 10:59:25,414 INFO L226 Difference]: Without dead ends: 7800 [2022-07-19 10:59:25,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-07-19 10:59:25,421 INFO L413 NwaCegarLoop]: 712 mSDtfsCounter, 682 mSDsluCounter, 2806 mSDsCounter, 0 mSdLazyCounter, 2129 mSolverCounterSat, 273 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 2404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 2129 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-07-19 10:59:25,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [708 Valid, 3518 Invalid, 2404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 2129 Invalid, 2 Unknown, 0 Unchecked, 7.9s Time] [2022-07-19 10:59:25,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7800 states. [2022-07-19 10:59:25,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7800 to 6897. [2022-07-19 10:59:25,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6897 states, 5811 states have (on average 1.4887282739631733) internal successors, (8651), 6038 states have internal predecessors, (8651), 798 states have call successors, (798), 233 states have call predecessors, (798), 287 states have return successors, (1395), 656 states have call predecessors, (1395), 786 states have call successors, (1395) [2022-07-19 10:59:25,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6897 states to 6897 states and 10844 transitions. [2022-07-19 10:59:25,825 INFO L78 Accepts]: Start accepts. Automaton has 6897 states and 10844 transitions. Word has length 51 [2022-07-19 10:59:25,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:59:25,826 INFO L495 AbstractCegarLoop]: Abstraction has 6897 states and 10844 transitions. [2022-07-19 10:59:25,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-19 10:59:25,826 INFO L276 IsEmpty]: Start isEmpty. Operand 6897 states and 10844 transitions. [2022-07-19 10:59:25,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-19 10:59:25,832 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:59:25,833 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:59:25,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 10:59:25,834 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:59:25,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:59:25,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1945256571, now seen corresponding path program 1 times [2022-07-19 10:59:25,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:59:25,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426937339] [2022-07-19 10:59:25,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:59:25,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:59:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:25,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:59:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:25,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:59:25,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:26,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-19 10:59:26,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:26,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:59:26,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:59:26,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426937339] [2022-07-19 10:59:26,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426937339] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:59:26,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:59:26,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 10:59:26,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192496254] [2022-07-19 10:59:26,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:59:26,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 10:59:26,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:59:26,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 10:59:26,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:59:26,054 INFO L87 Difference]: Start difference. First operand 6897 states and 10844 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 10:59:28,235 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:31,169 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:32,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:59:32,148 INFO L93 Difference]: Finished difference Result 13804 states and 22175 transitions. [2022-07-19 10:59:32,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 10:59:32,149 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-07-19 10:59:32,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:59:32,181 INFO L225 Difference]: With dead ends: 13804 [2022-07-19 10:59:32,181 INFO L226 Difference]: Without dead ends: 8064 [2022-07-19 10:59:32,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:59:32,214 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 411 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 236 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 2070 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-07-19 10:59:32,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 2070 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 921 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2022-07-19 10:59:32,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8064 states. [2022-07-19 10:59:32,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8064 to 7053. [2022-07-19 10:59:32,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7053 states, 5967 states have (on average 1.4799731858555387) internal successors, (8831), 6194 states have internal predecessors, (8831), 798 states have call successors, (798), 233 states have call predecessors, (798), 287 states have return successors, (1395), 656 states have call predecessors, (1395), 786 states have call successors, (1395) [2022-07-19 10:59:32,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7053 states to 7053 states and 11024 transitions. [2022-07-19 10:59:32,649 INFO L78 Accepts]: Start accepts. Automaton has 7053 states and 11024 transitions. Word has length 52 [2022-07-19 10:59:32,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:59:32,650 INFO L495 AbstractCegarLoop]: Abstraction has 7053 states and 11024 transitions. [2022-07-19 10:59:32,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 10:59:32,650 INFO L276 IsEmpty]: Start isEmpty. Operand 7053 states and 11024 transitions. [2022-07-19 10:59:32,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-19 10:59:32,652 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:59:32,652 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:59:32,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 10:59:32,653 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:59:32,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:59:32,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1217127572, now seen corresponding path program 1 times [2022-07-19 10:59:32,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:59:32,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827678304] [2022-07-19 10:59:32,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:59:32,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:59:32,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:32,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:59:32,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:32,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:59:32,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:32,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 10:59:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:32,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:59:32,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:59:32,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827678304] [2022-07-19 10:59:32,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827678304] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:59:32,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:59:32,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 10:59:32,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301991456] [2022-07-19 10:59:32,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:59:32,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 10:59:32,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:59:32,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 10:59:32,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:59:32,866 INFO L87 Difference]: Start difference. First operand 7053 states and 11024 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 10:59:37,570 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:38,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:59:38,607 INFO L93 Difference]: Finished difference Result 8020 states and 12715 transitions. [2022-07-19 10:59:38,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 10:59:38,607 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2022-07-19 10:59:38,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:59:38,631 INFO L225 Difference]: With dead ends: 8020 [2022-07-19 10:59:38,631 INFO L226 Difference]: Without dead ends: 8002 [2022-07-19 10:59:38,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-19 10:59:38,637 INFO L413 NwaCegarLoop]: 710 mSDtfsCounter, 868 mSDsluCounter, 2093 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 374 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 2803 SdHoareTripleChecker+Invalid, 1780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:59:38,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [891 Valid, 2803 Invalid, 1780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 1405 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2022-07-19 10:59:38,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8002 states. [2022-07-19 10:59:39,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8002 to 7051. [2022-07-19 10:59:39,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7051 states, 5966 states have (on average 1.479886020784445) internal successors, (8829), 6193 states have internal predecessors, (8829), 797 states have call successors, (797), 233 states have call predecessors, (797), 287 states have return successors, (1394), 655 states have call predecessors, (1394), 785 states have call successors, (1394) [2022-07-19 10:59:39,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7051 states to 7051 states and 11020 transitions. [2022-07-19 10:59:39,085 INFO L78 Accepts]: Start accepts. Automaton has 7051 states and 11020 transitions. Word has length 53 [2022-07-19 10:59:39,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:59:39,085 INFO L495 AbstractCegarLoop]: Abstraction has 7051 states and 11020 transitions. [2022-07-19 10:59:39,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 10:59:39,086 INFO L276 IsEmpty]: Start isEmpty. Operand 7051 states and 11020 transitions. [2022-07-19 10:59:39,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-19 10:59:39,089 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:59:39,090 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:59:39,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 10:59:39,090 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:59:39,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:59:39,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1937199149, now seen corresponding path program 1 times [2022-07-19 10:59:39,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:59:39,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147454487] [2022-07-19 10:59:39,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:59:39,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:59:39,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:39,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:59:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:39,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:59:39,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:39,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:59:39,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:59:39,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147454487] [2022-07-19 10:59:39,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147454487] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:59:39,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:59:39,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 10:59:39,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780150291] [2022-07-19 10:59:39,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:59:39,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 10:59:39,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:59:39,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 10:59:39,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:59:39,310 INFO L87 Difference]: Start difference. First operand 7051 states and 11020 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:59:42,996 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:43,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:59:43,986 INFO L93 Difference]: Finished difference Result 11721 states and 18614 transitions. [2022-07-19 10:59:43,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 10:59:43,986 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-07-19 10:59:43,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:59:44,008 INFO L225 Difference]: With dead ends: 11721 [2022-07-19 10:59:44,009 INFO L226 Difference]: Without dead ends: 7953 [2022-07-19 10:59:44,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-07-19 10:59:44,028 INFO L413 NwaCegarLoop]: 690 mSDtfsCounter, 1185 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 352 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 1858 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:59:44,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1236 Valid, 1858 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 906 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2022-07-19 10:59:44,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7953 states. [2022-07-19 10:59:44,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7953 to 7041. [2022-07-19 10:59:44,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7041 states, 5957 states have (on average 1.4787644787644787) internal successors, (8809), 6184 states have internal predecessors, (8809), 797 states have call successors, (797), 233 states have call predecessors, (797), 286 states have return successors, (1393), 654 states have call predecessors, (1393), 784 states have call successors, (1393) [2022-07-19 10:59:44,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7041 states to 7041 states and 10999 transitions. [2022-07-19 10:59:44,424 INFO L78 Accepts]: Start accepts. Automaton has 7041 states and 10999 transitions. Word has length 52 [2022-07-19 10:59:44,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:59:44,424 INFO L495 AbstractCegarLoop]: Abstraction has 7041 states and 10999 transitions. [2022-07-19 10:59:44,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:59:44,424 INFO L276 IsEmpty]: Start isEmpty. Operand 7041 states and 10999 transitions. [2022-07-19 10:59:44,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-19 10:59:44,426 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:59:44,426 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:59:44,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 10:59:44,427 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:59:44,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:59:44,427 INFO L85 PathProgramCache]: Analyzing trace with hash 872726643, now seen corresponding path program 1 times [2022-07-19 10:59:44,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:59:44,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730948476] [2022-07-19 10:59:44,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:59:44,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:59:44,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:44,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:59:44,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:44,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:59:44,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:44,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-19 10:59:44,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:44,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 10:59:44,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:44,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:59:44,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:59:44,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730948476] [2022-07-19 10:59:44,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730948476] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:59:44,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:59:44,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 10:59:44,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161408929] [2022-07-19 10:59:44,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:59:44,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 10:59:44,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:59:44,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 10:59:44,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:59:44,756 INFO L87 Difference]: Start difference. First operand 7041 states and 10999 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-19 10:59:48,780 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:50,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:59:50,012 INFO L93 Difference]: Finished difference Result 8024 states and 12754 transitions. [2022-07-19 10:59:50,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 10:59:50,013 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2022-07-19 10:59:50,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:59:50,035 INFO L225 Difference]: With dead ends: 8024 [2022-07-19 10:59:50,035 INFO L226 Difference]: Without dead ends: 8008 [2022-07-19 10:59:50,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-07-19 10:59:50,042 INFO L413 NwaCegarLoop]: 703 mSDtfsCounter, 932 mSDsluCounter, 2603 mSDsCounter, 0 mSdLazyCounter, 1743 mSolverCounterSat, 479 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 3306 SdHoareTripleChecker+Invalid, 2223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 1743 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-07-19 10:59:50,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [955 Valid, 3306 Invalid, 2223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 1743 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2022-07-19 10:59:50,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8008 states. [2022-07-19 10:59:50,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8008 to 7047. [2022-07-19 10:59:50,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7047 states, 5960 states have (on average 1.4785234899328858) internal successors, (8812), 6190 states have internal predecessors, (8812), 797 states have call successors, (797), 233 states have call predecessors, (797), 289 states have return successors, (1415), 654 states have call predecessors, (1415), 784 states have call successors, (1415) [2022-07-19 10:59:50,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7047 states to 7047 states and 11024 transitions. [2022-07-19 10:59:50,524 INFO L78 Accepts]: Start accepts. Automaton has 7047 states and 11024 transitions. Word has length 55 [2022-07-19 10:59:50,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:59:50,524 INFO L495 AbstractCegarLoop]: Abstraction has 7047 states and 11024 transitions. [2022-07-19 10:59:50,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-19 10:59:50,525 INFO L276 IsEmpty]: Start isEmpty. Operand 7047 states and 11024 transitions. [2022-07-19 10:59:50,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-19 10:59:50,527 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:59:50,527 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:59:50,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 10:59:50,527 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:59:50,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:59:50,528 INFO L85 PathProgramCache]: Analyzing trace with hash 555700014, now seen corresponding path program 1 times [2022-07-19 10:59:50,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:59:50,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177356858] [2022-07-19 10:59:50,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:59:50,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:59:50,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:50,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:59:50,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:50,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:59:50,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:50,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:59:50,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:59:50,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177356858] [2022-07-19 10:59:50,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177356858] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:59:50,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:59:50,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:59:50,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304323719] [2022-07-19 10:59:50,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:59:50,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:59:50,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:59:50,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:59:50,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:59:50,796 INFO L87 Difference]: Start difference. First operand 7047 states and 11024 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 10:59:54,496 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:56,580 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:58,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:59:58,704 INFO L93 Difference]: Finished difference Result 10992 states and 17757 transitions. [2022-07-19 10:59:58,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:59:58,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2022-07-19 10:59:58,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:59:58,738 INFO L225 Difference]: With dead ends: 10992 [2022-07-19 10:59:58,738 INFO L226 Difference]: Without dead ends: 10979 [2022-07-19 10:59:58,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:59:58,746 INFO L413 NwaCegarLoop]: 1203 mSDtfsCounter, 966 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 308 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 997 SdHoareTripleChecker+Valid, 3004 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:59:58,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [997 Valid, 3004 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 1184 Invalid, 2 Unknown, 0 Unchecked, 7.4s Time] [2022-07-19 10:59:58,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10979 states. [2022-07-19 10:59:59,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10979 to 8362. [2022-07-19 10:59:59,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8362 states, 7112 states have (on average 1.4822834645669292) internal successors, (10542), 7344 states have internal predecessors, (10542), 910 states have call successors, (910), 275 states have call predecessors, (910), 339 states have return successors, (1687), 773 states have call predecessors, (1687), 897 states have call successors, (1687) [2022-07-19 10:59:59,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8362 states to 8362 states and 13139 transitions. [2022-07-19 10:59:59,219 INFO L78 Accepts]: Start accepts. Automaton has 8362 states and 13139 transitions. Word has length 54 [2022-07-19 10:59:59,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:59:59,219 INFO L495 AbstractCegarLoop]: Abstraction has 8362 states and 13139 transitions. [2022-07-19 10:59:59,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 10:59:59,220 INFO L276 IsEmpty]: Start isEmpty. Operand 8362 states and 13139 transitions. [2022-07-19 10:59:59,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-19 10:59:59,221 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:59:59,222 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:59:59,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-19 10:59:59,222 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:59:59,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:59:59,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1129689134, now seen corresponding path program 1 times [2022-07-19 10:59:59,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:59:59,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487725953] [2022-07-19 10:59:59,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:59:59,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:59:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:59,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 10:59:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:59,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 10:59:59,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:59,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:59:59,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:59:59,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487725953] [2022-07-19 10:59:59,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487725953] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:59:59,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:59:59,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 10:59:59,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155787435] [2022-07-19 10:59:59,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:59:59,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 10:59:59,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:59:59,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 10:59:59,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:59:59,497 INFO L87 Difference]: Start difference. First operand 8362 states and 13139 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 11:00:03,312 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:04,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:00:04,317 INFO L93 Difference]: Finished difference Result 13163 states and 20813 transitions. [2022-07-19 11:00:04,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 11:00:04,318 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-07-19 11:00:04,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:00:04,344 INFO L225 Difference]: With dead ends: 13163 [2022-07-19 11:00:04,344 INFO L226 Difference]: Without dead ends: 8839 [2022-07-19 11:00:04,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-07-19 11:00:04,361 INFO L413 NwaCegarLoop]: 697 mSDtfsCounter, 1171 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 333 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1222 SdHoareTripleChecker+Valid, 1866 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-19 11:00:04,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1222 Valid, 1866 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 853 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2022-07-19 11:00:04,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8839 states. [2022-07-19 11:00:04,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8839 to 6799. [2022-07-19 11:00:04,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6799 states, 5772 states have (on average 1.48007623007623) internal successors, (8543), 5976 states have internal predecessors, (8543), 751 states have call successors, (751), 230 states have call predecessors, (751), 275 states have return successors, (1161), 623 states have call predecessors, (1161), 738 states have call successors, (1161) [2022-07-19 11:00:04,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6799 states to 6799 states and 10455 transitions. [2022-07-19 11:00:04,749 INFO L78 Accepts]: Start accepts. Automaton has 6799 states and 10455 transitions. Word has length 54 [2022-07-19 11:00:04,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:00:04,749 INFO L495 AbstractCegarLoop]: Abstraction has 6799 states and 10455 transitions. [2022-07-19 11:00:04,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 11:00:04,749 INFO L276 IsEmpty]: Start isEmpty. Operand 6799 states and 10455 transitions. [2022-07-19 11:00:04,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-19 11:00:04,751 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:00:04,751 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:00:04,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 11:00:04,751 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:00:04,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:00:04,752 INFO L85 PathProgramCache]: Analyzing trace with hash 238766756, now seen corresponding path program 1 times [2022-07-19 11:00:04,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:00:04,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930610530] [2022-07-19 11:00:04,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:00:04,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:00:04,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:04,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 11:00:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:04,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 11:00:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:04,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 11:00:04,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:04,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:00:04,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:00:04,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930610530] [2022-07-19 11:00:04,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930610530] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:00:04,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:00:04,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 11:00:04,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949910595] [2022-07-19 11:00:04,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:00:04,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 11:00:04,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:00:04,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 11:00:04,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 11:00:04,990 INFO L87 Difference]: Start difference. First operand 6799 states and 10455 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 11:00:09,498 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:10,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:00:10,765 INFO L93 Difference]: Finished difference Result 7691 states and 11990 transitions. [2022-07-19 11:00:10,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 11:00:10,765 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2022-07-19 11:00:10,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:00:10,791 INFO L225 Difference]: With dead ends: 7691 [2022-07-19 11:00:10,792 INFO L226 Difference]: Without dead ends: 7673 [2022-07-19 11:00:10,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-19 11:00:10,799 INFO L413 NwaCegarLoop]: 716 mSDtfsCounter, 861 mSDsluCounter, 2096 mSDsCounter, 0 mSdLazyCounter, 1401 mSolverCounterSat, 371 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 2812 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 1401 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-07-19 11:00:10,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [884 Valid, 2812 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 1401 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2022-07-19 11:00:10,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7673 states. [2022-07-19 11:00:11,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7673 to 6796. [2022-07-19 11:00:11,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6796 states, 5770 states have (on average 1.4800693240901213) internal successors, (8540), 5974 states have internal predecessors, (8540), 750 states have call successors, (750), 230 states have call predecessors, (750), 275 states have return successors, (1160), 622 states have call predecessors, (1160), 737 states have call successors, (1160) [2022-07-19 11:00:11,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6796 states to 6796 states and 10450 transitions. [2022-07-19 11:00:11,308 INFO L78 Accepts]: Start accepts. Automaton has 6796 states and 10450 transitions. Word has length 55 [2022-07-19 11:00:11,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:00:11,308 INFO L495 AbstractCegarLoop]: Abstraction has 6796 states and 10450 transitions. [2022-07-19 11:00:11,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 11:00:11,310 INFO L276 IsEmpty]: Start isEmpty. Operand 6796 states and 10450 transitions. [2022-07-19 11:00:11,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-19 11:00:11,312 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:00:11,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:00:11,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-19 11:00:11,312 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:00:11,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:00:11,313 INFO L85 PathProgramCache]: Analyzing trace with hash 499005845, now seen corresponding path program 1 times [2022-07-19 11:00:11,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:00:11,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249014500] [2022-07-19 11:00:11,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:00:11,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:00:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:11,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 11:00:11,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:11,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 11:00:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:11,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:00:11,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:00:11,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249014500] [2022-07-19 11:00:11,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249014500] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:00:11,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:00:11,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 11:00:11,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164741944] [2022-07-19 11:00:11,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:00:11,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 11:00:11,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:00:11,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 11:00:11,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 11:00:11,572 INFO L87 Difference]: Start difference. First operand 6796 states and 10450 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 11:00:15,353 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:17,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:00:17,961 INFO L93 Difference]: Finished difference Result 9126 states and 14313 transitions. [2022-07-19 11:00:17,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 11:00:17,962 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-07-19 11:00:17,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:00:17,991 INFO L225 Difference]: With dead ends: 9126 [2022-07-19 11:00:17,991 INFO L226 Difference]: Without dead ends: 9122 [2022-07-19 11:00:17,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-07-19 11:00:17,999 INFO L413 NwaCegarLoop]: 1149 mSDtfsCounter, 1660 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 535 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1717 SdHoareTripleChecker+Valid, 2790 SdHoareTripleChecker+Invalid, 1798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:00:18,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1717 Valid, 2790 Invalid, 1798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 1262 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2022-07-19 11:00:18,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9122 states. [2022-07-19 11:00:18,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9122 to 6807. [2022-07-19 11:00:18,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6807 states, 5780 states have (on average 1.479757785467128) internal successors, (8553), 5982 states have internal predecessors, (8553), 750 states have call successors, (750), 230 states have call predecessors, (750), 276 states have return successors, (1164), 625 states have call predecessors, (1164), 737 states have call successors, (1164) [2022-07-19 11:00:18,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6807 states to 6807 states and 10467 transitions. [2022-07-19 11:00:18,528 INFO L78 Accepts]: Start accepts. Automaton has 6807 states and 10467 transitions. Word has length 55 [2022-07-19 11:00:18,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:00:18,529 INFO L495 AbstractCegarLoop]: Abstraction has 6807 states and 10467 transitions. [2022-07-19 11:00:18,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 11:00:18,529 INFO L276 IsEmpty]: Start isEmpty. Operand 6807 states and 10467 transitions. [2022-07-19 11:00:18,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-19 11:00:18,531 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:00:18,531 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:00:18,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-19 11:00:18,531 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:00:18,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:00:18,532 INFO L85 PathProgramCache]: Analyzing trace with hash 499282675, now seen corresponding path program 1 times [2022-07-19 11:00:18,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:00:18,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635760779] [2022-07-19 11:00:18,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:00:18,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:00:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:18,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 11:00:18,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:18,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 11:00:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:00:18,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:00:18,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635760779] [2022-07-19 11:00:18,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635760779] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:00:18,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:00:18,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 11:00:18,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971623039] [2022-07-19 11:00:18,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:00:18,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 11:00:18,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:00:18,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 11:00:18,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 11:00:18,831 INFO L87 Difference]: Start difference. First operand 6807 states and 10467 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 11:00:23,515 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:24,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:00:24,487 INFO L93 Difference]: Finished difference Result 7650 states and 11920 transitions. [2022-07-19 11:00:24,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 11:00:24,488 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2022-07-19 11:00:24,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:00:24,506 INFO L225 Difference]: With dead ends: 7650 [2022-07-19 11:00:24,506 INFO L226 Difference]: Without dead ends: 7607 [2022-07-19 11:00:24,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-19 11:00:24,511 INFO L413 NwaCegarLoop]: 708 mSDtfsCounter, 410 mSDsluCounter, 2955 mSDsCounter, 0 mSdLazyCounter, 1440 mSolverCounterSat, 192 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 3663 SdHoareTripleChecker+Invalid, 1633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1440 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-07-19 11:00:24,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 3663 Invalid, 1633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1440 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2022-07-19 11:00:24,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7607 states. [2022-07-19 11:00:24,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7607 to 6777. [2022-07-19 11:00:24,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6777 states, 5751 states have (on average 1.480264301860546) internal successors, (8513), 5953 states have internal predecessors, (8513), 749 states have call successors, (749), 230 states have call predecessors, (749), 276 states have return successors, (1162), 624 states have call predecessors, (1162), 736 states have call successors, (1162) [2022-07-19 11:00:24,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6777 states to 6777 states and 10424 transitions. [2022-07-19 11:00:24,920 INFO L78 Accepts]: Start accepts. Automaton has 6777 states and 10424 transitions. Word has length 55 [2022-07-19 11:00:24,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:00:24,920 INFO L495 AbstractCegarLoop]: Abstraction has 6777 states and 10424 transitions. [2022-07-19 11:00:24,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 11:00:24,921 INFO L276 IsEmpty]: Start isEmpty. Operand 6777 states and 10424 transitions. [2022-07-19 11:00:24,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-19 11:00:24,922 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:00:24,922 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:00:24,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-19 11:00:24,923 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:00:24,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:00:24,923 INFO L85 PathProgramCache]: Analyzing trace with hash 948026652, now seen corresponding path program 1 times [2022-07-19 11:00:24,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:00:24,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295055760] [2022-07-19 11:00:24,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:00:24,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:00:25,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:25,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 11:00:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:25,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 11:00:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:25,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-19 11:00:25,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:25,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 11:00:25,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:25,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:00:25,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:00:25,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295055760] [2022-07-19 11:00:25,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295055760] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:00:25,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:00:25,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 11:00:25,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685234877] [2022-07-19 11:00:25,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:00:25,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 11:00:25,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:00:25,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 11:00:25,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-19 11:00:25,234 INFO L87 Difference]: Start difference. First operand 6777 states and 10424 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-19 11:00:30,085 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:31,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:00:31,195 INFO L93 Difference]: Finished difference Result 13421 states and 21123 transitions. [2022-07-19 11:00:31,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 11:00:31,196 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 60 [2022-07-19 11:00:31,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:00:31,213 INFO L225 Difference]: With dead ends: 13421 [2022-07-19 11:00:31,213 INFO L226 Difference]: Without dead ends: 7857 [2022-07-19 11:00:31,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-07-19 11:00:31,226 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 381 mSDsluCounter, 2420 mSDsCounter, 0 mSdLazyCounter, 1699 mSolverCounterSat, 229 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 3070 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 1699 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:00:31,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 3070 Invalid, 1929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 1699 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2022-07-19 11:00:31,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7857 states. [2022-07-19 11:00:31,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7857 to 6853. [2022-07-19 11:00:31,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6853 states, 5807 states have (on average 1.4756328568968486) internal successors, (8569), 6017 states have internal predecessors, (8569), 749 states have call successors, (749), 230 states have call predecessors, (749), 296 states have return successors, (1233), 636 states have call predecessors, (1233), 736 states have call successors, (1233) [2022-07-19 11:00:31,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6853 states to 6853 states and 10551 transitions. [2022-07-19 11:00:31,581 INFO L78 Accepts]: Start accepts. Automaton has 6853 states and 10551 transitions. Word has length 60 [2022-07-19 11:00:31,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:00:31,581 INFO L495 AbstractCegarLoop]: Abstraction has 6853 states and 10551 transitions. [2022-07-19 11:00:31,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-19 11:00:31,582 INFO L276 IsEmpty]: Start isEmpty. Operand 6853 states and 10551 transitions. [2022-07-19 11:00:31,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-19 11:00:31,584 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:00:31,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:00:31,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-19 11:00:31,584 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:00:31,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:00:31,585 INFO L85 PathProgramCache]: Analyzing trace with hash -749476623, now seen corresponding path program 1 times [2022-07-19 11:00:31,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:00:31,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720121051] [2022-07-19 11:00:31,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:00:31,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:00:31,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:31,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 11:00:31,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:31,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 11:00:31,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:31,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-19 11:00:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:31,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 11:00:31,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:00:31,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:00:31,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720121051] [2022-07-19 11:00:31,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720121051] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:00:31,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:00:31,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-19 11:00:31,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452687716] [2022-07-19 11:00:31,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:00:31,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 11:00:31,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:00:31,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 11:00:31,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-07-19 11:00:31,928 INFO L87 Difference]: Start difference. First operand 6853 states and 10551 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-19 11:00:37,642 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:39,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:00:39,174 INFO L93 Difference]: Finished difference Result 7755 states and 12177 transitions. [2022-07-19 11:00:39,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 11:00:39,174 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 62 [2022-07-19 11:00:39,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:00:39,201 INFO L225 Difference]: With dead ends: 7755 [2022-07-19 11:00:39,201 INFO L226 Difference]: Without dead ends: 7741 [2022-07-19 11:00:39,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-07-19 11:00:39,208 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 908 mSDsluCounter, 3500 mSDsCounter, 0 mSdLazyCounter, 2878 mSolverCounterSat, 473 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 932 SdHoareTripleChecker+Valid, 4150 SdHoareTripleChecker+Invalid, 3352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 473 IncrementalHoareTripleChecker+Valid, 2878 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:00:39,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [932 Valid, 4150 Invalid, 3352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [473 Valid, 2878 Invalid, 1 Unknown, 0 Unchecked, 6.7s Time] [2022-07-19 11:00:39,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7741 states. [2022-07-19 11:00:39,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7741 to 6855. [2022-07-19 11:00:39,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6855 states, 5808 states have (on average 1.475550964187328) internal successors, (8570), 6019 states have internal predecessors, (8570), 749 states have call successors, (749), 230 states have call predecessors, (749), 297 states have return successors, (1248), 636 states have call predecessors, (1248), 736 states have call successors, (1248) [2022-07-19 11:00:39,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6855 states to 6855 states and 10567 transitions. [2022-07-19 11:00:39,641 INFO L78 Accepts]: Start accepts. Automaton has 6855 states and 10567 transitions. Word has length 62 [2022-07-19 11:00:39,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:00:39,642 INFO L495 AbstractCegarLoop]: Abstraction has 6855 states and 10567 transitions. [2022-07-19 11:00:39,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-19 11:00:39,642 INFO L276 IsEmpty]: Start isEmpty. Operand 6855 states and 10567 transitions. [2022-07-19 11:00:39,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-19 11:00:39,645 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:00:39,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:00:39,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-19 11:00:39,646 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:00:39,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:00:39,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1416668636, now seen corresponding path program 1 times [2022-07-19 11:00:39,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:00:39,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427484694] [2022-07-19 11:00:39,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:00:39,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:00:39,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:39,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 11:00:39,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:39,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 11:00:39,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:39,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-19 11:00:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:39,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 11:00:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:39,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 11:00:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:39,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 11:00:39,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:39,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:00:39,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:00:39,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427484694] [2022-07-19 11:00:39,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427484694] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:00:39,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:00:39,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 11:00:39,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305526506] [2022-07-19 11:00:39,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:00:39,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 11:00:39,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:00:39,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 11:00:39,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-19 11:00:39,985 INFO L87 Difference]: Start difference. First operand 6855 states and 10567 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 11:00:44,100 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:46,131 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:49,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:00:49,063 INFO L93 Difference]: Finished difference Result 10875 states and 17003 transitions. [2022-07-19 11:00:49,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 11:00:49,063 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 65 [2022-07-19 11:00:49,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:00:49,088 INFO L225 Difference]: With dead ends: 10875 [2022-07-19 11:00:49,088 INFO L226 Difference]: Without dead ends: 7624 [2022-07-19 11:00:49,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-07-19 11:00:49,101 INFO L413 NwaCegarLoop]: 1119 mSDtfsCounter, 914 mSDsluCounter, 1881 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 401 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 3000 SdHoareTripleChecker+Invalid, 2133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-07-19 11:00:49,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [957 Valid, 3000 Invalid, 2133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 1730 Invalid, 2 Unknown, 0 Unchecked, 8.3s Time] [2022-07-19 11:00:49,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7624 states. [2022-07-19 11:00:49,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7624 to 6723. [2022-07-19 11:00:49,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6723 states, 5693 states have (on average 1.476725803618479) internal successors, (8407), 5908 states have internal predecessors, (8407), 738 states have call successors, (738), 227 states have call predecessors, (738), 291 states have return successors, (1189), 617 states have call predecessors, (1189), 717 states have call successors, (1189) [2022-07-19 11:00:49,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6723 states to 6723 states and 10334 transitions. [2022-07-19 11:00:49,559 INFO L78 Accepts]: Start accepts. Automaton has 6723 states and 10334 transitions. Word has length 65 [2022-07-19 11:00:49,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:00:49,559 INFO L495 AbstractCegarLoop]: Abstraction has 6723 states and 10334 transitions. [2022-07-19 11:00:49,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 11:00:49,559 INFO L276 IsEmpty]: Start isEmpty. Operand 6723 states and 10334 transitions. [2022-07-19 11:00:49,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-19 11:00:49,561 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:00:49,561 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:00:49,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-19 11:00:49,561 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:00:49,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:00:49,562 INFO L85 PathProgramCache]: Analyzing trace with hash -340114262, now seen corresponding path program 1 times [2022-07-19 11:00:49,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:00:49,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396225717] [2022-07-19 11:00:49,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:00:49,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:00:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:49,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 11:00:49,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:49,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 11:00:49,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:49,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-19 11:00:49,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:49,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 11:00:49,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:49,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 11:00:49,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:49,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:00:49,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:00:49,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396225717] [2022-07-19 11:00:49,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396225717] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:00:49,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:00:49,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 11:00:49,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871740971] [2022-07-19 11:00:49,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:00:49,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 11:00:49,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:00:49,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 11:00:49,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 11:00:49,854 INFO L87 Difference]: Start difference. First operand 6723 states and 10334 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-19 11:00:54,064 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:55,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:00:55,023 INFO L93 Difference]: Finished difference Result 13105 states and 20530 transitions. [2022-07-19 11:00:55,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 11:00:55,023 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 66 [2022-07-19 11:00:55,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:00:55,049 INFO L225 Difference]: With dead ends: 13105 [2022-07-19 11:00:55,050 INFO L226 Difference]: Without dead ends: 7568 [2022-07-19 11:00:55,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-19 11:00:55,071 INFO L413 NwaCegarLoop]: 663 mSDtfsCounter, 439 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 294 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 1822 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:00:55,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 1822 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 814 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2022-07-19 11:00:55,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7568 states. [2022-07-19 11:00:55,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7568 to 6629. [2022-07-19 11:00:55,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6629 states, 5601 states have (on average 1.4767005891805034) internal successors, (8271), 5826 states have internal predecessors, (8271), 744 states have call successors, (744), 227 states have call predecessors, (744), 283 states have return successors, (1184), 605 states have call predecessors, (1184), 723 states have call successors, (1184) [2022-07-19 11:00:55,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6629 states to 6629 states and 10199 transitions. [2022-07-19 11:00:55,457 INFO L78 Accepts]: Start accepts. Automaton has 6629 states and 10199 transitions. Word has length 66 [2022-07-19 11:00:55,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:00:55,457 INFO L495 AbstractCegarLoop]: Abstraction has 6629 states and 10199 transitions. [2022-07-19 11:00:55,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-19 11:00:55,458 INFO L276 IsEmpty]: Start isEmpty. Operand 6629 states and 10199 transitions. [2022-07-19 11:00:55,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-19 11:00:55,460 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:00:55,460 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:00:55,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-19 11:00:55,461 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:00:55,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:00:55,461 INFO L85 PathProgramCache]: Analyzing trace with hash 437037204, now seen corresponding path program 1 times [2022-07-19 11:00:55,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:00:55,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554125313] [2022-07-19 11:00:55,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:00:55,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:00:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:55,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 11:00:55,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:55,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 11:00:55,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:55,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 11:00:55,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:55,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:00:55,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:00:55,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554125313] [2022-07-19 11:00:55,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554125313] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:00:55,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:00:55,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-19 11:00:55,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336011039] [2022-07-19 11:00:55,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:00:55,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 11:00:55,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:00:55,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 11:00:55,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-19 11:00:55,775 INFO L87 Difference]: Start difference. First operand 6629 states and 10199 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 11:01:00,820 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:02,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:01:02,563 INFO L93 Difference]: Finished difference Result 7477 states and 11670 transitions. [2022-07-19 11:01:02,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 11:01:02,564 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 65 [2022-07-19 11:01:02,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:01:02,590 INFO L225 Difference]: With dead ends: 7477 [2022-07-19 11:01:02,591 INFO L226 Difference]: Without dead ends: 7459 [2022-07-19 11:01:02,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-07-19 11:01:02,597 INFO L413 NwaCegarLoop]: 658 mSDtfsCounter, 861 mSDsluCounter, 3120 mSDsCounter, 0 mSdLazyCounter, 2503 mSolverCounterSat, 372 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 3778 SdHoareTripleChecker+Invalid, 2876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 2503 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-07-19 11:01:02,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [885 Valid, 3778 Invalid, 2876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 2503 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2022-07-19 11:01:02,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7459 states. [2022-07-19 11:01:03,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7459 to 6625. [2022-07-19 11:01:03,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6625 states, 5598 states have (on average 1.476777420507324) internal successors, (8267), 5823 states have internal predecessors, (8267), 743 states have call successors, (743), 227 states have call predecessors, (743), 283 states have return successors, (1183), 604 states have call predecessors, (1183), 722 states have call successors, (1183) [2022-07-19 11:01:03,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6625 states to 6625 states and 10193 transitions. [2022-07-19 11:01:03,132 INFO L78 Accepts]: Start accepts. Automaton has 6625 states and 10193 transitions. Word has length 65 [2022-07-19 11:01:03,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:01:03,132 INFO L495 AbstractCegarLoop]: Abstraction has 6625 states and 10193 transitions. [2022-07-19 11:01:03,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 11:01:03,132 INFO L276 IsEmpty]: Start isEmpty. Operand 6625 states and 10193 transitions. [2022-07-19 11:01:03,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 11:01:03,134 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:01:03,134 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:01:03,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-19 11:01:03,135 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:01:03,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:01:03,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1869722635, now seen corresponding path program 1 times [2022-07-19 11:01:03,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:01:03,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573354695] [2022-07-19 11:01:03,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:01:03,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:01:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:03,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 11:01:03,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:03,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 11:01:03,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:03,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-19 11:01:03,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:03,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 11:01:03,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:03,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:01:03,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:01:03,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573354695] [2022-07-19 11:01:03,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573354695] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:01:03,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:01:03,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 11:01:03,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045232231] [2022-07-19 11:01:03,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:01:03,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 11:01:03,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:01:03,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 11:01:03,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-19 11:01:03,375 INFO L87 Difference]: Start difference. First operand 6625 states and 10193 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 11:01:07,518 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:08,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:01:08,832 INFO L93 Difference]: Finished difference Result 10441 states and 16350 transitions. [2022-07-19 11:01:08,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 11:01:08,832 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-07-19 11:01:08,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:01:08,855 INFO L225 Difference]: With dead ends: 10441 [2022-07-19 11:01:08,856 INFO L226 Difference]: Without dead ends: 7793 [2022-07-19 11:01:08,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-07-19 11:01:08,870 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 909 mSDsluCounter, 1322 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 406 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 931 SdHoareTripleChecker+Valid, 1969 SdHoareTripleChecker+Invalid, 1568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-07-19 11:01:08,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [931 Valid, 1969 Invalid, 1568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 1161 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2022-07-19 11:01:08,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7793 states. [2022-07-19 11:01:09,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7793 to 6847. [2022-07-19 11:01:09,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6847 states, 5810 states have (on average 1.4731497418244406) internal successors, (8559), 6043 states have internal predecessors, (8559), 743 states have call successors, (743), 227 states have call predecessors, (743), 293 states have return successors, (1198), 606 states have call predecessors, (1198), 722 states have call successors, (1198) [2022-07-19 11:01:09,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6847 states to 6847 states and 10500 transitions. [2022-07-19 11:01:09,286 INFO L78 Accepts]: Start accepts. Automaton has 6847 states and 10500 transitions. Word has length 67 [2022-07-19 11:01:09,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:01:09,286 INFO L495 AbstractCegarLoop]: Abstraction has 6847 states and 10500 transitions. [2022-07-19 11:01:09,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 11:01:09,286 INFO L276 IsEmpty]: Start isEmpty. Operand 6847 states and 10500 transitions. [2022-07-19 11:01:09,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-19 11:01:09,288 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:01:09,288 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:01:09,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-19 11:01:09,289 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:01:09,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:01:09,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1466440038, now seen corresponding path program 1 times [2022-07-19 11:01:09,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:01:09,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075061339] [2022-07-19 11:01:09,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:01:09,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:01:09,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:09,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 11:01:09,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:09,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 11:01:09,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:09,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 11:01:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:09,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-19 11:01:09,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:09,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-19 11:01:09,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:09,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:01:09,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:01:09,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075061339] [2022-07-19 11:01:09,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075061339] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:01:09,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:01:09,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 11:01:09,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595984778] [2022-07-19 11:01:09,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:01:09,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 11:01:09,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:01:09,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 11:01:09,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 11:01:09,526 INFO L87 Difference]: Start difference. First operand 6847 states and 10500 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 11:01:13,250 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:16,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:01:16,568 INFO L93 Difference]: Finished difference Result 9490 states and 14566 transitions. [2022-07-19 11:01:16,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 11:01:16,569 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2022-07-19 11:01:16,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:01:16,584 INFO L225 Difference]: With dead ends: 9490 [2022-07-19 11:01:16,584 INFO L226 Difference]: Without dead ends: 5437 [2022-07-19 11:01:16,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2022-07-19 11:01:16,596 INFO L413 NwaCegarLoop]: 990 mSDtfsCounter, 2801 mSDsluCounter, 1946 mSDsCounter, 0 mSdLazyCounter, 1932 mSolverCounterSat, 903 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2860 SdHoareTripleChecker+Valid, 2936 SdHoareTripleChecker+Invalid, 2836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 903 IncrementalHoareTripleChecker+Valid, 1932 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-07-19 11:01:16,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2860 Valid, 2936 Invalid, 2836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [903 Valid, 1932 Invalid, 1 Unknown, 0 Unchecked, 6.3s Time] [2022-07-19 11:01:16,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5437 states. [2022-07-19 11:01:16,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5437 to 4456. [2022-07-19 11:01:16,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4456 states, 3785 states have (on average 1.4544253632760897) internal successors, (5505), 3908 states have internal predecessors, (5505), 466 states have call successors, (466), 162 states have call predecessors, (466), 204 states have return successors, (652), 401 states have call predecessors, (652), 449 states have call successors, (652) [2022-07-19 11:01:16,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4456 states to 4456 states and 6623 transitions. [2022-07-19 11:01:16,874 INFO L78 Accepts]: Start accepts. Automaton has 4456 states and 6623 transitions. Word has length 69 [2022-07-19 11:01:16,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:01:16,875 INFO L495 AbstractCegarLoop]: Abstraction has 4456 states and 6623 transitions. [2022-07-19 11:01:16,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 11:01:16,875 INFO L276 IsEmpty]: Start isEmpty. Operand 4456 states and 6623 transitions. [2022-07-19 11:01:16,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-19 11:01:16,876 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:01:16,876 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:01:16,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-19 11:01:16,877 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:01:16,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:01:16,877 INFO L85 PathProgramCache]: Analyzing trace with hash -677342089, now seen corresponding path program 1 times [2022-07-19 11:01:16,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:01:16,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150949692] [2022-07-19 11:01:16,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:01:16,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:01:16,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:17,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 11:01:17,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:17,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 11:01:17,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:17,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-19 11:01:17,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:17,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 11:01:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:17,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:01:17,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:01:17,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150949692] [2022-07-19 11:01:17,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150949692] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:01:17,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:01:17,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 11:01:17,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757482441] [2022-07-19 11:01:17,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:01:17,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 11:01:17,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:01:17,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 11:01:17,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-19 11:01:17,122 INFO L87 Difference]: Start difference. First operand 4456 states and 6623 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 11:01:21,856 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:23,888 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:25,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:01:25,207 INFO L93 Difference]: Finished difference Result 7882 states and 11879 transitions. [2022-07-19 11:01:25,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 11:01:25,207 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 68 [2022-07-19 11:01:25,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:01:25,218 INFO L225 Difference]: With dead ends: 7882 [2022-07-19 11:01:25,219 INFO L226 Difference]: Without dead ends: 5395 [2022-07-19 11:01:25,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-07-19 11:01:25,224 INFO L413 NwaCegarLoop]: 656 mSDtfsCounter, 793 mSDsluCounter, 1604 mSDsCounter, 0 mSdLazyCounter, 1567 mSolverCounterSat, 187 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 816 SdHoareTripleChecker+Valid, 2260 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1567 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:01:25,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [816 Valid, 2260 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1567 Invalid, 2 Unknown, 0 Unchecked, 7.5s Time] [2022-07-19 11:01:25,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5395 states. [2022-07-19 11:01:25,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5395 to 4432. [2022-07-19 11:01:25,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4432 states, 3761 states have (on average 1.4557298590800318) internal successors, (5475), 3884 states have internal predecessors, (5475), 466 states have call successors, (466), 162 states have call predecessors, (466), 204 states have return successors, (652), 401 states have call predecessors, (652), 449 states have call successors, (652) [2022-07-19 11:01:25,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4432 states to 4432 states and 6593 transitions. [2022-07-19 11:01:25,499 INFO L78 Accepts]: Start accepts. Automaton has 4432 states and 6593 transitions. Word has length 68 [2022-07-19 11:01:25,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:01:25,499 INFO L495 AbstractCegarLoop]: Abstraction has 4432 states and 6593 transitions. [2022-07-19 11:01:25,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 11:01:25,499 INFO L276 IsEmpty]: Start isEmpty. Operand 4432 states and 6593 transitions. [2022-07-19 11:01:25,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-19 11:01:25,501 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:01:25,501 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:01:25,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-19 11:01:25,502 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:01:25,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:01:25,502 INFO L85 PathProgramCache]: Analyzing trace with hash -554272668, now seen corresponding path program 1 times [2022-07-19 11:01:25,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:01:25,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152475642] [2022-07-19 11:01:25,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:01:25,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:01:25,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:25,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 11:01:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:25,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 11:01:25,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:25,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 11:01:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:25,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-19 11:01:25,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:25,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 11:01:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:25,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-19 11:01:25,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:25,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:01:25,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:01:25,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152475642] [2022-07-19 11:01:25,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152475642] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:01:25,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:01:25,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 11:01:25,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486801087] [2022-07-19 11:01:25,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:01:25,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 11:01:25,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:01:25,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 11:01:25,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 11:01:25,733 INFO L87 Difference]: Start difference. First operand 4432 states and 6593 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-19 11:01:29,442 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:30,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:01:30,840 INFO L93 Difference]: Finished difference Result 7928 states and 11993 transitions. [2022-07-19 11:01:30,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 11:01:30,844 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 71 [2022-07-19 11:01:30,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:01:30,862 INFO L225 Difference]: With dead ends: 7928 [2022-07-19 11:01:30,863 INFO L226 Difference]: Without dead ends: 5377 [2022-07-19 11:01:30,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2022-07-19 11:01:30,871 INFO L413 NwaCegarLoop]: 639 mSDtfsCounter, 1397 mSDsluCounter, 1585 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 611 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1407 SdHoareTripleChecker+Valid, 2224 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 611 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-07-19 11:01:30,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1407 Valid, 2224 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [611 Valid, 1262 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2022-07-19 11:01:30,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5377 states. [2022-07-19 11:01:31,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5377 to 4423. [2022-07-19 11:01:31,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4423 states, 3755 states have (on average 1.4561917443408787) internal successors, (5468), 3877 states have internal predecessors, (5468), 464 states have call successors, (464), 161 states have call predecessors, (464), 203 states have return successors, (638), 399 states have call predecessors, (638), 447 states have call successors, (638) [2022-07-19 11:01:31,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4423 states to 4423 states and 6570 transitions. [2022-07-19 11:01:31,162 INFO L78 Accepts]: Start accepts. Automaton has 4423 states and 6570 transitions. Word has length 71 [2022-07-19 11:01:31,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:01:31,163 INFO L495 AbstractCegarLoop]: Abstraction has 4423 states and 6570 transitions. [2022-07-19 11:01:31,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-19 11:01:31,163 INFO L276 IsEmpty]: Start isEmpty. Operand 4423 states and 6570 transitions. [2022-07-19 11:01:31,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-19 11:01:31,164 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:01:31,164 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:01:31,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-19 11:01:31,165 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:01:31,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:01:31,165 INFO L85 PathProgramCache]: Analyzing trace with hash 827121083, now seen corresponding path program 1 times [2022-07-19 11:01:31,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:01:31,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498994469] [2022-07-19 11:01:31,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:01:31,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:01:31,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:31,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 11:01:31,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:31,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 11:01:31,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:31,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 11:01:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:31,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-19 11:01:31,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:31,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:01:31,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:01:31,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498994469] [2022-07-19 11:01:31,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498994469] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:01:31,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:01:31,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 11:01:31,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783254926] [2022-07-19 11:01:31,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:01:31,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 11:01:31,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:01:31,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 11:01:31,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-19 11:01:31,472 INFO L87 Difference]: Start difference. First operand 4423 states and 6570 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 11:01:36,180 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:37,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:01:37,474 INFO L93 Difference]: Finished difference Result 5300 states and 8024 transitions. [2022-07-19 11:01:37,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 11:01:37,475 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 68 [2022-07-19 11:01:37,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:01:37,484 INFO L225 Difference]: With dead ends: 5300 [2022-07-19 11:01:37,485 INFO L226 Difference]: Without dead ends: 5280 [2022-07-19 11:01:37,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-07-19 11:01:37,487 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 947 mSDsluCounter, 2337 mSDsCounter, 0 mSdLazyCounter, 1691 mSolverCounterSat, 467 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 2997 SdHoareTripleChecker+Invalid, 2159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 467 IncrementalHoareTripleChecker+Valid, 1691 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-07-19 11:01:37,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [970 Valid, 2997 Invalid, 2159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [467 Valid, 1691 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2022-07-19 11:01:37,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5280 states. [2022-07-19 11:01:37,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5280 to 4422. [2022-07-19 11:01:37,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4422 states, 3755 states have (on average 1.455925432756325) internal successors, (5467), 3876 states have internal predecessors, (5467), 463 states have call successors, (463), 161 states have call predecessors, (463), 203 states have return successors, (637), 399 states have call predecessors, (637), 446 states have call successors, (637) [2022-07-19 11:01:37,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4422 states to 4422 states and 6567 transitions. [2022-07-19 11:01:37,762 INFO L78 Accepts]: Start accepts. Automaton has 4422 states and 6567 transitions. Word has length 68 [2022-07-19 11:01:37,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:01:37,762 INFO L495 AbstractCegarLoop]: Abstraction has 4422 states and 6567 transitions. [2022-07-19 11:01:37,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 11:01:37,762 INFO L276 IsEmpty]: Start isEmpty. Operand 4422 states and 6567 transitions. [2022-07-19 11:01:37,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-19 11:01:37,763 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:01:37,764 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:01:37,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-19 11:01:37,764 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:01:37,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:01:37,764 INFO L85 PathProgramCache]: Analyzing trace with hash 463590116, now seen corresponding path program 1 times [2022-07-19 11:01:37,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:01:37,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973148888] [2022-07-19 11:01:37,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:01:37,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:01:37,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:37,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 11:01:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:37,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 11:01:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:37,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-19 11:01:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:38,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 11:01:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:38,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:01:38,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:01:38,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973148888] [2022-07-19 11:01:38,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973148888] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:01:38,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:01:38,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-19 11:01:38,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934731400] [2022-07-19 11:01:38,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:01:38,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 11:01:38,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:01:38,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 11:01:38,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-19 11:01:38,088 INFO L87 Difference]: Start difference. First operand 4422 states and 6567 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 11:01:42,789 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:44,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:01:44,175 INFO L93 Difference]: Finished difference Result 5362 states and 8158 transitions. [2022-07-19 11:01:44,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 11:01:44,175 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-07-19 11:01:44,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:01:44,186 INFO L225 Difference]: With dead ends: 5362 [2022-07-19 11:01:44,186 INFO L226 Difference]: Without dead ends: 5346 [2022-07-19 11:01:44,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-07-19 11:01:44,188 INFO L413 NwaCegarLoop]: 651 mSDtfsCounter, 959 mSDsluCounter, 2754 mSDsCounter, 0 mSdLazyCounter, 2101 mSolverCounterSat, 479 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 3405 SdHoareTripleChecker+Invalid, 2581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 2101 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:01:44,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [983 Valid, 3405 Invalid, 2581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 2101 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2022-07-19 11:01:44,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5346 states. [2022-07-19 11:01:44,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5346 to 4427. [2022-07-19 11:01:44,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4427 states, 3758 states have (on average 1.456093666844066) internal successors, (5472), 3880 states have internal predecessors, (5472), 465 states have call successors, (465), 161 states have call predecessors, (465), 203 states have return successors, (639), 400 states have call predecessors, (639), 448 states have call successors, (639) [2022-07-19 11:01:44,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4427 states to 4427 states and 6576 transitions. [2022-07-19 11:01:44,472 INFO L78 Accepts]: Start accepts. Automaton has 4427 states and 6576 transitions. Word has length 69 [2022-07-19 11:01:44,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:01:44,472 INFO L495 AbstractCegarLoop]: Abstraction has 4427 states and 6576 transitions. [2022-07-19 11:01:44,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 11:01:44,472 INFO L276 IsEmpty]: Start isEmpty. Operand 4427 states and 6576 transitions. [2022-07-19 11:01:44,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-19 11:01:44,474 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:01:44,474 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:01:44,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-19 11:01:44,474 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:01:44,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:01:44,474 INFO L85 PathProgramCache]: Analyzing trace with hash -669900528, now seen corresponding path program 1 times [2022-07-19 11:01:44,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:01:44,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290651675] [2022-07-19 11:01:44,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:01:44,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:01:44,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:44,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 11:01:44,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:44,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 11:01:44,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:44,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-19 11:01:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:44,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 11:01:44,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:44,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:01:44,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:01:44,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290651675] [2022-07-19 11:01:44,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290651675] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:01:44,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:01:44,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 11:01:44,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347123596] [2022-07-19 11:01:44,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:01:44,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 11:01:44,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:01:44,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 11:01:44,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-19 11:01:44,786 INFO L87 Difference]: Start difference. First operand 4427 states and 6576 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-19 11:01:49,022 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []