./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/cdaudio.i.cil-2.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 158aa30053f80b6c80bcbeac6f52ce0f8b5c03af85b763fe7e9897c790504a73 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 21:56:14,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 21:56:14,527 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 21:56:14,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 21:56:14,559 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 21:56:14,562 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 21:56:14,563 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 21:56:14,567 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 21:56:14,569 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 21:56:14,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 21:56:14,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 21:56:14,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 21:56:14,578 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 21:56:14,579 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 21:56:14,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 21:56:14,583 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 21:56:14,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 21:56:14,584 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 21:56:14,586 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 21:56:14,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 21:56:14,591 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 21:56:14,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 21:56:14,592 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 21:56:14,594 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 21:56:14,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 21:56:14,595 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 21:56:14,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 21:56:14,604 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 21:56:14,604 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 21:56:14,605 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 21:56:14,605 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 21:56:14,605 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 21:56:14,606 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 21:56:14,606 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 21:56:14,607 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 21:56:14,607 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 21:56:14,608 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 21:56:14,608 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 21:56:14,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 21:56:14,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 21:56:14,610 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 21:56:14,610 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 21:56:14,637 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 21:56:14,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 21:56:14,638 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 21:56:14,638 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 21:56:14,639 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 21:56:14,639 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 21:56:14,640 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 21:56:14,640 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 21:56:14,640 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 21:56:14,640 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 21:56:14,641 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 21:56:14,641 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 21:56:14,641 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 21:56:14,641 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 21:56:14,641 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 21:56:14,641 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 21:56:14,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 21:56:14,642 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 21:56:14,642 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 21:56:14,642 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 21:56:14,642 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 21:56:14,642 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 21:56:14,643 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 21:56:14,643 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 21:56:14,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:56:14,643 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 21:56:14,643 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 21:56:14,643 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 21:56:14,644 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 21:56:14,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 21:56:14,644 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 21:56:14,644 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 21:56:14,644 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 21:56:14,644 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 158aa30053f80b6c80bcbeac6f52ce0f8b5c03af85b763fe7e9897c790504a73 [2021-12-27 21:56:14,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 21:56:14,911 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 21:56:14,913 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 21:56:14,914 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 21:56:14,916 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 21:56:14,917 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-2.c [2021-12-27 21:56:14,965 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ed6bec37/432b7df884ff497faae99f4b10cde7c1/FLAG8b020007d [2021-12-27 21:56:15,591 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 21:56:15,591 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/cdaudio.i.cil-2.c [2021-12-27 21:56:15,630 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ed6bec37/432b7df884ff497faae99f4b10cde7c1/FLAG8b020007d [2021-12-27 21:56:16,000 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ed6bec37/432b7df884ff497faae99f4b10cde7c1 [2021-12-27 21:56:16,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 21:56:16,004 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 21:56:16,004 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 21:56:16,004 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 21:56:16,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 21:56:16,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:56:16" (1/1) ... [2021-12-27 21:56:16,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b37d6c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:16, skipping insertion in model container [2021-12-27 21:56:16,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:56:16" (1/1) ... [2021-12-27 21:56:16,012 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 21:56:16,084 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 21:56:16,481 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/cdaudio.i.cil-2.c[90200,90213] [2021-12-27 21:56:16,916 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:56:16,922 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 21:56:16,988 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/cdaudio.i.cil-2.c[90200,90213] [2021-12-27 21:56:17,205 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:56:17,232 INFO L208 MainTranslator]: Completed translation [2021-12-27 21:56:17,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:17 WrapperNode [2021-12-27 21:56:17,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 21:56:17,235 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 21:56:17,235 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 21:56:17,235 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 21:56:17,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:17" (1/1) ... [2021-12-27 21:56:17,309 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:17" (1/1) ... [2021-12-27 21:56:17,392 INFO L137 Inliner]: procedures = 121, calls = 2189, calls flagged for inlining = 23, calls inlined = 19, statements flattened = 2294 [2021-12-27 21:56:17,393 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 21:56:17,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 21:56:17,394 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 21:56:17,394 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 21:56:17,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:17" (1/1) ... [2021-12-27 21:56:17,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:17" (1/1) ... [2021-12-27 21:56:17,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:17" (1/1) ... [2021-12-27 21:56:17,427 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:17" (1/1) ... [2021-12-27 21:56:17,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:17" (1/1) ... [2021-12-27 21:56:17,514 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:17" (1/1) ... [2021-12-27 21:56:17,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:17" (1/1) ... [2021-12-27 21:56:17,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 21:56:17,566 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 21:56:17,566 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 21:56:17,566 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 21:56:17,567 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:17" (1/1) ... [2021-12-27 21:56:17,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:56:17,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:56:17,589 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-27 21:56:17,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-27 21:56:17,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-27 21:56:17,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-27 21:56:17,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-27 21:56:17,619 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-27 21:56:17,619 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2021-12-27 21:56:17,619 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2021-12-27 21:56:17,619 INFO L130 BoogieDeclarations]: Found specification of procedure MmLockPagableDataSection [2021-12-27 21:56:17,619 INFO L138 BoogieDeclarations]: Found implementation of procedure MmLockPagableDataSection [2021-12-27 21:56:17,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-27 21:56:17,619 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2021-12-27 21:56:17,619 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2021-12-27 21:56:17,620 INFO L130 BoogieDeclarations]: Found specification of procedure IoOpenDeviceRegistryKey [2021-12-27 21:56:17,620 INFO L138 BoogieDeclarations]: Found implementation of procedure IoOpenDeviceRegistryKey [2021-12-27 21:56:17,620 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2021-12-27 21:56:17,620 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2021-12-27 21:56:17,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-27 21:56:17,620 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-27 21:56:17,620 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_malloc [2021-12-27 21:56:17,620 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_malloc [2021-12-27 21:56:17,620 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2021-12-27 21:56:17,621 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2021-12-27 21:56:17,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-27 21:56:17,621 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2021-12-27 21:56:17,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2021-12-27 21:56:17,621 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2021-12-27 21:56:17,621 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2021-12-27 21:56:17,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 21:56:17,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-27 21:56:17,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-27 21:56:17,622 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2021-12-27 21:56:17,622 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2021-12-27 21:56:17,622 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-27 21:56:17,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-27 21:56:17,622 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2021-12-27 21:56:17,622 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2021-12-27 21:56:17,622 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2021-12-27 21:56:17,623 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2021-12-27 21:56:17,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-27 21:56:17,623 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2021-12-27 21:56:17,623 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2021-12-27 21:56:17,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2021-12-27 21:56:17,623 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2021-12-27 21:56:17,623 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2021-12-27 21:56:17,623 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2021-12-27 21:56:17,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 21:56:17,624 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2021-12-27 21:56:17,624 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2021-12-27 21:56:17,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-27 21:56:17,624 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2021-12-27 21:56:17,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2021-12-27 21:56:17,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 21:56:17,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 21:56:17,625 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2021-12-27 21:56:17,625 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2021-12-27 21:56:17,955 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 21:56:17,957 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 21:56:18,075 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-27 21:56:18,085 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2021-12-27 21:56:18,086 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2021-12-27 21:56:18,434 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-27 21:56:18,458 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2021-12-27 21:56:18,458 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2021-12-27 21:56:18,478 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-27 21:56:18,478 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-27 21:56:18,479 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-27 21:56:18,484 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-27 21:56:18,489 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-27 21:56:18,518 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-27 21:56:29,159 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##258: assume false; [2021-12-27 21:56:29,160 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##259: assume !false; [2021-12-27 21:56:29,160 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##485: assume false; [2021-12-27 21:56:29,160 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##486: assume !false; [2021-12-27 21:56:29,160 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L3709: CdAudioPnp_#res#1 := 0; [2021-12-27 21:56:29,160 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume !false; [2021-12-27 21:56:29,160 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##46: assume false; [2021-12-27 21:56:29,160 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##25: assume !false; [2021-12-27 21:56:29,160 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume false; [2021-12-27 21:56:29,160 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2021-12-27 21:56:29,160 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##154: assume !false; [2021-12-27 21:56:29,160 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##153: assume false; [2021-12-27 21:56:29,160 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2021-12-27 21:56:29,183 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-27 21:56:29,186 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2021-12-27 21:56:29,187 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2021-12-27 21:56:29,204 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 21:56:29,219 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 21:56:29,219 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-27 21:56:29,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:56:29 BoogieIcfgContainer [2021-12-27 21:56:29,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 21:56:29,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 21:56:29,224 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 21:56:29,226 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 21:56:29,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 09:56:16" (1/3) ... [2021-12-27 21:56:29,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e9f13b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:56:29, skipping insertion in model container [2021-12-27 21:56:29,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:17" (2/3) ... [2021-12-27 21:56:29,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e9f13b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:56:29, skipping insertion in model container [2021-12-27 21:56:29,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:56:29" (3/3) ... [2021-12-27 21:56:29,229 INFO L111 eAbstractionObserver]: Analyzing ICFG cdaudio.i.cil-2.c [2021-12-27 21:56:29,233 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 21:56:29,233 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 21:56:29,270 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 21:56:29,278 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-27 21:56:29,278 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 21:56:29,309 INFO L276 IsEmpty]: Start isEmpty. Operand has 609 states, 475 states have (on average 1.5178947368421052) internal successors, (721), 494 states have internal predecessors, (721), 113 states have call successors, (113), 19 states have call predecessors, (113), 19 states have return successors, (113), 108 states have call predecessors, (113), 113 states have call successors, (113) [2021-12-27 21:56:29,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-27 21:56:29,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:29,313 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:56:29,314 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:29,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:29,317 INFO L85 PathProgramCache]: Analyzing trace with hash -969455066, now seen corresponding path program 1 times [2021-12-27 21:56:29,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:29,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950564876] [2021-12-27 21:56:29,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:29,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:29,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:29,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:29,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:29,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950564876] [2021-12-27 21:56:29,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950564876] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:29,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:29,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:29,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300263099] [2021-12-27 21:56:29,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:29,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:29,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:29,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:29,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:29,549 INFO L87 Difference]: Start difference. First operand has 609 states, 475 states have (on average 1.5178947368421052) internal successors, (721), 494 states have internal predecessors, (721), 113 states have call successors, (113), 19 states have call predecessors, (113), 19 states have return successors, (113), 108 states have call predecessors, (113), 113 states have call successors, (113) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:29,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:29,653 INFO L93 Difference]: Finished difference Result 1078 states and 1705 transitions. [2021-12-27 21:56:29,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:29,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-27 21:56:29,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:29,667 INFO L225 Difference]: With dead ends: 1078 [2021-12-27 21:56:29,668 INFO L226 Difference]: Without dead ends: 602 [2021-12-27 21:56:29,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:29,675 INFO L933 BasicCegarLoop]: 918 mSDtfsCounter, 8 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1787 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:29,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 1787 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:29,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-12-27 21:56:29,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 602. [2021-12-27 21:56:29,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 470 states have (on average 1.4872340425531916) internal successors, (699), 487 states have internal predecessors, (699), 113 states have call successors, (113), 19 states have call predecessors, (113), 18 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2021-12-27 21:56:29,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 909 transitions. [2021-12-27 21:56:29,766 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 909 transitions. Word has length 13 [2021-12-27 21:56:29,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:29,766 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 909 transitions. [2021-12-27 21:56:29,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:29,767 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 909 transitions. [2021-12-27 21:56:29,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-27 21:56:29,769 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:29,769 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:56:29,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-27 21:56:29,770 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:29,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:29,773 INFO L85 PathProgramCache]: Analyzing trace with hash 55674269, now seen corresponding path program 1 times [2021-12-27 21:56:29,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:29,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277745416] [2021-12-27 21:56:29,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:29,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:29,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:29,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:29,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277745416] [2021-12-27 21:56:29,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277745416] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:29,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:29,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:29,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33380178] [2021-12-27 21:56:29,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:29,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:29,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:29,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:29,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:29,914 INFO L87 Difference]: Start difference. First operand 602 states and 909 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:30,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:30,076 INFO L93 Difference]: Finished difference Result 1117 states and 1672 transitions. [2021-12-27 21:56:30,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:30,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-27 21:56:30,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:30,084 INFO L225 Difference]: With dead ends: 1117 [2021-12-27 21:56:30,084 INFO L226 Difference]: Without dead ends: 875 [2021-12-27 21:56:30,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:30,087 INFO L933 BasicCegarLoop]: 1230 mSDtfsCounter, 823 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:30,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [823 Valid, 1645 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:56:30,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-12-27 21:56:30,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 855. [2021-12-27 21:56:30,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 680 states have (on average 1.4661764705882352) internal successors, (997), 683 states have internal predecessors, (997), 142 states have call successors, (142), 33 states have call predecessors, (142), 32 states have return successors, (146), 140 states have call predecessors, (146), 130 states have call successors, (146) [2021-12-27 21:56:30,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1285 transitions. [2021-12-27 21:56:30,138 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1285 transitions. Word has length 15 [2021-12-27 21:56:30,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:30,138 INFO L470 AbstractCegarLoop]: Abstraction has 855 states and 1285 transitions. [2021-12-27 21:56:30,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:30,139 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1285 transitions. [2021-12-27 21:56:30,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-27 21:56:30,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:30,140 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:56:30,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-27 21:56:30,141 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:30,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:30,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1471184401, now seen corresponding path program 1 times [2021-12-27 21:56:30,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:30,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873623127] [2021-12-27 21:56:30,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:30,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:30,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:30,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:30,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:30,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873623127] [2021-12-27 21:56:30,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873623127] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:30,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:30,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:30,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22027526] [2021-12-27 21:56:30,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:30,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:30,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:30,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:30,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:30,192 INFO L87 Difference]: Start difference. First operand 855 states and 1285 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:30,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:30,306 INFO L93 Difference]: Finished difference Result 1817 states and 2794 transitions. [2021-12-27 21:56:30,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:30,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-27 21:56:30,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:30,313 INFO L225 Difference]: With dead ends: 1817 [2021-12-27 21:56:30,313 INFO L226 Difference]: Without dead ends: 1421 [2021-12-27 21:56:30,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:30,316 INFO L933 BasicCegarLoop]: 1412 mSDtfsCounter, 576 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 2267 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:30,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [576 Valid, 2267 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:56:30,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2021-12-27 21:56:30,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 1018. [2021-12-27 21:56:30,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 801 states have (on average 1.4544319600499376) internal successors, (1165), 803 states have internal predecessors, (1165), 170 states have call successors, (170), 46 states have call predecessors, (170), 46 states have return successors, (217), 170 states have call predecessors, (217), 158 states have call successors, (217) [2021-12-27 21:56:30,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1552 transitions. [2021-12-27 21:56:30,359 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1552 transitions. Word has length 22 [2021-12-27 21:56:30,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:30,360 INFO L470 AbstractCegarLoop]: Abstraction has 1018 states and 1552 transitions. [2021-12-27 21:56:30,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:30,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1552 transitions. [2021-12-27 21:56:30,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-27 21:56:30,364 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:30,364 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:56:30,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-27 21:56:30,364 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:30,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:30,366 INFO L85 PathProgramCache]: Analyzing trace with hash 696545090, now seen corresponding path program 1 times [2021-12-27 21:56:30,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:30,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195677722] [2021-12-27 21:56:30,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:30,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:30,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:30,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:30,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195677722] [2021-12-27 21:56:30,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195677722] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:30,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:30,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:30,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853541433] [2021-12-27 21:56:30,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:30,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:30,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:30,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:30,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:30,487 INFO L87 Difference]: Start difference. First operand 1018 states and 1552 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:30,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:30,535 INFO L93 Difference]: Finished difference Result 1664 states and 2490 transitions. [2021-12-27 21:56:30,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:30,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-27 21:56:30,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:30,542 INFO L225 Difference]: With dead ends: 1664 [2021-12-27 21:56:30,542 INFO L226 Difference]: Without dead ends: 1531 [2021-12-27 21:56:30,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:30,550 INFO L933 BasicCegarLoop]: 1143 mSDtfsCounter, 826 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 1542 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:30,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 1542 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:30,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2021-12-27 21:56:30,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 1469. [2021-12-27 21:56:30,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1469 states, 1165 states have (on average 1.4583690987124462) internal successors, (1699), 1163 states have internal predecessors, (1699), 227 states have call successors, (227), 72 states have call predecessors, (227), 76 states have return successors, (298), 233 states have call predecessors, (298), 218 states have call successors, (298) [2021-12-27 21:56:30,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 2224 transitions. [2021-12-27 21:56:30,599 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 2224 transitions. Word has length 22 [2021-12-27 21:56:30,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:30,599 INFO L470 AbstractCegarLoop]: Abstraction has 1469 states and 2224 transitions. [2021-12-27 21:56:30,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:30,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 2224 transitions. [2021-12-27 21:56:30,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-27 21:56:30,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:30,600 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:56:30,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-27 21:56:30,600 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:30,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:30,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1398900519, now seen corresponding path program 1 times [2021-12-27 21:56:30,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:30,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046246058] [2021-12-27 21:56:30,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:30,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:30,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:30,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:30,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:30,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046246058] [2021-12-27 21:56:30,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046246058] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:30,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:30,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-27 21:56:30,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847228454] [2021-12-27 21:56:30,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:30,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 21:56:30,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:30,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 21:56:30,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-27 21:56:30,661 INFO L87 Difference]: Start difference. First operand 1469 states and 2224 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:31,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:31,167 INFO L93 Difference]: Finished difference Result 2648 states and 4038 transitions. [2021-12-27 21:56:31,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 21:56:31,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-27 21:56:31,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:31,174 INFO L225 Difference]: With dead ends: 2648 [2021-12-27 21:56:31,174 INFO L226 Difference]: Without dead ends: 1768 [2021-12-27 21:56:31,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:56:31,177 INFO L933 BasicCegarLoop]: 1155 mSDtfsCounter, 1409 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1411 SdHoareTripleChecker+Valid, 1444 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:31,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1411 Valid, 1444 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-27 21:56:31,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2021-12-27 21:56:31,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1457. [2021-12-27 21:56:31,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1155 states have (on average 1.4554112554112555) internal successors, (1681), 1153 states have internal predecessors, (1681), 225 states have call successors, (225), 70 states have call predecessors, (225), 76 states have return successors, (294), 233 states have call predecessors, (294), 216 states have call successors, (294) [2021-12-27 21:56:31,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 2200 transitions. [2021-12-27 21:56:31,219 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 2200 transitions. Word has length 23 [2021-12-27 21:56:31,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:31,220 INFO L470 AbstractCegarLoop]: Abstraction has 1457 states and 2200 transitions. [2021-12-27 21:56:31,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:31,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 2200 transitions. [2021-12-27 21:56:31,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-27 21:56:31,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:31,221 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:56:31,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-27 21:56:31,221 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:31,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:31,222 INFO L85 PathProgramCache]: Analyzing trace with hash -579948273, now seen corresponding path program 1 times [2021-12-27 21:56:31,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:31,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786413554] [2021-12-27 21:56:31,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:31,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:31,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:31,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:31,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:31,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786413554] [2021-12-27 21:56:31,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786413554] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:31,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:31,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:31,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971862441] [2021-12-27 21:56:31,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:31,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:31,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:31,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:31,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:31,271 INFO L87 Difference]: Start difference. First operand 1457 states and 2200 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:31,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:31,341 INFO L93 Difference]: Finished difference Result 1460 states and 2202 transitions. [2021-12-27 21:56:31,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:31,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-27 21:56:31,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:31,347 INFO L225 Difference]: With dead ends: 1460 [2021-12-27 21:56:31,348 INFO L226 Difference]: Without dead ends: 1456 [2021-12-27 21:56:31,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:31,349 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 22 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1691 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:31,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 1691 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:31,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2021-12-27 21:56:31,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1456. [2021-12-27 21:56:31,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1155 states have (on average 1.4536796536796537) internal successors, (1679), 1152 states have internal predecessors, (1679), 224 states have call successors, (224), 70 states have call predecessors, (224), 76 states have return successors, (294), 233 states have call predecessors, (294), 216 states have call successors, (294) [2021-12-27 21:56:31,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 2197 transitions. [2021-12-27 21:56:31,388 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 2197 transitions. Word has length 22 [2021-12-27 21:56:31,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:31,388 INFO L470 AbstractCegarLoop]: Abstraction has 1456 states and 2197 transitions. [2021-12-27 21:56:31,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:31,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 2197 transitions. [2021-12-27 21:56:31,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-27 21:56:31,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:31,390 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:56:31,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-27 21:56:31,390 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:31,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:31,391 INFO L85 PathProgramCache]: Analyzing trace with hash -550873607, now seen corresponding path program 1 times [2021-12-27 21:56:31,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:31,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389871805] [2021-12-27 21:56:31,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:31,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:31,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-27 21:56:31,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:31,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:31,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:31,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389871805] [2021-12-27 21:56:31,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389871805] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:31,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:31,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-27 21:56:31,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569311947] [2021-12-27 21:56:31,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:31,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-27 21:56:31,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:31,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-27 21:56:31,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:56:31,490 INFO L87 Difference]: Start difference. First operand 1456 states and 2197 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-27 21:56:35,915 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 21:56:38,520 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 21:56:40,573 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 21:56:42,595 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 21:56:44,018 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 21:56:46,036 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 21:56:46,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:46,100 INFO L93 Difference]: Finished difference Result 2255 states and 3351 transitions. [2021-12-27 21:56:46,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-27 21:56:46,102 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-12-27 21:56:46,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:46,107 INFO L225 Difference]: With dead ends: 2255 [2021-12-27 21:56:46,107 INFO L226 Difference]: Without dead ends: 1233 [2021-12-27 21:56:46,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-27 21:56:46,110 INFO L933 BasicCegarLoop]: 1002 mSDtfsCounter, 713 mSDsluCounter, 1568 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 275 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 2570 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:46,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [716 Valid, 2570 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 483 Invalid, 5 Unknown, 0 Unchecked, 14.5s Time] [2021-12-27 21:56:46,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-12-27 21:56:46,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1089. [2021-12-27 21:56:46,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 864 states have (on average 1.431712962962963) internal successors, (1237), 863 states have internal predecessors, (1237), 163 states have call successors, (163), 55 states have call predecessors, (163), 61 states have return successors, (215), 170 states have call predecessors, (215), 155 states have call successors, (215) [2021-12-27 21:56:46,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1615 transitions. [2021-12-27 21:56:46,141 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1615 transitions. Word has length 35 [2021-12-27 21:56:46,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:46,143 INFO L470 AbstractCegarLoop]: Abstraction has 1089 states and 1615 transitions. [2021-12-27 21:56:46,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-27 21:56:46,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1615 transitions. [2021-12-27 21:56:46,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-27 21:56:46,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:46,145 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:56:46,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-27 21:56:46,146 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:46,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:46,146 INFO L85 PathProgramCache]: Analyzing trace with hash 947230743, now seen corresponding path program 1 times [2021-12-27 21:56:46,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:46,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116902377] [2021-12-27 21:56:46,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:46,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:46,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:46,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:46,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:46,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116902377] [2021-12-27 21:56:46,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116902377] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:46,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:46,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-27 21:56:46,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198164425] [2021-12-27 21:56:46,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:46,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 21:56:46,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:46,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 21:56:46,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-27 21:56:46,207 INFO L87 Difference]: Start difference. First operand 1089 states and 1615 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:46,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:46,556 INFO L93 Difference]: Finished difference Result 1152 states and 1697 transitions. [2021-12-27 21:56:46,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 21:56:46,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-27 21:56:46,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:46,561 INFO L225 Difference]: With dead ends: 1152 [2021-12-27 21:56:46,561 INFO L226 Difference]: Without dead ends: 1107 [2021-12-27 21:56:46,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:56:46,562 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 914 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:46,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [914 Valid, 1493 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-27 21:56:46,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-12-27 21:56:46,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 1089. [2021-12-27 21:56:46,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 864 states have (on average 1.4293981481481481) internal successors, (1235), 863 states have internal predecessors, (1235), 163 states have call successors, (163), 55 states have call predecessors, (163), 61 states have return successors, (215), 170 states have call predecessors, (215), 155 states have call successors, (215) [2021-12-27 21:56:46,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1613 transitions. [2021-12-27 21:56:46,594 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1613 transitions. Word has length 31 [2021-12-27 21:56:46,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:46,594 INFO L470 AbstractCegarLoop]: Abstraction has 1089 states and 1613 transitions. [2021-12-27 21:56:46,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:46,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1613 transitions. [2021-12-27 21:56:46,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-27 21:56:46,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:46,596 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:56:46,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-27 21:56:46,597 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:46,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:46,597 INFO L85 PathProgramCache]: Analyzing trace with hash -2120850198, now seen corresponding path program 1 times [2021-12-27 21:56:46,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:46,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176328786] [2021-12-27 21:56:46,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:46,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:46,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:46,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-27 21:56:46,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:46,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:46,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176328786] [2021-12-27 21:56:46,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176328786] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:46,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:46,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-27 21:56:46,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006315465] [2021-12-27 21:56:46,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:46,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 21:56:46,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:46,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 21:56:46,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-27 21:56:46,702 INFO L87 Difference]: Start difference. First operand 1089 states and 1613 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-27 21:56:50,403 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 21:56:53,656 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 21:56:55,699 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 21:56:57,715 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 21:56:57,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:57,783 INFO L93 Difference]: Finished difference Result 1754 states and 2605 transitions. [2021-12-27 21:56:57,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 21:56:57,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-12-27 21:56:57,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:57,804 INFO L225 Difference]: With dead ends: 1754 [2021-12-27 21:56:57,804 INFO L226 Difference]: Without dead ends: 1145 [2021-12-27 21:56:57,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:56:57,807 INFO L933 BasicCegarLoop]: 850 mSDtfsCounter, 915 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 136 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:57,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [975 Valid, 1246 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 321 Invalid, 2 Unknown, 0 Unchecked, 11.0s Time] [2021-12-27 21:56:57,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-12-27 21:56:57,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 1086. [2021-12-27 21:56:57,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 862 states have (on average 1.4211136890951277) internal successors, (1225), 860 states have internal predecessors, (1225), 162 states have call successors, (162), 55 states have call predecessors, (162), 61 states have return successors, (215), 170 states have call predecessors, (215), 155 states have call successors, (215) [2021-12-27 21:56:57,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 1602 transitions. [2021-12-27 21:56:57,843 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 1602 transitions. Word has length 36 [2021-12-27 21:56:57,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:57,844 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 1602 transitions. [2021-12-27 21:56:57,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-27 21:56:57,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 1602 transitions. [2021-12-27 21:56:57,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-27 21:56:57,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:57,846 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:56:57,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-27 21:56:57,846 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:57,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:57,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1333744366, now seen corresponding path program 1 times [2021-12-27 21:56:57,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:57,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816324668] [2021-12-27 21:56:57,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:57,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:57,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:57,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:57,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816324668] [2021-12-27 21:56:57,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816324668] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:57,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:57,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:57,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299835047] [2021-12-27 21:56:57,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:57,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:57,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:57,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:57,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:57,915 INFO L87 Difference]: Start difference. First operand 1086 states and 1602 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:57,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:57,949 INFO L93 Difference]: Finished difference Result 1101 states and 1622 transitions. [2021-12-27 21:56:57,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:57,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-27 21:56:57,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:57,955 INFO L225 Difference]: With dead ends: 1101 [2021-12-27 21:56:57,955 INFO L226 Difference]: Without dead ends: 1082 [2021-12-27 21:56:57,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:57,956 INFO L933 BasicCegarLoop]: 861 mSDtfsCounter, 855 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:57,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [855 Valid, 861 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:57,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-12-27 21:56:57,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1055. [2021-12-27 21:56:57,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 834 states have (on average 1.4304556354916067) internal successors, (1193), 839 states have internal predecessors, (1193), 161 states have call successors, (161), 55 states have call predecessors, (161), 59 states have return successors, (206), 160 states have call predecessors, (206), 155 states have call successors, (206) [2021-12-27 21:56:57,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1560 transitions. [2021-12-27 21:56:57,990 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1560 transitions. Word has length 33 [2021-12-27 21:56:57,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:57,990 INFO L470 AbstractCegarLoop]: Abstraction has 1055 states and 1560 transitions. [2021-12-27 21:56:57,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:57,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1560 transitions. [2021-12-27 21:56:57,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-27 21:56:57,992 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:57,993 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:56:57,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-27 21:56:57,993 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:57,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:57,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1348089275, now seen corresponding path program 1 times [2021-12-27 21:56:57,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:57,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925119797] [2021-12-27 21:56:57,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:57,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:58,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:58,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925119797] [2021-12-27 21:56:58,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925119797] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:58,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:58,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:58,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787730976] [2021-12-27 21:56:58,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:58,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:58,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:58,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:58,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:58,050 INFO L87 Difference]: Start difference. First operand 1055 states and 1560 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:58,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:58,143 INFO L93 Difference]: Finished difference Result 1353 states and 1993 transitions. [2021-12-27 21:56:58,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:58,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-27 21:56:58,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:58,148 INFO L225 Difference]: With dead ends: 1353 [2021-12-27 21:56:58,148 INFO L226 Difference]: Without dead ends: 1342 [2021-12-27 21:56:58,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:58,151 INFO L933 BasicCegarLoop]: 1160 mSDtfsCounter, 337 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 1984 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:58,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 1984 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:58,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-12-27 21:56:58,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1089. [2021-12-27 21:56:58,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 865 states have (on average 1.416184971098266) internal successors, (1225), 863 states have internal predecessors, (1225), 161 states have call successors, (161), 55 states have call predecessors, (161), 62 states have return successors, (216), 170 states have call predecessors, (216), 155 states have call successors, (216) [2021-12-27 21:56:58,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1602 transitions. [2021-12-27 21:56:58,188 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1602 transitions. Word has length 33 [2021-12-27 21:56:58,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:58,188 INFO L470 AbstractCegarLoop]: Abstraction has 1089 states and 1602 transitions. [2021-12-27 21:56:58,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:58,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1602 transitions. [2021-12-27 21:56:58,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-27 21:56:58,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:58,190 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:56:58,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-27 21:56:58,190 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:58,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:58,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1785217405, now seen corresponding path program 1 times [2021-12-27 21:56:58,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:58,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091299636] [2021-12-27 21:56:58,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:58,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:58,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:58,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091299636] [2021-12-27 21:56:58,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091299636] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:58,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:58,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-27 21:56:58,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317593676] [2021-12-27 21:56:58,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:58,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 21:56:58,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:58,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 21:56:58,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-27 21:56:58,245 INFO L87 Difference]: Start difference. First operand 1089 states and 1602 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:58,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:58,534 INFO L93 Difference]: Finished difference Result 1118 states and 1633 transitions. [2021-12-27 21:56:58,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 21:56:58,535 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-27 21:56:58,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:58,538 INFO L225 Difference]: With dead ends: 1118 [2021-12-27 21:56:58,538 INFO L226 Difference]: Without dead ends: 1072 [2021-12-27 21:56:58,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:56:58,539 INFO L933 BasicCegarLoop]: 850 mSDtfsCounter, 879 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 1469 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:58,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [879 Valid, 1469 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-27 21:56:58,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-12-27 21:56:58,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1060. [2021-12-27 21:56:58,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 839 states have (on average 1.4219308700834326) internal successors, (1193), 843 states have internal predecessors, (1193), 161 states have call successors, (161), 55 states have call predecessors, (161), 59 states have return successors, (205), 161 states have call predecessors, (205), 155 states have call successors, (205) [2021-12-27 21:56:58,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1559 transitions. [2021-12-27 21:56:58,573 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1559 transitions. Word has length 33 [2021-12-27 21:56:58,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:58,573 INFO L470 AbstractCegarLoop]: Abstraction has 1060 states and 1559 transitions. [2021-12-27 21:56:58,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:58,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1559 transitions. [2021-12-27 21:56:58,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-27 21:56:58,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:58,574 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:56:58,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-27 21:56:58,575 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:58,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:58,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1611974706, now seen corresponding path program 1 times [2021-12-27 21:56:58,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:58,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717878201] [2021-12-27 21:56:58,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:58,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:58,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:58,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717878201] [2021-12-27 21:56:58,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717878201] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:58,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:58,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-27 21:56:58,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773306345] [2021-12-27 21:56:58,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:58,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 21:56:58,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:58,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 21:56:58,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-27 21:56:58,655 INFO L87 Difference]: Start difference. First operand 1060 states and 1559 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:59,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:59,033 INFO L93 Difference]: Finished difference Result 1313 states and 1935 transitions. [2021-12-27 21:56:59,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 21:56:59,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-27 21:56:59,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:59,039 INFO L225 Difference]: With dead ends: 1313 [2021-12-27 21:56:59,039 INFO L226 Difference]: Without dead ends: 1309 [2021-12-27 21:56:59,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:56:59,040 INFO L933 BasicCegarLoop]: 1134 mSDtfsCounter, 1126 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1136 SdHoareTripleChecker+Valid, 1749 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:59,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1136 Valid, 1749 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-27 21:56:59,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2021-12-27 21:56:59,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 1062. [2021-12-27 21:56:59,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 841 states have (on average 1.4209274673008323) internal successors, (1195), 845 states have internal predecessors, (1195), 161 states have call successors, (161), 55 states have call predecessors, (161), 59 states have return successors, (205), 161 states have call predecessors, (205), 155 states have call successors, (205) [2021-12-27 21:56:59,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1561 transitions. [2021-12-27 21:56:59,076 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1561 transitions. Word has length 34 [2021-12-27 21:56:59,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:59,077 INFO L470 AbstractCegarLoop]: Abstraction has 1062 states and 1561 transitions. [2021-12-27 21:56:59,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:59,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1561 transitions. [2021-12-27 21:56:59,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-27 21:56:59,079 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:59,079 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:56:59,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-27 21:56:59,079 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:59,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:59,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1612251536, now seen corresponding path program 1 times [2021-12-27 21:56:59,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:59,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087918284] [2021-12-27 21:56:59,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:59,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:59,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:59,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087918284] [2021-12-27 21:56:59,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087918284] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:59,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:59,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-27 21:56:59,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706644771] [2021-12-27 21:56:59,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:59,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-27 21:56:59,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:59,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-27 21:56:59,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-27 21:56:59,151 INFO L87 Difference]: Start difference. First operand 1062 states and 1561 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:59,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:59,253 INFO L93 Difference]: Finished difference Result 1074 states and 1573 transitions. [2021-12-27 21:56:59,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-27 21:56:59,253 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-27 21:56:59,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:59,256 INFO L225 Difference]: With dead ends: 1074 [2021-12-27 21:56:59,256 INFO L226 Difference]: Without dead ends: 1046 [2021-12-27 21:56:59,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-27 21:56:59,257 INFO L933 BasicCegarLoop]: 857 mSDtfsCounter, 34 mSDsluCounter, 3381 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 4238 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:59,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 4238 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:59,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2021-12-27 21:56:59,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 1046. [2021-12-27 21:56:59,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 825 states have (on average 1.4254545454545455) internal successors, (1176), 829 states have internal predecessors, (1176), 161 states have call successors, (161), 55 states have call predecessors, (161), 59 states have return successors, (205), 161 states have call predecessors, (205), 155 states have call successors, (205) [2021-12-27 21:56:59,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1542 transitions. [2021-12-27 21:56:59,292 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1542 transitions. Word has length 34 [2021-12-27 21:56:59,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:59,292 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 1542 transitions. [2021-12-27 21:56:59,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:59,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1542 transitions. [2021-12-27 21:56:59,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-27 21:56:59,294 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:59,294 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:56:59,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-27 21:56:59,294 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:59,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:59,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1360772428, now seen corresponding path program 1 times [2021-12-27 21:56:59,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:59,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429446781] [2021-12-27 21:56:59,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:59,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:59,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-27 21:56:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:59,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-27 21:56:59,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:59,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:59,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:59,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429446781] [2021-12-27 21:56:59,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429446781] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:59,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:59,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-27 21:56:59,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371283347] [2021-12-27 21:56:59,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:59,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-27 21:56:59,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:59,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-27 21:56:59,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:56:59,384 INFO L87 Difference]: Start difference. First operand 1046 states and 1542 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, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:57:03,844 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 21:57:06,071 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 21:57:07,098 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 21:57:09,121 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 21:57:11,580 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 21:57:11,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:57:11,638 INFO L93 Difference]: Finished difference Result 1714 states and 2541 transitions. [2021-12-27 21:57:11,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-27 21:57:11,640 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, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2021-12-27 21:57:11,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:57:11,644 INFO L225 Difference]: With dead ends: 1714 [2021-12-27 21:57:11,644 INFO L226 Difference]: Without dead ends: 1178 [2021-12-27 21:57:11,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-27 21:57:11,645 INFO L933 BasicCegarLoop]: 906 mSDtfsCounter, 567 mSDsluCounter, 1424 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 258 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 2330 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:57:11,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [596 Valid, 2330 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 618 Invalid, 1 Unknown, 0 Unchecked, 12.1s Time] [2021-12-27 21:57:11,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2021-12-27 21:57:11,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1013. [2021-12-27 21:57:11,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 800 states have (on average 1.425) internal successors, (1140), 807 states have internal predecessors, (1140), 156 states have call successors, (156), 51 states have call predecessors, (156), 56 states have return successors, (212), 154 states have call predecessors, (212), 150 states have call successors, (212) [2021-12-27 21:57:11,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1508 transitions. [2021-12-27 21:57:11,680 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1508 transitions. Word has length 43 [2021-12-27 21:57:11,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:57:11,680 INFO L470 AbstractCegarLoop]: Abstraction has 1013 states and 1508 transitions. [2021-12-27 21:57:11,680 INFO L471 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, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:57:11,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1508 transitions. [2021-12-27 21:57:11,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-27 21:57:11,682 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:57:11,682 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:57:11,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-27 21:57:11,682 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:57:11,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:57:11,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1135681463, now seen corresponding path program 1 times [2021-12-27 21:57:11,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:57:11,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525800402] [2021-12-27 21:57:11,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:57:11,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:57:11,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:57:11,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-27 21:57:11,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:57:11,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-27 21:57:11,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:57:11,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:57:11,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:57:11,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525800402] [2021-12-27 21:57:11,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525800402] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:57:11,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:57:11,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-27 21:57:11,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303695448] [2021-12-27 21:57:11,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:57:11,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-27 21:57:11,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:57:11,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-27 21:57:11,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:57:11,754 INFO L87 Difference]: Start difference. First operand 1013 states and 1508 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-27 21:57:15,716 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 21:57:19,321 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 21:57:21,177 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 21:57:24,302 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 21:57:25,314 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 21:57:25,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:57:25,378 INFO L93 Difference]: Finished difference Result 1095 states and 1641 transitions. [2021-12-27 21:57:25,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-27 21:57:25,381 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2021-12-27 21:57:25,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:57:25,384 INFO L225 Difference]: With dead ends: 1095 [2021-12-27 21:57:25,384 INFO L226 Difference]: Without dead ends: 1088 [2021-12-27 21:57:25,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-27 21:57:25,385 INFO L933 BasicCegarLoop]: 815 mSDtfsCounter, 251 mSDsluCounter, 1539 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 241 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 2354 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2021-12-27 21:57:25,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 2354 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 664 Invalid, 3 Unknown, 0 Unchecked, 13.5s Time] [2021-12-27 21:57:25,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-12-27 21:57:25,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 1025. [2021-12-27 21:57:25,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 812 states have (on average 1.4211822660098523) internal successors, (1154), 819 states have internal predecessors, (1154), 156 states have call successors, (156), 51 states have call predecessors, (156), 56 states have return successors, (212), 154 states have call predecessors, (212), 150 states have call successors, (212) [2021-12-27 21:57:25,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1522 transitions. [2021-12-27 21:57:25,428 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1522 transitions. Word has length 43 [2021-12-27 21:57:25,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:57:25,428 INFO L470 AbstractCegarLoop]: Abstraction has 1025 states and 1522 transitions. [2021-12-27 21:57:25,429 INFO L471 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-27 21:57:25,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1522 transitions. [2021-12-27 21:57:25,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-27 21:57:25,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:57:25,430 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:57:25,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-27 21:57:25,430 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:57:25,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:57:25,431 INFO L85 PathProgramCache]: Analyzing trace with hash 436620093, now seen corresponding path program 1 times [2021-12-27 21:57:25,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:57:25,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55509722] [2021-12-27 21:57:25,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:57:25,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:57:25,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:57:25,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-27 21:57:25,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:57:25,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-27 21:57:25,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:57:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:57:25,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:57:25,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55509722] [2021-12-27 21:57:25,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55509722] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:57:25,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:57:25,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-27 21:57:25,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650840641] [2021-12-27 21:57:25,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:57:25,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-27 21:57:25,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:57:25,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-27 21:57:25,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:57:25,509 INFO L87 Difference]: Start difference. First operand 1025 states and 1522 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 3 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)