./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ad0884018313fc350052496ea1071e31a8b2c3997d36767afc87946a21697816 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 23:47:03,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 23:47:03,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 23:47:03,275 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 23:47:03,275 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 23:47:03,277 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 23:47:03,278 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 23:47:03,280 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 23:47:03,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 23:47:03,286 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 23:47:03,286 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 23:47:03,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 23:47:03,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 23:47:03,291 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 23:47:03,291 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 23:47:03,293 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 23:47:03,293 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 23:47:03,304 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 23:47:03,305 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 23:47:03,306 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 23:47:03,307 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 23:47:03,308 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 23:47:03,309 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 23:47:03,310 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 23:47:03,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 23:47:03,313 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 23:47:03,313 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 23:47:03,313 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 23:47:03,314 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 23:47:03,314 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 23:47:03,315 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 23:47:03,315 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 23:47:03,315 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 23:47:03,316 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 23:47:03,324 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 23:47:03,325 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 23:47:03,325 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 23:47:03,325 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 23:47:03,325 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 23:47:03,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 23:47:03,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 23:47:03,328 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 23:47:03,330 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 23:47:03,359 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 23:47:03,359 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 23:47:03,360 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 23:47:03,360 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 23:47:03,360 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 23:47:03,360 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 23:47:03,361 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 23:47:03,361 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 23:47:03,361 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 23:47:03,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 23:47:03,362 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 23:47:03,362 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 23:47:03,362 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 23:47:03,362 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 23:47:03,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 23:47:03,362 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 23:47:03,363 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 23:47:03,363 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 23:47:03,363 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 23:47:03,364 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 23:47:03,364 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 23:47:03,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 23:47:03,364 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 23:47:03,364 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 23:47:03,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:47:03,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 23:47:03,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 23:47:03,365 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 23:47:03,365 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 23:47:03,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 23:47:03,366 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 23:47:03,366 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 23:47:03,366 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 23:47:03,366 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad0884018313fc350052496ea1071e31a8b2c3997d36767afc87946a21697816 [2022-07-11 23:47:03,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 23:47:03,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 23:47:03,602 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 23:47:03,603 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 23:47:03,603 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 23:47:03,604 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c [2022-07-11 23:47:03,671 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f4ecf93e/48714bb17fe540b79dc02fe9b971615b/FLAGe9645bae7 [2022-07-11 23:47:04,330 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 23:47:04,331 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c [2022-07-11 23:47:04,370 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f4ecf93e/48714bb17fe540b79dc02fe9b971615b/FLAGe9645bae7 [2022-07-11 23:47:04,627 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f4ecf93e/48714bb17fe540b79dc02fe9b971615b [2022-07-11 23:47:04,631 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 23:47:04,632 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 23:47:04,634 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 23:47:04,634 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 23:47:04,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 23:47:04,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:47:04" (1/1) ... [2022-07-11 23:47:04,637 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23e517ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:04, skipping insertion in model container [2022-07-11 23:47:04,637 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:47:04" (1/1) ... [2022-07-11 23:47:04,666 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 23:47:04,752 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 23:47:05,149 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-1.c[90162,90175] [2022-07-11 23:47:05,654 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:47:05,661 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 23:47:05,712 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-1.c[90162,90175] [2022-07-11 23:47:05,937 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:47:05,956 INFO L208 MainTranslator]: Completed translation [2022-07-11 23:47:05,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:05 WrapperNode [2022-07-11 23:47:05,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 23:47:05,957 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 23:47:05,957 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 23:47:05,957 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 23:47:05,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:05" (1/1) ... [2022-07-11 23:47:06,024 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:05" (1/1) ... [2022-07-11 23:47:06,138 INFO L137 Inliner]: procedures = 120, calls = 2195, calls flagged for inlining = 23, calls inlined = 19, statements flattened = 2336 [2022-07-11 23:47:06,139 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 23:47:06,140 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 23:47:06,140 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 23:47:06,140 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 23:47:06,146 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:05" (1/1) ... [2022-07-11 23:47:06,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:05" (1/1) ... [2022-07-11 23:47:06,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:05" (1/1) ... [2022-07-11 23:47:06,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:05" (1/1) ... [2022-07-11 23:47:06,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:05" (1/1) ... [2022-07-11 23:47:06,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:05" (1/1) ... [2022-07-11 23:47:06,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:05" (1/1) ... [2022-07-11 23:47:06,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 23:47:06,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 23:47:06,282 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 23:47:06,282 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 23:47:06,283 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:05" (1/1) ... [2022-07-11 23:47:06,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:47:06,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:47:06,304 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-11 23:47:06,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-11 23:47:06,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-07-11 23:47:06,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-07-11 23:47:06,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-11 23:47:06,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 23:47:06,345 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-07-11 23:47:06,345 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-07-11 23:47:06,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-07-11 23:47:06,345 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-07-11 23:47:06,345 INFO L130 BoogieDeclarations]: Found specification of procedure MmLockPagableDataSection [2022-07-11 23:47:06,345 INFO L138 BoogieDeclarations]: Found implementation of procedure MmLockPagableDataSection [2022-07-11 23:47:06,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 23:47:06,345 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2022-07-11 23:47:06,345 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2022-07-11 23:47:06,345 INFO L130 BoogieDeclarations]: Found specification of procedure IoOpenDeviceRegistryKey [2022-07-11 23:47:06,345 INFO L138 BoogieDeclarations]: Found implementation of procedure IoOpenDeviceRegistryKey [2022-07-11 23:47:06,345 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-07-11 23:47:06,345 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-07-11 23:47:06,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-11 23:47:06,345 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-11 23:47:06,345 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_malloc [2022-07-11 23:47:06,345 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_malloc [2022-07-11 23:47:06,346 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-07-11 23:47:06,346 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-07-11 23:47:06,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-11 23:47:06,346 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-07-11 23:47:06,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-07-11 23:47:06,346 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2022-07-11 23:47:06,346 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2022-07-11 23:47:06,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 23:47:06,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-11 23:47:06,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-11 23:47:06,346 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-07-11 23:47:06,346 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-07-11 23:47:06,346 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-07-11 23:47:06,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-11 23:47:06,359 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-07-11 23:47:06,359 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-07-11 23:47:06,359 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2022-07-11 23:47:06,359 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2022-07-11 23:47:06,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-11 23:47:06,359 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-07-11 23:47:06,360 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-07-11 23:47:06,360 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2022-07-11 23:47:06,360 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2022-07-11 23:47:06,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 23:47:06,360 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2022-07-11 23:47:06,360 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2022-07-11 23:47:06,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-07-11 23:47:06,360 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2022-07-11 23:47:06,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2022-07-11 23:47:06,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 23:47:06,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 23:47:06,360 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2022-07-11 23:47:06,360 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2022-07-11 23:47:06,655 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 23:47:06,656 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 23:47:06,843 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:47:06,854 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-07-11 23:47:06,854 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-07-11 23:47:07,221 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:47:07,242 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-07-11 23:47:07,242 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-07-11 23:47:07,256 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:47:07,257 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:47:07,258 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:47:07,276 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:47:07,280 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:47:07,284 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:47:18,266 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##276: assume false; [2022-07-11 23:47:18,266 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##277: assume !false; [2022-07-11 23:47:18,266 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##504: assume !false; [2022-07-11 23:47:18,266 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##503: assume false; [2022-07-11 23:47:18,266 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint L3709: CdAudioPnp_#res#1 := 0; [2022-07-11 23:47:18,266 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##172: assume !false; [2022-07-11 23:47:18,266 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##171: assume false; [2022-07-11 23:47:18,266 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##65: assume !false; [2022-07-11 23:47:18,266 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##64: assume false; [2022-07-11 23:47:18,266 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##43: assume !false; [2022-07-11 23:47:18,267 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##42: assume false; [2022-07-11 23:47:18,267 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##32: assume false; [2022-07-11 23:47:18,267 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##33: assume !false; [2022-07-11 23:47:18,292 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:47:18,295 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-07-11 23:47:18,295 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-07-11 23:47:18,305 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 23:47:18,313 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 23:47:18,313 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-11 23:47:18,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:47:18 BoogieIcfgContainer [2022-07-11 23:47:18,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 23:47:18,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 23:47:18,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 23:47:18,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 23:47:18,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 11:47:04" (1/3) ... [2022-07-11 23:47:18,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46b773c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:47:18, skipping insertion in model container [2022-07-11 23:47:18,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:05" (2/3) ... [2022-07-11 23:47:18,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46b773c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:47:18, skipping insertion in model container [2022-07-11 23:47:18,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:47:18" (3/3) ... [2022-07-11 23:47:18,321 INFO L111 eAbstractionObserver]: Analyzing ICFG cdaudio.i.cil-1.c [2022-07-11 23:47:18,330 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 23:47:18,330 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 23:47:18,383 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 23:47:18,389 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6b3b7f12, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@23ff5530 [2022-07-11 23:47:18,389 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 23:47:18,396 INFO L276 IsEmpty]: Start isEmpty. Operand has 625 states, 491 states have (on average 1.5274949083503055) internal successors, (750), 510 states have internal predecessors, (750), 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) [2022-07-11 23:47:18,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-11 23:47:18,405 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:18,405 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:47:18,406 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:18,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:18,409 INFO L85 PathProgramCache]: Analyzing trace with hash 678118687, now seen corresponding path program 1 times [2022-07-11 23:47:18,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:18,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629897253] [2022-07-11 23:47:18,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:18,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:47:18,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:18,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629897253] [2022-07-11 23:47:18,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629897253] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:18,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:18,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-11 23:47:18,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239619007] [2022-07-11 23:47:18,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:18,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-11 23:47:18,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:18,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-11 23:47:18,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 23:47:18,617 INFO L87 Difference]: Start difference. First operand has 625 states, 491 states have (on average 1.5274949083503055) internal successors, (750), 510 states have internal predecessors, (750), 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 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:47:18,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:47:18,672 INFO L93 Difference]: Finished difference Result 1244 states and 1994 transitions. [2022-07-11 23:47:18,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-11 23:47:18,674 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-11 23:47:18,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:47:18,683 INFO L225 Difference]: With dead ends: 1244 [2022-07-11 23:47:18,683 INFO L226 Difference]: Without dead ends: 618 [2022-07-11 23:47:18,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 23:47:18,690 INFO L413 NwaCegarLoop]: 943 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:47:18,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:47:18,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-07-11 23:47:18,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2022-07-11 23:47:18,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 486 states have (on average 1.4835390946502058) internal successors, (721), 503 states have internal predecessors, (721), 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) [2022-07-11 23:47:18,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 931 transitions. [2022-07-11 23:47:18,746 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 931 transitions. Word has length 19 [2022-07-11 23:47:18,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:47:18,746 INFO L495 AbstractCegarLoop]: Abstraction has 618 states and 931 transitions. [2022-07-11 23:47:18,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:47:18,746 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 931 transitions. [2022-07-11 23:47:18,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-11 23:47:18,747 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:18,747 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:47:18,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 23:47:18,748 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:18,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:18,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1841730419, now seen corresponding path program 1 times [2022-07-11 23:47:18,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:18,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899203936] [2022-07-11 23:47:18,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:18,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:18,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:47:18,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:18,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899203936] [2022-07-11 23:47:18,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899203936] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:18,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:18,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:47:18,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056056658] [2022-07-11 23:47:18,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:18,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:47:18,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:18,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:47:18,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:47:18,829 INFO L87 Difference]: Start difference. First operand 618 states and 931 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:47:18,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:47:18,930 INFO L93 Difference]: Finished difference Result 637 states and 956 transitions. [2022-07-11 23:47:18,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:47:18,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-11 23:47:18,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:47:18,947 INFO L225 Difference]: With dead ends: 637 [2022-07-11 23:47:18,963 INFO L226 Difference]: Without dead ends: 618 [2022-07-11 23:47:18,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:47:18,965 INFO L413 NwaCegarLoop]: 929 mSDtfsCounter, 16 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1797 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:47:18,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 1797 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:47:18,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-07-11 23:47:18,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2022-07-11 23:47:18,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 486 states have (on average 1.4814814814814814) internal successors, (720), 503 states have internal predecessors, (720), 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) [2022-07-11 23:47:18,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 930 transitions. [2022-07-11 23:47:18,996 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 930 transitions. Word has length 19 [2022-07-11 23:47:19,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:47:19,031 INFO L495 AbstractCegarLoop]: Abstraction has 618 states and 930 transitions. [2022-07-11 23:47:19,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:47:19,032 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 930 transitions. [2022-07-11 23:47:19,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-11 23:47:19,032 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:19,032 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:47:19,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-11 23:47:19,033 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:19,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:19,033 INFO L85 PathProgramCache]: Analyzing trace with hash -948115898, now seen corresponding path program 1 times [2022-07-11 23:47:19,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:19,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765373037] [2022-07-11 23:47:19,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:19,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:19,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:47:19,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:19,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765373037] [2022-07-11 23:47:19,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765373037] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:19,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:19,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:47:19,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429860540] [2022-07-11 23:47:19,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:19,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:47:19,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:19,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:47:19,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:47:19,152 INFO L87 Difference]: Start difference. First operand 618 states and 930 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:47:19,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:47:19,302 INFO L93 Difference]: Finished difference Result 1147 states and 1711 transitions. [2022-07-11 23:47:19,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:47:19,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-11 23:47:19,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:47:19,310 INFO L225 Difference]: With dead ends: 1147 [2022-07-11 23:47:19,310 INFO L226 Difference]: Without dead ends: 898 [2022-07-11 23:47:19,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:47:19,315 INFO L413 NwaCegarLoop]: 1250 mSDtfsCounter, 844 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 1674 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 [2022-07-11 23:47:19,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [844 Valid, 1674 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:47:19,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-07-11 23:47:19,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 879. [2022-07-11 23:47:19,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 704 states have (on average 1.4602272727272727) internal successors, (1028), 707 states have internal predecessors, (1028), 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) [2022-07-11 23:47:19,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1316 transitions. [2022-07-11 23:47:19,366 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1316 transitions. Word has length 21 [2022-07-11 23:47:19,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:47:19,366 INFO L495 AbstractCegarLoop]: Abstraction has 879 states and 1316 transitions. [2022-07-11 23:47:19,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:47:19,367 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1316 transitions. [2022-07-11 23:47:19,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-11 23:47:19,371 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:19,372 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:47:19,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-11 23:47:19,372 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:19,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:19,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1453767215, now seen corresponding path program 1 times [2022-07-11 23:47:19,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:19,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570169801] [2022-07-11 23:47:19,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:19,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:19,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:19,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:47:19,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:19,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570169801] [2022-07-11 23:47:19,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570169801] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:19,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:19,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:47:19,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328370608] [2022-07-11 23:47:19,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:19,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:47:19,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:19,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:47:19,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:47:19,455 INFO L87 Difference]: Start difference. First operand 879 states and 1316 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-07-11 23:47:19,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:47:19,557 INFO L93 Difference]: Finished difference Result 1871 states and 2863 transitions. [2022-07-11 23:47:19,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:47:19,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 28 [2022-07-11 23:47:19,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:47:19,564 INFO L225 Difference]: With dead ends: 1871 [2022-07-11 23:47:19,564 INFO L226 Difference]: Without dead ends: 1460 [2022-07-11 23:47:19,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:47:19,566 INFO L413 NwaCegarLoop]: 1461 mSDtfsCounter, 585 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 2337 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 [2022-07-11 23:47:19,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 2337 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:47:19,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2022-07-11 23:47:19,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1058. [2022-07-11 23:47:19,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 841 states have (on average 1.44589774078478) internal successors, (1216), 843 states have internal predecessors, (1216), 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) [2022-07-11 23:47:19,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 1603 transitions. [2022-07-11 23:47:19,595 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 1603 transitions. Word has length 28 [2022-07-11 23:47:19,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:47:19,595 INFO L495 AbstractCegarLoop]: Abstraction has 1058 states and 1603 transitions. [2022-07-11 23:47:19,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-07-11 23:47:19,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 1603 transitions. [2022-07-11 23:47:19,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-11 23:47:19,596 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:19,596 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:47:19,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-11 23:47:19,597 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:19,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:19,597 INFO L85 PathProgramCache]: Analyzing trace with hash -720563744, now seen corresponding path program 1 times [2022-07-11 23:47:19,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:19,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414277673] [2022-07-11 23:47:19,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:19,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:19,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:19,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:47:19,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:19,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414277673] [2022-07-11 23:47:19,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414277673] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:19,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:19,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:47:19,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185961177] [2022-07-11 23:47:19,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:19,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:47:19,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:19,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:47:19,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:47:19,707 INFO L87 Difference]: Start difference. First operand 1058 states and 1603 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-07-11 23:47:19,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:47:19,750 INFO L93 Difference]: Finished difference Result 1734 states and 2579 transitions. [2022-07-11 23:47:19,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:47:19,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 28 [2022-07-11 23:47:19,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:47:19,757 INFO L225 Difference]: With dead ends: 1734 [2022-07-11 23:47:19,757 INFO L226 Difference]: Without dead ends: 1602 [2022-07-11 23:47:19,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:47:19,760 INFO L413 NwaCegarLoop]: 1164 mSDtfsCounter, 847 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 1572 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 [2022-07-11 23:47:19,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [847 Valid, 1572 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:47:19,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1602 states. [2022-07-11 23:47:19,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1602 to 1541. [2022-07-11 23:47:19,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1541 states, 1237 states have (on average 1.4470493128536783) internal successors, (1790), 1235 states have internal predecessors, (1790), 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) [2022-07-11 23:47:19,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1541 states to 1541 states and 2315 transitions. [2022-07-11 23:47:19,806 INFO L78 Accepts]: Start accepts. Automaton has 1541 states and 2315 transitions. Word has length 28 [2022-07-11 23:47:19,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:47:19,807 INFO L495 AbstractCegarLoop]: Abstraction has 1541 states and 2315 transitions. [2022-07-11 23:47:19,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-07-11 23:47:19,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states and 2315 transitions. [2022-07-11 23:47:19,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-11 23:47:19,808 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:19,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:47:19,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-11 23:47:19,808 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:19,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:19,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1878054380, now seen corresponding path program 1 times [2022-07-11 23:47:19,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:19,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604103941] [2022-07-11 23:47:19,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:19,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:19,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:47:19,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:19,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604103941] [2022-07-11 23:47:19,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604103941] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:19,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:19,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:47:19,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908075340] [2022-07-11 23:47:19,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:19,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:47:19,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:19,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:47:19,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:47:19,874 INFO L87 Difference]: Start difference. First operand 1541 states and 2315 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2022-07-11 23:47:20,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:47:20,366 INFO L93 Difference]: Finished difference Result 2750 states and 4167 transitions. [2022-07-11 23:47:20,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:47:20,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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 29 [2022-07-11 23:47:20,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:47:20,373 INFO L225 Difference]: With dead ends: 2750 [2022-07-11 23:47:20,374 INFO L226 Difference]: Without dead ends: 1839 [2022-07-11 23:47:20,377 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:47:20,379 INFO L413 NwaCegarLoop]: 1174 mSDtfsCounter, 1438 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1440 SdHoareTripleChecker+Valid, 1496 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:47:20,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1440 Valid, 1496 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:47:20,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2022-07-11 23:47:20,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1529. [2022-07-11 23:47:20,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1227 states have (on average 1.4441727791361043) internal successors, (1772), 1225 states have internal predecessors, (1772), 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) [2022-07-11 23:47:20,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 2291 transitions. [2022-07-11 23:47:20,426 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 2291 transitions. Word has length 29 [2022-07-11 23:47:20,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:47:20,427 INFO L495 AbstractCegarLoop]: Abstraction has 1529 states and 2291 transitions. [2022-07-11 23:47:20,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2022-07-11 23:47:20,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 2291 transitions. [2022-07-11 23:47:20,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-11 23:47:20,429 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:20,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:47:20,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-11 23:47:20,433 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:20,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:20,433 INFO L85 PathProgramCache]: Analyzing trace with hash 322594645, now seen corresponding path program 1 times [2022-07-11 23:47:20,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:20,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871415043] [2022-07-11 23:47:20,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:20,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:20,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:47:20,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:20,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871415043] [2022-07-11 23:47:20,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871415043] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:20,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:20,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:47:20,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654245336] [2022-07-11 23:47:20,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:20,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:47:20,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:20,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:47:20,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:47:20,497 INFO L87 Difference]: Start difference. First operand 1529 states and 2291 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-07-11 23:47:20,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:47:20,580 INFO L93 Difference]: Finished difference Result 1532 states and 2293 transitions. [2022-07-11 23:47:20,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:47:20,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 28 [2022-07-11 23:47:20,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:47:20,586 INFO L225 Difference]: With dead ends: 1532 [2022-07-11 23:47:20,586 INFO L226 Difference]: Without dead ends: 1528 [2022-07-11 23:47:20,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:47:20,587 INFO L413 NwaCegarLoop]: 889 mSDtfsCounter, 34 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1721 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 [2022-07-11 23:47:20,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 1721 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:47:20,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2022-07-11 23:47:20,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1528. [2022-07-11 23:47:20,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1227 states have (on average 1.4425427872860637) internal successors, (1770), 1224 states have internal predecessors, (1770), 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) [2022-07-11 23:47:20,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 2288 transitions. [2022-07-11 23:47:20,626 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 2288 transitions. Word has length 28 [2022-07-11 23:47:20,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:47:20,626 INFO L495 AbstractCegarLoop]: Abstraction has 1528 states and 2288 transitions. [2022-07-11 23:47:20,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-07-11 23:47:20,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 2288 transitions. [2022-07-11 23:47:20,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-11 23:47:20,628 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:20,628 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:47:20,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-11 23:47:20,629 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:20,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:20,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1553595828, now seen corresponding path program 1 times [2022-07-11 23:47:20,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:20,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453704598] [2022-07-11 23:47:20,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:20,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:20,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:20,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 23:47:20,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:20,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:47:20,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:20,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453704598] [2022-07-11 23:47:20,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453704598] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:20,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:20,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:47:20,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039882044] [2022-07-11 23:47:20,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:20,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:47:20,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:20,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:47:20,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:47:20,711 INFO L87 Difference]: Start difference. First operand 1528 states and 2288 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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) [2022-07-11 23:47:26,046 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 [] [2022-07-11 23:47:29,689 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:47:32,737 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:47:32,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:47:32,812 INFO L93 Difference]: Finished difference Result 2372 states and 3499 transitions. [2022-07-11 23:47:32,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 23:47:32,814 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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 41 [2022-07-11 23:47:32,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:47:32,823 INFO L225 Difference]: With dead ends: 2372 [2022-07-11 23:47:32,823 INFO L226 Difference]: Without dead ends: 1287 [2022-07-11 23:47:32,825 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:47:32,826 INFO L413 NwaCegarLoop]: 995 mSDtfsCounter, 791 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 283 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 2618 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:47:32,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [794 Valid, 2618 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 486 Invalid, 3 Unknown, 0 Unchecked, 12.0s Time] [2022-07-11 23:47:32,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2022-07-11 23:47:32,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1145. [2022-07-11 23:47:32,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 920 states have (on average 1.4217391304347826) internal successors, (1308), 919 states have internal predecessors, (1308), 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) [2022-07-11 23:47:32,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 1686 transitions. [2022-07-11 23:47:32,876 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 1686 transitions. Word has length 41 [2022-07-11 23:47:32,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:47:32,876 INFO L495 AbstractCegarLoop]: Abstraction has 1145 states and 1686 transitions. [2022-07-11 23:47:32,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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) [2022-07-11 23:47:32,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 1686 transitions. [2022-07-11 23:47:32,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-11 23:47:32,878 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:32,878 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:47:32,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-11 23:47:32,878 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:32,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:32,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1070706914, now seen corresponding path program 1 times [2022-07-11 23:47:32,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:32,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453604211] [2022-07-11 23:47:32,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:32,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:32,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:47:32,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:32,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453604211] [2022-07-11 23:47:32,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453604211] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:32,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:32,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:47:32,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634500034] [2022-07-11 23:47:32,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:32,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:47:32,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:32,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:47:32,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:47:32,957 INFO L87 Difference]: Start difference. First operand 1145 states and 1686 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2022-07-11 23:47:33,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:47:33,283 INFO L93 Difference]: Finished difference Result 1206 states and 1766 transitions. [2022-07-11 23:47:33,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:47:33,284 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 37 [2022-07-11 23:47:33,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:47:33,288 INFO L225 Difference]: With dead ends: 1206 [2022-07-11 23:47:33,288 INFO L226 Difference]: Without dead ends: 1162 [2022-07-11 23:47:33,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:47:33,290 INFO L413 NwaCegarLoop]: 885 mSDtfsCounter, 922 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 1546 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 [2022-07-11 23:47:33,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [922 Valid, 1546 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-11 23:47:33,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2022-07-11 23:47:33,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1145. [2022-07-11 23:47:33,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 920 states have (on average 1.4195652173913043) internal successors, (1306), 919 states have internal predecessors, (1306), 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) [2022-07-11 23:47:33,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 1684 transitions. [2022-07-11 23:47:33,322 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 1684 transitions. Word has length 37 [2022-07-11 23:47:33,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:47:33,322 INFO L495 AbstractCegarLoop]: Abstraction has 1145 states and 1684 transitions. [2022-07-11 23:47:33,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2022-07-11 23:47:33,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 1684 transitions. [2022-07-11 23:47:33,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-11 23:47:33,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:33,324 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:47:33,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-11 23:47:33,325 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:33,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:33,325 INFO L85 PathProgramCache]: Analyzing trace with hash -117279878, now seen corresponding path program 1 times [2022-07-11 23:47:33,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:33,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687221244] [2022-07-11 23:47:33,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:33,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:33,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-11 23:47:33,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:33,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:47:33,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:33,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687221244] [2022-07-11 23:47:33,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687221244] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:33,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:33,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:47:33,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437700637] [2022-07-11 23:47:33,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:33,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:47:33,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:33,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:47:33,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:47:33,405 INFO L87 Difference]: Start difference. First operand 1145 states and 1684 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 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) [2022-07-11 23:47:37,684 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:47:39,831 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:47:42,712 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:47:44,248 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:47:45,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:47:45,330 INFO L93 Difference]: Finished difference Result 1841 states and 2715 transitions. [2022-07-11 23:47:45,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:47:45,331 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 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 42 [2022-07-11 23:47:45,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:47:45,335 INFO L225 Difference]: With dead ends: 1841 [2022-07-11 23:47:45,336 INFO L226 Difference]: Without dead ends: 1201 [2022-07-11 23:47:45,336 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:47:45,337 INFO L413 NwaCegarLoop]: 871 mSDtfsCounter, 930 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 136 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 990 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2022-07-11 23:47:45,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [990 Valid, 1285 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 323 Invalid, 3 Unknown, 0 Unchecked, 11.9s Time] [2022-07-11 23:47:45,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2022-07-11 23:47:45,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1142. [2022-07-11 23:47:45,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 918 states have (on average 1.411764705882353) internal successors, (1296), 916 states have internal predecessors, (1296), 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) [2022-07-11 23:47:45,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 1673 transitions. [2022-07-11 23:47:45,414 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 1673 transitions. Word has length 42 [2022-07-11 23:47:45,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:47:45,414 INFO L495 AbstractCegarLoop]: Abstraction has 1142 states and 1673 transitions. [2022-07-11 23:47:45,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 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) [2022-07-11 23:47:45,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 1673 transitions. [2022-07-11 23:47:45,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-11 23:47:45,417 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:45,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:47:45,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-11 23:47:45,417 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:45,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:45,418 INFO L85 PathProgramCache]: Analyzing trace with hash 487863225, now seen corresponding path program 1 times [2022-07-11 23:47:45,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:45,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054306217] [2022-07-11 23:47:45,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:45,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:47:45,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:45,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054306217] [2022-07-11 23:47:45,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054306217] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:45,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:45,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:47:45,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23577294] [2022-07-11 23:47:45,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:45,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:47:45,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:45,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:47:45,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:47:45,485 INFO L87 Difference]: Start difference. First operand 1142 states and 1673 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2022-07-11 23:47:45,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:47:45,895 INFO L93 Difference]: Finished difference Result 1456 states and 2130 transitions. [2022-07-11 23:47:45,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:47:45,895 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 39 [2022-07-11 23:47:45,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:47:45,900 INFO L225 Difference]: With dead ends: 1456 [2022-07-11 23:47:45,900 INFO L226 Difference]: Without dead ends: 1447 [2022-07-11 23:47:45,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:47:45,901 INFO L413 NwaCegarLoop]: 1210 mSDtfsCounter, 1169 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1169 SdHoareTripleChecker+Valid, 1875 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:47:45,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1169 Valid, 1875 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:47:45,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2022-07-11 23:47:45,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 1182. [2022-07-11 23:47:45,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 955 states have (on average 1.4020942408376964) internal successors, (1339), 946 states have internal predecessors, (1339), 162 states have call successors, (162), 55 states have call predecessors, (162), 64 states have return successors, (225), 180 states have call predecessors, (225), 155 states have call successors, (225) [2022-07-11 23:47:45,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1726 transitions. [2022-07-11 23:47:45,936 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1726 transitions. Word has length 39 [2022-07-11 23:47:45,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:47:45,936 INFO L495 AbstractCegarLoop]: Abstraction has 1182 states and 1726 transitions. [2022-07-11 23:47:45,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2022-07-11 23:47:45,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1726 transitions. [2022-07-11 23:47:45,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-11 23:47:45,938 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:45,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:47:45,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-11 23:47:45,938 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:45,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:45,939 INFO L85 PathProgramCache]: Analyzing trace with hash 487586395, now seen corresponding path program 1 times [2022-07-11 23:47:45,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:45,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008674696] [2022-07-11 23:47:45,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:45,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:45,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:45,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:47:45,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:45,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008674696] [2022-07-11 23:47:45,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008674696] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:45,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:45,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:47:45,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143976803] [2022-07-11 23:47:45,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:45,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:47:45,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:45,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:47:45,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:47:45,980 INFO L87 Difference]: Start difference. First operand 1182 states and 1726 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2022-07-11 23:47:46,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:47:46,016 INFO L93 Difference]: Finished difference Result 1204 states and 1757 transitions. [2022-07-11 23:47:46,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:47:46,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 39 [2022-07-11 23:47:46,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:47:46,021 INFO L225 Difference]: With dead ends: 1204 [2022-07-11 23:47:46,021 INFO L226 Difference]: Without dead ends: 1176 [2022-07-11 23:47:46,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:47:46,022 INFO L413 NwaCegarLoop]: 882 mSDtfsCounter, 876 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 882 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 [2022-07-11 23:47:46,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [876 Valid, 882 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:47:46,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2022-07-11 23:47:46,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1149. [2022-07-11 23:47:46,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 925 states have (on average 1.4075675675675676) internal successors, (1302), 923 states have internal predecessors, (1302), 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) [2022-07-11 23:47:46,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1679 transitions. [2022-07-11 23:47:46,096 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1679 transitions. Word has length 39 [2022-07-11 23:47:46,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:47:46,097 INFO L495 AbstractCegarLoop]: Abstraction has 1149 states and 1679 transitions. [2022-07-11 23:47:46,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2022-07-11 23:47:46,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1679 transitions. [2022-07-11 23:47:46,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-11 23:47:46,098 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:46,099 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:47:46,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-11 23:47:46,099 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:46,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:46,099 INFO L85 PathProgramCache]: Analyzing trace with hash 473241486, now seen corresponding path program 1 times [2022-07-11 23:47:46,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:46,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688056522] [2022-07-11 23:47:46,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:46,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:46,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:46,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:47:46,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:46,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688056522] [2022-07-11 23:47:46,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688056522] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:46,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:46,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:47:46,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824052738] [2022-07-11 23:47:46,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:46,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:47:46,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:46,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:47:46,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:47:46,154 INFO L87 Difference]: Start difference. First operand 1149 states and 1679 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2022-07-11 23:47:46,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:47:46,230 INFO L93 Difference]: Finished difference Result 1421 states and 2077 transitions. [2022-07-11 23:47:46,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:47:46,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 39 [2022-07-11 23:47:46,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:47:46,235 INFO L225 Difference]: With dead ends: 1421 [2022-07-11 23:47:46,236 INFO L226 Difference]: Without dead ends: 1412 [2022-07-11 23:47:46,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:47:46,237 INFO L413 NwaCegarLoop]: 1187 mSDtfsCounter, 356 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 2020 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:47:46,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 2020 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:47:46,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2022-07-11 23:47:46,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1147. [2022-07-11 23:47:46,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 923 states have (on average 1.4062838569880824) internal successors, (1298), 921 states have internal predecessors, (1298), 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) [2022-07-11 23:47:46,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1675 transitions. [2022-07-11 23:47:46,279 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1675 transitions. Word has length 39 [2022-07-11 23:47:46,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:47:46,279 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1675 transitions. [2022-07-11 23:47:46,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2022-07-11 23:47:46,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1675 transitions. [2022-07-11 23:47:46,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-11 23:47:46,281 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:46,281 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:47:46,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-11 23:47:46,281 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:46,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:46,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1047230606, now seen corresponding path program 1 times [2022-07-11 23:47:46,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:46,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824318023] [2022-07-11 23:47:46,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:46,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:46,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:47:46,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:46,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824318023] [2022-07-11 23:47:46,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824318023] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:46,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:46,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:47:46,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604457256] [2022-07-11 23:47:46,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:46,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:47:46,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:46,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:47:46,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:47:46,339 INFO L87 Difference]: Start difference. First operand 1147 states and 1675 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2022-07-11 23:47:46,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:47:46,648 INFO L93 Difference]: Finished difference Result 1177 states and 1707 transitions. [2022-07-11 23:47:46,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:47:46,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 39 [2022-07-11 23:47:46,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:47:46,653 INFO L225 Difference]: With dead ends: 1177 [2022-07-11 23:47:46,653 INFO L226 Difference]: Without dead ends: 1130 [2022-07-11 23:47:46,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:47:46,654 INFO L413 NwaCegarLoop]: 871 mSDtfsCounter, 888 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 1523 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:47:46,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 1523 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-11 23:47:46,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2022-07-11 23:47:46,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 1118. [2022-07-11 23:47:46,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 897 states have (on average 1.411371237458194) internal successors, (1266), 901 states have internal predecessors, (1266), 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) [2022-07-11 23:47:46,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1632 transitions. [2022-07-11 23:47:46,735 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1632 transitions. Word has length 39 [2022-07-11 23:47:46,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:47:46,735 INFO L495 AbstractCegarLoop]: Abstraction has 1118 states and 1632 transitions. [2022-07-11 23:47:46,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2022-07-11 23:47:46,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1632 transitions. [2022-07-11 23:47:46,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-11 23:47:46,736 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:46,737 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:47:46,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-11 23:47:46,737 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:46,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:46,737 INFO L85 PathProgramCache]: Analyzing trace with hash -2056214186, now seen corresponding path program 1 times [2022-07-11 23:47:46,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:46,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758652096] [2022-07-11 23:47:46,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:46,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:47:46,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:46,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758652096] [2022-07-11 23:47:46,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758652096] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:46,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:46,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-11 23:47:46,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333422622] [2022-07-11 23:47:46,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:46,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:47:46,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:46,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:47:46,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:47:46,814 INFO L87 Difference]: Start difference. First operand 1118 states and 1632 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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) [2022-07-11 23:47:46,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:47:46,901 INFO L93 Difference]: Finished difference Result 1130 states and 1644 transitions. [2022-07-11 23:47:46,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:47:46,901 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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 40 [2022-07-11 23:47:46,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:47:46,905 INFO L225 Difference]: With dead ends: 1130 [2022-07-11 23:47:46,905 INFO L226 Difference]: Without dead ends: 1102 [2022-07-11 23:47:46,906 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:47:46,907 INFO L413 NwaCegarLoop]: 878 mSDtfsCounter, 34 mSDsluCounter, 3465 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 4343 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 [2022-07-11 23:47:46,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 4343 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:47:46,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2022-07-11 23:47:46,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 1102. [2022-07-11 23:47:46,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 881 states have (on average 1.4154370034052213) internal successors, (1247), 885 states have internal predecessors, (1247), 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) [2022-07-11 23:47:46,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1613 transitions. [2022-07-11 23:47:46,945 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1613 transitions. Word has length 40 [2022-07-11 23:47:46,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:47:46,945 INFO L495 AbstractCegarLoop]: Abstraction has 1102 states and 1613 transitions. [2022-07-11 23:47:46,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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) [2022-07-11 23:47:46,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1613 transitions. [2022-07-11 23:47:46,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-11 23:47:46,946 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:46,947 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:47:46,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-11 23:47:46,947 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:46,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:46,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1550931695, now seen corresponding path program 1 times [2022-07-11 23:47:46,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:46,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844993450] [2022-07-11 23:47:46,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:46,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:47,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 23:47:47,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:47,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-11 23:47:47,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:47,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:47:47,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:47,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844993450] [2022-07-11 23:47:47,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844993450] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:47,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:47,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:47:47,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673094746] [2022-07-11 23:47:47,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:47,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:47:47,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:47,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:47:47,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:47:47,035 INFO L87 Difference]: Start difference. First operand 1102 states and 1613 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 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) [2022-07-11 23:47:49,936 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:47:52,322 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:47:54,499 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:47:56,522 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:47:58,947 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:01,025 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:01,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:48:01,524 INFO L93 Difference]: Finished difference Result 1800 states and 2650 transitions. [2022-07-11 23:48:01,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:48:01,525 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 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 49 [2022-07-11 23:48:01,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:48:01,530 INFO L225 Difference]: With dead ends: 1800 [2022-07-11 23:48:01,530 INFO L226 Difference]: Without dead ends: 1233 [2022-07-11 23:48:01,531 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:48:01,531 INFO L413 NwaCegarLoop]: 936 mSDtfsCounter, 586 mSDsluCounter, 1482 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 258 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 2418 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:48:01,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [615 Valid, 2418 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 617 Invalid, 5 Unknown, 0 Unchecked, 14.4s Time] [2022-07-11 23:48:01,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2022-07-11 23:48:01,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1061. [2022-07-11 23:48:01,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 848 states have (on average 1.4162735849056605) internal successors, (1201), 855 states have internal predecessors, (1201), 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) [2022-07-11 23:48:01,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1569 transitions. [2022-07-11 23:48:01,568 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1569 transitions. Word has length 49 [2022-07-11 23:48:01,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:48:01,569 INFO L495 AbstractCegarLoop]: Abstraction has 1061 states and 1569 transitions. [2022-07-11 23:48:01,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 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) [2022-07-11 23:48:01,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1569 transitions. [2022-07-11 23:48:01,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-11 23:48:01,570 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:48:01,570 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:48:01,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-11 23:48:01,571 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:48:01,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:48:01,571 INFO L85 PathProgramCache]: Analyzing trace with hash -12023192, now seen corresponding path program 1 times [2022-07-11 23:48:01,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:48:01,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876517805] [2022-07-11 23:48:01,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:01,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:48:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:01,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-11 23:48:01,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:01,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-11 23:48:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:48:01,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:48:01,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876517805] [2022-07-11 23:48:01,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876517805] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:48:01,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:48:01,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:48:01,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974367710] [2022-07-11 23:48:01,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:48:01,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:48:01,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:48:01,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:48:01,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:48:01,635 INFO L87 Difference]: Start difference. First operand 1061 states and 1569 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-11 23:48:06,633 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:08,838 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:10,864 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:13,288 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:14,417 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:16,434 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:16,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:48:16,514 INFO L93 Difference]: Finished difference Result 1173 states and 1740 transitions. [2022-07-11 23:48:16,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:48:16,522 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-07-11 23:48:16,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:48:16,526 INFO L225 Difference]: With dead ends: 1173 [2022-07-11 23:48:16,526 INFO L226 Difference]: Without dead ends: 1145 [2022-07-11 23:48:16,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:48:16,526 INFO L413 NwaCegarLoop]: 838 mSDtfsCounter, 290 mSDsluCounter, 1582 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 253 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 2420 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:48:16,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 2420 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 647 Invalid, 5 Unknown, 0 Unchecked, 14.8s Time] [2022-07-11 23:48:16,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2022-07-11 23:48:16,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 1062. [2022-07-11 23:48:16,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 849 states have (on average 1.4157832744405183) internal successors, (1202), 856 states have internal predecessors, (1202), 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) [2022-07-11 23:48:16,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1570 transitions. [2022-07-11 23:48:16,588 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1570 transitions. Word has length 49 [2022-07-11 23:48:16,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:48:16,588 INFO L495 AbstractCegarLoop]: Abstraction has 1062 states and 1570 transitions. [2022-07-11 23:48:16,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-11 23:48:16,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1570 transitions. [2022-07-11 23:48:16,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-11 23:48:16,591 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:48:16,591 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:48:16,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-11 23:48:16,591 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:48:16,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:48:16,592 INFO L85 PathProgramCache]: Analyzing trace with hash 410678634, now seen corresponding path program 1 times [2022-07-11 23:48:16,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:48:16,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606707138] [2022-07-11 23:48:16,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:16,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:48:16,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:16,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-11 23:48:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:16,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-11 23:48:16,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:16,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:48:16,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:48:16,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606707138] [2022-07-11 23:48:16,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606707138] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:48:16,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:48:16,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:48:16,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282647783] [2022-07-11 23:48:16,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:48:16,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:48:16,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:48:16,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:48:16,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:48:16,666 INFO L87 Difference]: Start difference. First operand 1062 states and 1570 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 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) [2022-07-11 23:48:21,282 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:24,919 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:26,187 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:28,552 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:28,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:48:28,706 INFO L93 Difference]: Finished difference Result 1144 states and 1703 transitions. [2022-07-11 23:48:28,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 23:48:28,708 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 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 49 [2022-07-11 23:48:28,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:48:28,712 INFO L225 Difference]: With dead ends: 1144 [2022-07-11 23:48:28,712 INFO L226 Difference]: Without dead ends: 1137 [2022-07-11 23:48:28,713 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:48:28,713 INFO L413 NwaCegarLoop]: 836 mSDtfsCounter, 272 mSDsluCounter, 1578 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 241 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 2414 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:48:28,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 2414 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 668 Invalid, 2 Unknown, 0 Unchecked, 12.0s Time] [2022-07-11 23:48:28,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2022-07-11 23:48:28,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 1074. [2022-07-11 23:48:28,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 861 states have (on average 1.4123112659698025) internal successors, (1216), 868 states have internal predecessors, (1216), 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) [2022-07-11 23:48:28,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1584 transitions. [2022-07-11 23:48:28,777 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1584 transitions. Word has length 49 [2022-07-11 23:48:28,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:48:28,778 INFO L495 AbstractCegarLoop]: Abstraction has 1074 states and 1584 transitions. [2022-07-11 23:48:28,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 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) [2022-07-11 23:48:28,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1584 transitions. [2022-07-11 23:48:28,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-11 23:48:28,779 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:48:28,779 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:48:28,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-11 23:48:28,779 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:48:28,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:48:28,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1987447871, now seen corresponding path program 1 times [2022-07-11 23:48:28,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:48:28,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344334186] [2022-07-11 23:48:28,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:28,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:48:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:28,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-11 23:48:28,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:28,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-11 23:48:28,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:28,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:48:28,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:48:28,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344334186] [2022-07-11 23:48:28,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344334186] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:48:28,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:48:28,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:48:28,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050148628] [2022-07-11 23:48:28,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:48:28,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:48:28,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:48:28,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:48:28,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:48:28,885 INFO L87 Difference]: Start difference. First operand 1074 states and 1584 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 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) [2022-07-11 23:48:32,805 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:34,945 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:36,713 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:39,177 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:41,270 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:43,292 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:43,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:48:43,386 INFO L93 Difference]: Finished difference Result 1212 states and 1785 transitions. [2022-07-11 23:48:43,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:48:43,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 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) Word has length 50 [2022-07-11 23:48:43,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:48:43,392 INFO L225 Difference]: With dead ends: 1212 [2022-07-11 23:48:43,392 INFO L226 Difference]: Without dead ends: 1138 [2022-07-11 23:48:43,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:48:43,393 INFO L413 NwaCegarLoop]: 836 mSDtfsCounter, 935 mSDsluCounter, 1205 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 287 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 998 SdHoareTripleChecker+Valid, 2041 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:48:43,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [998 Valid, 2041 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 571 Invalid, 5 Unknown, 0 Unchecked, 14.4s Time] [2022-07-11 23:48:43,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2022-07-11 23:48:43,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1063. [2022-07-11 23:48:43,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 854 states have (on average 1.4133489461358313) internal successors, (1207), 861 states have internal predecessors, (1207), 154 states have call successors, (154), 49 states have call predecessors, (154), 54 states have return successors, (210), 152 states have call predecessors, (210), 148 states have call successors, (210) [2022-07-11 23:48:43,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1571 transitions. [2022-07-11 23:48:43,432 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1571 transitions. Word has length 50 [2022-07-11 23:48:43,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:48:43,433 INFO L495 AbstractCegarLoop]: Abstraction has 1063 states and 1571 transitions. [2022-07-11 23:48:43,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 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) [2022-07-11 23:48:43,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1571 transitions. [2022-07-11 23:48:43,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-11 23:48:43,434 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:48:43,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:48:43,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-11 23:48:43,434 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:48:43,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:48:43,435 INFO L85 PathProgramCache]: Analyzing trace with hash -145093477, now seen corresponding path program 1 times [2022-07-11 23:48:43,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:48:43,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7892580] [2022-07-11 23:48:43,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:43,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:48:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:43,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-11 23:48:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:43,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-11 23:48:43,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:43,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:48:43,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:48:43,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7892580] [2022-07-11 23:48:43,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7892580] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:48:43,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:48:43,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:48:43,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744482485] [2022-07-11 23:48:43,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:48:43,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:48:43,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:48:43,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:48:43,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:48:43,573 INFO L87 Difference]: Start difference. First operand 1063 states and 1571 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 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) [2022-07-11 23:48:48,452 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:50,630 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:52,653 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:55,173 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:57,213 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:57,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:48:57,356 INFO L93 Difference]: Finished difference Result 1133 states and 1686 transitions. [2022-07-11 23:48:57,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-11 23:48:57,359 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 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 50 [2022-07-11 23:48:57,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:48:57,363 INFO L225 Difference]: With dead ends: 1133 [2022-07-11 23:48:57,363 INFO L226 Difference]: Without dead ends: 1128 [2022-07-11 23:48:57,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-07-11 23:48:57,364 INFO L413 NwaCegarLoop]: 830 mSDtfsCounter, 1117 mSDsluCounter, 2056 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 297 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 2886 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:48:57,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1207 Valid, 2886 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1060 Invalid, 4 Unknown, 0 Unchecked, 13.6s Time] [2022-07-11 23:48:57,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2022-07-11 23:48:57,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1063. [2022-07-11 23:48:57,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 854 states have (on average 1.4121779859484778) internal successors, (1206), 861 states have internal predecessors, (1206), 154 states have call successors, (154), 49 states have call predecessors, (154), 54 states have return successors, (210), 152 states have call predecessors, (210), 148 states have call successors, (210) [2022-07-11 23:48:57,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1570 transitions. [2022-07-11 23:48:57,404 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1570 transitions. Word has length 50 [2022-07-11 23:48:57,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:48:57,404 INFO L495 AbstractCegarLoop]: Abstraction has 1063 states and 1570 transitions. [2022-07-11 23:48:57,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 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) [2022-07-11 23:48:57,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1570 transitions. [2022-07-11 23:48:57,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-11 23:48:57,405 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:48:57,406 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:48:57,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-11 23:48:57,406 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:48:57,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:48:57,406 INFO L85 PathProgramCache]: Analyzing trace with hash -478429300, now seen corresponding path program 1 times [2022-07-11 23:48:57,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:48:57,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650039876] [2022-07-11 23:48:57,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:57,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:48:57,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:57,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-11 23:48:57,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:57,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-11 23:48:57,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:57,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:48:57,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:48:57,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650039876] [2022-07-11 23:48:57,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650039876] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:48:57,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:48:57,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:48:57,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103066724] [2022-07-11 23:48:57,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:48:57,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:48:57,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:48:57,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:48:57,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:48:57,507 INFO L87 Difference]: Start difference. First operand 1063 states and 1570 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 23:49:02,216 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 [] [2022-07-11 23:49:05,085 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:08,176 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:09,934 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:11,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:49:11,026 INFO L93 Difference]: Finished difference Result 2189 states and 3253 transitions. [2022-07-11 23:49:11,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:49:11,028 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2022-07-11 23:49:11,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:49:11,034 INFO L225 Difference]: With dead ends: 2189 [2022-07-11 23:49:11,034 INFO L226 Difference]: Without dead ends: 1130 [2022-07-11 23:49:11,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:49:11,037 INFO L413 NwaCegarLoop]: 833 mSDtfsCounter, 245 mSDsluCounter, 1626 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 238 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 2459 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:49:11,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 2459 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 640 Invalid, 3 Unknown, 0 Unchecked, 13.4s Time] [2022-07-11 23:49:11,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2022-07-11 23:49:11,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 1066. [2022-07-11 23:49:11,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 857 states have (on average 1.41073512252042) internal successors, (1209), 864 states have internal predecessors, (1209), 154 states have call successors, (154), 49 states have call predecessors, (154), 54 states have return successors, (210), 152 states have call predecessors, (210), 148 states have call successors, (210) [2022-07-11 23:49:11,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1573 transitions. [2022-07-11 23:49:11,102 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1573 transitions. Word has length 51 [2022-07-11 23:49:11,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:49:11,102 INFO L495 AbstractCegarLoop]: Abstraction has 1066 states and 1573 transitions. [2022-07-11 23:49:11,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 23:49:11,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1573 transitions. [2022-07-11 23:49:11,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-11 23:49:11,108 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:49:11,109 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:49:11,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-11 23:49:11,109 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:49:11,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:49:11,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1720167098, now seen corresponding path program 1 times [2022-07-11 23:49:11,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:49:11,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268520950] [2022-07-11 23:49:11,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:49:11,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:49:11,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:11,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-11 23:49:11,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:11,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-11 23:49:11,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:11,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 23:49:11,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:49:11,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268520950] [2022-07-11 23:49:11,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268520950] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:49:11,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127034900] [2022-07-11 23:49:11,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:49:11,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:49:11,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:49:11,261 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:49:11,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 23:49:11,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:11,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-11 23:49:11,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:49:11,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:49:11,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:49:11,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 23:49:11,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127034900] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:49:11,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:49:11,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-07-11 23:49:11,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140810290] [2022-07-11 23:49:11,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:49:11,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 23:49:11,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:49:11,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 23:49:11,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:49:11,794 INFO L87 Difference]: Start difference. First operand 1066 states and 1573 transitions. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 7 states have internal predecessors, (80), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-11 23:49:17,173 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:18,807 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:20,830 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:23,258 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:25,357 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:26,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:49:26,308 INFO L93 Difference]: Finished difference Result 2204 states and 3272 transitions. [2022-07-11 23:49:26,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:49:26,310 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 7 states have internal predecessors, (80), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2022-07-11 23:49:26,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:49:26,313 INFO L225 Difference]: With dead ends: 2204 [2022-07-11 23:49:26,313 INFO L226 Difference]: Without dead ends: 1143 [2022-07-11 23:49:26,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-07-11 23:49:26,316 INFO L413 NwaCegarLoop]: 831 mSDtfsCounter, 271 mSDsluCounter, 3042 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 262 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 3873 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:49:26,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 3873 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 994 Invalid, 3 Unknown, 0 Unchecked, 14.4s Time] [2022-07-11 23:49:26,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2022-07-11 23:49:26,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 1076. [2022-07-11 23:49:26,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 867 states have (on average 1.405997693194925) internal successors, (1219), 874 states have internal predecessors, (1219), 154 states have call successors, (154), 49 states have call predecessors, (154), 54 states have return successors, (210), 152 states have call predecessors, (210), 148 states have call successors, (210) [2022-07-11 23:49:26,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1583 transitions. [2022-07-11 23:49:26,353 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1583 transitions. Word has length 57 [2022-07-11 23:49:26,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:49:26,353 INFO L495 AbstractCegarLoop]: Abstraction has 1076 states and 1583 transitions. [2022-07-11 23:49:26,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 7 states have internal predecessors, (80), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-11 23:49:26,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1583 transitions. [2022-07-11 23:49:26,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-11 23:49:26,355 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:49:26,355 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:49:26,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-11 23:49:26,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-11 23:49:26,575 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:49:26,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:49:26,576 INFO L85 PathProgramCache]: Analyzing trace with hash 788337404, now seen corresponding path program 2 times [2022-07-11 23:49:26,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:49:26,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732584509] [2022-07-11 23:49:26,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:49:26,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:49:26,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:26,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-11 23:49:26,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:26,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-11 23:49:26,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:26,722 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-11 23:49:26,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:49:26,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732584509] [2022-07-11 23:49:26,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732584509] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:49:26,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051752098] [2022-07-11 23:49:26,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:49:26,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:49:26,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:49:26,724 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:49:26,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 23:49:27,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-11 23:49:27,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:49:27,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-11 23:49:27,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:49:27,076 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-11 23:49:27,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:49:27,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051752098] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:49:27,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 23:49:27,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-07-11 23:49:27,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557724271] [2022-07-11 23:49:27,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:49:27,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:49:27,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:49:27,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:49:27,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:49:27,077 INFO L87 Difference]: Start difference. First operand 1076 states and 1583 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-11 23:49:27,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:49:27,151 INFO L93 Difference]: Finished difference Result 1874 states and 2813 transitions. [2022-07-11 23:49:27,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:49:27,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67 [2022-07-11 23:49:27,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:49:27,155 INFO L225 Difference]: With dead ends: 1874 [2022-07-11 23:49:27,155 INFO L226 Difference]: Without dead ends: 1085 [2022-07-11 23:49:27,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-11 23:49:27,158 INFO L413 NwaCegarLoop]: 859 mSDtfsCounter, 2 mSDsluCounter, 1703 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2562 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:49:27,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2562 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:49:27,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2022-07-11 23:49:27,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 1085. [2022-07-11 23:49:27,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1085 states, 874 states have (on average 1.4050343249427917) internal successors, (1228), 883 states have internal predecessors, (1228), 154 states have call successors, (154), 49 states have call predecessors, (154), 56 states have return successors, (212), 152 states have call predecessors, (212), 148 states have call successors, (212) [2022-07-11 23:49:27,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1085 states to 1085 states and 1594 transitions. [2022-07-11 23:49:27,197 INFO L78 Accepts]: Start accepts. Automaton has 1085 states and 1594 transitions. Word has length 67 [2022-07-11 23:49:27,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:49:27,197 INFO L495 AbstractCegarLoop]: Abstraction has 1085 states and 1594 transitions. [2022-07-11 23:49:27,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-11 23:49:27,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1085 states and 1594 transitions. [2022-07-11 23:49:27,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-11 23:49:27,199 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:49:27,199 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:49:27,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-11 23:49:27,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-11 23:49:27,418 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:49:27,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:49:27,419 INFO L85 PathProgramCache]: Analyzing trace with hash -123842170, now seen corresponding path program 1 times [2022-07-11 23:49:27,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:49:27,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555359328] [2022-07-11 23:49:27,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:49:27,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:49:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:27,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 23:49:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:27,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-11 23:49:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:27,557 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-11 23:49:27,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:49:27,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555359328] [2022-07-11 23:49:27,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555359328] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:49:27,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:49:27,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-11 23:49:27,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472528617] [2022-07-11 23:49:27,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:49:27,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-11 23:49:27,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:49:27,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-11 23:49:27,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-11 23:49:27,559 INFO L87 Difference]: Start difference. First operand 1085 states and 1594 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 23:49:34,777 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:37,050 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:39,215 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:41,243 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:42,880 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:44,985 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:47,007 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 [] [2022-07-11 23:49:47,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:49:47,109 INFO L93 Difference]: Finished difference Result 1122 states and 1644 transitions. [2022-07-11 23:49:47,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-11 23:49:47,111 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 67 [2022-07-11 23:49:47,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:49:47,114 INFO L225 Difference]: With dead ends: 1122 [2022-07-11 23:49:47,114 INFO L226 Difference]: Without dead ends: 1107 [2022-07-11 23:49:47,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:49:47,115 INFO L413 NwaCegarLoop]: 843 mSDtfsCounter, 90 mSDsluCounter, 5401 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 105 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 6244 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:49:47,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 6244 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1469 Invalid, 6 Unknown, 0 Unchecked, 19.4s Time] [2022-07-11 23:49:47,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2022-07-11 23:49:47,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 1083. [2022-07-11 23:49:47,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 873 states have (on average 1.404352806414662) internal successors, (1226), 882 states have internal predecessors, (1226), 153 states have call successors, (153), 49 states have call predecessors, (153), 56 states have return successors, (211), 151 states have call predecessors, (211), 147 states have call successors, (211) [2022-07-11 23:49:47,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 1590 transitions. [2022-07-11 23:49:47,153 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 1590 transitions. Word has length 67 [2022-07-11 23:49:47,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:49:47,154 INFO L495 AbstractCegarLoop]: Abstraction has 1083 states and 1590 transitions. [2022-07-11 23:49:47,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 23:49:47,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 1590 transitions. [2022-07-11 23:49:47,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-11 23:49:47,169 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:49:47,169 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:49:47,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-11 23:49:47,169 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:49:47,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:49:47,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1285874888, now seen corresponding path program 1 times [2022-07-11 23:49:47,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:49:47,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025794507] [2022-07-11 23:49:47,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:49:47,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:49:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:47,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-11 23:49:47,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:47,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:49:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-11 23:49:47,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:49:47,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025794507] [2022-07-11 23:49:47,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025794507] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:49:47,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795158527] [2022-07-11 23:49:47,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:49:47,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:49:47,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:49:47,296 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:49:47,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 23:49:47,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:47,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-11 23:49:47,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:49:47,761 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-11 23:49:47,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:49:47,800 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-11 23:49:47,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795158527] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:49:47,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:49:47,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2022-07-11 23:49:47,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213467899] [2022-07-11 23:49:47,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:49:47,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-11 23:49:47,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:49:47,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-11 23:49:47,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-07-11 23:49:47,802 INFO L87 Difference]: Start difference. First operand 1083 states and 1590 transitions. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 9 states have internal predecessors, (72), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-11 23:49:53,890 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 [] [2022-07-11 23:49:56,090 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:58,134 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:59,777 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:01,844 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:03,984 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:05,672 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:05,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:50:05,753 INFO L93 Difference]: Finished difference Result 2223 states and 3269 transitions. [2022-07-11 23:50:05,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-11 23:50:05,755 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 9 states have internal predecessors, (72), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 68 [2022-07-11 23:50:05,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:50:05,758 INFO L225 Difference]: With dead ends: 2223 [2022-07-11 23:50:05,758 INFO L226 Difference]: Without dead ends: 1147 [2022-07-11 23:50:05,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-07-11 23:50:05,761 INFO L413 NwaCegarLoop]: 828 mSDtfsCounter, 277 mSDsluCounter, 3732 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 266 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 4560 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:50:05,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 4560 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1188 Invalid, 5 Unknown, 0 Unchecked, 17.8s Time] [2022-07-11 23:50:05,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-07-11 23:50:05,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1097. [2022-07-11 23:50:05,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 887 states have (on average 1.3979706877113867) internal successors, (1240), 896 states have internal predecessors, (1240), 153 states have call successors, (153), 49 states have call predecessors, (153), 56 states have return successors, (211), 151 states have call predecessors, (211), 147 states have call successors, (211) [2022-07-11 23:50:05,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1604 transitions. [2022-07-11 23:50:05,802 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1604 transitions. Word has length 68 [2022-07-11 23:50:05,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:50:05,802 INFO L495 AbstractCegarLoop]: Abstraction has 1097 states and 1604 transitions. [2022-07-11 23:50:05,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 9 states have internal predecessors, (72), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-11 23:50:05,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1604 transitions. [2022-07-11 23:50:05,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-11 23:50:05,804 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:50:05,804 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:50:05,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-11 23:50:06,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:50:06,028 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:50:06,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:50:06,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1011931974, now seen corresponding path program 2 times [2022-07-11 23:50:06,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:50:06,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58997696] [2022-07-11 23:50:06,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:50:06,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:50:06,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:06,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-11 23:50:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:06,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-11 23:50:06,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-11 23:50:06,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:50:06,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58997696] [2022-07-11 23:50:06,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58997696] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:50:06,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556890732] [2022-07-11 23:50:06,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:50:06,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:50:06,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:50:06,228 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:50:06,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 23:50:06,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:50:06,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:50:06,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-11 23:50:06,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:50:06,794 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-11 23:50:06,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:50:06,867 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-11 23:50:06,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556890732] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:50:06,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:50:06,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2022-07-11 23:50:06,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102706154] [2022-07-11 23:50:06,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:50:06,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-11 23:50:06,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:50:06,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-11 23:50:06,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2022-07-11 23:50:06,868 INFO L87 Difference]: Start difference. First operand 1097 states and 1604 transitions. Second operand has 15 states, 15 states have (on average 6.2) internal successors, (93), 13 states have internal predecessors, (93), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-11 23:50:13,126 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:15,303 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:17,326 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:18,555 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:21,378 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:23,196 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:23,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:50:23,289 INFO L93 Difference]: Finished difference Result 2263 states and 3319 transitions. [2022-07-11 23:50:23,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-11 23:50:23,291 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 13 states have internal predecessors, (93), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 82 [2022-07-11 23:50:23,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:50:23,294 INFO L225 Difference]: With dead ends: 2263 [2022-07-11 23:50:23,294 INFO L226 Difference]: Without dead ends: 1181 [2022-07-11 23:50:23,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-07-11 23:50:23,296 INFO L413 NwaCegarLoop]: 829 mSDtfsCounter, 330 mSDsluCounter, 3734 mSDsCounter, 0 mSdLazyCounter, 1415 mSolverCounterSat, 333 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 4563 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 1415 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:50:23,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 4563 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 1415 Invalid, 4 Unknown, 0 Unchecked, 16.2s Time] [2022-07-11 23:50:23,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2022-07-11 23:50:23,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1133. [2022-07-11 23:50:23,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 923 states have (on average 1.3824485373781148) internal successors, (1276), 932 states have internal predecessors, (1276), 153 states have call successors, (153), 49 states have call predecessors, (153), 56 states have return successors, (211), 151 states have call predecessors, (211), 147 states have call successors, (211) [2022-07-11 23:50:23,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 1640 transitions. [2022-07-11 23:50:23,341 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 1640 transitions. Word has length 82 [2022-07-11 23:50:23,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:50:23,342 INFO L495 AbstractCegarLoop]: Abstraction has 1133 states and 1640 transitions. [2022-07-11 23:50:23,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 13 states have internal predecessors, (93), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-11 23:50:23,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 1640 transitions. [2022-07-11 23:50:23,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-11 23:50:23,345 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:50:23,345 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:50:23,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-11 23:50:23,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-11 23:50:23,565 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:50:23,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:50:23,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1191219690, now seen corresponding path program 3 times [2022-07-11 23:50:23,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:50:23,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244210870] [2022-07-11 23:50:23,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:50:23,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:50:23,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:23,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-11 23:50:23,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:23,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-07-11 23:50:23,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2022-07-11 23:50:23,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:50:23,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244210870] [2022-07-11 23:50:23,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244210870] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:50:23,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224496492] [2022-07-11 23:50:23,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:50:23,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:50:23,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:50:23,864 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:50:23,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-11 23:50:24,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-11 23:50:24,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:50:24,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-11 23:50:24,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:50:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2022-07-11 23:50:24,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:50:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2022-07-11 23:50:24,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224496492] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:50:24,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:50:24,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5, 5] total 22 [2022-07-11 23:50:24,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803109447] [2022-07-11 23:50:24,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:50:24,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-11 23:50:24,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:50:24,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-11 23:50:24,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-07-11 23:50:24,651 INFO L87 Difference]: Start difference. First operand 1133 states and 1640 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 20 states have internal predecessors, (108), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-11 23:50:31,650 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:33,765 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:35,788 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:38,075 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:39,614 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:41,203 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:41,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:50:41,463 INFO L93 Difference]: Finished difference Result 2327 states and 3405 transitions. [2022-07-11 23:50:41,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-11 23:50:41,465 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 20 states have internal predecessors, (108), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 118 [2022-07-11 23:50:41,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:50:41,468 INFO L225 Difference]: With dead ends: 2327 [2022-07-11 23:50:41,468 INFO L226 Difference]: Without dead ends: 1213 [2022-07-11 23:50:41,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2022-07-11 23:50:41,470 INFO L413 NwaCegarLoop]: 819 mSDtfsCounter, 319 mSDsluCounter, 5150 mSDsCounter, 0 mSdLazyCounter, 2518 mSolverCounterSat, 339 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 5969 SdHoareTripleChecker+Invalid, 2861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 2518 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:50:41,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 5969 Invalid, 2861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 2518 Invalid, 4 Unknown, 0 Unchecked, 16.5s Time] [2022-07-11 23:50:41,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-07-11 23:50:41,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1160. [2022-07-11 23:50:41,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 948 states have (on average 1.3850210970464134) internal successors, (1313), 957 states have internal predecessors, (1313), 153 states have call successors, (153), 51 states have call predecessors, (153), 58 states have return successors, (213), 151 states have call predecessors, (213), 147 states have call successors, (213) [2022-07-11 23:50:41,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1679 transitions. [2022-07-11 23:50:41,514 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1679 transitions. Word has length 118 [2022-07-11 23:50:41,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:50:41,514 INFO L495 AbstractCegarLoop]: Abstraction has 1160 states and 1679 transitions. [2022-07-11 23:50:41,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 20 states have internal predecessors, (108), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-11 23:50:41,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1679 transitions. [2022-07-11 23:50:41,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-11 23:50:41,516 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:50:41,516 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:50:41,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-11 23:50:41,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-11 23:50:41,736 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:50:41,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:50:41,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1808122274, now seen corresponding path program 1 times [2022-07-11 23:50:41,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:50:41,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085553002] [2022-07-11 23:50:41,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:50:41,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:50:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:41,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-07-11 23:50:41,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:41,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-11 23:50:41,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:41,911 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2022-07-11 23:50:41,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:50:41,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085553002] [2022-07-11 23:50:41,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085553002] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:50:41,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:50:41,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-11 23:50:41,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152655480] [2022-07-11 23:50:41,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:50:41,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-11 23:50:41,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:50:41,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-11 23:50:41,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-11 23:50:41,914 INFO L87 Difference]: Start difference. First operand 1160 states and 1679 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 7 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 23:50:48,821 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:50,405 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:52,429 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:54,852 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:56,563 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:57,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:50:57,409 INFO L93 Difference]: Finished difference Result 1200 states and 1732 transitions. [2022-07-11 23:50:57,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-11 23:50:57,411 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 7 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 125 [2022-07-11 23:50:57,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:50:57,413 INFO L225 Difference]: With dead ends: 1200 [2022-07-11 23:50:57,413 INFO L226 Difference]: Without dead ends: 1185 [2022-07-11 23:50:57,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:50:57,414 INFO L413 NwaCegarLoop]: 834 mSDtfsCounter, 90 mSDsluCounter, 5354 mSDsCounter, 0 mSdLazyCounter, 1460 mSolverCounterSat, 104 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 6188 SdHoareTripleChecker+Invalid, 1567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1460 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:50:57,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 6188 Invalid, 1567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1460 Invalid, 3 Unknown, 0 Unchecked, 15.4s Time] [2022-07-11 23:50:57,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2022-07-11 23:50:57,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1157. [2022-07-11 23:50:57,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 946 states have (on average 1.3847780126849893) internal successors, (1310), 955 states have internal predecessors, (1310), 152 states have call successors, (152), 51 states have call predecessors, (152), 58 states have return successors, (212), 150 states have call predecessors, (212), 146 states have call successors, (212) [2022-07-11 23:50:57,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 1674 transitions. [2022-07-11 23:50:57,457 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 1674 transitions. Word has length 125 [2022-07-11 23:50:57,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:50:57,457 INFO L495 AbstractCegarLoop]: Abstraction has 1157 states and 1674 transitions. [2022-07-11 23:50:57,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 7 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 23:50:57,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 1674 transitions. [2022-07-11 23:50:57,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-07-11 23:50:57,459 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:50:57,459 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:50:57,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-11 23:50:57,460 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:50:57,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:50:57,460 INFO L85 PathProgramCache]: Analyzing trace with hash 266529286, now seen corresponding path program 1 times [2022-07-11 23:50:57,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:50:57,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061891621] [2022-07-11 23:50:57,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:50:57,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:50:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:57,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-07-11 23:50:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:57,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-11 23:50:57,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:57,633 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2022-07-11 23:50:57,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:50:57,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061891621] [2022-07-11 23:50:57,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061891621] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:50:57,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:50:57,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-11 23:50:57,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642410526] [2022-07-11 23:50:57,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:50:57,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-11 23:50:57,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:50:57,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-11 23:50:57,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-11 23:50:57,635 INFO L87 Difference]: Start difference. First operand 1157 states and 1674 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 23:51:05,426 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 [] [2022-07-11 23:51:07,528 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:51:09,034 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:51:12,027 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:51:14,146 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:51:16,176 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:51:16,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:51:16,302 INFO L93 Difference]: Finished difference Result 1199 states and 1729 transitions. [2022-07-11 23:51:16,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-11 23:51:16,305 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 126 [2022-07-11 23:51:16,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:51:16,309 INFO L225 Difference]: With dead ends: 1199 [2022-07-11 23:51:16,309 INFO L226 Difference]: Without dead ends: 1182 [2022-07-11 23:51:16,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-07-11 23:51:16,310 INFO L413 NwaCegarLoop]: 836 mSDtfsCounter, 101 mSDsluCounter, 6073 mSDsCounter, 0 mSdLazyCounter, 1614 mSolverCounterSat, 103 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 6909 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1614 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:51:16,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 6909 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1614 Invalid, 5 Unknown, 0 Unchecked, 18.6s Time] [2022-07-11 23:51:16,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2022-07-11 23:51:16,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1154. [2022-07-11 23:51:16,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 944 states have (on average 1.3845338983050848) internal successors, (1307), 953 states have internal predecessors, (1307), 151 states have call successors, (151), 51 states have call predecessors, (151), 58 states have return successors, (211), 149 states have call predecessors, (211), 145 states have call successors, (211) [2022-07-11 23:51:16,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1669 transitions. [2022-07-11 23:51:16,387 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1669 transitions. Word has length 126 [2022-07-11 23:51:16,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:51:16,387 INFO L495 AbstractCegarLoop]: Abstraction has 1154 states and 1669 transitions. [2022-07-11 23:51:16,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 23:51:16,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1669 transitions. [2022-07-11 23:51:16,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-11 23:51:16,391 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:51:16,392 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:51:16,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-11 23:51:16,392 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:51:16,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:51:16,393 INFO L85 PathProgramCache]: Analyzing trace with hash -434812860, now seen corresponding path program 4 times [2022-07-11 23:51:16,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:51:16,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548579832] [2022-07-11 23:51:16,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:51:16,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:51:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:51:16,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-11 23:51:16,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:51:16,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-07-11 23:51:16,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:51:16,793 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2022-07-11 23:51:16,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:51:16,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548579832] [2022-07-11 23:51:16,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548579832] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:51:16,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679656386] [2022-07-11 23:51:16,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:51:16,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:51:16,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:51:16,808 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:51:16,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-11 23:51:17,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:51:17,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:51:17,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-11 23:51:17,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:51:17,497 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2022-07-11 23:51:17,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:51:17,700 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2022-07-11 23:51:17,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679656386] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:51:17,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:51:17,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 8] total 24 [2022-07-11 23:51:17,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977936388] [2022-07-11 23:51:17,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:51:17,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-11 23:51:17,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:51:17,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-11 23:51:17,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-07-11 23:51:17,701 INFO L87 Difference]: Start difference. First operand 1154 states and 1669 transitions. Second operand has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 22 states have internal predecessors, (115), 2 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-11 23:51:27,864 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 [] [2022-07-11 23:51:30,752 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:51:33,269 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:51:35,012 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []