./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ntdrivers-simplified/cdaudio_simpl1.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ntdrivers-simplified/cdaudio_simpl1.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 75fd132a1a39ad1f2927845122893235fdf65fe2225472c79a2e84525dcd60fe --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 10:53:56,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 10:53:56,078 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 10:53:56,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 10:53:56,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 10:53:56,130 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 10:53:56,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 10:53:56,134 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 10:53:56,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 10:53:56,140 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 10:53:56,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 10:53:56,142 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 10:53:56,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 10:53:56,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 10:53:56,145 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 10:53:56,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 10:53:56,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 10:53:56,150 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 10:53:56,151 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 10:53:56,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 10:53:56,159 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 10:53:56,160 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 10:53:56,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 10:53:56,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 10:53:56,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 10:53:56,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 10:53:56,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 10:53:56,166 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 10:53:56,167 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 10:53:56,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 10:53:56,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 10:53:56,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 10:53:56,170 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 10:53:56,171 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 10:53:56,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 10:53:56,172 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 10:53:56,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 10:53:56,173 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 10:53:56,173 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 10:53:56,174 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 10:53:56,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 10:53:56,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 10:53:56,177 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 10:53:56,205 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 10:53:56,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 10:53:56,206 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 10:53:56,206 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 10:53:56,207 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 10:53:56,207 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 10:53:56,208 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 10:53:56,208 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 10:53:56,208 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 10:53:56,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 10:53:56,209 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 10:53:56,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 10:53:56,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 10:53:56,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 10:53:56,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 10:53:56,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 10:53:56,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 10:53:56,210 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 10:53:56,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 10:53:56,211 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 10:53:56,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 10:53:56,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 10:53:56,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 10:53:56,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 10:53:56,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:53:56,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 10:53:56,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 10:53:56,213 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 10:53:56,213 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 10:53:56,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 10:53:56,214 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 10:53:56,214 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 10:53:56,214 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 10:53:56,214 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 75fd132a1a39ad1f2927845122893235fdf65fe2225472c79a2e84525dcd60fe [2022-07-19 10:53:56,462 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 10:53:56,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 10:53:56,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 10:53:56,488 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 10:53:56,488 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 10:53:56,489 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers-simplified/cdaudio_simpl1.cil-2.c [2022-07-19 10:53:56,543 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f78a73bc7/8148968e073e4fe59d9fe7a8c11044b7/FLAG69caf0e90 [2022-07-19 10:53:57,045 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 10:53:57,046 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers-simplified/cdaudio_simpl1.cil-2.c [2022-07-19 10:53:57,070 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f78a73bc7/8148968e073e4fe59d9fe7a8c11044b7/FLAG69caf0e90 [2022-07-19 10:53:57,355 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f78a73bc7/8148968e073e4fe59d9fe7a8c11044b7 [2022-07-19 10:53:57,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 10:53:57,358 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 10:53:57,360 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 10:53:57,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 10:53:57,363 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 10:53:57,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:53:57" (1/1) ... [2022-07-19 10:53:57,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a288faa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:53:57, skipping insertion in model container [2022-07-19 10:53:57,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:53:57" (1/1) ... [2022-07-19 10:53:57,371 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 10:53:57,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 10:53:57,608 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-simplified/cdaudio_simpl1.cil-2.c[2073,2086] [2022-07-19 10:53:57,751 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:53:57,758 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 10:53:57,770 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-simplified/cdaudio_simpl1.cil-2.c[2073,2086] [2022-07-19 10:53:57,861 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:53:57,877 INFO L208 MainTranslator]: Completed translation [2022-07-19 10:53:57,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:53:57 WrapperNode [2022-07-19 10:53:57,877 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 10:53:57,878 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 10:53:57,878 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 10:53:57,879 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 10:53:57,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:53:57" (1/1) ... [2022-07-19 10:53:57,934 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:53:57" (1/1) ... [2022-07-19 10:53:58,005 INFO L137 Inliner]: procedures = 41, calls = 107, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 1581 [2022-07-19 10:53:58,005 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 10:53:58,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 10:53:58,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 10:53:58,006 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 10:53:58,013 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:53:57" (1/1) ... [2022-07-19 10:53:58,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:53:57" (1/1) ... [2022-07-19 10:53:58,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:53:57" (1/1) ... [2022-07-19 10:53:58,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:53:57" (1/1) ... [2022-07-19 10:53:58,045 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:53:57" (1/1) ... [2022-07-19 10:53:58,061 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:53:57" (1/1) ... [2022-07-19 10:53:58,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:53:57" (1/1) ... [2022-07-19 10:53:58,084 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 10:53:58,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 10:53:58,101 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 10:53:58,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 10:53:58,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:53:57" (1/1) ... [2022-07-19 10:53:58,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:53:58,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:53:58,133 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 10:53:58,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 10:53:58,171 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2022-07-19 10:53:58,171 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2022-07-19 10:53:58,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 10:53:58,171 INFO L130 BoogieDeclarations]: Found specification of procedure AG_SetStatusAndReturn [2022-07-19 10:53:58,171 INFO L138 BoogieDeclarations]: Found implementation of procedure AG_SetStatusAndReturn [2022-07-19 10:53:58,172 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-07-19 10:53:58,172 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-07-19 10:53:58,172 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2022-07-19 10:53:58,172 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2022-07-19 10:53:58,173 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-07-19 10:53:58,173 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-07-19 10:53:58,173 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-07-19 10:53:58,173 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-07-19 10:53:58,173 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2022-07-19 10:53:58,173 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2022-07-19 10:53:58,173 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-07-19 10:53:58,174 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-07-19 10:53:58,174 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2022-07-19 10:53:58,174 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2022-07-19 10:53:58,188 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-07-19 10:53:58,188 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-07-19 10:53:58,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 10:53:58,188 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-07-19 10:53:58,189 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-07-19 10:53:58,189 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2022-07-19 10:53:58,189 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2022-07-19 10:53:58,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 10:53:58,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 10:53:58,189 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2022-07-19 10:53:58,189 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2022-07-19 10:53:58,440 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 10:53:58,442 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 10:53:58,568 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:53:58,626 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-07-19 10:53:58,627 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-07-19 10:53:58,694 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:53:58,720 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-07-19 10:53:58,720 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-07-19 10:53:58,726 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:53:58,727 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:53:58,729 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:53:58,738 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:53:58,755 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:53:58,767 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:53:58,775 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:53:59,304 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint L305: CdAudioPnp_#res#1 := 0; [2022-07-19 10:53:59,305 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##258: assume !false; [2022-07-19 10:53:59,305 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##257: assume false; [2022-07-19 10:53:59,305 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##286: assume !false; [2022-07-19 10:53:59,305 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##285: assume false; [2022-07-19 10:53:59,305 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume !false; [2022-07-19 10:53:59,306 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##46: assume false; [2022-07-19 10:53:59,306 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##133: assume false; [2022-07-19 10:53:59,306 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##134: assume !false; [2022-07-19 10:53:59,307 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##25: assume !false; [2022-07-19 10:53:59,307 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume false; [2022-07-19 10:53:59,307 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2022-07-19 10:53:59,308 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2022-07-19 10:53:59,308 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##331: assume false; [2022-07-19 10:53:59,308 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##332: assume !false; [2022-07-19 10:53:59,340 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 10:53:59,349 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 10:53:59,350 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 10:53:59,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:53:59 BoogieIcfgContainer [2022-07-19 10:53:59,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 10:53:59,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 10:53:59,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 10:53:59,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 10:53:59,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 10:53:57" (1/3) ... [2022-07-19 10:53:59,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@239ba2e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:53:59, skipping insertion in model container [2022-07-19 10:53:59,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:53:57" (2/3) ... [2022-07-19 10:53:59,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@239ba2e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:53:59, skipping insertion in model container [2022-07-19 10:53:59,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:53:59" (3/3) ... [2022-07-19 10:53:59,360 INFO L111 eAbstractionObserver]: Analyzing ICFG cdaudio_simpl1.cil-2.c [2022-07-19 10:53:59,372 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 10:53:59,372 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 10:53:59,418 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 10:53:59,423 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@708b31fb, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@71caf926 [2022-07-19 10:53:59,424 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 10:53:59,429 INFO L276 IsEmpty]: Start isEmpty. Operand has 468 states, 367 states have (on average 1.5068119891008174) internal successors, (553), 385 states have internal predecessors, (553), 86 states have call successors, (86), 13 states have call predecessors, (86), 13 states have return successors, (86), 82 states have call predecessors, (86), 86 states have call successors, (86) [2022-07-19 10:53:59,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-19 10:53:59,436 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:53:59,437 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:53:59,437 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:53:59,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:53:59,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1469618272, now seen corresponding path program 1 times [2022-07-19 10:53:59,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:53:59,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491685806] [2022-07-19 10:53:59,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:53:59,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:53:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:53:59,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:53:59,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:53:59,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491685806] [2022-07-19 10:53:59,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491685806] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:53:59,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:53:59,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:53:59,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955530094] [2022-07-19 10:53:59,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:53:59,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:53:59,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:53:59,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:53:59,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:53:59,634 INFO L87 Difference]: Start difference. First operand has 468 states, 367 states have (on average 1.5068119891008174) internal successors, (553), 385 states have internal predecessors, (553), 86 states have call successors, (86), 13 states have call predecessors, (86), 13 states have return successors, (86), 82 states have call predecessors, (86), 86 states have call successors, (86) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:53:59,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:53:59,792 INFO L93 Difference]: Finished difference Result 809 states and 1294 transitions. [2022-07-19 10:53:59,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:53:59,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-19 10:53:59,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:53:59,817 INFO L225 Difference]: With dead ends: 809 [2022-07-19 10:53:59,817 INFO L226 Difference]: Without dead ends: 461 [2022-07-19 10:53:59,825 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 [2022-07-19 10:53:59,828 INFO L413 NwaCegarLoop]: 700 mSDtfsCounter, 8 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:53:59,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1351 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:53:59,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-07-19 10:53:59,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 461. [2022-07-19 10:53:59,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 362 states have (on average 1.4751381215469612) internal successors, (534), 378 states have internal predecessors, (534), 86 states have call successors, (86), 13 states have call predecessors, (86), 12 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2022-07-19 10:53:59,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 691 transitions. [2022-07-19 10:53:59,906 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 691 transitions. Word has length 13 [2022-07-19 10:53:59,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:53:59,906 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 691 transitions. [2022-07-19 10:53:59,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:53:59,907 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 691 transitions. [2022-07-19 10:53:59,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-19 10:53:59,908 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:53:59,908 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:53:59,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 10:53:59,909 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:53:59,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:53:59,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1712840026, now seen corresponding path program 1 times [2022-07-19 10:53:59,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:53:59,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096287656] [2022-07-19 10:53:59,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:53:59,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:53:59,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:53:59,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:53:59,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:53:59,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096287656] [2022-07-19 10:53:59,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096287656] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:53:59,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:53:59,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:53:59,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202909929] [2022-07-19 10:53:59,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:53:59,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:53:59,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:53:59,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:53:59,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:53:59,981 INFO L87 Difference]: Start difference. First operand 461 states and 691 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:54:00,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:00,161 INFO L93 Difference]: Finished difference Result 702 states and 1030 transitions. [2022-07-19 10:54:00,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:54:00,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-19 10:54:00,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:00,167 INFO L225 Difference]: With dead ends: 702 [2022-07-19 10:54:00,167 INFO L226 Difference]: Without dead ends: 597 [2022-07-19 10:54:00,168 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 [2022-07-19 10:54:00,169 INFO L413 NwaCegarLoop]: 812 mSDtfsCounter, 566 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:00,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 1036 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:54:00,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-07-19 10:54:00,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 579. [2022-07-19 10:54:00,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 466 states have (on average 1.4356223175965666) internal successors, (669), 468 states have internal predecessors, (669), 92 states have call successors, (92), 21 states have call predecessors, (92), 20 states have return successors, (97), 91 states have call predecessors, (97), 81 states have call successors, (97) [2022-07-19 10:54:00,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 858 transitions. [2022-07-19 10:54:00,203 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 858 transitions. Word has length 15 [2022-07-19 10:54:00,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:00,203 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 858 transitions. [2022-07-19 10:54:00,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:54:00,203 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 858 transitions. [2022-07-19 10:54:00,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-19 10:54:00,205 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:00,205 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:00,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 10:54:00,205 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:00,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:00,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1723202730, now seen corresponding path program 1 times [2022-07-19 10:54:00,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:00,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772609433] [2022-07-19 10:54:00,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:00,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:00,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:00,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772609433] [2022-07-19 10:54:00,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772609433] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:00,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:00,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:54:00,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566787477] [2022-07-19 10:54:00,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:00,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:54:00,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:00,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:54:00,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:54:00,288 INFO L87 Difference]: Start difference. First operand 579 states and 858 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2022-07-19 10:54:00,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:00,325 INFO L93 Difference]: Finished difference Result 858 states and 1241 transitions. [2022-07-19 10:54:00,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:54:00,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 19 [2022-07-19 10:54:00,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:00,330 INFO L225 Difference]: With dead ends: 858 [2022-07-19 10:54:00,330 INFO L226 Difference]: Without dead ends: 723 [2022-07-19 10:54:00,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:54:00,332 INFO L413 NwaCegarLoop]: 681 mSDtfsCounter, 605 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 868 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 [2022-07-19 10:54:00,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [605 Valid, 868 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:54:00,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-07-19 10:54:00,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 687. [2022-07-19 10:54:00,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 564 states have (on average 1.4326241134751774) internal successors, (808), 562 states have internal predecessors, (808), 93 states have call successors, (93), 26 states have call predecessors, (93), 29 states have return successors, (110), 98 states have call predecessors, (110), 85 states have call successors, (110) [2022-07-19 10:54:00,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 1011 transitions. [2022-07-19 10:54:00,366 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 1011 transitions. Word has length 19 [2022-07-19 10:54:00,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:00,366 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 1011 transitions. [2022-07-19 10:54:00,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2022-07-19 10:54:00,367 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 1011 transitions. [2022-07-19 10:54:00,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-19 10:54:00,368 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:00,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:00,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 10:54:00,369 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:00,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:00,370 INFO L85 PathProgramCache]: Analyzing trace with hash 981092466, now seen corresponding path program 1 times [2022-07-19 10:54:00,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:00,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512442672] [2022-07-19 10:54:00,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:00,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:00,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:00,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:00,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512442672] [2022-07-19 10:54:00,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512442672] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:00,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:00,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:54:00,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854974060] [2022-07-19 10:54:00,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:00,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:54:00,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:00,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:54:00,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:54:00,408 INFO L87 Difference]: Start difference. First operand 687 states and 1011 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2022-07-19 10:54:00,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:00,562 INFO L93 Difference]: Finished difference Result 1290 states and 1958 transitions. [2022-07-19 10:54:00,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:54:00,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 21 [2022-07-19 10:54:00,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:00,569 INFO L225 Difference]: With dead ends: 1290 [2022-07-19 10:54:00,569 INFO L226 Difference]: Without dead ends: 1057 [2022-07-19 10:54:00,570 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 [2022-07-19 10:54:00,571 INFO L413 NwaCegarLoop]: 1006 mSDtfsCounter, 338 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 1622 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:00,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 1622 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:54:00,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2022-07-19 10:54:00,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 819. [2022-07-19 10:54:00,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 673 states have (on average 1.4338781575037147) internal successors, (965), 670 states have internal predecessors, (965), 106 states have call successors, (106), 34 states have call predecessors, (106), 39 states have return successors, (172), 114 states have call predecessors, (172), 98 states have call successors, (172) [2022-07-19 10:54:00,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1243 transitions. [2022-07-19 10:54:00,615 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1243 transitions. Word has length 21 [2022-07-19 10:54:00,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:00,616 INFO L495 AbstractCegarLoop]: Abstraction has 819 states and 1243 transitions. [2022-07-19 10:54:00,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2022-07-19 10:54:00,616 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1243 transitions. [2022-07-19 10:54:00,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-19 10:54:00,617 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:00,618 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] [2022-07-19 10:54:00,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 10:54:00,618 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:00,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:00,619 INFO L85 PathProgramCache]: Analyzing trace with hash 110549048, now seen corresponding path program 1 times [2022-07-19 10:54:00,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:00,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92451781] [2022-07-19 10:54:00,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:00,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:00,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:00,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:00,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:00,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92451781] [2022-07-19 10:54:00,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92451781] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:00,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:00,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:54:00,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752275298] [2022-07-19 10:54:00,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:00,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:54:00,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:00,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:54:00,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:54:00,726 INFO L87 Difference]: Start difference. First operand 819 states and 1243 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:54:01,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:01,077 INFO L93 Difference]: Finished difference Result 1372 states and 2088 transitions. [2022-07-19 10:54:01,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:54:01,077 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-19 10:54:01,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:01,082 INFO L225 Difference]: With dead ends: 1372 [2022-07-19 10:54:01,082 INFO L226 Difference]: Without dead ends: 829 [2022-07-19 10:54:01,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:54:01,085 INFO L413 NwaCegarLoop]: 718 mSDtfsCounter, 1026 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1027 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:01,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1027 Valid, 870 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:54:01,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-07-19 10:54:01,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 807. [2022-07-19 10:54:01,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 663 states have (on average 1.4283559577677225) internal successors, (947), 660 states have internal predecessors, (947), 104 states have call successors, (104), 32 states have call predecessors, (104), 39 states have return successors, (168), 114 states have call predecessors, (168), 96 states have call successors, (168) [2022-07-19 10:54:01,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1219 transitions. [2022-07-19 10:54:01,125 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1219 transitions. Word has length 22 [2022-07-19 10:54:01,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:01,125 INFO L495 AbstractCegarLoop]: Abstraction has 807 states and 1219 transitions. [2022-07-19 10:54:01,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:54:01,126 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1219 transitions. [2022-07-19 10:54:01,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-19 10:54:01,127 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:01,127 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] [2022-07-19 10:54:01,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 10:54:01,128 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:01,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:01,129 INFO L85 PathProgramCache]: Analyzing trace with hash -401986644, now seen corresponding path program 1 times [2022-07-19 10:54:01,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:01,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271701867] [2022-07-19 10:54:01,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:01,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:01,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:01,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:01,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:01,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271701867] [2022-07-19 10:54:01,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271701867] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:01,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:01,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:54:01,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510027156] [2022-07-19 10:54:01,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:01,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:54:01,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:01,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:54:01,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:54:01,159 INFO L87 Difference]: Start difference. First operand 807 states and 1219 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-07-19 10:54:01,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:01,245 INFO L93 Difference]: Finished difference Result 810 states and 1221 transitions. [2022-07-19 10:54:01,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:54:01,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-19 10:54:01,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:01,250 INFO L225 Difference]: With dead ends: 810 [2022-07-19 10:54:01,250 INFO L226 Difference]: Without dead ends: 806 [2022-07-19 10:54:01,251 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 [2022-07-19 10:54:01,251 INFO L413 NwaCegarLoop]: 649 mSDtfsCounter, 22 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1252 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 [2022-07-19 10:54:01,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 1252 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:54:01,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-07-19 10:54:01,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 806. [2022-07-19 10:54:01,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 663 states have (on average 1.4253393665158371) internal successors, (945), 659 states have internal predecessors, (945), 103 states have call successors, (103), 32 states have call predecessors, (103), 39 states have return successors, (168), 114 states have call predecessors, (168), 96 states have call successors, (168) [2022-07-19 10:54:01,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1216 transitions. [2022-07-19 10:54:01,288 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1216 transitions. Word has length 23 [2022-07-19 10:54:01,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:01,288 INFO L495 AbstractCegarLoop]: Abstraction has 806 states and 1216 transitions. [2022-07-19 10:54:01,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-07-19 10:54:01,289 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1216 transitions. [2022-07-19 10:54:01,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-19 10:54:01,290 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:01,291 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] [2022-07-19 10:54:01,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 10:54:01,291 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:01,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:01,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1420935661, now seen corresponding path program 1 times [2022-07-19 10:54:01,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:01,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438809159] [2022-07-19 10:54:01,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:01,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:01,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:01,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:01,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438809159] [2022-07-19 10:54:01,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438809159] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:01,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:01,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:54:01,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394636480] [2022-07-19 10:54:01,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:01,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:54:01,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:01,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:54:01,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:54:01,339 INFO L87 Difference]: Start difference. First operand 806 states and 1216 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:54:01,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:01,440 INFO L93 Difference]: Finished difference Result 1220 states and 1776 transitions. [2022-07-19 10:54:01,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 10:54:01,441 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-19 10:54:01,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:01,446 INFO L225 Difference]: With dead ends: 1220 [2022-07-19 10:54:01,446 INFO L226 Difference]: Without dead ends: 806 [2022-07-19 10:54:01,448 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 [2022-07-19 10:54:01,450 INFO L413 NwaCegarLoop]: 757 mSDtfsCounter, 318 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 1941 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:01,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 1941 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:54:01,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-07-19 10:54:01,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 681. [2022-07-19 10:54:01,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 559 states have (on average 1.407871198568873) internal successors, (787), 557 states have internal predecessors, (787), 88 states have call successors, (88), 28 states have call predecessors, (88), 33 states have return successors, (109), 95 states have call predecessors, (109), 81 states have call successors, (109) [2022-07-19 10:54:01,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 984 transitions. [2022-07-19 10:54:01,492 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 984 transitions. Word has length 28 [2022-07-19 10:54:01,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:01,494 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 984 transitions. [2022-07-19 10:54:01,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:54:01,494 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 984 transitions. [2022-07-19 10:54:01,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-19 10:54:01,497 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:01,497 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:01,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 10:54:01,498 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:01,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:01,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1565251403, now seen corresponding path program 1 times [2022-07-19 10:54:01,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:01,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319762428] [2022-07-19 10:54:01,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:01,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:01,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:01,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:01,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319762428] [2022-07-19 10:54:01,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319762428] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:01,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:01,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:54:01,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333430523] [2022-07-19 10:54:01,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:01,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:54:01,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:01,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:54:01,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:54:01,549 INFO L87 Difference]: Start difference. First operand 681 states and 984 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, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:54:01,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:01,588 INFO L93 Difference]: Finished difference Result 764 states and 1091 transitions. [2022-07-19 10:54:01,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:54:01,589 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, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-19 10:54:01,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:01,593 INFO L225 Difference]: With dead ends: 764 [2022-07-19 10:54:01,593 INFO L226 Difference]: Without dead ends: 746 [2022-07-19 10:54:01,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:54:01,594 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 628 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:01,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [628 Valid, 716 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:54:01,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-07-19 10:54:01,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 703. [2022-07-19 10:54:01,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 579 states have (on average 1.4162348877374784) internal successors, (820), 584 states have internal predecessors, (820), 88 states have call successors, (88), 29 states have call predecessors, (88), 35 states have return successors, (104), 89 states have call predecessors, (104), 82 states have call successors, (104) [2022-07-19 10:54:01,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1012 transitions. [2022-07-19 10:54:01,634 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1012 transitions. Word has length 29 [2022-07-19 10:54:01,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:01,635 INFO L495 AbstractCegarLoop]: Abstraction has 703 states and 1012 transitions. [2022-07-19 10:54:01,635 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, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:54:01,636 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1012 transitions. [2022-07-19 10:54:01,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-19 10:54:01,639 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:01,639 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] [2022-07-19 10:54:01,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 10:54:01,640 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:01,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:01,640 INFO L85 PathProgramCache]: Analyzing trace with hash 18714975, now seen corresponding path program 1 times [2022-07-19 10:54:01,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:01,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431161097] [2022-07-19 10:54:01,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:01,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:01,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:01,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 10:54:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:01,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:01,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:01,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431161097] [2022-07-19 10:54:01,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431161097] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:01,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:01,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:54:01,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325383051] [2022-07-19 10:54:01,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:01,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:54:01,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:01,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:54:01,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:54:01,687 INFO L87 Difference]: Start difference. First operand 703 states and 1012 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 10:54:01,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:01,907 INFO L93 Difference]: Finished difference Result 999 states and 1443 transitions. [2022-07-19 10:54:01,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 10:54:01,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (4), 4 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 35 [2022-07-19 10:54:01,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:01,911 INFO L225 Difference]: With dead ends: 999 [2022-07-19 10:54:01,912 INFO L226 Difference]: Without dead ends: 772 [2022-07-19 10:54:01,913 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 [2022-07-19 10:54:01,915 INFO L413 NwaCegarLoop]: 729 mSDtfsCounter, 254 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1774 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:01,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 1774 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:54:01,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-07-19 10:54:01,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 686. [2022-07-19 10:54:01,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 564 states have (on average 1.4113475177304964) internal successors, (796), 571 states have internal predecessors, (796), 87 states have call successors, (87), 28 states have call predecessors, (87), 34 states have return successors, (100), 86 states have call predecessors, (100), 81 states have call successors, (100) [2022-07-19 10:54:01,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 983 transitions. [2022-07-19 10:54:01,947 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 983 transitions. Word has length 35 [2022-07-19 10:54:01,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:01,947 INFO L495 AbstractCegarLoop]: Abstraction has 686 states and 983 transitions. [2022-07-19 10:54:01,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 10:54:01,948 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 983 transitions. [2022-07-19 10:54:01,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-19 10:54:01,950 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:01,950 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] [2022-07-19 10:54:01,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 10:54:01,950 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:01,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:01,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1008894227, now seen corresponding path program 1 times [2022-07-19 10:54:01,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:01,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421770182] [2022-07-19 10:54:01,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:01,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:01,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:01,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421770182] [2022-07-19 10:54:01,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421770182] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:01,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:01,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:54:01,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770170855] [2022-07-19 10:54:01,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:01,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:54:01,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:01,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:54:01,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:54:01,983 INFO L87 Difference]: Start difference. First operand 686 states and 983 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2022-07-19 10:54:02,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:02,234 INFO L93 Difference]: Finished difference Result 744 states and 1056 transitions. [2022-07-19 10:54:02,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:54:02,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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 32 [2022-07-19 10:54:02,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:02,239 INFO L225 Difference]: With dead ends: 744 [2022-07-19 10:54:02,239 INFO L226 Difference]: Without dead ends: 702 [2022-07-19 10:54:02,240 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 [2022-07-19 10:54:02,241 INFO L413 NwaCegarLoop]: 641 mSDtfsCounter, 691 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:02,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 1101 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:54:02,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-07-19 10:54:02,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 686. [2022-07-19 10:54:02,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 564 states have (on average 1.4078014184397163) internal successors, (794), 571 states have internal predecessors, (794), 87 states have call successors, (87), 28 states have call predecessors, (87), 34 states have return successors, (100), 86 states have call predecessors, (100), 81 states have call successors, (100) [2022-07-19 10:54:02,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 981 transitions. [2022-07-19 10:54:02,274 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 981 transitions. Word has length 32 [2022-07-19 10:54:02,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:02,276 INFO L495 AbstractCegarLoop]: Abstraction has 686 states and 981 transitions. [2022-07-19 10:54:02,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2022-07-19 10:54:02,276 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 981 transitions. [2022-07-19 10:54:02,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-19 10:54:02,279 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:02,279 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] [2022-07-19 10:54:02,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 10:54:02,280 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:02,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:02,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1838861437, now seen corresponding path program 1 times [2022-07-19 10:54:02,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:02,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860159302] [2022-07-19 10:54:02,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:02,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:02,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 10:54:02,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:02,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:02,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:02,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860159302] [2022-07-19 10:54:02,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860159302] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:02,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:02,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:54:02,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440154966] [2022-07-19 10:54:02,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:02,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:54:02,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:02,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:54:02,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:54:02,337 INFO L87 Difference]: Start difference. First operand 686 states and 981 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 10:54:02,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:02,550 INFO L93 Difference]: Finished difference Result 771 states and 1109 transitions. [2022-07-19 10:54:02,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 10:54:02,550 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-07-19 10:54:02,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:02,554 INFO L225 Difference]: With dead ends: 771 [2022-07-19 10:54:02,554 INFO L226 Difference]: Without dead ends: 711 [2022-07-19 10:54:02,555 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 [2022-07-19 10:54:02,555 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 703 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:02,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [724 Valid, 1254 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:54:02,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2022-07-19 10:54:02,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 675. [2022-07-19 10:54:02,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 557 states have (on average 1.4093357271095153) internal successors, (785), 564 states have internal predecessors, (785), 85 states have call successors, (85), 26 states have call predecessors, (85), 32 states have return successors, (98), 84 states have call predecessors, (98), 79 states have call successors, (98) [2022-07-19 10:54:02,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 968 transitions. [2022-07-19 10:54:02,587 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 968 transitions. Word has length 36 [2022-07-19 10:54:02,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:02,588 INFO L495 AbstractCegarLoop]: Abstraction has 675 states and 968 transitions. [2022-07-19 10:54:02,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 10:54:02,588 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 968 transitions. [2022-07-19 10:54:02,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-19 10:54:02,590 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:02,590 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] [2022-07-19 10:54:02,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 10:54:02,591 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:02,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:02,591 INFO L85 PathProgramCache]: Analyzing trace with hash 138801832, now seen corresponding path program 1 times [2022-07-19 10:54:02,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:02,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898769569] [2022-07-19 10:54:02,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:02,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:02,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:02,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:02,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898769569] [2022-07-19 10:54:02,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898769569] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:02,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:02,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:54:02,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179263437] [2022-07-19 10:54:02,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:02,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:54:02,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:02,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:54:02,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:54:02,632 INFO L87 Difference]: Start difference. First operand 675 states and 968 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:54:02,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:02,718 INFO L93 Difference]: Finished difference Result 832 states and 1184 transitions. [2022-07-19 10:54:02,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:54:02,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-19 10:54:02,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:02,723 INFO L225 Difference]: With dead ends: 832 [2022-07-19 10:54:02,723 INFO L226 Difference]: Without dead ends: 821 [2022-07-19 10:54:02,724 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 [2022-07-19 10:54:02,724 INFO L413 NwaCegarLoop]: 771 mSDtfsCounter, 132 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1384 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:02,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 1384 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:54:02,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-07-19 10:54:02,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 723. [2022-07-19 10:54:02,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 601 states have (on average 1.3860232945091515) internal successors, (833), 601 states have internal predecessors, (833), 85 states have call successors, (85), 26 states have call predecessors, (85), 36 states have return successors, (109), 95 states have call predecessors, (109), 79 states have call successors, (109) [2022-07-19 10:54:02,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1027 transitions. [2022-07-19 10:54:02,763 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1027 transitions. Word has length 34 [2022-07-19 10:54:02,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:02,763 INFO L495 AbstractCegarLoop]: Abstraction has 723 states and 1027 transitions. [2022-07-19 10:54:02,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:54:02,763 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1027 transitions. [2022-07-19 10:54:02,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-19 10:54:02,766 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:02,766 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] [2022-07-19 10:54:02,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 10:54:02,766 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:02,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:02,767 INFO L85 PathProgramCache]: Analyzing trace with hash -298326298, now seen corresponding path program 1 times [2022-07-19 10:54:02,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:02,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19445866] [2022-07-19 10:54:02,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:02,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:02,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:02,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:02,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19445866] [2022-07-19 10:54:02,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19445866] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:02,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:02,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:54:02,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123896356] [2022-07-19 10:54:02,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:02,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:54:02,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:02,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:54:02,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:54:02,833 INFO L87 Difference]: Start difference. First operand 723 states and 1027 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:54:03,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:03,063 INFO L93 Difference]: Finished difference Result 751 states and 1058 transitions. [2022-07-19 10:54:03,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:54:03,064 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-19 10:54:03,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:03,068 INFO L225 Difference]: With dead ends: 751 [2022-07-19 10:54:03,068 INFO L226 Difference]: Without dead ends: 704 [2022-07-19 10:54:03,069 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 [2022-07-19 10:54:03,071 INFO L413 NwaCegarLoop]: 640 mSDtfsCounter, 671 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:03,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [671 Valid, 1100 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:54:03,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-07-19 10:54:03,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 694. [2022-07-19 10:54:03,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 575 states have (on average 1.391304347826087) internal successors, (800), 581 states have internal predecessors, (800), 85 states have call successors, (85), 26 states have call predecessors, (85), 33 states have return successors, (98), 86 states have call predecessors, (98), 79 states have call successors, (98) [2022-07-19 10:54:03,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 983 transitions. [2022-07-19 10:54:03,106 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 983 transitions. Word has length 34 [2022-07-19 10:54:03,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:03,106 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 983 transitions. [2022-07-19 10:54:03,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:54:03,106 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 983 transitions. [2022-07-19 10:54:03,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-19 10:54:03,108 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:03,108 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] [2022-07-19 10:54:03,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 10:54:03,109 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:03,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:03,109 INFO L85 PathProgramCache]: Analyzing trace with hash 452395434, now seen corresponding path program 1 times [2022-07-19 10:54:03,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:03,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801471928] [2022-07-19 10:54:03,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:03,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:03,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:03,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:03,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:03,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801471928] [2022-07-19 10:54:03,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801471928] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:03,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:03,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:54:03,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809753711] [2022-07-19 10:54:03,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:03,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:54:03,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:03,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:54:03,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:54:03,174 INFO L87 Difference]: Start difference. First operand 694 states and 983 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2022-07-19 10:54:03,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:03,447 INFO L93 Difference]: Finished difference Result 792 states and 1125 transitions. [2022-07-19 10:54:03,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:54:03,448 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 35 [2022-07-19 10:54:03,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:03,451 INFO L225 Difference]: With dead ends: 792 [2022-07-19 10:54:03,451 INFO L226 Difference]: Without dead ends: 788 [2022-07-19 10:54:03,452 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 [2022-07-19 10:54:03,452 INFO L413 NwaCegarLoop]: 723 mSDtfsCounter, 752 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:03,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [762 Valid, 1179 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:54:03,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-07-19 10:54:03,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 696. [2022-07-19 10:54:03,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 577 states have (on average 1.389948006932409) internal successors, (802), 583 states have internal predecessors, (802), 85 states have call successors, (85), 26 states have call predecessors, (85), 33 states have return successors, (98), 86 states have call predecessors, (98), 79 states have call successors, (98) [2022-07-19 10:54:03,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 985 transitions. [2022-07-19 10:54:03,497 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 985 transitions. Word has length 35 [2022-07-19 10:54:03,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:03,498 INFO L495 AbstractCegarLoop]: Abstraction has 696 states and 985 transitions. [2022-07-19 10:54:03,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2022-07-19 10:54:03,498 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 985 transitions. [2022-07-19 10:54:03,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-19 10:54:03,500 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:03,500 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] [2022-07-19 10:54:03,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 10:54:03,500 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:03,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:03,501 INFO L85 PathProgramCache]: Analyzing trace with hash 452672264, now seen corresponding path program 1 times [2022-07-19 10:54:03,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:03,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15271658] [2022-07-19 10:54:03,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:03,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:03,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:03,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:03,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:03,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15271658] [2022-07-19 10:54:03,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15271658] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:03,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:03,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 10:54:03,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682299774] [2022-07-19 10:54:03,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:03,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 10:54:03,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:03,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 10:54:03,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:54:03,542 INFO L87 Difference]: Start difference. First operand 696 states and 985 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 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) [2022-07-19 10:54:03,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:03,639 INFO L93 Difference]: Finished difference Result 709 states and 998 transitions. [2022-07-19 10:54:03,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 10:54:03,639 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 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 35 [2022-07-19 10:54:03,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:03,642 INFO L225 Difference]: With dead ends: 709 [2022-07-19 10:54:03,642 INFO L226 Difference]: Without dead ends: 679 [2022-07-19 10:54:03,643 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 [2022-07-19 10:54:03,643 INFO L413 NwaCegarLoop]: 648 mSDtfsCounter, 38 mSDsluCounter, 2545 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 3193 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 [2022-07-19 10:54:03,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 3193 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:54:03,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-07-19 10:54:03,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 679. [2022-07-19 10:54:03,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 560 states have (on average 1.3964285714285714) internal successors, (782), 566 states have internal predecessors, (782), 85 states have call successors, (85), 26 states have call predecessors, (85), 33 states have return successors, (98), 86 states have call predecessors, (98), 79 states have call successors, (98) [2022-07-19 10:54:03,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 965 transitions. [2022-07-19 10:54:03,679 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 965 transitions. Word has length 35 [2022-07-19 10:54:03,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:03,680 INFO L495 AbstractCegarLoop]: Abstraction has 679 states and 965 transitions. [2022-07-19 10:54:03,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 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) [2022-07-19 10:54:03,680 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 965 transitions. [2022-07-19 10:54:03,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-19 10:54:03,682 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:03,682 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] [2022-07-19 10:54:03,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 10:54:03,682 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:03,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:03,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1733603893, now seen corresponding path program 1 times [2022-07-19 10:54:03,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:03,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942250411] [2022-07-19 10:54:03,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:03,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:03,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:03,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 10:54:03,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:03,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:03,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942250411] [2022-07-19 10:54:03,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942250411] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:03,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:03,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:54:03,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933812007] [2022-07-19 10:54:03,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:03,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:54:03,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:03,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:54:03,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:54:03,712 INFO L87 Difference]: Start difference. First operand 679 states and 965 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 10:54:03,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:03,940 INFO L93 Difference]: Finished difference Result 717 states and 1030 transitions. [2022-07-19 10:54:03,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 10:54:03,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-07-19 10:54:03,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:03,944 INFO L225 Difference]: With dead ends: 717 [2022-07-19 10:54:03,944 INFO L226 Difference]: Without dead ends: 710 [2022-07-19 10:54:03,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:54:03,945 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 150 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:03,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 1540 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:54:03,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-07-19 10:54:03,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 692. [2022-07-19 10:54:03,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 573 states have (on average 1.3909249563699826) internal successors, (797), 579 states have internal predecessors, (797), 85 states have call successors, (85), 26 states have call predecessors, (85), 33 states have return successors, (98), 86 states have call predecessors, (98), 79 states have call successors, (98) [2022-07-19 10:54:03,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 980 transitions. [2022-07-19 10:54:03,984 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 980 transitions. Word has length 37 [2022-07-19 10:54:03,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:03,984 INFO L495 AbstractCegarLoop]: Abstraction has 692 states and 980 transitions. [2022-07-19 10:54:03,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 10:54:03,985 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 980 transitions. [2022-07-19 10:54:03,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-19 10:54:03,986 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:03,986 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] [2022-07-19 10:54:03,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 10:54:03,987 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:03,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:03,987 INFO L85 PathProgramCache]: Analyzing trace with hash -190291046, now seen corresponding path program 1 times [2022-07-19 10:54:03,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:03,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531692932] [2022-07-19 10:54:03,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:03,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:04,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 10:54:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:04,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:04,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:04,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531692932] [2022-07-19 10:54:04,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531692932] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:04,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:04,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 10:54:04,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658695143] [2022-07-19 10:54:04,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:04,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 10:54:04,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:04,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 10:54:04,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:54:04,057 INFO L87 Difference]: Start difference. First operand 692 states and 980 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 10:54:04,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:04,421 INFO L93 Difference]: Finished difference Result 716 states and 1026 transitions. [2022-07-19 10:54:04,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:54:04,422 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-07-19 10:54:04,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:04,425 INFO L225 Difference]: With dead ends: 716 [2022-07-19 10:54:04,426 INFO L226 Difference]: Without dead ends: 710 [2022-07-19 10:54:04,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:54:04,426 INFO L413 NwaCegarLoop]: 616 mSDtfsCounter, 780 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 1451 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:04,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [824 Valid, 1451 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:54:04,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-07-19 10:54:04,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 692. [2022-07-19 10:54:04,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 573 states have (on average 1.3891797556719023) internal successors, (796), 579 states have internal predecessors, (796), 85 states have call successors, (85), 26 states have call predecessors, (85), 33 states have return successors, (98), 86 states have call predecessors, (98), 79 states have call successors, (98) [2022-07-19 10:54:04,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 979 transitions. [2022-07-19 10:54:04,471 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 979 transitions. Word has length 39 [2022-07-19 10:54:04,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:04,472 INFO L495 AbstractCegarLoop]: Abstraction has 692 states and 979 transitions. [2022-07-19 10:54:04,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 10:54:04,472 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 979 transitions. [2022-07-19 10:54:04,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-19 10:54:04,474 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:04,474 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:04,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 10:54:04,474 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:04,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:04,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1290991354, now seen corresponding path program 1 times [2022-07-19 10:54:04,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:04,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327047758] [2022-07-19 10:54:04,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:04,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:04,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:04,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 10:54:04,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:04,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:04,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:04,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327047758] [2022-07-19 10:54:04,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327047758] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:04,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:04,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 10:54:04,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817824754] [2022-07-19 10:54:04,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:04,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 10:54:04,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:04,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 10:54:04,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:54:04,529 INFO L87 Difference]: Start difference. First operand 692 states and 979 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 10:54:04,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:04,893 INFO L93 Difference]: Finished difference Result 731 states and 1044 transitions. [2022-07-19 10:54:04,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 10:54:04,893 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-07-19 10:54:04,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:04,896 INFO L225 Difference]: With dead ends: 731 [2022-07-19 10:54:04,896 INFO L226 Difference]: Without dead ends: 699 [2022-07-19 10:54:04,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-07-19 10:54:04,897 INFO L413 NwaCegarLoop]: 618 mSDtfsCounter, 158 mSDsluCounter, 3340 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 3958 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:04,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 3958 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:54:04,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-07-19 10:54:04,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 683. [2022-07-19 10:54:04,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 566 states have (on average 1.3710247349823321) internal successors, (776), 572 states have internal predecessors, (776), 83 states have call successors, (83), 26 states have call predecessors, (83), 33 states have return successors, (96), 84 states have call predecessors, (96), 77 states have call successors, (96) [2022-07-19 10:54:04,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 955 transitions. [2022-07-19 10:54:04,941 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 955 transitions. Word has length 40 [2022-07-19 10:54:04,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:04,942 INFO L495 AbstractCegarLoop]: Abstraction has 683 states and 955 transitions. [2022-07-19 10:54:04,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 10:54:04,942 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 955 transitions. [2022-07-19 10:54:04,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-19 10:54:04,944 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:04,944 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] [2022-07-19 10:54:04,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-19 10:54:04,944 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:04,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:04,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1689117095, now seen corresponding path program 1 times [2022-07-19 10:54:04,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:04,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475890410] [2022-07-19 10:54:04,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:04,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:04,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 10:54:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:04,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:04,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:04,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475890410] [2022-07-19 10:54:04,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475890410] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:04,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:04,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:54:04,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817242901] [2022-07-19 10:54:04,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:04,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:54:04,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:04,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:54:04,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:54:04,986 INFO L87 Difference]: Start difference. First operand 683 states and 955 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 10:54:05,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:05,431 INFO L93 Difference]: Finished difference Result 764 states and 1068 transitions. [2022-07-19 10:54:05,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 10:54:05,432 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-07-19 10:54:05,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:05,438 INFO L225 Difference]: With dead ends: 764 [2022-07-19 10:54:05,438 INFO L226 Difference]: Without dead ends: 728 [2022-07-19 10:54:05,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:54:05,439 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 789 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 1511 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:05,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [809 Valid, 1511 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 10:54:05,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-07-19 10:54:05,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 683. [2022-07-19 10:54:05,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 566 states have (on average 1.3692579505300353) internal successors, (775), 572 states have internal predecessors, (775), 83 states have call successors, (83), 26 states have call predecessors, (83), 33 states have return successors, (96), 84 states have call predecessors, (96), 77 states have call successors, (96) [2022-07-19 10:54:05,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 954 transitions. [2022-07-19 10:54:05,487 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 954 transitions. Word has length 41 [2022-07-19 10:54:05,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:05,487 INFO L495 AbstractCegarLoop]: Abstraction has 683 states and 954 transitions. [2022-07-19 10:54:05,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 10:54:05,487 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 954 transitions. [2022-07-19 10:54:05,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 10:54:05,489 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:05,489 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:05,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 10:54:05,490 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:05,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:05,490 INFO L85 PathProgramCache]: Analyzing trace with hash -90091863, now seen corresponding path program 1 times [2022-07-19 10:54:05,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:05,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709625430] [2022-07-19 10:54:05,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:05,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:05,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:05,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:54:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:05,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 10:54:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:05,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:05,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:05,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709625430] [2022-07-19 10:54:05,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709625430] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:05,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:05,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:54:05,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57970995] [2022-07-19 10:54:05,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:05,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:54:05,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:05,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:54:05,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:54:05,527 INFO L87 Difference]: Start difference. First operand 683 states and 954 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 10:54:05,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:05,927 INFO L93 Difference]: Finished difference Result 890 states and 1253 transitions. [2022-07-19 10:54:05,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:54:05,928 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2022-07-19 10:54:05,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:05,931 INFO L225 Difference]: With dead ends: 890 [2022-07-19 10:54:05,931 INFO L226 Difference]: Without dead ends: 678 [2022-07-19 10:54:05,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:54:05,933 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 252 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 1790 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:05,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 1790 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:54:05,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-07-19 10:54:05,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 662. [2022-07-19 10:54:05,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 548 states have (on average 1.364963503649635) internal successors, (748), 553 states have internal predecessors, (748), 82 states have call successors, (82), 26 states have call predecessors, (82), 31 states have return successors, (94), 82 states have call predecessors, (94), 77 states have call successors, (94) [2022-07-19 10:54:05,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 924 transitions. [2022-07-19 10:54:05,988 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 924 transitions. Word has length 43 [2022-07-19 10:54:05,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:05,988 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 924 transitions. [2022-07-19 10:54:05,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 10:54:05,988 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 924 transitions. [2022-07-19 10:54:05,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 10:54:05,991 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:05,991 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:05,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-19 10:54:05,991 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:05,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:05,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1421107692, now seen corresponding path program 1 times [2022-07-19 10:54:05,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:05,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955121855] [2022-07-19 10:54:05,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:05,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:06,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:06,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 10:54:06,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:06,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 10:54:06,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:06,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:06,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955121855] [2022-07-19 10:54:06,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955121855] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:06,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:06,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-19 10:54:06,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239932431] [2022-07-19 10:54:06,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:06,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 10:54:06,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:06,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 10:54:06,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-19 10:54:06,117 INFO L87 Difference]: Start difference. First operand 662 states and 924 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 7 states have internal predecessors, (38), 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) [2022-07-19 10:54:06,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:06,838 INFO L93 Difference]: Finished difference Result 692 states and 978 transitions. [2022-07-19 10:54:06,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 10:54:06,839 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 7 states have internal predecessors, (38), 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 43 [2022-07-19 10:54:06,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:06,842 INFO L225 Difference]: With dead ends: 692 [2022-07-19 10:54:06,842 INFO L226 Difference]: Without dead ends: 676 [2022-07-19 10:54:06,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-07-19 10:54:06,843 INFO L413 NwaCegarLoop]: 608 mSDtfsCounter, 98 mSDsluCounter, 3829 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 4437 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:06,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 4437 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 10:54:06,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-07-19 10:54:06,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 660. [2022-07-19 10:54:06,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 547 states have (on average 1.363802559414991) internal successors, (746), 552 states have internal predecessors, (746), 81 states have call successors, (81), 26 states have call predecessors, (81), 31 states have return successors, (93), 81 states have call predecessors, (93), 76 states have call successors, (93) [2022-07-19 10:54:06,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 920 transitions. [2022-07-19 10:54:06,885 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 920 transitions. Word has length 43 [2022-07-19 10:54:06,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:06,886 INFO L495 AbstractCegarLoop]: Abstraction has 660 states and 920 transitions. [2022-07-19 10:54:06,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 7 states have internal predecessors, (38), 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) [2022-07-19 10:54:06,886 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 920 transitions. [2022-07-19 10:54:06,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-19 10:54:06,888 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:06,888 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] [2022-07-19 10:54:06,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-19 10:54:06,888 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:06,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:06,889 INFO L85 PathProgramCache]: Analyzing trace with hash 531963361, now seen corresponding path program 1 times [2022-07-19 10:54:06,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:06,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462701487] [2022-07-19 10:54:06,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:06,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:06,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:54:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:07,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 10:54:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:07,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:07,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:07,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462701487] [2022-07-19 10:54:07,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462701487] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:07,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:07,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-19 10:54:07,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656601360] [2022-07-19 10:54:07,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:07,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 10:54:07,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:07,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 10:54:07,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-07-19 10:54:07,035 INFO L87 Difference]: Start difference. First operand 660 states and 920 transitions. Second operand has 13 states, 12 states have (on average 3.25) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:07,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:07,971 INFO L93 Difference]: Finished difference Result 712 states and 998 transitions. [2022-07-19 10:54:07,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 10:54:07,971 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.25) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-07-19 10:54:07,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:07,975 INFO L225 Difference]: With dead ends: 712 [2022-07-19 10:54:07,975 INFO L226 Difference]: Without dead ends: 691 [2022-07-19 10:54:07,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-07-19 10:54:07,976 INFO L413 NwaCegarLoop]: 581 mSDtfsCounter, 171 mSDsluCounter, 4453 mSDsCounter, 0 mSdLazyCounter, 1516 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 5034 SdHoareTripleChecker+Invalid, 1602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:07,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 5034 Invalid, 1602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1516 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 10:54:07,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-07-19 10:54:08,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 659. [2022-07-19 10:54:08,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 546 states have (on average 1.3461538461538463) internal successors, (735), 551 states have internal predecessors, (735), 81 states have call successors, (81), 26 states have call predecessors, (81), 31 states have return successors, (93), 81 states have call predecessors, (93), 76 states have call successors, (93) [2022-07-19 10:54:08,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 909 transitions. [2022-07-19 10:54:08,021 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 909 transitions. Word has length 44 [2022-07-19 10:54:08,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:08,021 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 909 transitions. [2022-07-19 10:54:08,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.25) internal successors, (39), 10 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:08,022 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 909 transitions. [2022-07-19 10:54:08,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-19 10:54:08,023 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:08,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:08,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-19 10:54:08,024 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:08,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:08,024 INFO L85 PathProgramCache]: Analyzing trace with hash -927803137, now seen corresponding path program 1 times [2022-07-19 10:54:08,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:08,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028787937] [2022-07-19 10:54:08,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:08,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:08,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:08,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 10:54:08,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:08,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 10:54:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:08,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:08,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028787937] [2022-07-19 10:54:08,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028787937] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:08,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:08,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-19 10:54:08,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944405711] [2022-07-19 10:54:08,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:08,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 10:54:08,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:08,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 10:54:08,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-19 10:54:08,164 INFO L87 Difference]: Start difference. First operand 659 states and 909 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 7 states have internal predecessors, (39), 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) [2022-07-19 10:54:08,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:08,904 INFO L93 Difference]: Finished difference Result 688 states and 962 transitions. [2022-07-19 10:54:08,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 10:54:08,905 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 7 states have internal predecessors, (39), 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 44 [2022-07-19 10:54:08,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:08,908 INFO L225 Difference]: With dead ends: 688 [2022-07-19 10:54:08,908 INFO L226 Difference]: Without dead ends: 672 [2022-07-19 10:54:08,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-07-19 10:54:08,909 INFO L413 NwaCegarLoop]: 590 mSDtfsCounter, 98 mSDsluCounter, 3703 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 4293 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:08,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 4293 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 10:54:08,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-07-19 10:54:08,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 656. [2022-07-19 10:54:08,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 544 states have (on average 1.3455882352941178) internal successors, (732), 549 states have internal predecessors, (732), 80 states have call successors, (80), 26 states have call predecessors, (80), 31 states have return successors, (92), 80 states have call predecessors, (92), 75 states have call successors, (92) [2022-07-19 10:54:08,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 904 transitions. [2022-07-19 10:54:08,953 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 904 transitions. Word has length 44 [2022-07-19 10:54:08,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:08,953 INFO L495 AbstractCegarLoop]: Abstraction has 656 states and 904 transitions. [2022-07-19 10:54:08,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 7 states have internal predecessors, (39), 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) [2022-07-19 10:54:08,954 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 904 transitions. [2022-07-19 10:54:08,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-19 10:54:08,957 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:08,957 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] [2022-07-19 10:54:08,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-19 10:54:08,958 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:08,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:08,958 INFO L85 PathProgramCache]: Analyzing trace with hash 116231593, now seen corresponding path program 1 times [2022-07-19 10:54:08,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:08,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570358146] [2022-07-19 10:54:08,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:08,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:08,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:09,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-19 10:54:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:09,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:09,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:09,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570358146] [2022-07-19 10:54:09,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570358146] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:09,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:09,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 10:54:09,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330365738] [2022-07-19 10:54:09,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:09,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 10:54:09,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:09,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 10:54:09,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:54:09,034 INFO L87 Difference]: Start difference. First operand 656 states and 904 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 10:54:09,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:09,493 INFO L93 Difference]: Finished difference Result 727 states and 1001 transitions. [2022-07-19 10:54:09,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 10:54:09,493 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-07-19 10:54:09,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:09,496 INFO L225 Difference]: With dead ends: 727 [2022-07-19 10:54:09,497 INFO L226 Difference]: Without dead ends: 660 [2022-07-19 10:54:09,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-07-19 10:54:09,498 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 218 mSDsluCounter, 3592 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 4163 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:09,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 4163 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:54:09,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-07-19 10:54:09,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 644. [2022-07-19 10:54:09,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 535 states have (on average 1.3401869158878505) internal successors, (717), 540 states have internal predecessors, (717), 77 states have call successors, (77), 26 states have call predecessors, (77), 31 states have return successors, (89), 77 states have call predecessors, (89), 72 states have call successors, (89) [2022-07-19 10:54:09,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 883 transitions. [2022-07-19 10:54:09,542 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 883 transitions. Word has length 44 [2022-07-19 10:54:09,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:09,543 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 883 transitions. [2022-07-19 10:54:09,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 10:54:09,543 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 883 transitions. [2022-07-19 10:54:09,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 10:54:09,545 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:09,545 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:09,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-19 10:54:09,545 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:09,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:09,546 INFO L85 PathProgramCache]: Analyzing trace with hash 39637354, now seen corresponding path program 1 times [2022-07-19 10:54:09,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:09,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839296394] [2022-07-19 10:54:09,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:09,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:09,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:09,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:54:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:09,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:54:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:09,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:09,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839296394] [2022-07-19 10:54:09,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839296394] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:09,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:09,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 10:54:09,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348213403] [2022-07-19 10:54:09,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:09,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 10:54:09,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:09,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 10:54:09,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:54:09,599 INFO L87 Difference]: Start difference. First operand 644 states and 883 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:09,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:09,997 INFO L93 Difference]: Finished difference Result 789 states and 1125 transitions. [2022-07-19 10:54:09,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 10:54:09,997 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (3), 3 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 45 [2022-07-19 10:54:09,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:10,001 INFO L225 Difference]: With dead ends: 789 [2022-07-19 10:54:10,001 INFO L226 Difference]: Without dead ends: 695 [2022-07-19 10:54:10,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:54:10,002 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 134 mSDsluCounter, 1667 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 2206 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:10,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 2206 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:54:10,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-07-19 10:54:10,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 651. [2022-07-19 10:54:10,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 540 states have (on average 1.3407407407407408) internal successors, (724), 546 states have internal predecessors, (724), 78 states have call successors, (78), 26 states have call predecessors, (78), 32 states have return successors, (96), 78 states have call predecessors, (96), 73 states have call successors, (96) [2022-07-19 10:54:10,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 898 transitions. [2022-07-19 10:54:10,047 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 898 transitions. Word has length 45 [2022-07-19 10:54:10,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:10,048 INFO L495 AbstractCegarLoop]: Abstraction has 651 states and 898 transitions. [2022-07-19 10:54:10,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:10,049 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 898 transitions. [2022-07-19 10:54:10,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 10:54:10,050 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:10,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:10,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-19 10:54:10,051 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:10,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:10,052 INFO L85 PathProgramCache]: Analyzing trace with hash -469835736, now seen corresponding path program 1 times [2022-07-19 10:54:10,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:10,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905319855] [2022-07-19 10:54:10,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:10,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:10,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:10,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:54:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:10,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:54:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:10,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:10,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:10,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905319855] [2022-07-19 10:54:10,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905319855] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:10,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:10,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 10:54:10,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396825737] [2022-07-19 10:54:10,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:10,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 10:54:10,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:10,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 10:54:10,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:54:10,132 INFO L87 Difference]: Start difference. First operand 651 states and 898 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:10,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:10,527 INFO L93 Difference]: Finished difference Result 689 states and 966 transitions. [2022-07-19 10:54:10,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:54:10,527 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-07-19 10:54:10,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:10,531 INFO L225 Difference]: With dead ends: 689 [2022-07-19 10:54:10,531 INFO L226 Difference]: Without dead ends: 669 [2022-07-19 10:54:10,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-07-19 10:54:10,532 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 245 mSDsluCounter, 2892 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 3461 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:10,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 3461 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:54:10,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-07-19 10:54:10,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 649. [2022-07-19 10:54:10,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 539 states have (on average 1.339517625231911) internal successors, (722), 545 states have internal predecessors, (722), 77 states have call successors, (77), 26 states have call predecessors, (77), 32 states have return successors, (95), 77 states have call predecessors, (95), 72 states have call successors, (95) [2022-07-19 10:54:10,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 894 transitions. [2022-07-19 10:54:10,571 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 894 transitions. Word has length 45 [2022-07-19 10:54:10,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:10,572 INFO L495 AbstractCegarLoop]: Abstraction has 649 states and 894 transitions. [2022-07-19 10:54:10,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:10,572 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 894 transitions. [2022-07-19 10:54:10,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 10:54:10,578 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:10,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:10,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-19 10:54:10,579 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:10,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:10,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1759820693, now seen corresponding path program 1 times [2022-07-19 10:54:10,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:10,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679532521] [2022-07-19 10:54:10,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:10,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:10,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:54:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:10,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:10,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:10,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679532521] [2022-07-19 10:54:10,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679532521] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:10,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:10,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 10:54:10,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299094451] [2022-07-19 10:54:10,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:10,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 10:54:10,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:10,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 10:54:10,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:54:10,648 INFO L87 Difference]: Start difference. First operand 649 states and 894 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 10:54:10,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:10,987 INFO L93 Difference]: Finished difference Result 696 states and 976 transitions. [2022-07-19 10:54:10,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 10:54:10,987 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-07-19 10:54:10,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:10,990 INFO L225 Difference]: With dead ends: 696 [2022-07-19 10:54:10,990 INFO L226 Difference]: Without dead ends: 661 [2022-07-19 10:54:10,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-07-19 10:54:10,991 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 166 mSDsluCounter, 2999 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 3568 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:10,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 3568 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:54:10,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-07-19 10:54:11,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 641. [2022-07-19 10:54:11,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 533 states have (on average 1.3320825515947468) internal successors, (710), 539 states have internal predecessors, (710), 75 states have call successors, (75), 26 states have call predecessors, (75), 32 states have return successors, (93), 75 states have call predecessors, (93), 70 states have call successors, (93) [2022-07-19 10:54:11,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 878 transitions. [2022-07-19 10:54:11,028 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 878 transitions. Word has length 45 [2022-07-19 10:54:11,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:11,028 INFO L495 AbstractCegarLoop]: Abstraction has 641 states and 878 transitions. [2022-07-19 10:54:11,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 10:54:11,028 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 878 transitions. [2022-07-19 10:54:11,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-19 10:54:11,030 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:11,030 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:11,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-19 10:54:11,031 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:11,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:11,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1002239718, now seen corresponding path program 1 times [2022-07-19 10:54:11,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:11,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599933200] [2022-07-19 10:54:11,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:11,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:11,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:11,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:54:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:11,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 10:54:11,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:11,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:11,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599933200] [2022-07-19 10:54:11,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599933200] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:11,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:11,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-19 10:54:11,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285255179] [2022-07-19 10:54:11,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:11,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 10:54:11,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:11,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 10:54:11,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-19 10:54:11,174 INFO L87 Difference]: Start difference. First operand 641 states and 878 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 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) [2022-07-19 10:54:11,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:11,846 INFO L93 Difference]: Finished difference Result 676 states and 943 transitions. [2022-07-19 10:54:11,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 10:54:11,846 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 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 46 [2022-07-19 10:54:11,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:11,849 INFO L225 Difference]: With dead ends: 676 [2022-07-19 10:54:11,849 INFO L226 Difference]: Without dead ends: 658 [2022-07-19 10:54:11,850 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 [2022-07-19 10:54:11,850 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 110 mSDsluCounter, 3784 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 4329 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:11,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 4329 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 10:54:11,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-07-19 10:54:11,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 638. [2022-07-19 10:54:11,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 531 states have (on average 1.3314500941619585) internal successors, (707), 537 states have internal predecessors, (707), 74 states have call successors, (74), 26 states have call predecessors, (74), 32 states have return successors, (92), 74 states have call predecessors, (92), 69 states have call successors, (92) [2022-07-19 10:54:11,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 873 transitions. [2022-07-19 10:54:11,900 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 873 transitions. Word has length 46 [2022-07-19 10:54:11,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:11,901 INFO L495 AbstractCegarLoop]: Abstraction has 638 states and 873 transitions. [2022-07-19 10:54:11,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 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) [2022-07-19 10:54:11,901 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 873 transitions. [2022-07-19 10:54:11,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-19 10:54:11,903 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:11,903 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:11,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-19 10:54:11,903 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:11,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:11,904 INFO L85 PathProgramCache]: Analyzing trace with hash -113531146, now seen corresponding path program 1 times [2022-07-19 10:54:11,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:11,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018727063] [2022-07-19 10:54:11,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:11,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:11,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:11,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:54:11,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:11,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 10:54:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:11,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:11,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018727063] [2022-07-19 10:54:11,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018727063] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:11,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:11,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 10:54:11,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486017867] [2022-07-19 10:54:11,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:11,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 10:54:11,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:11,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 10:54:11,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:54:11,955 INFO L87 Difference]: Start difference. First operand 638 states and 873 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:12,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:12,224 INFO L93 Difference]: Finished difference Result 695 states and 980 transitions. [2022-07-19 10:54:12,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:54:12,224 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2022-07-19 10:54:12,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:12,228 INFO L225 Difference]: With dead ends: 695 [2022-07-19 10:54:12,228 INFO L226 Difference]: Without dead ends: 668 [2022-07-19 10:54:12,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:54:12,229 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 187 mSDsluCounter, 1781 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 2314 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:12,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 2314 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:54:12,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-07-19 10:54:12,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 642. [2022-07-19 10:54:12,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 533 states have (on average 1.3302063789868668) internal successors, (709), 541 states have internal predecessors, (709), 74 states have call successors, (74), 26 states have call predecessors, (74), 34 states have return successors, (108), 74 states have call predecessors, (108), 69 states have call successors, (108) [2022-07-19 10:54:12,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 891 transitions. [2022-07-19 10:54:12,266 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 891 transitions. Word has length 46 [2022-07-19 10:54:12,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:12,266 INFO L495 AbstractCegarLoop]: Abstraction has 642 states and 891 transitions. [2022-07-19 10:54:12,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:12,266 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 891 transitions. [2022-07-19 10:54:12,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-19 10:54:12,268 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:12,268 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:12,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-19 10:54:12,269 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:12,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:12,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1400503670, now seen corresponding path program 1 times [2022-07-19 10:54:12,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:12,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514284900] [2022-07-19 10:54:12,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:12,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:12,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:12,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 10:54:12,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:12,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 10:54:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:12,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:12,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:12,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514284900] [2022-07-19 10:54:12,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514284900] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:12,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:12,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-19 10:54:12,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121332168] [2022-07-19 10:54:12,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:12,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 10:54:12,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:12,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 10:54:12,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-07-19 10:54:12,381 INFO L87 Difference]: Start difference. First operand 642 states and 891 transitions. Second operand has 13 states, 12 states have (on average 3.5) internal successors, (42), 10 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:13,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:13,276 INFO L93 Difference]: Finished difference Result 696 states and 976 transitions. [2022-07-19 10:54:13,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 10:54:13,276 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 10 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2022-07-19 10:54:13,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:13,279 INFO L225 Difference]: With dead ends: 696 [2022-07-19 10:54:13,280 INFO L226 Difference]: Without dead ends: 676 [2022-07-19 10:54:13,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-07-19 10:54:13,282 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 170 mSDsluCounter, 4257 mSDsCounter, 0 mSdLazyCounter, 1656 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 4777 SdHoareTripleChecker+Invalid, 1728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:13,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 4777 Invalid, 1728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1656 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 10:54:13,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-07-19 10:54:13,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 640. [2022-07-19 10:54:13,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 532 states have (on average 1.3289473684210527) internal successors, (707), 540 states have internal predecessors, (707), 73 states have call successors, (73), 26 states have call predecessors, (73), 34 states have return successors, (107), 73 states have call predecessors, (107), 68 states have call successors, (107) [2022-07-19 10:54:13,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 887 transitions. [2022-07-19 10:54:13,321 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 887 transitions. Word has length 47 [2022-07-19 10:54:13,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:13,321 INFO L495 AbstractCegarLoop]: Abstraction has 640 states and 887 transitions. [2022-07-19 10:54:13,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 10 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:13,322 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 887 transitions. [2022-07-19 10:54:13,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-19 10:54:13,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:13,324 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:13,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-19 10:54:13,324 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:13,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:13,325 INFO L85 PathProgramCache]: Analyzing trace with hash -926060850, now seen corresponding path program 1 times [2022-07-19 10:54:13,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:13,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737136637] [2022-07-19 10:54:13,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:13,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:13,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:13,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-19 10:54:13,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:13,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 10:54:13,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:13,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:13,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737136637] [2022-07-19 10:54:13,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737136637] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:13,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:13,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-19 10:54:13,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769738598] [2022-07-19 10:54:13,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:13,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 10:54:13,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:13,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 10:54:13,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-07-19 10:54:13,474 INFO L87 Difference]: Start difference. First operand 640 states and 887 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 9 states have internal predecessors, (49), 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) [2022-07-19 10:54:14,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:14,242 INFO L93 Difference]: Finished difference Result 675 states and 952 transitions. [2022-07-19 10:54:14,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 10:54:14,242 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 9 states have internal predecessors, (49), 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 54 [2022-07-19 10:54:14,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:14,245 INFO L225 Difference]: With dead ends: 675 [2022-07-19 10:54:14,245 INFO L226 Difference]: Without dead ends: 651 [2022-07-19 10:54:14,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-07-19 10:54:14,246 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 123 mSDsluCounter, 4143 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 4682 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:14,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 4682 Invalid, 1421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1354 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 10:54:14,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-07-19 10:54:14,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 631. [2022-07-19 10:54:14,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 525 states have (on average 1.3295238095238096) internal successors, (698), 533 states have internal predecessors, (698), 71 states have call successors, (71), 26 states have call predecessors, (71), 34 states have return successors, (105), 71 states have call predecessors, (105), 66 states have call successors, (105) [2022-07-19 10:54:14,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 874 transitions. [2022-07-19 10:54:14,309 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 874 transitions. Word has length 54 [2022-07-19 10:54:14,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:14,310 INFO L495 AbstractCegarLoop]: Abstraction has 631 states and 874 transitions. [2022-07-19 10:54:14,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 9 states have internal predecessors, (49), 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) [2022-07-19 10:54:14,310 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 874 transitions. [2022-07-19 10:54:14,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-19 10:54:14,312 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:14,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:14,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-19 10:54:14,313 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:14,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:14,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1310476923, now seen corresponding path program 1 times [2022-07-19 10:54:14,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:14,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395404799] [2022-07-19 10:54:14,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:14,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:14,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 10:54:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:14,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 10:54:14,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:14,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:14,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395404799] [2022-07-19 10:54:14,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395404799] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:14,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:14,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-19 10:54:14,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215588878] [2022-07-19 10:54:14,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:14,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 10:54:14,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:14,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 10:54:14,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-07-19 10:54:14,471 INFO L87 Difference]: Start difference. First operand 631 states and 874 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 9 states have internal predecessors, (43), 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) [2022-07-19 10:54:15,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:15,229 INFO L93 Difference]: Finished difference Result 666 states and 938 transitions. [2022-07-19 10:54:15,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 10:54:15,230 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 9 states have internal predecessors, (43), 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 48 [2022-07-19 10:54:15,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:15,233 INFO L225 Difference]: With dead ends: 666 [2022-07-19 10:54:15,233 INFO L226 Difference]: Without dead ends: 648 [2022-07-19 10:54:15,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-07-19 10:54:15,235 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 123 mSDsluCounter, 4050 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 4577 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:15,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 4577 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1329 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 10:54:15,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-07-19 10:54:15,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 628. [2022-07-19 10:54:15,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 523 states have (on average 1.3288718929254302) internal successors, (695), 531 states have internal predecessors, (695), 70 states have call successors, (70), 26 states have call predecessors, (70), 34 states have return successors, (104), 70 states have call predecessors, (104), 65 states have call successors, (104) [2022-07-19 10:54:15,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 869 transitions. [2022-07-19 10:54:15,278 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 869 transitions. Word has length 48 [2022-07-19 10:54:15,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:15,278 INFO L495 AbstractCegarLoop]: Abstraction has 628 states and 869 transitions. [2022-07-19 10:54:15,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 9 states have internal predecessors, (43), 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) [2022-07-19 10:54:15,278 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 869 transitions. [2022-07-19 10:54:15,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-19 10:54:15,280 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:15,280 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:15,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-19 10:54:15,281 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:15,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:15,281 INFO L85 PathProgramCache]: Analyzing trace with hash -631995317, now seen corresponding path program 1 times [2022-07-19 10:54:15,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:15,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888997097] [2022-07-19 10:54:15,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:15,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:15,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:54:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:15,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 10:54:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:15,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:15,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:15,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888997097] [2022-07-19 10:54:15,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888997097] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:15,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:15,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-19 10:54:15,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024410062] [2022-07-19 10:54:15,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:15,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 10:54:15,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:15,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 10:54:15,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-07-19 10:54:15,441 INFO L87 Difference]: Start difference. First operand 628 states and 869 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 9 states have internal predecessors, (42), 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) [2022-07-19 10:54:16,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:16,210 INFO L93 Difference]: Finished difference Result 663 states and 933 transitions. [2022-07-19 10:54:16,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 10:54:16,210 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 9 states have internal predecessors, (42), 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 47 [2022-07-19 10:54:16,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:16,213 INFO L225 Difference]: With dead ends: 663 [2022-07-19 10:54:16,213 INFO L226 Difference]: Without dead ends: 645 [2022-07-19 10:54:16,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-07-19 10:54:16,214 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 123 mSDsluCounter, 3998 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 4517 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:16,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 4517 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1316 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 10:54:16,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-07-19 10:54:16,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 625. [2022-07-19 10:54:16,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 521 states have (on average 1.328214971209213) internal successors, (692), 529 states have internal predecessors, (692), 69 states have call successors, (69), 26 states have call predecessors, (69), 34 states have return successors, (103), 69 states have call predecessors, (103), 64 states have call successors, (103) [2022-07-19 10:54:16,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 864 transitions. [2022-07-19 10:54:16,250 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 864 transitions. Word has length 47 [2022-07-19 10:54:16,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:16,251 INFO L495 AbstractCegarLoop]: Abstraction has 625 states and 864 transitions. [2022-07-19 10:54:16,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 9 states have internal predecessors, (42), 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) [2022-07-19 10:54:16,251 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 864 transitions. [2022-07-19 10:54:16,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-19 10:54:16,253 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:16,253 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:16,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-19 10:54:16,253 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:16,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:16,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1897196007, now seen corresponding path program 1 times [2022-07-19 10:54:16,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:16,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377163449] [2022-07-19 10:54:16,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:16,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:16,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 10:54:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:16,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 10:54:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:16,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 10:54:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:16,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:16,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377163449] [2022-07-19 10:54:16,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377163449] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:16,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:16,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:54:16,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424892427] [2022-07-19 10:54:16,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:16,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:54:16,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:16,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:54:16,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:54:16,301 INFO L87 Difference]: Start difference. First operand 625 states and 864 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 10:54:16,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:16,624 INFO L93 Difference]: Finished difference Result 886 states and 1230 transitions. [2022-07-19 10:54:16,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:54:16,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-07-19 10:54:16,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:16,627 INFO L225 Difference]: With dead ends: 886 [2022-07-19 10:54:16,628 INFO L226 Difference]: Without dead ends: 736 [2022-07-19 10:54:16,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:54:16,629 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 315 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 1311 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:16,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 1311 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:54:16,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-07-19 10:54:16,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 689. [2022-07-19 10:54:16,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 575 states have (on average 1.3269565217391304) internal successors, (763), 583 states have internal predecessors, (763), 72 states have call successors, (72), 30 states have call predecessors, (72), 41 states have return successors, (112), 75 states have call predecessors, (112), 68 states have call successors, (112) [2022-07-19 10:54:16,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 947 transitions. [2022-07-19 10:54:16,669 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 947 transitions. Word has length 50 [2022-07-19 10:54:16,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:16,669 INFO L495 AbstractCegarLoop]: Abstraction has 689 states and 947 transitions. [2022-07-19 10:54:16,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 10:54:16,669 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 947 transitions. [2022-07-19 10:54:16,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-19 10:54:16,671 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:16,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:16,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-19 10:54:16,672 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:16,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:16,672 INFO L85 PathProgramCache]: Analyzing trace with hash -532277969, now seen corresponding path program 1 times [2022-07-19 10:54:16,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:16,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78844504] [2022-07-19 10:54:16,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:16,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:16,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:16,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:54:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:16,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:54:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:16,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 10:54:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:16,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:16,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:16,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78844504] [2022-07-19 10:54:16,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78844504] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:16,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:16,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 10:54:16,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973034455] [2022-07-19 10:54:16,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:16,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 10:54:16,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:16,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 10:54:16,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-07-19 10:54:16,805 INFO L87 Difference]: Start difference. First operand 689 states and 947 transitions. Second operand has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 10:54:17,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:17,781 INFO L93 Difference]: Finished difference Result 753 states and 1042 transitions. [2022-07-19 10:54:17,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 10:54:17,782 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 52 [2022-07-19 10:54:17,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:17,785 INFO L225 Difference]: With dead ends: 753 [2022-07-19 10:54:17,785 INFO L226 Difference]: Without dead ends: 733 [2022-07-19 10:54:17,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-07-19 10:54:17,786 INFO L413 NwaCegarLoop]: 506 mSDtfsCounter, 245 mSDsluCounter, 4354 mSDsCounter, 0 mSdLazyCounter, 1734 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 4860 SdHoareTripleChecker+Invalid, 1863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:17,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 4860 Invalid, 1863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1734 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 10:54:17,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-07-19 10:54:17,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 687. [2022-07-19 10:54:17,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 574 states have (on average 1.3257839721254356) internal successors, (761), 582 states have internal predecessors, (761), 71 states have call successors, (71), 30 states have call predecessors, (71), 41 states have return successors, (111), 74 states have call predecessors, (111), 67 states have call successors, (111) [2022-07-19 10:54:17,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 943 transitions. [2022-07-19 10:54:17,826 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 943 transitions. Word has length 52 [2022-07-19 10:54:17,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:17,826 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 943 transitions. [2022-07-19 10:54:17,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 10:54:17,827 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 943 transitions. [2022-07-19 10:54:17,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-19 10:54:17,828 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:17,829 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:17,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-19 10:54:17,829 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:17,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:17,829 INFO L85 PathProgramCache]: Analyzing trace with hash 232958448, now seen corresponding path program 1 times [2022-07-19 10:54:17,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:17,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564273480] [2022-07-19 10:54:17,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:17,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:17,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 10:54:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:17,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-19 10:54:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:17,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 10:54:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:17,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:17,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:17,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564273480] [2022-07-19 10:54:17,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564273480] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:17,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:17,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 10:54:17,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304917520] [2022-07-19 10:54:17,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:17,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 10:54:17,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:17,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 10:54:17,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-07-19 10:54:17,950 INFO L87 Difference]: Start difference. First operand 687 states and 943 transitions. Second operand has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 10 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 10:54:18,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:18,819 INFO L93 Difference]: Finished difference Result 751 states and 1038 transitions. [2022-07-19 10:54:18,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 10:54:18,820 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 10 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 51 [2022-07-19 10:54:18,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:18,822 INFO L225 Difference]: With dead ends: 751 [2022-07-19 10:54:18,822 INFO L226 Difference]: Without dead ends: 731 [2022-07-19 10:54:18,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-07-19 10:54:18,824 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 264 mSDsluCounter, 3658 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 4161 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:18,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 4161 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1443 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 10:54:18,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-07-19 10:54:18,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 685. [2022-07-19 10:54:18,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 573 states have (on average 1.324607329842932) internal successors, (759), 581 states have internal predecessors, (759), 70 states have call successors, (70), 30 states have call predecessors, (70), 41 states have return successors, (110), 73 states have call predecessors, (110), 66 states have call successors, (110) [2022-07-19 10:54:18,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 939 transitions. [2022-07-19 10:54:18,863 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 939 transitions. Word has length 51 [2022-07-19 10:54:18,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:18,863 INFO L495 AbstractCegarLoop]: Abstraction has 685 states and 939 transitions. [2022-07-19 10:54:18,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 10 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 10:54:18,863 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 939 transitions. [2022-07-19 10:54:18,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-19 10:54:18,865 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:18,865 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:18,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-19 10:54:18,866 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:18,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:18,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1506455403, now seen corresponding path program 1 times [2022-07-19 10:54:18,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:18,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602808462] [2022-07-19 10:54:18,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:18,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:18,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 10:54:18,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:18,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 10:54:18,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:18,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:18,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:18,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602808462] [2022-07-19 10:54:18,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602808462] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:18,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:18,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-19 10:54:18,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314832936] [2022-07-19 10:54:18,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:18,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 10:54:18,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:18,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 10:54:18,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-07-19 10:54:18,965 INFO L87 Difference]: Start difference. First operand 685 states and 939 transitions. Second operand has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:19,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:19,719 INFO L93 Difference]: Finished difference Result 733 states and 1017 transitions. [2022-07-19 10:54:19,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 10:54:19,720 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2022-07-19 10:54:19,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:19,723 INFO L225 Difference]: With dead ends: 733 [2022-07-19 10:54:19,723 INFO L226 Difference]: Without dead ends: 713 [2022-07-19 10:54:19,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-07-19 10:54:19,724 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 149 mSDsluCounter, 3932 mSDsCounter, 0 mSdLazyCounter, 1545 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 4419 SdHoareTripleChecker+Invalid, 1606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:19,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 4419 Invalid, 1606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1545 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 10:54:19,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-07-19 10:54:19,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 683. [2022-07-19 10:54:19,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 572 states have (on average 1.3234265734265733) internal successors, (757), 580 states have internal predecessors, (757), 69 states have call successors, (69), 30 states have call predecessors, (69), 41 states have return successors, (109), 72 states have call predecessors, (109), 65 states have call successors, (109) [2022-07-19 10:54:19,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 935 transitions. [2022-07-19 10:54:19,761 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 935 transitions. Word has length 48 [2022-07-19 10:54:19,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:19,762 INFO L495 AbstractCegarLoop]: Abstraction has 683 states and 935 transitions. [2022-07-19 10:54:19,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:19,762 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 935 transitions. [2022-07-19 10:54:19,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-19 10:54:19,764 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:19,764 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:19,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-19 10:54:19,764 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:19,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:19,765 INFO L85 PathProgramCache]: Analyzing trace with hash -273874573, now seen corresponding path program 1 times [2022-07-19 10:54:19,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:19,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772105529] [2022-07-19 10:54:19,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:19,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:19,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:54:19,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:19,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 10:54:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:19,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:19,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772105529] [2022-07-19 10:54:19,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772105529] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:19,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:19,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:54:19,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150133477] [2022-07-19 10:54:19,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:19,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:54:19,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:19,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:54:19,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:54:19,796 INFO L87 Difference]: Start difference. First operand 683 states and 935 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:20,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:20,044 INFO L93 Difference]: Finished difference Result 939 states and 1289 transitions. [2022-07-19 10:54:20,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 10:54:20,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (3), 3 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 48 [2022-07-19 10:54:20,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:20,047 INFO L225 Difference]: With dead ends: 939 [2022-07-19 10:54:20,047 INFO L226 Difference]: Without dead ends: 639 [2022-07-19 10:54:20,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:54:20,049 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 174 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:20,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 1223 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:54:20,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-07-19 10:54:20,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 610. [2022-07-19 10:54:20,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 515 states have (on average 1.3184466019417476) internal successors, (679), 521 states have internal predecessors, (679), 60 states have call successors, (60), 27 states have call predecessors, (60), 34 states have return successors, (73), 61 states have call predecessors, (73), 56 states have call successors, (73) [2022-07-19 10:54:20,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 812 transitions. [2022-07-19 10:54:20,084 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 812 transitions. Word has length 48 [2022-07-19 10:54:20,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:20,084 INFO L495 AbstractCegarLoop]: Abstraction has 610 states and 812 transitions. [2022-07-19 10:54:20,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:20,085 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 812 transitions. [2022-07-19 10:54:20,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-19 10:54:20,086 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:20,086 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:20,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-19 10:54:20,087 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:20,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:20,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1171724014, now seen corresponding path program 1 times [2022-07-19 10:54:20,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:20,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39891775] [2022-07-19 10:54:20,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:20,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:20,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:20,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 10:54:20,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:20,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-19 10:54:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:20,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:20,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:20,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39891775] [2022-07-19 10:54:20,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39891775] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:20,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:20,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 10:54:20,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290269007] [2022-07-19 10:54:20,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:20,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 10:54:20,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:20,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 10:54:20,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:54:20,143 INFO L87 Difference]: Start difference. First operand 610 states and 812 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), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:20,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:20,464 INFO L93 Difference]: Finished difference Result 704 states and 925 transitions. [2022-07-19 10:54:20,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:54:20,465 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), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2022-07-19 10:54:20,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:20,467 INFO L225 Difference]: With dead ends: 704 [2022-07-19 10:54:20,467 INFO L226 Difference]: Without dead ends: 678 [2022-07-19 10:54:20,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:54:20,467 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 337 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 2042 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:20,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 2042 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:54:20,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-07-19 10:54:20,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 616. [2022-07-19 10:54:20,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 520 states have (on average 1.3173076923076923) internal successors, (685), 526 states have internal predecessors, (685), 61 states have call successors, (61), 27 states have call predecessors, (61), 34 states have return successors, (74), 62 states have call predecessors, (74), 57 states have call successors, (74) [2022-07-19 10:54:20,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 820 transitions. [2022-07-19 10:54:20,502 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 820 transitions. Word has length 50 [2022-07-19 10:54:20,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:20,502 INFO L495 AbstractCegarLoop]: Abstraction has 616 states and 820 transitions. [2022-07-19 10:54:20,502 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), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:20,502 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 820 transitions. [2022-07-19 10:54:20,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-19 10:54:20,504 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:20,504 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:20,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-19 10:54:20,504 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:20,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:20,505 INFO L85 PathProgramCache]: Analyzing trace with hash 850113778, now seen corresponding path program 1 times [2022-07-19 10:54:20,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:20,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975884967] [2022-07-19 10:54:20,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:20,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:20,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 10:54:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:20,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 10:54:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:20,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 10:54:20,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:20,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 10:54:20,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:20,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:20,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:20,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975884967] [2022-07-19 10:54:20,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975884967] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:20,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:20,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 10:54:20,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708467875] [2022-07-19 10:54:20,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:20,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 10:54:20,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:20,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 10:54:20,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:54:20,562 INFO L87 Difference]: Start difference. First operand 616 states and 820 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-19 10:54:20,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:20,873 INFO L93 Difference]: Finished difference Result 733 states and 980 transitions. [2022-07-19 10:54:20,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 10:54:20,873 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2022-07-19 10:54:20,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:20,876 INFO L225 Difference]: With dead ends: 733 [2022-07-19 10:54:20,876 INFO L226 Difference]: Without dead ends: 628 [2022-07-19 10:54:20,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:54:20,877 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 191 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1149 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:20,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 1149 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:54:20,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-07-19 10:54:20,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 616. [2022-07-19 10:54:20,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 520 states have (on average 1.3134615384615385) internal successors, (683), 526 states have internal predecessors, (683), 61 states have call successors, (61), 27 states have call predecessors, (61), 34 states have return successors, (74), 62 states have call predecessors, (74), 57 states have call successors, (74) [2022-07-19 10:54:20,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 818 transitions. [2022-07-19 10:54:20,913 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 818 transitions. Word has length 53 [2022-07-19 10:54:20,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:20,913 INFO L495 AbstractCegarLoop]: Abstraction has 616 states and 818 transitions. [2022-07-19 10:54:20,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-19 10:54:20,914 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 818 transitions. [2022-07-19 10:54:20,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-19 10:54:20,915 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:20,916 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:20,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-19 10:54:20,916 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:20,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:20,916 INFO L85 PathProgramCache]: Analyzing trace with hash -381678341, now seen corresponding path program 1 times [2022-07-19 10:54:20,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:20,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421479457] [2022-07-19 10:54:20,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:20,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:20,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:20,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 10:54:20,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:20,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-19 10:54:20,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:20,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:20,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421479457] [2022-07-19 10:54:20,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421479457] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:20,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:20,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 10:54:20,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857567199] [2022-07-19 10:54:20,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:20,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 10:54:20,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:20,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 10:54:20,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:54:20,985 INFO L87 Difference]: Start difference. First operand 616 states and 818 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 7 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:21,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:21,404 INFO L93 Difference]: Finished difference Result 662 states and 877 transitions. [2022-07-19 10:54:21,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:54:21,405 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 7 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2022-07-19 10:54:21,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:21,407 INFO L225 Difference]: With dead ends: 662 [2022-07-19 10:54:21,407 INFO L226 Difference]: Without dead ends: 608 [2022-07-19 10:54:21,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-07-19 10:54:21,408 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 185 mSDsluCounter, 2604 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 3079 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:21,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 3079 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 10:54:21,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-07-19 10:54:21,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 589. [2022-07-19 10:54:21,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 498 states have (on average 1.2991967871485943) internal successors, (647), 504 states have internal predecessors, (647), 56 states have call successors, (56), 27 states have call predecessors, (56), 34 states have return successors, (68), 57 states have call predecessors, (68), 52 states have call successors, (68) [2022-07-19 10:54:21,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 771 transitions. [2022-07-19 10:54:21,435 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 771 transitions. Word has length 51 [2022-07-19 10:54:21,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:21,436 INFO L495 AbstractCegarLoop]: Abstraction has 589 states and 771 transitions. [2022-07-19 10:54:21,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 7 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:21,436 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 771 transitions. [2022-07-19 10:54:21,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-19 10:54:21,438 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:21,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:21,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-19 10:54:21,438 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:21,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:21,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1990060921, now seen corresponding path program 1 times [2022-07-19 10:54:21,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:21,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87352074] [2022-07-19 10:54:21,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:21,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:21,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:21,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 10:54:21,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:21,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-19 10:54:21,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:21,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:21,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:21,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87352074] [2022-07-19 10:54:21,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87352074] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:21,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:21,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 10:54:21,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336495506] [2022-07-19 10:54:21,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:21,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 10:54:21,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:21,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 10:54:21,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:54:21,483 INFO L87 Difference]: Start difference. First operand 589 states and 771 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:21,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:21,759 INFO L93 Difference]: Finished difference Result 642 states and 831 transitions. [2022-07-19 10:54:21,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:54:21,759 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2022-07-19 10:54:21,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:21,761 INFO L225 Difference]: With dead ends: 642 [2022-07-19 10:54:21,761 INFO L226 Difference]: Without dead ends: 595 [2022-07-19 10:54:21,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:54:21,762 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 98 mSDsluCounter, 1582 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 2000 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:21,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 2000 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:54:21,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-07-19 10:54:21,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 579. [2022-07-19 10:54:21,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 490 states have (on average 1.2959183673469388) internal successors, (635), 496 states have internal predecessors, (635), 54 states have call successors, (54), 27 states have call predecessors, (54), 34 states have return successors, (66), 55 states have call predecessors, (66), 50 states have call successors, (66) [2022-07-19 10:54:21,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 755 transitions. [2022-07-19 10:54:21,794 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 755 transitions. Word has length 51 [2022-07-19 10:54:21,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:21,795 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 755 transitions. [2022-07-19 10:54:21,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:21,795 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 755 transitions. [2022-07-19 10:54:21,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-19 10:54:21,797 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:21,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:21,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-19 10:54:21,797 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:21,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:21,798 INFO L85 PathProgramCache]: Analyzing trace with hash 105801563, now seen corresponding path program 1 times [2022-07-19 10:54:21,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:21,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610827637] [2022-07-19 10:54:21,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:21,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:21,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:21,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 10:54:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:21,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 10:54:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:21,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:21,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:21,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610827637] [2022-07-19 10:54:21,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610827637] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:21,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:21,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 10:54:21,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025483069] [2022-07-19 10:54:21,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:21,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 10:54:21,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:21,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 10:54:21,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:54:21,845 INFO L87 Difference]: Start difference. First operand 579 states and 755 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:22,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:22,095 INFO L93 Difference]: Finished difference Result 618 states and 801 transitions. [2022-07-19 10:54:22,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:54:22,096 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-07-19 10:54:22,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:22,097 INFO L225 Difference]: With dead ends: 618 [2022-07-19 10:54:22,097 INFO L226 Difference]: Without dead ends: 586 [2022-07-19 10:54:22,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:54:22,098 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 171 mSDsluCounter, 1335 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 1753 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:22,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 1753 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:54:22,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-07-19 10:54:22,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 574. [2022-07-19 10:54:22,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 486 states have (on average 1.2962962962962963) internal successors, (630), 492 states have internal predecessors, (630), 53 states have call successors, (53), 27 states have call predecessors, (53), 34 states have return successors, (65), 54 states have call predecessors, (65), 49 states have call successors, (65) [2022-07-19 10:54:22,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 748 transitions. [2022-07-19 10:54:22,130 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 748 transitions. Word has length 52 [2022-07-19 10:54:22,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:22,130 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 748 transitions. [2022-07-19 10:54:22,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:22,131 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 748 transitions. [2022-07-19 10:54:22,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-19 10:54:22,132 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:22,132 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:22,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-07-19 10:54:22,133 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:22,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:22,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1444104729, now seen corresponding path program 1 times [2022-07-19 10:54:22,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:22,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681822329] [2022-07-19 10:54:22,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:22,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:22,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:22,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 10:54:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:22,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 10:54:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:22,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:22,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:22,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681822329] [2022-07-19 10:54:22,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681822329] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:22,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:22,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:54:22,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798402088] [2022-07-19 10:54:22,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:22,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:54:22,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:22,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:54:22,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:54:22,172 INFO L87 Difference]: Start difference. First operand 574 states and 748 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 3 states have internal predecessors, (47), 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) [2022-07-19 10:54:22,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:22,508 INFO L93 Difference]: Finished difference Result 691 states and 900 transitions. [2022-07-19 10:54:22,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:54:22,508 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 3 states have internal predecessors, (47), 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 52 [2022-07-19 10:54:22,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:22,510 INFO L225 Difference]: With dead ends: 691 [2022-07-19 10:54:22,510 INFO L226 Difference]: Without dead ends: 683 [2022-07-19 10:54:22,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:54:22,511 INFO L413 NwaCegarLoop]: 467 mSDtfsCounter, 217 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:22,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 1329 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:54:22,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-07-19 10:54:22,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 602. [2022-07-19 10:54:22,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 512 states have (on average 1.291015625) internal successors, (661), 518 states have internal predecessors, (661), 53 states have call successors, (53), 27 states have call predecessors, (53), 36 states have return successors, (67), 56 states have call predecessors, (67), 49 states have call successors, (67) [2022-07-19 10:54:22,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 781 transitions. [2022-07-19 10:54:22,547 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 781 transitions. Word has length 52 [2022-07-19 10:54:22,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:22,547 INFO L495 AbstractCegarLoop]: Abstraction has 602 states and 781 transitions. [2022-07-19 10:54:22,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 3 states have internal predecessors, (47), 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) [2022-07-19 10:54:22,547 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 781 transitions. [2022-07-19 10:54:22,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-19 10:54:22,549 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:22,549 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:22,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-07-19 10:54:22,549 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:22,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:22,549 INFO L85 PathProgramCache]: Analyzing trace with hash -2032610889, now seen corresponding path program 1 times [2022-07-19 10:54:22,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:22,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170614958] [2022-07-19 10:54:22,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:22,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:22,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 10:54:22,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:22,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 10:54:22,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:22,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:22,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:22,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170614958] [2022-07-19 10:54:22,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170614958] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:22,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:22,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 10:54:22,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609705989] [2022-07-19 10:54:22,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:22,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 10:54:22,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:22,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 10:54:22,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:54:22,598 INFO L87 Difference]: Start difference. First operand 602 states and 781 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:23,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:23,076 INFO L93 Difference]: Finished difference Result 687 states and 894 transitions. [2022-07-19 10:54:23,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:54:23,076 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2022-07-19 10:54:23,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:23,078 INFO L225 Difference]: With dead ends: 687 [2022-07-19 10:54:23,078 INFO L226 Difference]: Without dead ends: 681 [2022-07-19 10:54:23,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-07-19 10:54:23,079 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 716 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 1535 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:23,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [752 Valid, 1535 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 10:54:23,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-07-19 10:54:23,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 602. [2022-07-19 10:54:23,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 512 states have (on average 1.2890625) internal successors, (660), 518 states have internal predecessors, (660), 53 states have call successors, (53), 27 states have call predecessors, (53), 36 states have return successors, (67), 56 states have call predecessors, (67), 49 states have call successors, (67) [2022-07-19 10:54:23,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 780 transitions. [2022-07-19 10:54:23,116 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 780 transitions. Word has length 53 [2022-07-19 10:54:23,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:23,116 INFO L495 AbstractCegarLoop]: Abstraction has 602 states and 780 transitions. [2022-07-19 10:54:23,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:23,116 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 780 transitions. [2022-07-19 10:54:23,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-19 10:54:23,117 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:23,118 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:23,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-07-19 10:54:23,118 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:23,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:23,118 INFO L85 PathProgramCache]: Analyzing trace with hash 2028580847, now seen corresponding path program 1 times [2022-07-19 10:54:23,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:23,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771328016] [2022-07-19 10:54:23,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:23,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:23,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:23,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 10:54:23,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:23,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 10:54:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:23,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 10:54:23,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:23,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:23,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:23,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771328016] [2022-07-19 10:54:23,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771328016] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:23,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:23,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-19 10:54:23,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546762261] [2022-07-19 10:54:23,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:23,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 10:54:23,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:23,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 10:54:23,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-07-19 10:54:23,266 INFO L87 Difference]: Start difference. First operand 602 states and 780 transitions. Second operand has 16 states, 15 states have (on average 3.2) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 10:54:24,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:24,100 INFO L93 Difference]: Finished difference Result 634 states and 819 transitions. [2022-07-19 10:54:24,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 10:54:24,101 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.2) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 55 [2022-07-19 10:54:24,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:24,103 INFO L225 Difference]: With dead ends: 634 [2022-07-19 10:54:24,103 INFO L226 Difference]: Without dead ends: 610 [2022-07-19 10:54:24,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-07-19 10:54:24,104 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 252 mSDsluCounter, 3530 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 3944 SdHoareTripleChecker+Invalid, 1701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:24,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 3944 Invalid, 1701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 10:54:24,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-07-19 10:54:24,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 598. [2022-07-19 10:54:24,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 509 states have (on average 1.2888015717092338) internal successors, (656), 515 states have internal predecessors, (656), 52 states have call successors, (52), 27 states have call predecessors, (52), 36 states have return successors, (66), 55 states have call predecessors, (66), 48 states have call successors, (66) [2022-07-19 10:54:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 774 transitions. [2022-07-19 10:54:24,141 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 774 transitions. Word has length 55 [2022-07-19 10:54:24,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:24,142 INFO L495 AbstractCegarLoop]: Abstraction has 598 states and 774 transitions. [2022-07-19 10:54:24,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.2) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 10:54:24,142 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 774 transitions. [2022-07-19 10:54:24,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-19 10:54:24,143 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:24,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:24,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-19 10:54:24,144 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:24,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:24,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1717160597, now seen corresponding path program 1 times [2022-07-19 10:54:24,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:24,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681507424] [2022-07-19 10:54:24,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:24,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:24,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:24,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 10:54:24,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:24,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-19 10:54:24,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:24,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:24,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:24,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681507424] [2022-07-19 10:54:24,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681507424] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:24,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:24,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 10:54:24,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621601124] [2022-07-19 10:54:24,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:24,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 10:54:24,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:24,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 10:54:24,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:54:24,189 INFO L87 Difference]: Start difference. First operand 598 states and 774 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:24,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:24,492 INFO L93 Difference]: Finished difference Result 637 states and 820 transitions. [2022-07-19 10:54:24,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:54:24,493 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-07-19 10:54:24,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:24,495 INFO L225 Difference]: With dead ends: 637 [2022-07-19 10:54:24,495 INFO L226 Difference]: Without dead ends: 605 [2022-07-19 10:54:24,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:54:24,496 INFO L413 NwaCegarLoop]: 405 mSDtfsCounter, 171 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 1696 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:24,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 1696 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:54:24,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-07-19 10:54:24,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 593. [2022-07-19 10:54:24,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 505 states have (on average 1.2891089108910891) internal successors, (651), 511 states have internal predecessors, (651), 51 states have call successors, (51), 27 states have call predecessors, (51), 36 states have return successors, (65), 54 states have call predecessors, (65), 47 states have call successors, (65) [2022-07-19 10:54:24,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 767 transitions. [2022-07-19 10:54:24,549 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 767 transitions. Word has length 54 [2022-07-19 10:54:24,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:24,549 INFO L495 AbstractCegarLoop]: Abstraction has 593 states and 767 transitions. [2022-07-19 10:54:24,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:24,549 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 767 transitions. [2022-07-19 10:54:24,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-19 10:54:24,551 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:24,551 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:24,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-07-19 10:54:24,552 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:24,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:24,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1513646241, now seen corresponding path program 1 times [2022-07-19 10:54:24,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:24,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605386335] [2022-07-19 10:54:24,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:24,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:24,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-19 10:54:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:24,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-19 10:54:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:24,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:24,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:24,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605386335] [2022-07-19 10:54:24,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605386335] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:24,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:24,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-19 10:54:24,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279887544] [2022-07-19 10:54:24,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:24,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 10:54:24,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:24,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 10:54:24,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-19 10:54:24,647 INFO L87 Difference]: Start difference. First operand 593 states and 767 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 8 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:25,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:25,062 INFO L93 Difference]: Finished difference Result 628 states and 810 transitions. [2022-07-19 10:54:25,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 10:54:25,063 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 8 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-07-19 10:54:25,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:25,064 INFO L225 Difference]: With dead ends: 628 [2022-07-19 10:54:25,064 INFO L226 Difference]: Without dead ends: 602 [2022-07-19 10:54:25,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-07-19 10:54:25,065 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 232 mSDsluCounter, 2698 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 3112 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:25,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 3112 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:54:25,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2022-07-19 10:54:25,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 590. [2022-07-19 10:54:25,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 503 states have (on average 1.2882703777335984) internal successors, (648), 509 states have internal predecessors, (648), 50 states have call successors, (50), 27 states have call predecessors, (50), 36 states have return successors, (64), 53 states have call predecessors, (64), 46 states have call successors, (64) [2022-07-19 10:54:25,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 762 transitions. [2022-07-19 10:54:25,099 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 762 transitions. Word has length 54 [2022-07-19 10:54:25,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:25,099 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 762 transitions. [2022-07-19 10:54:25,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 8 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:25,100 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 762 transitions. [2022-07-19 10:54:25,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-19 10:54:25,101 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:25,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:25,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-07-19 10:54:25,102 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:25,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:25,102 INFO L85 PathProgramCache]: Analyzing trace with hash 773886590, now seen corresponding path program 1 times [2022-07-19 10:54:25,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:25,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411149044] [2022-07-19 10:54:25,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:25,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:25,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:25,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 10:54:25,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:25,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 10:54:25,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:25,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:25,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:25,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411149044] [2022-07-19 10:54:25,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411149044] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:25,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:25,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 10:54:25,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740059336] [2022-07-19 10:54:25,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:25,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 10:54:25,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:25,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 10:54:25,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:54:25,163 INFO L87 Difference]: Start difference. First operand 590 states and 762 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:25,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:25,631 INFO L93 Difference]: Finished difference Result 673 states and 872 transitions. [2022-07-19 10:54:25,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 10:54:25,632 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-07-19 10:54:25,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:25,633 INFO L225 Difference]: With dead ends: 673 [2022-07-19 10:54:25,633 INFO L226 Difference]: Without dead ends: 669 [2022-07-19 10:54:25,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-07-19 10:54:25,634 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 696 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:25,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 1461 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:54:25,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-07-19 10:54:25,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 588. [2022-07-19 10:54:25,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 501 states have (on average 1.2874251497005988) internal successors, (645), 507 states have internal predecessors, (645), 50 states have call successors, (50), 27 states have call predecessors, (50), 36 states have return successors, (64), 53 states have call predecessors, (64), 46 states have call successors, (64) [2022-07-19 10:54:25,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 759 transitions. [2022-07-19 10:54:25,672 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 759 transitions. Word has length 54 [2022-07-19 10:54:25,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:25,673 INFO L495 AbstractCegarLoop]: Abstraction has 588 states and 759 transitions. [2022-07-19 10:54:25,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:25,673 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 759 transitions. [2022-07-19 10:54:25,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-19 10:54:25,674 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:25,675 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:25,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-07-19 10:54:25,675 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:25,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:25,675 INFO L85 PathProgramCache]: Analyzing trace with hash 774163420, now seen corresponding path program 1 times [2022-07-19 10:54:25,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:25,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440124799] [2022-07-19 10:54:25,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:25,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:25,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 10:54:25,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:25,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 10:54:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:25,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:25,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:25,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440124799] [2022-07-19 10:54:25,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440124799] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:25,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:25,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-19 10:54:25,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813021450] [2022-07-19 10:54:25,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:25,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 10:54:25,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:25,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 10:54:25,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-19 10:54:25,792 INFO L87 Difference]: Start difference. First operand 588 states and 759 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 8 states have internal predecessors, (49), 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) [2022-07-19 10:54:26,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:26,399 INFO L93 Difference]: Finished difference Result 610 states and 786 transitions. [2022-07-19 10:54:26,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 10:54:26,399 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 8 states have internal predecessors, (49), 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 54 [2022-07-19 10:54:26,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:26,400 INFO L225 Difference]: With dead ends: 610 [2022-07-19 10:54:26,400 INFO L226 Difference]: Without dead ends: 562 [2022-07-19 10:54:26,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-07-19 10:54:26,401 INFO L413 NwaCegarLoop]: 383 mSDtfsCounter, 211 mSDsluCounter, 2380 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 2763 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:26,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 2763 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1143 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 10:54:26,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-07-19 10:54:26,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 546. [2022-07-19 10:54:26,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 461 states have (on average 1.2776572668112798) internal successors, (589), 467 states have internal predecessors, (589), 50 states have call successors, (50), 27 states have call predecessors, (50), 34 states have return successors, (62), 51 states have call predecessors, (62), 46 states have call successors, (62) [2022-07-19 10:54:26,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 701 transitions. [2022-07-19 10:54:26,434 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 701 transitions. Word has length 54 [2022-07-19 10:54:26,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:26,434 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 701 transitions. [2022-07-19 10:54:26,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 8 states have internal predecessors, (49), 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) [2022-07-19 10:54:26,435 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 701 transitions. [2022-07-19 10:54:26,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-19 10:54:26,436 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:26,436 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] [2022-07-19 10:54:26,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-07-19 10:54:26,436 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:26,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:26,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1350619309, now seen corresponding path program 1 times [2022-07-19 10:54:26,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:26,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322431436] [2022-07-19 10:54:26,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:26,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:26,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:26,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 10:54:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:26,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 10:54:26,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:26,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 10:54:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:26,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:26,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:26,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322431436] [2022-07-19 10:54:26,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322431436] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:26,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:26,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 10:54:26,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464067769] [2022-07-19 10:54:26,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:26,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 10:54:26,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:26,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 10:54:26,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:54:26,492 INFO L87 Difference]: Start difference. First operand 546 states and 701 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:54:26,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:26,900 INFO L93 Difference]: Finished difference Result 607 states and 771 transitions. [2022-07-19 10:54:26,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 10:54:26,900 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2022-07-19 10:54:26,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:26,902 INFO L225 Difference]: With dead ends: 607 [2022-07-19 10:54:26,902 INFO L226 Difference]: Without dead ends: 576 [2022-07-19 10:54:26,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-19 10:54:26,903 INFO L413 NwaCegarLoop]: 405 mSDtfsCounter, 187 mSDsluCounter, 1362 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:26,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 1767 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:54:26,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-07-19 10:54:26,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 546. [2022-07-19 10:54:26,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 461 states have (on average 1.2754880694143167) internal successors, (588), 467 states have internal predecessors, (588), 50 states have call successors, (50), 27 states have call predecessors, (50), 34 states have return successors, (62), 51 states have call predecessors, (62), 46 states have call successors, (62) [2022-07-19 10:54:26,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 700 transitions. [2022-07-19 10:54:26,939 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 700 transitions. Word has length 56 [2022-07-19 10:54:26,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:26,939 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 700 transitions. [2022-07-19 10:54:26,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:54:26,939 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 700 transitions. [2022-07-19 10:54:26,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-19 10:54:26,941 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:26,941 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] [2022-07-19 10:54:26,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-07-19 10:54:26,941 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:26,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:26,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1373251563, now seen corresponding path program 1 times [2022-07-19 10:54:26,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:26,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563303690] [2022-07-19 10:54:26,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:26,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:26,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:26,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 10:54:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:27,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 10:54:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:27,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 10:54:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:27,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:27,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:27,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563303690] [2022-07-19 10:54:27,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563303690] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:27,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:27,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 10:54:27,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920498462] [2022-07-19 10:54:27,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:27,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 10:54:27,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:27,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 10:54:27,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-07-19 10:54:27,063 INFO L87 Difference]: Start difference. First operand 546 states and 700 transitions. Second operand has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 10 states have internal predecessors, (49), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 10:54:27,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:27,703 INFO L93 Difference]: Finished difference Result 601 states and 767 transitions. [2022-07-19 10:54:27,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 10:54:27,703 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 10 states have internal predecessors, (49), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 56 [2022-07-19 10:54:27,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:27,705 INFO L225 Difference]: With dead ends: 601 [2022-07-19 10:54:27,705 INFO L226 Difference]: Without dead ends: 571 [2022-07-19 10:54:27,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-07-19 10:54:27,708 INFO L413 NwaCegarLoop]: 399 mSDtfsCounter, 276 mSDsluCounter, 2836 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 3235 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:27,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 3235 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 10:54:27,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-07-19 10:54:27,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 541. [2022-07-19 10:54:27,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 457 states have (on average 1.2713347921225382) internal successors, (581), 463 states have internal predecessors, (581), 49 states have call successors, (49), 27 states have call predecessors, (49), 34 states have return successors, (60), 50 states have call predecessors, (60), 45 states have call successors, (60) [2022-07-19 10:54:27,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 690 transitions. [2022-07-19 10:54:27,744 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 690 transitions. Word has length 56 [2022-07-19 10:54:27,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:27,744 INFO L495 AbstractCegarLoop]: Abstraction has 541 states and 690 transitions. [2022-07-19 10:54:27,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 10 states have internal predecessors, (49), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 10:54:27,744 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 690 transitions. [2022-07-19 10:54:27,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-19 10:54:27,745 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:27,745 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] [2022-07-19 10:54:27,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-07-19 10:54:27,746 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:27,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:27,746 INFO L85 PathProgramCache]: Analyzing trace with hash -801787505, now seen corresponding path program 1 times [2022-07-19 10:54:27,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:27,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526790066] [2022-07-19 10:54:27,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:27,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:27,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:27,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 10:54:27,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:27,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 10:54:27,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:27,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 10:54:27,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:27,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:27,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526790066] [2022-07-19 10:54:27,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526790066] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:27,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:27,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 10:54:27,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599733383] [2022-07-19 10:54:27,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:27,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 10:54:27,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:27,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 10:54:27,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:54:27,806 INFO L87 Difference]: Start difference. First operand 541 states and 690 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:54:28,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:28,165 INFO L93 Difference]: Finished difference Result 584 states and 740 transitions. [2022-07-19 10:54:28,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 10:54:28,166 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2022-07-19 10:54:28,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:28,167 INFO L225 Difference]: With dead ends: 584 [2022-07-19 10:54:28,168 INFO L226 Difference]: Without dead ends: 547 [2022-07-19 10:54:28,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-19 10:54:28,168 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 261 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 1436 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:28,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 1436 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:54:28,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-07-19 10:54:28,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 535. [2022-07-19 10:54:28,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 452 states have (on average 1.2721238938053097) internal successors, (575), 458 states have internal predecessors, (575), 48 states have call successors, (48), 27 states have call predecessors, (48), 34 states have return successors, (59), 49 states have call predecessors, (59), 44 states have call successors, (59) [2022-07-19 10:54:28,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 682 transitions. [2022-07-19 10:54:28,203 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 682 transitions. Word has length 56 [2022-07-19 10:54:28,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:28,204 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 682 transitions. [2022-07-19 10:54:28,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:54:28,204 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 682 transitions. [2022-07-19 10:54:28,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-19 10:54:28,205 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:28,205 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:28,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-07-19 10:54:28,206 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:28,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:28,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1511727278, now seen corresponding path program 1 times [2022-07-19 10:54:28,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:28,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622743139] [2022-07-19 10:54:28,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:28,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:28,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:28,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 10:54:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:28,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-19 10:54:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:28,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 10:54:28,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:28,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:28,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:28,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622743139] [2022-07-19 10:54:28,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622743139] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:28,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:28,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 10:54:28,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106964264] [2022-07-19 10:54:28,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:28,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 10:54:28,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:28,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 10:54:28,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:54:28,260 INFO L87 Difference]: Start difference. First operand 535 states and 682 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:54:28,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:28,689 INFO L93 Difference]: Finished difference Result 578 states and 732 transitions. [2022-07-19 10:54:28,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 10:54:28,690 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2022-07-19 10:54:28,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:28,692 INFO L225 Difference]: With dead ends: 578 [2022-07-19 10:54:28,692 INFO L226 Difference]: Without dead ends: 535 [2022-07-19 10:54:28,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-19 10:54:28,693 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 168 mSDsluCounter, 1438 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1805 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:28,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 1805 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 10:54:28,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-07-19 10:54:28,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 523. [2022-07-19 10:54:28,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 441 states have (on average 1.2675736961451247) internal successors, (559), 447 states have internal predecessors, (559), 47 states have call successors, (47), 27 states have call predecessors, (47), 34 states have return successors, (58), 48 states have call predecessors, (58), 43 states have call successors, (58) [2022-07-19 10:54:28,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 664 transitions. [2022-07-19 10:54:28,729 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 664 transitions. Word has length 58 [2022-07-19 10:54:28,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:28,730 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 664 transitions. [2022-07-19 10:54:28,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:54:28,730 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 664 transitions. [2022-07-19 10:54:28,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-19 10:54:28,731 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:28,731 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:28,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-07-19 10:54:28,732 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:28,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:28,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1341431007, now seen corresponding path program 1 times [2022-07-19 10:54:28,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:28,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296582693] [2022-07-19 10:54:28,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:28,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:28,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:28,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 10:54:28,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:28,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-19 10:54:28,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:28,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 10:54:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:28,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 10:54:28,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:28,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:28,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296582693] [2022-07-19 10:54:28,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296582693] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:28,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:28,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 10:54:28,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302245884] [2022-07-19 10:54:28,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:28,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 10:54:28,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:28,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 10:54:28,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-07-19 10:54:28,882 INFO L87 Difference]: Start difference. First operand 523 states and 664 transitions. Second operand has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 10 states have internal predecessors, (50), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-19 10:54:29,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:29,650 INFO L93 Difference]: Finished difference Result 571 states and 720 transitions. [2022-07-19 10:54:29,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 10:54:29,650 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 10 states have internal predecessors, (50), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 59 [2022-07-19 10:54:29,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:29,652 INFO L225 Difference]: With dead ends: 571 [2022-07-19 10:54:29,652 INFO L226 Difference]: Without dead ends: 551 [2022-07-19 10:54:29,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-07-19 10:54:29,653 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 249 mSDsluCounter, 2903 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 3259 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:29,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 3259 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1488 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 10:54:29,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-07-19 10:54:29,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 521. [2022-07-19 10:54:29,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 440 states have (on average 1.2659090909090909) internal successors, (557), 446 states have internal predecessors, (557), 46 states have call successors, (46), 27 states have call predecessors, (46), 34 states have return successors, (57), 47 states have call predecessors, (57), 42 states have call successors, (57) [2022-07-19 10:54:29,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 660 transitions. [2022-07-19 10:54:29,687 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 660 transitions. Word has length 59 [2022-07-19 10:54:29,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:29,687 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 660 transitions. [2022-07-19 10:54:29,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 10 states have internal predecessors, (50), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-19 10:54:29,687 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 660 transitions. [2022-07-19 10:54:29,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-19 10:54:29,688 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:29,688 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] [2022-07-19 10:54:29,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-07-19 10:54:29,689 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:29,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:29,689 INFO L85 PathProgramCache]: Analyzing trace with hash 477751716, now seen corresponding path program 1 times [2022-07-19 10:54:29,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:29,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289989481] [2022-07-19 10:54:29,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:29,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:29,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 10:54:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:29,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 10:54:29,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:29,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:29,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:29,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289989481] [2022-07-19 10:54:29,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289989481] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:29,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:29,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-19 10:54:29,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866473358] [2022-07-19 10:54:29,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:29,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 10:54:29,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:29,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 10:54:29,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-07-19 10:54:29,822 INFO L87 Difference]: Start difference. First operand 521 states and 660 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 9 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) [2022-07-19 10:54:30,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:30,456 INFO L93 Difference]: Finished difference Result 549 states and 694 transitions. [2022-07-19 10:54:30,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 10:54:30,456 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 9 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 57 [2022-07-19 10:54:30,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:30,457 INFO L225 Difference]: With dead ends: 549 [2022-07-19 10:54:30,457 INFO L226 Difference]: Without dead ends: 531 [2022-07-19 10:54:30,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-07-19 10:54:30,458 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 115 mSDsluCounter, 2538 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 2887 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:30,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 2887 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 10:54:30,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-07-19 10:54:30,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 519. [2022-07-19 10:54:30,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 439 states have (on average 1.2642369020501139) internal successors, (555), 445 states have internal predecessors, (555), 45 states have call successors, (45), 27 states have call predecessors, (45), 34 states have return successors, (56), 46 states have call predecessors, (56), 41 states have call successors, (56) [2022-07-19 10:54:30,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 656 transitions. [2022-07-19 10:54:30,492 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 656 transitions. Word has length 57 [2022-07-19 10:54:30,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:30,492 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 656 transitions. [2022-07-19 10:54:30,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 9 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) [2022-07-19 10:54:30,492 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 656 transitions. [2022-07-19 10:54:30,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-19 10:54:30,493 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:30,493 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:30,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-07-19 10:54:30,493 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:30,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:30,494 INFO L85 PathProgramCache]: Analyzing trace with hash 999008539, now seen corresponding path program 1 times [2022-07-19 10:54:30,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:30,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905406110] [2022-07-19 10:54:30,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:30,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:30,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 10:54:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:30,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 10:54:30,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:30,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 10:54:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:30,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:30,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:30,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905406110] [2022-07-19 10:54:30,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905406110] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:30,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:30,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-19 10:54:30,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193032211] [2022-07-19 10:54:30,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:30,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 10:54:30,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:30,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 10:54:30,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-07-19 10:54:30,613 INFO L87 Difference]: Start difference. First operand 519 states and 656 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 10:54:31,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:31,826 INFO L93 Difference]: Finished difference Result 1057 states and 1338 transitions. [2022-07-19 10:54:31,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-19 10:54:31,827 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 58 [2022-07-19 10:54:31,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:31,829 INFO L225 Difference]: With dead ends: 1057 [2022-07-19 10:54:31,829 INFO L226 Difference]: Without dead ends: 940 [2022-07-19 10:54:31,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=1153, Unknown=0, NotChecked=0, Total=1406 [2022-07-19 10:54:31,830 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 943 mSDsluCounter, 1927 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 964 SdHoareTripleChecker+Valid, 2331 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:31,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [964 Valid, 2331 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 10:54:31,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2022-07-19 10:54:31,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 716. [2022-07-19 10:54:31,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 601 states have (on average 1.276206322795341) internal successors, (767), 614 states have internal predecessors, (767), 63 states have call successors, (63), 40 states have call predecessors, (63), 51 states have return successors, (82), 61 states have call predecessors, (82), 59 states have call successors, (82) [2022-07-19 10:54:31,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 912 transitions. [2022-07-19 10:54:31,888 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 912 transitions. Word has length 58 [2022-07-19 10:54:31,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:31,888 INFO L495 AbstractCegarLoop]: Abstraction has 716 states and 912 transitions. [2022-07-19 10:54:31,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 10:54:31,888 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 912 transitions. [2022-07-19 10:54:31,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-19 10:54:31,890 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:31,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:31,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-07-19 10:54:31,890 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:31,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:31,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1875027545, now seen corresponding path program 1 times [2022-07-19 10:54:31,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:31,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680802312] [2022-07-19 10:54:31,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:31,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:31,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 10:54:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:31,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 10:54:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:31,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 10:54:31,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:31,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:31,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:31,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680802312] [2022-07-19 10:54:31,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680802312] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:31,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:31,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 10:54:31,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385077495] [2022-07-19 10:54:31,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:31,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 10:54:31,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:31,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 10:54:31,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:54:31,944 INFO L87 Difference]: Start difference. First operand 716 states and 912 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 10:54:32,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:32,485 INFO L93 Difference]: Finished difference Result 1041 states and 1317 transitions. [2022-07-19 10:54:32,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 10:54:32,486 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 58 [2022-07-19 10:54:32,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:32,488 INFO L225 Difference]: With dead ends: 1041 [2022-07-19 10:54:32,488 INFO L226 Difference]: Without dead ends: 957 [2022-07-19 10:54:32,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-07-19 10:54:32,489 INFO L413 NwaCegarLoop]: 652 mSDtfsCounter, 1092 mSDsluCounter, 1186 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1133 SdHoareTripleChecker+Valid, 1838 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:32,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1133 Valid, 1838 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 10:54:32,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-07-19 10:54:32,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 532. [2022-07-19 10:54:32,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 451 states have (on average 1.2594235033259424) internal successors, (568), 456 states have internal predecessors, (568), 45 states have call successors, (45), 29 states have call predecessors, (45), 35 states have return successors, (56), 46 states have call predecessors, (56), 41 states have call successors, (56) [2022-07-19 10:54:32,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 669 transitions. [2022-07-19 10:54:32,535 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 669 transitions. Word has length 58 [2022-07-19 10:54:32,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:32,535 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 669 transitions. [2022-07-19 10:54:32,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 10:54:32,536 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 669 transitions. [2022-07-19 10:54:32,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-19 10:54:32,537 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:32,537 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:32,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-07-19 10:54:32,537 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:32,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:32,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1125550286, now seen corresponding path program 1 times [2022-07-19 10:54:32,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:32,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461966376] [2022-07-19 10:54:32,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:32,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:32,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:32,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 10:54:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:32,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-19 10:54:32,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:32,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:54:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:32,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 10:54:32,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:32,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:32,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461966376] [2022-07-19 10:54:32,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461966376] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:32,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:32,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 10:54:32,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251529229] [2022-07-19 10:54:32,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:32,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 10:54:32,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:32,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 10:54:32,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-07-19 10:54:32,673 INFO L87 Difference]: Start difference. First operand 532 states and 669 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 10 states have internal predecessors, (51), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-19 10:54:33,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:33,441 INFO L93 Difference]: Finished difference Result 567 states and 713 transitions. [2022-07-19 10:54:33,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 10:54:33,441 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 10 states have internal predecessors, (51), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 60 [2022-07-19 10:54:33,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:33,442 INFO L225 Difference]: With dead ends: 567 [2022-07-19 10:54:33,442 INFO L226 Difference]: Without dead ends: 535 [2022-07-19 10:54:33,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-07-19 10:54:33,443 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 303 mSDsluCounter, 2407 mSDsCounter, 0 mSdLazyCounter, 1378 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 2768 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:33,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 2768 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1378 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 10:54:33,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-07-19 10:54:33,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 523. [2022-07-19 10:54:33,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 444 states have (on average 1.2567567567567568) internal successors, (558), 449 states have internal predecessors, (558), 43 states have call successors, (43), 29 states have call predecessors, (43), 35 states have return successors, (53), 44 states have call predecessors, (53), 39 states have call successors, (53) [2022-07-19 10:54:33,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 654 transitions. [2022-07-19 10:54:33,491 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 654 transitions. Word has length 60 [2022-07-19 10:54:33,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:33,491 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 654 transitions. [2022-07-19 10:54:33,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 10 states have internal predecessors, (51), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-19 10:54:33,491 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 654 transitions. [2022-07-19 10:54:33,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-19 10:54:33,492 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:33,492 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:33,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-07-19 10:54:33,493 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:33,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:33,493 INFO L85 PathProgramCache]: Analyzing trace with hash 2088220112, now seen corresponding path program 1 times [2022-07-19 10:54:33,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:33,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948652663] [2022-07-19 10:54:33,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:33,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:33,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:54:33,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:33,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-19 10:54:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:33,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:33,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:33,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948652663] [2022-07-19 10:54:33,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948652663] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:33,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:33,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 10:54:33,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511698650] [2022-07-19 10:54:33,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:33,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 10:54:33,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:33,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 10:54:33,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:54:33,541 INFO L87 Difference]: Start difference. First operand 523 states and 654 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:33,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:33,785 INFO L93 Difference]: Finished difference Result 562 states and 699 transitions. [2022-07-19 10:54:33,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:54:33,786 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-07-19 10:54:33,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:33,787 INFO L225 Difference]: With dead ends: 562 [2022-07-19 10:54:33,788 INFO L226 Difference]: Without dead ends: 527 [2022-07-19 10:54:33,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:54:33,788 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 92 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 1579 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:33,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 1579 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:54:33,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-07-19 10:54:33,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 515. [2022-07-19 10:54:33,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 437 states have (on average 1.2562929061784898) internal successors, (549), 442 states have internal predecessors, (549), 42 states have call successors, (42), 29 states have call predecessors, (42), 35 states have return successors, (51), 43 states have call predecessors, (51), 38 states have call successors, (51) [2022-07-19 10:54:33,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 642 transitions. [2022-07-19 10:54:33,835 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 642 transitions. Word has length 58 [2022-07-19 10:54:33,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:33,836 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 642 transitions. [2022-07-19 10:54:33,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:54:33,836 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 642 transitions. [2022-07-19 10:54:33,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-19 10:54:33,837 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:33,837 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 10:54:33,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-07-19 10:54:33,838 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:33,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:33,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1074633973, now seen corresponding path program 1 times [2022-07-19 10:54:33,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:33,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855616509] [2022-07-19 10:54:33,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:33,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:33,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:33,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 10:54:33,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:33,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 10:54:33,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:33,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 10:54:33,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:33,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 10:54:33,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:33,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855616509] [2022-07-19 10:54:33,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855616509] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:33,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:33,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 10:54:33,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252691863] [2022-07-19 10:54:33,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:33,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 10:54:33,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:33,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 10:54:33,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:54:33,886 INFO L87 Difference]: Start difference. First operand 515 states and 642 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:54:34,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:34,109 INFO L93 Difference]: Finished difference Result 554 states and 687 transitions. [2022-07-19 10:54:34,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:54:34,110 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2022-07-19 10:54:34,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:34,111 INFO L225 Difference]: With dead ends: 554 [2022-07-19 10:54:34,111 INFO L226 Difference]: Without dead ends: 517 [2022-07-19 10:54:34,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:54:34,111 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 156 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1361 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:34,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 1361 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:54:34,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-07-19 10:54:34,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 505. [2022-07-19 10:54:34,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 429 states have (on average 1.2564102564102564) internal successors, (539), 434 states have internal predecessors, (539), 40 states have call successors, (40), 29 states have call predecessors, (40), 35 states have return successors, (49), 41 states have call predecessors, (49), 36 states have call successors, (49) [2022-07-19 10:54:34,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 628 transitions. [2022-07-19 10:54:34,143 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 628 transitions. Word has length 60 [2022-07-19 10:54:34,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:34,143 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 628 transitions. [2022-07-19 10:54:34,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:54:34,144 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 628 transitions. [2022-07-19 10:54:34,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-19 10:54:34,145 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:34,145 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:34,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-07-19 10:54:34,145 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:34,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:34,145 INFO L85 PathProgramCache]: Analyzing trace with hash 175179390, now seen corresponding path program 1 times [2022-07-19 10:54:34,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:34,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626181630] [2022-07-19 10:54:34,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:34,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:34,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:34,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 10:54:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:34,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 10:54:34,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:34,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:54:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:34,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:34,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:34,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626181630] [2022-07-19 10:54:34,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626181630] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:34,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:34,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-19 10:54:34,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474282624] [2022-07-19 10:54:34,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:34,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 10:54:34,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:34,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 10:54:34,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-19 10:54:34,271 INFO L87 Difference]: Start difference. First operand 505 states and 628 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 8 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 10:54:35,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:35,054 INFO L93 Difference]: Finished difference Result 892 states and 1122 transitions. [2022-07-19 10:54:35,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 10:54:35,055 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 8 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 60 [2022-07-19 10:54:35,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:35,057 INFO L225 Difference]: With dead ends: 892 [2022-07-19 10:54:35,057 INFO L226 Difference]: Without dead ends: 787 [2022-07-19 10:54:35,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2022-07-19 10:54:35,058 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 545 mSDsluCounter, 2700 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 3260 SdHoareTripleChecker+Invalid, 1637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:35,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 3260 Invalid, 1637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1483 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 10:54:35,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-07-19 10:54:35,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 399. [2022-07-19 10:54:35,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 335 states have (on average 1.2686567164179106) internal successors, (425), 339 states have internal predecessors, (425), 35 states have call successors, (35), 25 states have call predecessors, (35), 28 states have return successors, (42), 34 states have call predecessors, (42), 32 states have call successors, (42) [2022-07-19 10:54:35,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 502 transitions. [2022-07-19 10:54:35,091 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 502 transitions. Word has length 60 [2022-07-19 10:54:35,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:35,092 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 502 transitions. [2022-07-19 10:54:35,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 8 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 10:54:35,092 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 502 transitions. [2022-07-19 10:54:35,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-19 10:54:35,093 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:35,093 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:35,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-07-19 10:54:35,093 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:35,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:35,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1562268864, now seen corresponding path program 1 times [2022-07-19 10:54:35,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:35,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958594309] [2022-07-19 10:54:35,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:35,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:35,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:35,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:54:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:35,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:54:35,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:35,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 10:54:35,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:35,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 10:54:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:35,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:35,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958594309] [2022-07-19 10:54:35,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958594309] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:35,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:35,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 10:54:35,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999802566] [2022-07-19 10:54:35,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:35,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 10:54:35,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:35,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 10:54:35,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-07-19 10:54:35,214 INFO L87 Difference]: Start difference. First operand 399 states and 502 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-19 10:54:35,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:35,917 INFO L93 Difference]: Finished difference Result 431 states and 540 transitions. [2022-07-19 10:54:35,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 10:54:35,918 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 62 [2022-07-19 10:54:35,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:35,919 INFO L225 Difference]: With dead ends: 431 [2022-07-19 10:54:35,919 INFO L226 Difference]: Without dead ends: 409 [2022-07-19 10:54:35,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-07-19 10:54:35,920 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 194 mSDsluCounter, 1992 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 2280 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:35,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 2280 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 10:54:35,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-07-19 10:54:35,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 397. [2022-07-19 10:54:35,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 333 states have (on average 1.2672672672672673) internal successors, (422), 337 states have internal predecessors, (422), 35 states have call successors, (35), 25 states have call predecessors, (35), 28 states have return successors, (42), 34 states have call predecessors, (42), 32 states have call successors, (42) [2022-07-19 10:54:35,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 499 transitions. [2022-07-19 10:54:35,962 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 499 transitions. Word has length 62 [2022-07-19 10:54:35,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:35,963 INFO L495 AbstractCegarLoop]: Abstraction has 397 states and 499 transitions. [2022-07-19 10:54:35,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 10 states have internal predecessors, (53), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-19 10:54:35,963 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 499 transitions. [2022-07-19 10:54:35,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-19 10:54:35,964 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:35,964 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:35,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-07-19 10:54:35,965 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:35,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:35,965 INFO L85 PathProgramCache]: Analyzing trace with hash 224602701, now seen corresponding path program 1 times [2022-07-19 10:54:35,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:35,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127045252] [2022-07-19 10:54:35,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:35,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:36,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 10:54:36,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:36,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 10:54:36,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:36,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 10:54:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:36,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 10:54:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:36,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-19 10:54:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:36,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:36,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:36,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127045252] [2022-07-19 10:54:36,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127045252] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:36,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:36,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-19 10:54:36,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983250066] [2022-07-19 10:54:36,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:36,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 10:54:36,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:36,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 10:54:36,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-07-19 10:54:36,104 INFO L87 Difference]: Start difference. First operand 397 states and 499 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 10:54:36,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:36,487 INFO L93 Difference]: Finished difference Result 594 states and 758 transitions. [2022-07-19 10:54:36,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:54:36,487 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 64 [2022-07-19 10:54:36,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:36,489 INFO L225 Difference]: With dead ends: 594 [2022-07-19 10:54:36,489 INFO L226 Difference]: Without dead ends: 402 [2022-07-19 10:54:36,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-07-19 10:54:36,490 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 236 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 1542 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:36,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 1542 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:54:36,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-07-19 10:54:36,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 390. [2022-07-19 10:54:36,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 326 states have (on average 1.2607361963190185) internal successors, (411), 330 states have internal predecessors, (411), 35 states have call successors, (35), 25 states have call predecessors, (35), 28 states have return successors, (42), 34 states have call predecessors, (42), 32 states have call successors, (42) [2022-07-19 10:54:36,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 488 transitions. [2022-07-19 10:54:36,540 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 488 transitions. Word has length 64 [2022-07-19 10:54:36,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:36,540 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 488 transitions. [2022-07-19 10:54:36,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 10:54:36,541 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 488 transitions. [2022-07-19 10:54:36,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-19 10:54:36,542 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:36,542 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:36,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-07-19 10:54:36,542 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:36,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:36,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1555287307, now seen corresponding path program 1 times [2022-07-19 10:54:36,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:36,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123333891] [2022-07-19 10:54:36,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:36,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:36,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:36,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:54:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:36,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 10:54:36,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:36,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-19 10:54:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:36,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 10:54:36,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:36,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:36,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:36,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123333891] [2022-07-19 10:54:36,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123333891] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:36,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:36,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 10:54:36,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942137711] [2022-07-19 10:54:36,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:36,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 10:54:36,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:36,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 10:54:36,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:54:36,602 INFO L87 Difference]: Start difference. First operand 390 states and 488 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 10:54:36,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:36,853 INFO L93 Difference]: Finished difference Result 423 states and 525 transitions. [2022-07-19 10:54:36,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:54:36,854 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 66 [2022-07-19 10:54:36,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:36,854 INFO L225 Difference]: With dead ends: 423 [2022-07-19 10:54:36,854 INFO L226 Difference]: Without dead ends: 373 [2022-07-19 10:54:36,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-19 10:54:36,855 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 121 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:36,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 1087 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:54:36,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-07-19 10:54:36,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 361. [2022-07-19 10:54:36,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 303 states have (on average 1.2640264026402641) internal successors, (383), 307 states have internal predecessors, (383), 30 states have call successors, (30), 24 states have call predecessors, (30), 27 states have return successors, (36), 29 states have call predecessors, (36), 27 states have call successors, (36) [2022-07-19 10:54:36,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 449 transitions. [2022-07-19 10:54:36,880 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 449 transitions. Word has length 66 [2022-07-19 10:54:36,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:36,880 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 449 transitions. [2022-07-19 10:54:36,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 10:54:36,881 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 449 transitions. [2022-07-19 10:54:36,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-19 10:54:36,881 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:36,881 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-07-19 10:54:36,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-07-19 10:54:36,882 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:36,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:36,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1823600415, now seen corresponding path program 1 times [2022-07-19 10:54:36,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:36,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584963050] [2022-07-19 10:54:36,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:36,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:36,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:36,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 10:54:36,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:36,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-19 10:54:36,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:36,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-19 10:54:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:36,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 10:54:36,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:36,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584963050] [2022-07-19 10:54:36,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584963050] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:54:36,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217552709] [2022-07-19 10:54:36,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:36,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:54:36,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:54:36,951 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) [2022-07-19 10:54:36,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 10:54:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:37,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 10:54:37,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:54:37,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:37,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:54:37,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217552709] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:37,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 10:54:37,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2022-07-19 10:54:37,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458409936] [2022-07-19 10:54:37,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:37,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:54:37,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:37,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:54:37,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:54:37,169 INFO L87 Difference]: Start difference. First operand 361 states and 449 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:54:37,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:37,249 INFO L93 Difference]: Finished difference Result 384 states and 471 transitions. [2022-07-19 10:54:37,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 10:54:37,250 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2022-07-19 10:54:37,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:37,251 INFO L225 Difference]: With dead ends: 384 [2022-07-19 10:54:37,251 INFO L226 Difference]: Without dead ends: 332 [2022-07-19 10:54:37,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:54:37,252 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 0 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:37,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 917 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:54:37,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-07-19 10:54:37,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2022-07-19 10:54:37,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 280 states have (on average 1.275) internal successors, (357), 283 states have internal predecessors, (357), 27 states have call successors, (27), 22 states have call predecessors, (27), 24 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2022-07-19 10:54:37,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 416 transitions. [2022-07-19 10:54:37,302 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 416 transitions. Word has length 62 [2022-07-19 10:54:37,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:37,302 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 416 transitions. [2022-07-19 10:54:37,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 10:54:37,303 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 416 transitions. [2022-07-19 10:54:37,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-19 10:54:37,304 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:37,304 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:37,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 10:54:37,527 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,SelfDestructingSolverStorable65 [2022-07-19 10:54:37,528 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:37,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:37,528 INFO L85 PathProgramCache]: Analyzing trace with hash 2069212948, now seen corresponding path program 1 times [2022-07-19 10:54:37,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:37,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810386966] [2022-07-19 10:54:37,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:37,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:37,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:37,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 10:54:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:37,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-19 10:54:37,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:37,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 10:54:37,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:37,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:37,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:37,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810386966] [2022-07-19 10:54:37,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810386966] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:37,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:37,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-19 10:54:37,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171627720] [2022-07-19 10:54:37,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:37,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 10:54:37,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:37,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 10:54:37,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-07-19 10:54:37,704 INFO L87 Difference]: Start difference. First operand 332 states and 416 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 10:54:38,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:38,300 INFO L93 Difference]: Finished difference Result 346 states and 433 transitions. [2022-07-19 10:54:38,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 10:54:38,301 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 64 [2022-07-19 10:54:38,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:38,302 INFO L225 Difference]: With dead ends: 346 [2022-07-19 10:54:38,302 INFO L226 Difference]: Without dead ends: 270 [2022-07-19 10:54:38,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-07-19 10:54:38,305 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 154 mSDsluCounter, 1488 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1699 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:38,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 1699 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 10:54:38,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-07-19 10:54:38,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 264. [2022-07-19 10:54:38,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 220 states have (on average 1.3) internal successors, (286), 222 states have internal predecessors, (286), 22 states have call successors, (22), 19 states have call predecessors, (22), 21 states have return successors, (28), 22 states have call predecessors, (28), 20 states have call successors, (28) [2022-07-19 10:54:38,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 336 transitions. [2022-07-19 10:54:38,333 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 336 transitions. Word has length 64 [2022-07-19 10:54:38,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:38,333 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 336 transitions. [2022-07-19 10:54:38,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 10:54:38,333 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 336 transitions. [2022-07-19 10:54:38,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-19 10:54:38,335 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:38,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:38,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-07-19 10:54:38,335 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:38,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:38,335 INFO L85 PathProgramCache]: Analyzing trace with hash 585691284, now seen corresponding path program 1 times [2022-07-19 10:54:38,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:38,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338671210] [2022-07-19 10:54:38,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:38,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:38,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:38,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 10:54:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:38,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 10:54:38,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:38,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 10:54:38,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:38,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 10:54:38,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:38,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 10:54:38,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:38,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-19 10:54:38,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:38,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:38,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:38,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338671210] [2022-07-19 10:54:38,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338671210] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:38,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:38,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-19 10:54:38,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654458744] [2022-07-19 10:54:38,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:38,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 10:54:38,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:38,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 10:54:38,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-07-19 10:54:38,445 INFO L87 Difference]: Start difference. First operand 264 states and 336 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 6 states have internal predecessors, (54), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-19 10:54:38,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:38,733 INFO L93 Difference]: Finished difference Result 455 states and 585 transitions. [2022-07-19 10:54:38,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 10:54:38,733 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 6 states have internal predecessors, (54), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 68 [2022-07-19 10:54:38,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:38,741 INFO L225 Difference]: With dead ends: 455 [2022-07-19 10:54:38,742 INFO L226 Difference]: Without dead ends: 270 [2022-07-19 10:54:38,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-07-19 10:54:38,743 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 218 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:38,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 730 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:54:38,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-07-19 10:54:38,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 264. [2022-07-19 10:54:38,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 220 states have (on average 1.2954545454545454) internal successors, (285), 222 states have internal predecessors, (285), 22 states have call successors, (22), 19 states have call predecessors, (22), 21 states have return successors, (28), 22 states have call predecessors, (28), 20 states have call successors, (28) [2022-07-19 10:54:38,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 335 transitions. [2022-07-19 10:54:38,772 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 335 transitions. Word has length 68 [2022-07-19 10:54:38,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:38,772 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 335 transitions. [2022-07-19 10:54:38,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 6 states have internal predecessors, (54), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-19 10:54:38,773 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 335 transitions. [2022-07-19 10:54:38,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-19 10:54:38,773 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:38,774 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:38,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-07-19 10:54:38,774 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:38,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:38,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1800918031, now seen corresponding path program 1 times [2022-07-19 10:54:38,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:38,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340080163] [2022-07-19 10:54:38,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:38,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:38,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 10:54:38,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:38,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 10:54:38,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:38,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 10:54:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:38,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 10:54:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:38,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 10:54:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:38,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-19 10:54:38,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:38,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:38,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:38,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340080163] [2022-07-19 10:54:38,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340080163] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:38,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:38,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 10:54:38,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701575955] [2022-07-19 10:54:38,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:38,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 10:54:38,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:38,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 10:54:38,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:54:38,861 INFO L87 Difference]: Start difference. First operand 264 states and 335 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 10:54:39,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:39,071 INFO L93 Difference]: Finished difference Result 343 states and 431 transitions. [2022-07-19 10:54:39,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 10:54:39,072 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2022-07-19 10:54:39,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:39,073 INFO L225 Difference]: With dead ends: 343 [2022-07-19 10:54:39,073 INFO L226 Difference]: Without dead ends: 216 [2022-07-19 10:54:39,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-07-19 10:54:39,074 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 97 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:39,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 748 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:54:39,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-07-19 10:54:39,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 175. [2022-07-19 10:54:39,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 145 states have (on average 1.2344827586206897) internal successors, (179), 146 states have internal predecessors, (179), 15 states have call successors, (15), 13 states have call predecessors, (15), 14 states have return successors, (17), 15 states have call predecessors, (17), 14 states have call successors, (17) [2022-07-19 10:54:39,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2022-07-19 10:54:39,093 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 70 [2022-07-19 10:54:39,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:39,093 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2022-07-19 10:54:39,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 10:54:39,093 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2022-07-19 10:54:39,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-19 10:54:39,094 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:39,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:39,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-07-19 10:54:39,095 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:39,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:39,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1069664757, now seen corresponding path program 1 times [2022-07-19 10:54:39,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:39,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587285248] [2022-07-19 10:54:39,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:39,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:39,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 10:54:39,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:39,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 10:54:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:39,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 10:54:39,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:39,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 10:54:39,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:39,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 10:54:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:39,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-19 10:54:39,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:39,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-19 10:54:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:39,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:39,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:39,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587285248] [2022-07-19 10:54:39,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587285248] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:39,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:39,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-19 10:54:39,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304654570] [2022-07-19 10:54:39,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:39,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 10:54:39,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:39,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 10:54:39,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-19 10:54:39,187 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 10:54:39,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:39,423 INFO L93 Difference]: Finished difference Result 224 states and 267 transitions. [2022-07-19 10:54:39,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 10:54:39,423 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 84 [2022-07-19 10:54:39,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:39,424 INFO L225 Difference]: With dead ends: 224 [2022-07-19 10:54:39,424 INFO L226 Difference]: Without dead ends: 185 [2022-07-19 10:54:39,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-07-19 10:54:39,425 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 219 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:39,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 814 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:54:39,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-19 10:54:39,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 173. [2022-07-19 10:54:39,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 143 states have (on average 1.2027972027972027) internal successors, (172), 144 states have internal predecessors, (172), 15 states have call successors, (15), 13 states have call predecessors, (15), 14 states have return successors, (17), 15 states have call predecessors, (17), 14 states have call successors, (17) [2022-07-19 10:54:39,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 204 transitions. [2022-07-19 10:54:39,445 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 204 transitions. Word has length 84 [2022-07-19 10:54:39,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:39,446 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 204 transitions. [2022-07-19 10:54:39,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 10:54:39,446 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 204 transitions. [2022-07-19 10:54:39,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-19 10:54:39,447 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:39,447 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:39,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-07-19 10:54:39,447 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:39,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:39,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1463540250, now seen corresponding path program 1 times [2022-07-19 10:54:39,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:39,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60590203] [2022-07-19 10:54:39,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:39,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:39,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:39,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 10:54:39,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:39,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 10:54:39,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:39,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 10:54:39,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:39,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 10:54:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:39,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 10:54:39,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:39,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-19 10:54:39,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:39,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-19 10:54:39,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:54:39,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:39,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60590203] [2022-07-19 10:54:39,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60590203] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:39,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:39,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-19 10:54:39,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591542615] [2022-07-19 10:54:39,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:39,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 10:54:39,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:39,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 10:54:39,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-19 10:54:39,542 INFO L87 Difference]: Start difference. First operand 173 states and 204 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 10:54:39,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:39,773 INFO L93 Difference]: Finished difference Result 201 states and 234 transitions. [2022-07-19 10:54:39,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 10:54:39,774 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 86 [2022-07-19 10:54:39,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:39,774 INFO L225 Difference]: With dead ends: 201 [2022-07-19 10:54:39,774 INFO L226 Difference]: Without dead ends: 153 [2022-07-19 10:54:39,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-07-19 10:54:39,775 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 136 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:39,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 952 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:54:39,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-19 10:54:39,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 141. [2022-07-19 10:54:39,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 117 states have internal predecessors, (135), 12 states have call successors, (12), 11 states have call predecessors, (12), 12 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2022-07-19 10:54:39,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 160 transitions. [2022-07-19 10:54:39,786 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 160 transitions. Word has length 86 [2022-07-19 10:54:39,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:39,786 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 160 transitions. [2022-07-19 10:54:39,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 10:54:39,787 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 160 transitions. [2022-07-19 10:54:39,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-19 10:54:39,787 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:39,787 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:39,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-07-19 10:54:39,787 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:39,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:39,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1416419599, now seen corresponding path program 1 times [2022-07-19 10:54:39,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:39,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037127241] [2022-07-19 10:54:39,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:39,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:39,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:39,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 10:54:39,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:39,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 10:54:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:39,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 10:54:39,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:39,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 10:54:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:39,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 10:54:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:39,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 10:54:39,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:39,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-19 10:54:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:39,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-19 10:54:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:39,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 10:54:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:39,877 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 10:54:39,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:39,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037127241] [2022-07-19 10:54:39,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037127241] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:54:39,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979988658] [2022-07-19 10:54:39,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:39,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:54:39,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:54:39,880 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) [2022-07-19 10:54:39,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 10:54:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:40,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 10:54:40,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:54:40,061 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 10:54:40,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:54:40,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979988658] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:40,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 10:54:40,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2022-07-19 10:54:40,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364434346] [2022-07-19 10:54:40,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:40,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:54:40,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:40,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:54:40,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-07-19 10:54:40,063 INFO L87 Difference]: Start difference. First operand 141 states and 160 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-19 10:54:40,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:40,081 INFO L93 Difference]: Finished difference Result 205 states and 238 transitions. [2022-07-19 10:54:40,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:54:40,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 103 [2022-07-19 10:54:40,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:40,082 INFO L225 Difference]: With dead ends: 205 [2022-07-19 10:54:40,082 INFO L226 Difference]: Without dead ends: 170 [2022-07-19 10:54:40,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-07-19 10:54:40,083 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 16 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:40,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 236 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:54:40,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-19 10:54:40,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 151. [2022-07-19 10:54:40,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 125 states have (on average 1.152) internal successors, (144), 125 states have internal predecessors, (144), 13 states have call successors, (13), 11 states have call predecessors, (13), 12 states have return successors, (15), 14 states have call predecessors, (15), 12 states have call successors, (15) [2022-07-19 10:54:40,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 172 transitions. [2022-07-19 10:54:40,095 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 172 transitions. Word has length 103 [2022-07-19 10:54:40,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:40,096 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 172 transitions. [2022-07-19 10:54:40,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-19 10:54:40,096 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 172 transitions. [2022-07-19 10:54:40,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-19 10:54:40,096 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:40,096 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:40,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 10:54:40,297 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,SelfDestructingSolverStorable71 [2022-07-19 10:54:40,297 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:40,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:40,298 INFO L85 PathProgramCache]: Analyzing trace with hash -479392400, now seen corresponding path program 1 times [2022-07-19 10:54:40,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:40,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325478281] [2022-07-19 10:54:40,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:40,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:40,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:40,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 10:54:40,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:40,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 10:54:40,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:40,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 10:54:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:40,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 10:54:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:40,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 10:54:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:40,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 10:54:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:40,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-19 10:54:40,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:40,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-19 10:54:40,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:40,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 10:54:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:40,397 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 10:54:40,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:40,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325478281] [2022-07-19 10:54:40,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325478281] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:54:40,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494498605] [2022-07-19 10:54:40,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:40,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:54:40,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:54:40,399 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) [2022-07-19 10:54:40,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 10:54:40,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:40,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 10:54:40,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:54:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 10:54:40,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:54:40,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494498605] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:40,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 10:54:40,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2022-07-19 10:54:40,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126338504] [2022-07-19 10:54:40,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:40,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:54:40,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:40,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:54:40,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-07-19 10:54:40,598 INFO L87 Difference]: Start difference. First operand 151 states and 172 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-19 10:54:40,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:40,628 INFO L93 Difference]: Finished difference Result 203 states and 228 transitions. [2022-07-19 10:54:40,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:54:40,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 103 [2022-07-19 10:54:40,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:40,629 INFO L225 Difference]: With dead ends: 203 [2022-07-19 10:54:40,629 INFO L226 Difference]: Without dead ends: 170 [2022-07-19 10:54:40,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-07-19 10:54:40,630 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 21 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:40,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 255 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:54:40,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-19 10:54:40,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 151. [2022-07-19 10:54:40,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 125 states have (on average 1.12) internal successors, (140), 125 states have internal predecessors, (140), 13 states have call successors, (13), 11 states have call predecessors, (13), 12 states have return successors, (15), 14 states have call predecessors, (15), 12 states have call successors, (15) [2022-07-19 10:54:40,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 168 transitions. [2022-07-19 10:54:40,650 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 168 transitions. Word has length 103 [2022-07-19 10:54:40,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:40,650 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 168 transitions. [2022-07-19 10:54:40,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-19 10:54:40,651 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 168 transitions. [2022-07-19 10:54:40,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-19 10:54:40,651 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:40,652 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:40,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 10:54:40,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:54:40,874 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:40,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:40,875 INFO L85 PathProgramCache]: Analyzing trace with hash 506808435, now seen corresponding path program 1 times [2022-07-19 10:54:40,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:40,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005333988] [2022-07-19 10:54:40,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:40,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:40,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:40,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 10:54:40,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:40,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 10:54:40,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:40,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 10:54:40,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:40,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 10:54:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:40,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 10:54:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:40,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 10:54:40,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:40,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-19 10:54:40,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:40,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-19 10:54:40,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:40,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 10:54:40,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:40,968 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 10:54:40,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:40,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005333988] [2022-07-19 10:54:40,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005333988] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:54:40,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310460193] [2022-07-19 10:54:40,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:40,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:54:40,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:54:40,971 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) [2022-07-19 10:54:40,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 10:54:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:41,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 10:54:41,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:54:41,194 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 10:54:41,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 10:54:41,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310460193] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:41,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 10:54:41,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-07-19 10:54:41,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532767171] [2022-07-19 10:54:41,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:41,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:54:41,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:41,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:54:41,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-19 10:54:41,197 INFO L87 Difference]: Start difference. First operand 151 states and 168 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-19 10:54:41,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:41,296 INFO L93 Difference]: Finished difference Result 283 states and 318 transitions. [2022-07-19 10:54:41,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:54:41,296 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 103 [2022-07-19 10:54:41,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:41,297 INFO L225 Difference]: With dead ends: 283 [2022-07-19 10:54:41,297 INFO L226 Difference]: Without dead ends: 151 [2022-07-19 10:54:41,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-07-19 10:54:41,298 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 144 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:41,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 214 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:54:41,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-19 10:54:41,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-07-19 10:54:41,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 125 states have (on average 1.104) internal successors, (138), 125 states have internal predecessors, (138), 13 states have call successors, (13), 11 states have call predecessors, (13), 12 states have return successors, (15), 14 states have call predecessors, (15), 12 states have call successors, (15) [2022-07-19 10:54:41,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 166 transitions. [2022-07-19 10:54:41,321 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 166 transitions. Word has length 103 [2022-07-19 10:54:41,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:41,321 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 166 transitions. [2022-07-19 10:54:41,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-19 10:54:41,322 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 166 transitions. [2022-07-19 10:54:41,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-19 10:54:41,322 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:41,322 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:41,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 10:54:41,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:54:41,523 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:41,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:41,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1772033550, now seen corresponding path program 1 times [2022-07-19 10:54:41,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:41,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096535645] [2022-07-19 10:54:41,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:41,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:41,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:41,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 10:54:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:41,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 10:54:41,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:41,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 10:54:41,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:41,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 10:54:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:41,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 10:54:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:41,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 10:54:41,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:41,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-19 10:54:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:41,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:54:41,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:41,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-19 10:54:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:41,646 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 10:54:41,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:41,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096535645] [2022-07-19 10:54:41,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096535645] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:41,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:41,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-19 10:54:41,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485974042] [2022-07-19 10:54:41,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:41,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 10:54:41,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:41,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 10:54:41,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-19 10:54:41,649 INFO L87 Difference]: Start difference. First operand 151 states and 166 transitions. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 6 states have internal predecessors, (78), 3 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-19 10:54:41,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:41,931 INFO L93 Difference]: Finished difference Result 300 states and 328 transitions. [2022-07-19 10:54:41,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 10:54:41,932 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 6 states have internal predecessors, (78), 3 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 104 [2022-07-19 10:54:41,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:41,932 INFO L225 Difference]: With dead ends: 300 [2022-07-19 10:54:41,932 INFO L226 Difference]: Without dead ends: 151 [2022-07-19 10:54:41,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-07-19 10:54:41,933 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 167 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:41,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 639 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:54:41,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-19 10:54:41,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-07-19 10:54:41,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 125 states have (on average 1.096) internal successors, (137), 125 states have internal predecessors, (137), 13 states have call successors, (13), 11 states have call predecessors, (13), 12 states have return successors, (15), 14 states have call predecessors, (15), 12 states have call successors, (15) [2022-07-19 10:54:41,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 165 transitions. [2022-07-19 10:54:41,946 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 165 transitions. Word has length 104 [2022-07-19 10:54:41,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:41,946 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 165 transitions. [2022-07-19 10:54:41,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 6 states have internal predecessors, (78), 3 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-19 10:54:41,946 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 165 transitions. [2022-07-19 10:54:41,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-19 10:54:41,947 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:54:41,947 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:54:41,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-07-19 10:54:41,947 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:54:41,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:54:41,948 INFO L85 PathProgramCache]: Analyzing trace with hash 125463216, now seen corresponding path program 1 times [2022-07-19 10:54:41,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:54:41,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348852062] [2022-07-19 10:54:41,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:54:41,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:54:41,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:42,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 10:54:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:42,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 10:54:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:42,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 10:54:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:42,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 10:54:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:42,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 10:54:42,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:42,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 10:54:42,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:42,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-19 10:54:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:42,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-19 10:54:42,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:42,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-19 10:54:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:54:42,098 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 10:54:42,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:54:42,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348852062] [2022-07-19 10:54:42,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348852062] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:54:42,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:54:42,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 10:54:42,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610320769] [2022-07-19 10:54:42,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:54:42,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 10:54:42,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:54:42,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 10:54:42,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-07-19 10:54:42,101 INFO L87 Difference]: Start difference. First operand 151 states and 165 transitions. Second operand has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 8 states have internal predecessors, (78), 4 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-19 10:54:42,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:54:42,373 INFO L93 Difference]: Finished difference Result 151 states and 165 transitions. [2022-07-19 10:54:42,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 10:54:42,374 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 8 states have internal predecessors, (78), 4 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 104 [2022-07-19 10:54:42,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:54:42,374 INFO L225 Difference]: With dead ends: 151 [2022-07-19 10:54:42,374 INFO L226 Difference]: Without dead ends: 0 [2022-07-19 10:54:42,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-07-19 10:54:42,375 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 190 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:54:42,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 548 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 10:54:42,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-19 10:54:42,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-19 10:54:42,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:54:42,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-19 10:54:42,376 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 104 [2022-07-19 10:54:42,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:54:42,377 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-19 10:54:42,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 8 states have internal predecessors, (78), 4 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-19 10:54:42,377 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-19 10:54:42,377 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-19 10:54:42,380 INFO L805 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-19 10:54:42,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-07-19 10:54:42,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.