./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ntdrivers-simplified/cdaudio_simpl1.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bfc29f03d3be9b41eb07ac14f0f7eac45bf3a60a4a6601e3132f720b72534d53 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 10:18:59,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 10:18:59,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 10:18:59,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 10:18:59,965 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 10:18:59,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 10:18:59,968 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 10:18:59,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 10:18:59,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 10:18:59,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 10:18:59,974 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 10:18:59,976 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 10:18:59,976 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 10:18:59,978 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 10:18:59,980 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 10:18:59,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 10:18:59,982 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 10:18:59,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 10:18:59,988 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 10:18:59,991 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 10:18:59,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 10:18:59,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 10:18:59,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 10:18:59,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 10:18:59,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 10:18:59,996 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 10:18:59,996 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 10:18:59,996 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 10:18:59,997 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 10:18:59,997 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 10:18:59,998 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 10:18:59,998 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 10:18:59,999 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 10:18:59,999 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 10:19:00,000 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 10:19:00,000 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 10:19:00,001 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 10:19:00,001 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 10:19:00,001 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 10:19:00,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 10:19:00,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 10:19:00,006 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 10:19:00,036 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 10:19:00,037 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 10:19:00,037 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 10:19:00,037 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 10:19:00,038 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 10:19:00,038 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 10:19:00,038 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 10:19:00,039 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 10:19:00,039 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 10:19:00,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 10:19:00,040 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 10:19:00,040 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 10:19:00,040 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 10:19:00,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 10:19:00,041 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 10:19:00,041 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 10:19:00,041 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 10:19:00,041 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 10:19:00,041 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 10:19:00,041 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 10:19:00,041 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 10:19:00,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 10:19:00,042 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 10:19:00,042 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 10:19:00,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:19:00,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 10:19:00,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 10:19:00,043 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 10:19:00,044 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 10:19:00,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 10:19:00,044 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 10:19:00,044 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 10:19:00,044 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 10:19:00,044 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 10:19:00,045 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bfc29f03d3be9b41eb07ac14f0f7eac45bf3a60a4a6601e3132f720b72534d53 [2021-12-21 10:19:00,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 10:19:00,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 10:19:00,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 10:19:00,275 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 10:19:00,275 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 10:19:00,276 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers-simplified/cdaudio_simpl1.cil-1.c [2021-12-21 10:19:00,320 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48add4394/c8c8ad56fce64e6ebd11552d61a78c85/FLAG037b05a77 [2021-12-21 10:19:00,778 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 10:19:00,786 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers-simplified/cdaudio_simpl1.cil-1.c [2021-12-21 10:19:00,811 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48add4394/c8c8ad56fce64e6ebd11552d61a78c85/FLAG037b05a77 [2021-12-21 10:19:00,821 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48add4394/c8c8ad56fce64e6ebd11552d61a78c85 [2021-12-21 10:19:00,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 10:19:00,826 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 10:19:00,828 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 10:19:00,828 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 10:19:00,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 10:19:00,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:19:00" (1/1) ... [2021-12-21 10:19:00,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d9ec306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:00, skipping insertion in model container [2021-12-21 10:19:00,832 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:19:00" (1/1) ... [2021-12-21 10:19:00,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 10:19:00,882 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 10:19:01,044 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-1.c[2074,2087] [2021-12-21 10:19:01,175 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:19:01,188 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 10:19:01,197 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-1.c[2074,2087] [2021-12-21 10:19:01,270 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:19:01,281 INFO L208 MainTranslator]: Completed translation [2021-12-21 10:19:01,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:01 WrapperNode [2021-12-21 10:19:01,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 10:19:01,282 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 10:19:01,283 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 10:19:01,283 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 10:19:01,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:01" (1/1) ... [2021-12-21 10:19:01,308 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:01" (1/1) ... [2021-12-21 10:19:01,363 INFO L137 Inliner]: procedures = 41, calls = 108, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 1583 [2021-12-21 10:19:01,366 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 10:19:01,367 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 10:19:01,367 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 10:19:01,367 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 10:19:01,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:01" (1/1) ... [2021-12-21 10:19:01,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:01" (1/1) ... [2021-12-21 10:19:01,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:01" (1/1) ... [2021-12-21 10:19:01,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:01" (1/1) ... [2021-12-21 10:19:01,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:01" (1/1) ... [2021-12-21 10:19:01,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:01" (1/1) ... [2021-12-21 10:19:01,419 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:01" (1/1) ... [2021-12-21 10:19:01,425 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 10:19:01,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 10:19:01,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 10:19:01,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 10:19:01,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:01" (1/1) ... [2021-12-21 10:19:01,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:19:01,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:19:01,482 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 10:19:01,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 10:19:01,508 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2021-12-21 10:19:01,508 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2021-12-21 10:19:01,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 10:19:01,508 INFO L130 BoogieDeclarations]: Found specification of procedure AG_SetStatusAndReturn [2021-12-21 10:19:01,508 INFO L138 BoogieDeclarations]: Found implementation of procedure AG_SetStatusAndReturn [2021-12-21 10:19:01,509 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2021-12-21 10:19:01,509 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2021-12-21 10:19:01,510 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2021-12-21 10:19:01,510 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2021-12-21 10:19:01,510 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2021-12-21 10:19:01,510 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2021-12-21 10:19:01,510 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2021-12-21 10:19:01,510 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2021-12-21 10:19:01,510 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2021-12-21 10:19:01,510 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2021-12-21 10:19:01,511 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2021-12-21 10:19:01,511 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2021-12-21 10:19:01,511 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2021-12-21 10:19:01,511 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2021-12-21 10:19:01,511 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2021-12-21 10:19:01,511 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2021-12-21 10:19:01,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 10:19:01,511 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2021-12-21 10:19:01,511 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2021-12-21 10:19:01,512 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2021-12-21 10:19:01,512 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2021-12-21 10:19:01,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 10:19:01,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 10:19:01,512 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2021-12-21 10:19:01,512 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2021-12-21 10:19:01,738 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 10:19:01,740 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 10:19:01,843 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:19:01,891 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2021-12-21 10:19:01,891 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2021-12-21 10:19:01,945 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:19:01,963 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2021-12-21 10:19:01,963 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2021-12-21 10:19:01,980 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:19:01,981 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:19:01,983 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:19:01,988 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:19:01,995 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:19:02,005 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:19:02,008 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:19:02,447 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L305: CdAudioPnp_#res#1 := 0; [2021-12-21 10:19:02,448 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##258: assume !false; [2021-12-21 10:19:02,448 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##257: assume false; [2021-12-21 10:19:02,448 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##286: assume !false; [2021-12-21 10:19:02,448 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##285: assume false; [2021-12-21 10:19:02,448 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume !false; [2021-12-21 10:19:02,448 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##46: assume false; [2021-12-21 10:19:02,449 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##133: assume false; [2021-12-21 10:19:02,449 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##134: assume !false; [2021-12-21 10:19:02,449 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##25: assume !false; [2021-12-21 10:19:02,449 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume false; [2021-12-21 10:19:02,449 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2021-12-21 10:19:02,449 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2021-12-21 10:19:02,449 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##331: assume false; [2021-12-21 10:19:02,450 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##332: assume !false; [2021-12-21 10:19:02,505 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 10:19:02,517 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 10:19:02,518 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 10:19:02,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:19:02 BoogieIcfgContainer [2021-12-21 10:19:02,520 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 10:19:02,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 10:19:02,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 10:19:02,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 10:19:02,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:19:00" (1/3) ... [2021-12-21 10:19:02,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73e893fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:19:02, skipping insertion in model container [2021-12-21 10:19:02,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:01" (2/3) ... [2021-12-21 10:19:02,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73e893fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:19:02, skipping insertion in model container [2021-12-21 10:19:02,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:19:02" (3/3) ... [2021-12-21 10:19:02,526 INFO L111 eAbstractionObserver]: Analyzing ICFG cdaudio_simpl1.cil-1.c [2021-12-21 10:19:02,529 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 10:19:02,529 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 10:19:02,558 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 10:19:02,562 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 10:19:02,562 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 10:19:02,584 INFO L276 IsEmpty]: Start isEmpty. Operand has 470 states, 368 states have (on average 1.5081521739130435) internal successors, (555), 387 states have internal predecessors, (555), 87 states have call successors, (87), 13 states have call predecessors, (87), 13 states have return successors, (87), 82 states have call predecessors, (87), 87 states have call successors, (87) [2021-12-21 10:19:02,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 10:19:02,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:02,588 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:02,588 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:02,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:02,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1469618458, now seen corresponding path program 1 times [2021-12-21 10:19:02,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:02,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690270232] [2021-12-21 10:19:02,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:02,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:02,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:02,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:02,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690270232] [2021-12-21 10:19:02,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690270232] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:02,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:02,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:19:02,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574375672] [2021-12-21 10:19:02,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:02,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:19:02,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:02,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:19:02,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:02,742 INFO L87 Difference]: Start difference. First operand has 470 states, 368 states have (on average 1.5081521739130435) internal successors, (555), 387 states have internal predecessors, (555), 87 states have call successors, (87), 13 states have call predecessors, (87), 13 states have return successors, (87), 82 states have call predecessors, (87), 87 states have call successors, (87) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:02,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:02,871 INFO L93 Difference]: Finished difference Result 813 states and 1302 transitions. [2021-12-21 10:19:02,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:19:02,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-21 10:19:02,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:02,889 INFO L225 Difference]: With dead ends: 813 [2021-12-21 10:19:02,889 INFO L226 Difference]: Without dead ends: 463 [2021-12-21 10:19:02,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:02,895 INFO L933 BasicCegarLoop]: 703 mSDtfsCounter, 8 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1357 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:02,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 1357 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:19:02,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-12-21 10:19:02,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 463. [2021-12-21 10:19:02,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 363 states have (on average 1.4765840220385675) internal successors, (536), 380 states have internal predecessors, (536), 87 states have call successors, (87), 13 states have call predecessors, (87), 12 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2021-12-21 10:19:02,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 694 transitions. [2021-12-21 10:19:02,966 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 694 transitions. Word has length 13 [2021-12-21 10:19:02,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:02,966 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 694 transitions. [2021-12-21 10:19:02,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:02,966 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 694 transitions. [2021-12-21 10:19:02,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-21 10:19:02,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:02,978 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:02,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 10:19:02,979 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:02,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:02,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1712839840, now seen corresponding path program 1 times [2021-12-21 10:19:02,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:02,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360386308] [2021-12-21 10:19:02,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:02,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:03,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:03,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360386308] [2021-12-21 10:19:03,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360386308] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:03,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:03,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:19:03,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256440946] [2021-12-21 10:19:03,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:03,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:19:03,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:03,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:19:03,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:03,044 INFO L87 Difference]: Start difference. First operand 463 states and 694 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:03,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:03,165 INFO L93 Difference]: Finished difference Result 708 states and 1039 transitions. [2021-12-21 10:19:03,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:19:03,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-21 10:19:03,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:03,170 INFO L225 Difference]: With dead ends: 708 [2021-12-21 10:19:03,170 INFO L226 Difference]: Without dead ends: 601 [2021-12-21 10:19:03,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:03,171 INFO L933 BasicCegarLoop]: 820 mSDtfsCounter, 569 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 1047 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 [2021-12-21 10:19:03,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [569 Valid, 1047 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:03,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-12-21 10:19:03,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 581. [2021-12-21 10:19:03,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 467 states have (on average 1.436830835117773) internal successors, (671), 470 states have internal predecessors, (671), 93 states have call successors, (93), 21 states have call predecessors, (93), 20 states have return successors, (97), 91 states have call predecessors, (97), 81 states have call successors, (97) [2021-12-21 10:19:03,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 861 transitions. [2021-12-21 10:19:03,204 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 861 transitions. Word has length 15 [2021-12-21 10:19:03,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:03,204 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 861 transitions. [2021-12-21 10:19:03,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:03,206 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 861 transitions. [2021-12-21 10:19:03,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-21 10:19:03,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:03,209 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:03,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 10:19:03,209 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:03,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:03,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1900703522, now seen corresponding path program 1 times [2021-12-21 10:19:03,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:03,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500633877] [2021-12-21 10:19:03,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:03,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:03,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:03,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500633877] [2021-12-21 10:19:03,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500633877] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:03,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:03,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:19:03,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031239648] [2021-12-21 10:19:03,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:03,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:19:03,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:03,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:19:03,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:03,283 INFO L87 Difference]: Start difference. First operand 581 states and 861 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) [2021-12-21 10:19:03,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:03,311 INFO L93 Difference]: Finished difference Result 864 states and 1250 transitions. [2021-12-21 10:19:03,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:19:03,312 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 [2021-12-21 10:19:03,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:03,315 INFO L225 Difference]: With dead ends: 864 [2021-12-21 10:19:03,316 INFO L226 Difference]: Without dead ends: 727 [2021-12-21 10:19:03,316 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:03,317 INFO L933 BasicCegarLoop]: 684 mSDtfsCounter, 608 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:03,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 874 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:19:03,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-12-21 10:19:03,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 689. [2021-12-21 10:19:03,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 565 states have (on average 1.4336283185840708) internal successors, (810), 564 states have internal predecessors, (810), 94 states have call successors, (94), 26 states have call predecessors, (94), 29 states have return successors, (110), 98 states have call predecessors, (110), 85 states have call successors, (110) [2021-12-21 10:19:03,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1014 transitions. [2021-12-21 10:19:03,352 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1014 transitions. Word has length 19 [2021-12-21 10:19:03,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:03,352 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 1014 transitions. [2021-12-21 10:19:03,352 INFO L471 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) [2021-12-21 10:19:03,352 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1014 transitions. [2021-12-21 10:19:03,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-21 10:19:03,353 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:03,353 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:03,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 10:19:03,353 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:03,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:03,354 INFO L85 PathProgramCache]: Analyzing trace with hash 2011147442, now seen corresponding path program 1 times [2021-12-21 10:19:03,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:03,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174999925] [2021-12-21 10:19:03,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:03,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:03,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:03,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:03,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:03,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174999925] [2021-12-21 10:19:03,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174999925] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:03,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:03,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:19:03,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484240049] [2021-12-21 10:19:03,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:03,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:19:03,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:03,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:19:03,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:03,394 INFO L87 Difference]: Start difference. First operand 689 states and 1014 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) [2021-12-21 10:19:03,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:03,520 INFO L93 Difference]: Finished difference Result 1296 states and 1967 transitions. [2021-12-21 10:19:03,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:19:03,521 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 [2021-12-21 10:19:03,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:03,528 INFO L225 Difference]: With dead ends: 1296 [2021-12-21 10:19:03,528 INFO L226 Difference]: Without dead ends: 1061 [2021-12-21 10:19:03,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:03,542 INFO L933 BasicCegarLoop]: 1012 mSDtfsCounter, 341 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 1631 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 [2021-12-21 10:19:03,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 1631 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:03,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2021-12-21 10:19:03,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 821. [2021-12-21 10:19:03,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 674 states have (on average 1.4347181008902077) internal successors, (967), 672 states have internal predecessors, (967), 107 states have call successors, (107), 34 states have call predecessors, (107), 39 states have return successors, (172), 114 states have call predecessors, (172), 98 states have call successors, (172) [2021-12-21 10:19:03,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1246 transitions. [2021-12-21 10:19:03,579 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1246 transitions. Word has length 21 [2021-12-21 10:19:03,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:03,579 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 1246 transitions. [2021-12-21 10:19:03,580 INFO L471 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) [2021-12-21 10:19:03,580 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1246 transitions. [2021-12-21 10:19:03,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-21 10:19:03,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:03,580 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:03,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 10:19:03,581 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:03,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:03,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1977476652, now seen corresponding path program 1 times [2021-12-21 10:19:03,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:03,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289260880] [2021-12-21 10:19:03,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:03,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:03,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:03,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:03,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289260880] [2021-12-21 10:19:03,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289260880] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:03,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:03,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:19:03,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196112061] [2021-12-21 10:19:03,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:03,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:19:03,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:03,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:19:03,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:19:03,654 INFO L87 Difference]: Start difference. First operand 821 states and 1246 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) [2021-12-21 10:19:03,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:03,971 INFO L93 Difference]: Finished difference Result 1378 states and 2097 transitions. [2021-12-21 10:19:03,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:19:03,972 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 [2021-12-21 10:19:03,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:03,975 INFO L225 Difference]: With dead ends: 1378 [2021-12-21 10:19:03,975 INFO L226 Difference]: Without dead ends: 833 [2021-12-21 10:19:03,977 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:03,979 INFO L933 BasicCegarLoop]: 718 mSDtfsCounter, 1037 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1038 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:03,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1038 Valid, 872 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:19:03,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2021-12-21 10:19:04,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 809. [2021-12-21 10:19:04,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 664 states have (on average 1.4292168674698795) internal successors, (949), 662 states have internal predecessors, (949), 105 states have call successors, (105), 32 states have call predecessors, (105), 39 states have return successors, (168), 114 states have call predecessors, (168), 96 states have call successors, (168) [2021-12-21 10:19:04,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 1222 transitions. [2021-12-21 10:19:04,012 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 1222 transitions. Word has length 22 [2021-12-21 10:19:04,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:04,012 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 1222 transitions. [2021-12-21 10:19:04,012 INFO L471 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) [2021-12-21 10:19:04,012 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 1222 transitions. [2021-12-21 10:19:04,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-21 10:19:04,013 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:04,014 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:04,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 10:19:04,014 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:04,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:04,014 INFO L85 PathProgramCache]: Analyzing trace with hash -401986458, now seen corresponding path program 1 times [2021-12-21 10:19:04,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:04,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058088900] [2021-12-21 10:19:04,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:04,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:04,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:04,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:04,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:04,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058088900] [2021-12-21 10:19:04,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058088900] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:04,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:04,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:19:04,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532802242] [2021-12-21 10:19:04,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:04,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:19:04,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:04,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:19:04,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:04,059 INFO L87 Difference]: Start difference. First operand 809 states and 1222 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) [2021-12-21 10:19:04,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:04,106 INFO L93 Difference]: Finished difference Result 812 states and 1224 transitions. [2021-12-21 10:19:04,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:19:04,106 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 [2021-12-21 10:19:04,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:04,110 INFO L225 Difference]: With dead ends: 812 [2021-12-21 10:19:04,110 INFO L226 Difference]: Without dead ends: 808 [2021-12-21 10:19:04,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:04,111 INFO L933 BasicCegarLoop]: 652 mSDtfsCounter, 22 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:04,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 1258 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:19:04,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-12-21 10:19:04,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 808. [2021-12-21 10:19:04,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 664 states have (on average 1.4262048192771084) internal successors, (947), 661 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) [2021-12-21 10:19:04,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1219 transitions. [2021-12-21 10:19:04,135 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1219 transitions. Word has length 23 [2021-12-21 10:19:04,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:04,135 INFO L470 AbstractCegarLoop]: Abstraction has 808 states and 1219 transitions. [2021-12-21 10:19:04,135 INFO L471 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) [2021-12-21 10:19:04,136 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1219 transitions. [2021-12-21 10:19:04,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 10:19:04,137 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:04,137 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:04,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 10:19:04,137 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:04,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:04,138 INFO L85 PathProgramCache]: Analyzing trace with hash 18720905, now seen corresponding path program 1 times [2021-12-21 10:19:04,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:04,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462940142] [2021-12-21 10:19:04,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:04,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:04,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:04,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:04,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462940142] [2021-12-21 10:19:04,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462940142] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:04,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:04,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:19:04,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773870700] [2021-12-21 10:19:04,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:04,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:19:04,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:04,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:19:04,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:19:04,172 INFO L87 Difference]: Start difference. First operand 808 states and 1219 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) [2021-12-21 10:19:04,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:04,249 INFO L93 Difference]: Finished difference Result 1228 states and 1788 transitions. [2021-12-21 10:19:04,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 10:19:04,249 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 [2021-12-21 10:19:04,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:04,252 INFO L225 Difference]: With dead ends: 1228 [2021-12-21 10:19:04,252 INFO L226 Difference]: Without dead ends: 812 [2021-12-21 10:19:04,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:04,254 INFO L933 BasicCegarLoop]: 766 mSDtfsCounter, 323 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 1958 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:04,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 1958 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:19:04,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-12-21 10:19:04,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 683. [2021-12-21 10:19:04,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 560 states have (on average 1.4089285714285715) internal successors, (789), 559 states have internal predecessors, (789), 89 states have call successors, (89), 28 states have call predecessors, (89), 33 states have return successors, (109), 95 states have call predecessors, (109), 81 states have call successors, (109) [2021-12-21 10:19:04,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 987 transitions. [2021-12-21 10:19:04,275 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 987 transitions. Word has length 28 [2021-12-21 10:19:04,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:04,275 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 987 transitions. [2021-12-21 10:19:04,275 INFO L471 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) [2021-12-21 10:19:04,276 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 987 transitions. [2021-12-21 10:19:04,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-21 10:19:04,277 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:04,277 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:04,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 10:19:04,277 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:04,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:04,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1728135655, now seen corresponding path program 1 times [2021-12-21 10:19:04,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:04,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809466071] [2021-12-21 10:19:04,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:04,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:04,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:04,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809466071] [2021-12-21 10:19:04,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809466071] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:04,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:04,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:19:04,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508044238] [2021-12-21 10:19:04,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:04,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:19:04,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:04,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:19:04,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:04,315 INFO L87 Difference]: Start difference. First operand 683 states and 987 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) [2021-12-21 10:19:04,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:04,345 INFO L93 Difference]: Finished difference Result 768 states and 1098 transitions. [2021-12-21 10:19:04,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:19:04,345 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 [2021-12-21 10:19:04,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:04,349 INFO L225 Difference]: With dead ends: 768 [2021-12-21 10:19:04,349 INFO L226 Difference]: Without dead ends: 748 [2021-12-21 10:19:04,349 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:04,349 INFO L933 BasicCegarLoop]: 657 mSDtfsCounter, 628 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:04,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [628 Valid, 721 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:19:04,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-12-21 10:19:04,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 711. [2021-12-21 10:19:04,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 586 states have (on average 1.418088737201365) internal successors, (831), 592 states have internal predecessors, (831), 89 states have call successors, (89), 29 states have call predecessors, (89), 35 states have return successors, (104), 89 states have call predecessors, (104), 82 states have call successors, (104) [2021-12-21 10:19:04,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1024 transitions. [2021-12-21 10:19:04,372 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1024 transitions. Word has length 29 [2021-12-21 10:19:04,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:04,373 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 1024 transitions. [2021-12-21 10:19:04,373 INFO L471 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) [2021-12-21 10:19:04,373 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1024 transitions. [2021-12-21 10:19:04,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 10:19:04,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:04,376 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:04,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 10:19:04,376 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:04,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:04,377 INFO L85 PathProgramCache]: Analyzing trace with hash -881374565, now seen corresponding path program 1 times [2021-12-21 10:19:04,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:04,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190715715] [2021-12-21 10:19:04,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:04,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:04,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:04,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 10:19:04,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:04,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:04,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:04,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190715715] [2021-12-21 10:19:04,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190715715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:04,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:04,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:19:04,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733339112] [2021-12-21 10:19:04,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:04,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:19:04,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:04,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:19:04,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:19:04,416 INFO L87 Difference]: Start difference. First operand 711 states and 1024 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) [2021-12-21 10:19:04,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:04,596 INFO L93 Difference]: Finished difference Result 1007 states and 1455 transitions. [2021-12-21 10:19:04,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 10:19:04,597 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 [2021-12-21 10:19:04,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:04,600 INFO L225 Difference]: With dead ends: 1007 [2021-12-21 10:19:04,600 INFO L226 Difference]: Without dead ends: 780 [2021-12-21 10:19:04,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:04,602 INFO L933 BasicCegarLoop]: 732 mSDtfsCounter, 254 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1782 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:04,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 1782 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:04,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-12-21 10:19:04,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 694. [2021-12-21 10:19:04,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 571 states have (on average 1.4133099824868651) internal successors, (807), 579 states have internal predecessors, (807), 88 states have call successors, (88), 28 states have call predecessors, (88), 34 states have return successors, (100), 86 states have call predecessors, (100), 81 states have call successors, (100) [2021-12-21 10:19:04,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 995 transitions. [2021-12-21 10:19:04,629 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 995 transitions. Word has length 35 [2021-12-21 10:19:04,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:04,630 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 995 transitions. [2021-12-21 10:19:04,630 INFO L471 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) [2021-12-21 10:19:04,630 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 995 transitions. [2021-12-21 10:19:04,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-21 10:19:04,632 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:04,632 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:04,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 10:19:04,632 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:04,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:04,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1008894041, now seen corresponding path program 1 times [2021-12-21 10:19:04,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:04,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103729789] [2021-12-21 10:19:04,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:04,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:04,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:04,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:04,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:04,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103729789] [2021-12-21 10:19:04,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103729789] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:04,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:04,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:19:04,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651303353] [2021-12-21 10:19:04,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:04,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:19:04,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:04,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:19:04,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:19:04,667 INFO L87 Difference]: Start difference. First operand 694 states and 995 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) [2021-12-21 10:19:04,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:04,848 INFO L93 Difference]: Finished difference Result 754 states and 1071 transitions. [2021-12-21 10:19:04,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:19:04,848 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 [2021-12-21 10:19:04,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:04,851 INFO L225 Difference]: With dead ends: 754 [2021-12-21 10:19:04,851 INFO L226 Difference]: Without dead ends: 712 [2021-12-21 10:19:04,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:04,852 INFO L933 BasicCegarLoop]: 647 mSDtfsCounter, 696 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:04,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 1109 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:04,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-12-21 10:19:04,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 694. [2021-12-21 10:19:04,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 571 states have (on average 1.4098073555166375) internal successors, (805), 579 states have internal predecessors, (805), 88 states have call successors, (88), 28 states have call predecessors, (88), 34 states have return successors, (100), 86 states have call predecessors, (100), 81 states have call successors, (100) [2021-12-21 10:19:04,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 993 transitions. [2021-12-21 10:19:04,894 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 993 transitions. Word has length 32 [2021-12-21 10:19:04,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:04,895 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 993 transitions. [2021-12-21 10:19:04,895 INFO L471 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) [2021-12-21 10:19:04,895 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 993 transitions. [2021-12-21 10:19:04,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-21 10:19:04,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:04,897 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:04,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 10:19:04,898 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:04,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:04,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1219758973, now seen corresponding path program 1 times [2021-12-21 10:19:04,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:04,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523929410] [2021-12-21 10:19:04,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:04,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:04,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:04,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 10:19:04,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:04,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:04,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:04,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523929410] [2021-12-21 10:19:04,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523929410] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:04,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:04,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:19:04,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278586113] [2021-12-21 10:19:04,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:04,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:19:04,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:04,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:19:04,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:19:04,939 INFO L87 Difference]: Start difference. First operand 694 states and 993 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) [2021-12-21 10:19:05,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:05,101 INFO L93 Difference]: Finished difference Result 779 states and 1121 transitions. [2021-12-21 10:19:05,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 10:19:05,101 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 [2021-12-21 10:19:05,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:05,104 INFO L225 Difference]: With dead ends: 779 [2021-12-21 10:19:05,104 INFO L226 Difference]: Without dead ends: 719 [2021-12-21 10:19:05,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:05,105 INFO L933 BasicCegarLoop]: 653 mSDtfsCounter, 706 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 1261 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:05,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [727 Valid, 1261 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:05,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-12-21 10:19:05,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 683. [2021-12-21 10:19:05,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 564 states have (on average 1.4113475177304964) internal successors, (796), 572 states have internal predecessors, (796), 86 states have call successors, (86), 26 states have call predecessors, (86), 32 states have return successors, (98), 84 states have call predecessors, (98), 79 states have call successors, (98) [2021-12-21 10:19:05,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 980 transitions. [2021-12-21 10:19:05,129 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 980 transitions. Word has length 36 [2021-12-21 10:19:05,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:05,129 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 980 transitions. [2021-12-21 10:19:05,129 INFO L471 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) [2021-12-21 10:19:05,129 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 980 transitions. [2021-12-21 10:19:05,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 10:19:05,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:05,131 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:05,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 10:19:05,131 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:05,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:05,131 INFO L85 PathProgramCache]: Analyzing trace with hash 138802018, now seen corresponding path program 1 times [2021-12-21 10:19:05,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:05,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089671566] [2021-12-21 10:19:05,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:05,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:05,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:05,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:05,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089671566] [2021-12-21 10:19:05,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089671566] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:05,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:05,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:19:05,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720920100] [2021-12-21 10:19:05,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:05,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:19:05,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:05,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:19:05,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:05,158 INFO L87 Difference]: Start difference. First operand 683 states and 980 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) [2021-12-21 10:19:05,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:05,228 INFO L93 Difference]: Finished difference Result 851 states and 1212 transitions. [2021-12-21 10:19:05,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:19:05,228 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 [2021-12-21 10:19:05,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:05,232 INFO L225 Difference]: With dead ends: 851 [2021-12-21 10:19:05,232 INFO L226 Difference]: Without dead ends: 835 [2021-12-21 10:19:05,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:05,233 INFO L933 BasicCegarLoop]: 759 mSDtfsCounter, 135 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1375 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 [2021-12-21 10:19:05,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 1375 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:19:05,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-12-21 10:19:05,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 734. [2021-12-21 10:19:05,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 611 states have (on average 1.386252045826514) internal successors, (847), 612 states have internal predecessors, (847), 86 states have call successors, (86), 26 states have call predecessors, (86), 36 states have return successors, (109), 95 states have call predecessors, (109), 79 states have call successors, (109) [2021-12-21 10:19:05,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1042 transitions. [2021-12-21 10:19:05,263 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1042 transitions. Word has length 34 [2021-12-21 10:19:05,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:05,263 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 1042 transitions. [2021-12-21 10:19:05,264 INFO L471 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) [2021-12-21 10:19:05,264 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1042 transitions. [2021-12-21 10:19:05,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 10:19:05,265 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:05,265 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:05,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 10:19:05,266 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:05,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:05,266 INFO L85 PathProgramCache]: Analyzing trace with hash -298326112, now seen corresponding path program 1 times [2021-12-21 10:19:05,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:05,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516851182] [2021-12-21 10:19:05,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:05,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:05,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:05,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:05,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516851182] [2021-12-21 10:19:05,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516851182] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:05,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:05,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:19:05,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520365152] [2021-12-21 10:19:05,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:05,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:19:05,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:05,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:19:05,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:19:05,315 INFO L87 Difference]: Start difference. First operand 734 states and 1042 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:05,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:05,497 INFO L93 Difference]: Finished difference Result 762 states and 1073 transitions. [2021-12-21 10:19:05,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:19:05,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-21 10:19:05,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:05,500 INFO L225 Difference]: With dead ends: 762 [2021-12-21 10:19:05,501 INFO L226 Difference]: Without dead ends: 715 [2021-12-21 10:19:05,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:05,502 INFO L933 BasicCegarLoop]: 643 mSDtfsCounter, 674 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 1105 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:05,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [674 Valid, 1105 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:05,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-12-21 10:19:05,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 705. [2021-12-21 10:19:05,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 585 states have (on average 1.3914529914529914) internal successors, (814), 592 states have internal predecessors, (814), 86 states have call successors, (86), 26 states have call predecessors, (86), 33 states have return successors, (98), 86 states have call predecessors, (98), 79 states have call successors, (98) [2021-12-21 10:19:05,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 998 transitions. [2021-12-21 10:19:05,530 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 998 transitions. Word has length 34 [2021-12-21 10:19:05,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:05,530 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 998 transitions. [2021-12-21 10:19:05,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:05,530 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 998 transitions. [2021-12-21 10:19:05,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 10:19:05,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:05,532 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:05,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 10:19:05,532 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:05,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:05,532 INFO L85 PathProgramCache]: Analyzing trace with hash 452395620, now seen corresponding path program 1 times [2021-12-21 10:19:05,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:05,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447673141] [2021-12-21 10:19:05,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:05,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:05,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:05,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:05,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:05,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447673141] [2021-12-21 10:19:05,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447673141] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:05,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:05,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:19:05,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759293110] [2021-12-21 10:19:05,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:05,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:19:05,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:05,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:19:05,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:19:05,587 INFO L87 Difference]: Start difference. First operand 705 states and 998 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) [2021-12-21 10:19:05,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:05,804 INFO L93 Difference]: Finished difference Result 806 states and 1144 transitions. [2021-12-21 10:19:05,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:19:05,804 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 [2021-12-21 10:19:05,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:05,807 INFO L225 Difference]: With dead ends: 806 [2021-12-21 10:19:05,807 INFO L226 Difference]: Without dead ends: 802 [2021-12-21 10:19:05,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:05,808 INFO L933 BasicCegarLoop]: 741 mSDtfsCounter, 747 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:05,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [756 Valid, 1199 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:05,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-12-21 10:19:05,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 708. [2021-12-21 10:19:05,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 588 states have (on average 1.3911564625850341) internal successors, (818), 595 states have internal predecessors, (818), 86 states have call successors, (86), 26 states have call predecessors, (86), 33 states have return successors, (98), 86 states have call predecessors, (98), 79 states have call successors, (98) [2021-12-21 10:19:05,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1002 transitions. [2021-12-21 10:19:05,854 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1002 transitions. Word has length 35 [2021-12-21 10:19:05,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:05,854 INFO L470 AbstractCegarLoop]: Abstraction has 708 states and 1002 transitions. [2021-12-21 10:19:05,855 INFO L471 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) [2021-12-21 10:19:05,855 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1002 transitions. [2021-12-21 10:19:05,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 10:19:05,856 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:05,856 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:05,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 10:19:05,856 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:05,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:05,857 INFO L85 PathProgramCache]: Analyzing trace with hash 452672450, now seen corresponding path program 1 times [2021-12-21 10:19:05,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:05,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062591696] [2021-12-21 10:19:05,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:05,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:05,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:05,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:05,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:05,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062591696] [2021-12-21 10:19:05,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062591696] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:05,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:05,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 10:19:05,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655188809] [2021-12-21 10:19:05,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:05,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 10:19:05,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:05,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 10:19:05,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:19:05,889 INFO L87 Difference]: Start difference. First operand 708 states and 1002 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) [2021-12-21 10:19:05,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:05,958 INFO L93 Difference]: Finished difference Result 721 states and 1015 transitions. [2021-12-21 10:19:05,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 10:19:05,958 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 [2021-12-21 10:19:05,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:05,961 INFO L225 Difference]: With dead ends: 721 [2021-12-21 10:19:05,961 INFO L226 Difference]: Without dead ends: 691 [2021-12-21 10:19:05,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:19:05,962 INFO L933 BasicCegarLoop]: 651 mSDtfsCounter, 38 mSDsluCounter, 2556 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 3207 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:05,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 3207 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:19:05,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-12-21 10:19:05,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 691. [2021-12-21 10:19:05,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 571 states have (on average 1.3975481611208407) internal successors, (798), 578 states have internal predecessors, (798), 86 states have call successors, (86), 26 states have call predecessors, (86), 33 states have return successors, (98), 86 states have call predecessors, (98), 79 states have call successors, (98) [2021-12-21 10:19:06,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 982 transitions. [2021-12-21 10:19:06,005 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 982 transitions. Word has length 35 [2021-12-21 10:19:06,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:06,005 INFO L470 AbstractCegarLoop]: Abstraction has 691 states and 982 transitions. [2021-12-21 10:19:06,005 INFO L471 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) [2021-12-21 10:19:06,006 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 982 transitions. [2021-12-21 10:19:06,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-21 10:19:06,007 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:06,007 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:06,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 10:19:06,007 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:06,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:06,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1417116411, now seen corresponding path program 1 times [2021-12-21 10:19:06,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:06,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457443385] [2021-12-21 10:19:06,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:06,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:06,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:06,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 10:19:06,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:06,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:06,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457443385] [2021-12-21 10:19:06,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457443385] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:06,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:06,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:19:06,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155182316] [2021-12-21 10:19:06,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:06,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:19:06,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:06,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:19:06,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:19:06,043 INFO L87 Difference]: Start difference. First operand 691 states and 982 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) [2021-12-21 10:19:06,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:06,222 INFO L93 Difference]: Finished difference Result 732 states and 1051 transitions. [2021-12-21 10:19:06,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 10:19:06,222 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 [2021-12-21 10:19:06,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:06,225 INFO L225 Difference]: With dead ends: 732 [2021-12-21 10:19:06,225 INFO L226 Difference]: Without dead ends: 725 [2021-12-21 10:19:06,226 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:06,226 INFO L933 BasicCegarLoop]: 628 mSDtfsCounter, 153 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 1553 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:06,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 1553 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:06,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-12-21 10:19:06,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 705. [2021-12-21 10:19:06,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 585 states have (on average 1.393162393162393) internal successors, (815), 592 states have internal predecessors, (815), 86 states have call successors, (86), 26 states have call predecessors, (86), 33 states have return successors, (98), 86 states have call predecessors, (98), 79 states have call successors, (98) [2021-12-21 10:19:06,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 999 transitions. [2021-12-21 10:19:06,269 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 999 transitions. Word has length 37 [2021-12-21 10:19:06,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:06,269 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 999 transitions. [2021-12-21 10:19:06,269 INFO L471 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) [2021-12-21 10:19:06,270 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 999 transitions. [2021-12-21 10:19:06,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-21 10:19:06,271 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:06,271 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:06,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 10:19:06,271 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:06,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:06,272 INFO L85 PathProgramCache]: Analyzing trace with hash 607738208, now seen corresponding path program 1 times [2021-12-21 10:19:06,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:06,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801100199] [2021-12-21 10:19:06,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:06,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:06,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 10:19:06,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:06,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:06,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:06,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801100199] [2021-12-21 10:19:06,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801100199] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:06,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:06,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 10:19:06,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473194064] [2021-12-21 10:19:06,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:06,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 10:19:06,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:06,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 10:19:06,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:19:06,338 INFO L87 Difference]: Start difference. First operand 705 states and 999 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) [2021-12-21 10:19:06,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:06,652 INFO L93 Difference]: Finished difference Result 731 states and 1047 transitions. [2021-12-21 10:19:06,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 10:19:06,652 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 [2021-12-21 10:19:06,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:06,655 INFO L225 Difference]: With dead ends: 731 [2021-12-21 10:19:06,655 INFO L226 Difference]: Without dead ends: 725 [2021-12-21 10:19:06,655 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:06,656 INFO L933 BasicCegarLoop]: 622 mSDtfsCounter, 750 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 1884 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:06,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [794 Valid, 1884 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:06,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-12-21 10:19:06,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 705. [2021-12-21 10:19:06,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 585 states have (on average 1.3914529914529914) internal successors, (814), 592 states have internal predecessors, (814), 86 states have call successors, (86), 26 states have call predecessors, (86), 33 states have return successors, (98), 86 states have call predecessors, (98), 79 states have call successors, (98) [2021-12-21 10:19:06,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 998 transitions. [2021-12-21 10:19:06,691 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 998 transitions. Word has length 39 [2021-12-21 10:19:06,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:06,691 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 998 transitions. [2021-12-21 10:19:06,691 INFO L471 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) [2021-12-21 10:19:06,691 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 998 transitions. [2021-12-21 10:19:06,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-21 10:19:06,692 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:06,693 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:06,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 10:19:06,693 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:06,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:06,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1973073460, now seen corresponding path program 1 times [2021-12-21 10:19:06,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:06,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808196896] [2021-12-21 10:19:06,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:06,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:06,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:06,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 10:19:06,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:06,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:06,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:06,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808196896] [2021-12-21 10:19:06,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808196896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:06,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:06,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 10:19:06,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834834856] [2021-12-21 10:19:06,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:06,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 10:19:06,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:06,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 10:19:06,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:19:06,773 INFO L87 Difference]: Start difference. First operand 705 states and 998 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) [2021-12-21 10:19:07,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:07,071 INFO L93 Difference]: Finished difference Result 744 states and 1063 transitions. [2021-12-21 10:19:07,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 10:19:07,072 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 [2021-12-21 10:19:07,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:07,075 INFO L225 Difference]: With dead ends: 744 [2021-12-21 10:19:07,075 INFO L226 Difference]: Without dead ends: 712 [2021-12-21 10:19:07,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:19:07,076 INFO L933 BasicCegarLoop]: 621 mSDtfsCounter, 158 mSDsluCounter, 3366 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 3987 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:07,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 3987 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:07,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-12-21 10:19:07,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 696. [2021-12-21 10:19:07,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 578 states have (on average 1.3737024221453287) internal successors, (794), 585 states have internal predecessors, (794), 84 states have call successors, (84), 26 states have call predecessors, (84), 33 states have return successors, (96), 84 states have call predecessors, (96), 77 states have call successors, (96) [2021-12-21 10:19:07,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 974 transitions. [2021-12-21 10:19:07,113 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 974 transitions. Word has length 40 [2021-12-21 10:19:07,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:07,113 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 974 transitions. [2021-12-21 10:19:07,113 INFO L471 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) [2021-12-21 10:19:07,113 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 974 transitions. [2021-12-21 10:19:07,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-21 10:19:07,115 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:07,115 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:07,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 10:19:07,115 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:07,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:07,117 INFO L85 PathProgramCache]: Analyzing trace with hash -577176493, now seen corresponding path program 1 times [2021-12-21 10:19:07,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:07,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761365967] [2021-12-21 10:19:07,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:07,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:07,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:07,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 10:19:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:07,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:07,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:07,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761365967] [2021-12-21 10:19:07,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761365967] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:07,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:07,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 10:19:07,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288303450] [2021-12-21 10:19:07,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:07,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 10:19:07,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:07,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 10:19:07,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:07,152 INFO L87 Difference]: Start difference. First operand 696 states and 974 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) [2021-12-21 10:19:07,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:07,508 INFO L93 Difference]: Finished difference Result 777 states and 1087 transitions. [2021-12-21 10:19:07,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 10:19:07,508 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 [2021-12-21 10:19:07,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:07,511 INFO L225 Difference]: With dead ends: 777 [2021-12-21 10:19:07,511 INFO L226 Difference]: Without dead ends: 741 [2021-12-21 10:19:07,511 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:07,512 INFO L933 BasicCegarLoop]: 663 mSDtfsCounter, 792 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 1517 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:07,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [812 Valid, 1517 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:19:07,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-12-21 10:19:07,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 696. [2021-12-21 10:19:07,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 578 states have (on average 1.3719723183391004) internal successors, (793), 585 states have internal predecessors, (793), 84 states have call successors, (84), 26 states have call predecessors, (84), 33 states have return successors, (96), 84 states have call predecessors, (96), 77 states have call successors, (96) [2021-12-21 10:19:07,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 973 transitions. [2021-12-21 10:19:07,551 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 973 transitions. Word has length 41 [2021-12-21 10:19:07,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:07,551 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 973 transitions. [2021-12-21 10:19:07,551 INFO L471 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) [2021-12-21 10:19:07,551 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 973 transitions. [2021-12-21 10:19:07,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-21 10:19:07,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:07,552 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:07,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 10:19:07,553 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:07,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:07,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1220210391, now seen corresponding path program 1 times [2021-12-21 10:19:07,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:07,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153831706] [2021-12-21 10:19:07,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:07,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:07,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:07,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 10:19:07,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:07,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 10:19:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:07,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:07,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153831706] [2021-12-21 10:19:07,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153831706] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:07,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:07,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 10:19:07,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100663751] [2021-12-21 10:19:07,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:07,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 10:19:07,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:07,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 10:19:07,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:07,582 INFO L87 Difference]: Start difference. First operand 696 states and 973 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) [2021-12-21 10:19:07,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:07,926 INFO L93 Difference]: Finished difference Result 906 states and 1276 transitions. [2021-12-21 10:19:07,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 10:19:07,927 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 [2021-12-21 10:19:07,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:07,929 INFO L225 Difference]: With dead ends: 906 [2021-12-21 10:19:07,930 INFO L226 Difference]: Without dead ends: 688 [2021-12-21 10:19:07,930 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:07,931 INFO L933 BasicCegarLoop]: 605 mSDtfsCounter, 252 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 1847 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:07,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 1847 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:19:07,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-12-21 10:19:07,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 672. [2021-12-21 10:19:07,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 557 states have (on average 1.3698384201077198) internal successors, (763), 563 states have internal predecessors, (763), 83 states have call successors, (83), 26 states have call predecessors, (83), 31 states have return successors, (94), 82 states have call predecessors, (94), 77 states have call successors, (94) [2021-12-21 10:19:07,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 940 transitions. [2021-12-21 10:19:07,968 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 940 transitions. Word has length 43 [2021-12-21 10:19:07,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:07,968 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 940 transitions. [2021-12-21 10:19:07,969 INFO L471 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) [2021-12-21 10:19:07,969 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 940 transitions. [2021-12-21 10:19:07,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-21 10:19:07,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:07,970 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:07,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 10:19:07,970 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:07,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:07,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1828304678, now seen corresponding path program 1 times [2021-12-21 10:19:07,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:07,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856931218] [2021-12-21 10:19:07,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:07,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:08,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 10:19:08,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:08,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:08,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:08,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:08,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:08,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856931218] [2021-12-21 10:19:08,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856931218] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:08,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:08,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 10:19:08,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713529542] [2021-12-21 10:19:08,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:08,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 10:19:08,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:08,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 10:19:08,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-21 10:19:08,074 INFO L87 Difference]: Start difference. First operand 672 states and 940 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) [2021-12-21 10:19:08,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:08,621 INFO L93 Difference]: Finished difference Result 702 states and 994 transitions. [2021-12-21 10:19:08,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 10:19:08,622 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 [2021-12-21 10:19:08,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:08,624 INFO L225 Difference]: With dead ends: 702 [2021-12-21 10:19:08,624 INFO L226 Difference]: Without dead ends: 686 [2021-12-21 10:19:08,625 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:08,625 INFO L933 BasicCegarLoop]: 611 mSDtfsCounter, 98 mSDsluCounter, 3850 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 4461 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:08,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 4461 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:19:08,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-12-21 10:19:08,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 670. [2021-12-21 10:19:08,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 556 states have (on average 1.368705035971223) internal successors, (761), 562 states have internal predecessors, (761), 82 states have call successors, (82), 26 states have call predecessors, (82), 31 states have return successors, (93), 81 states have call predecessors, (93), 76 states have call successors, (93) [2021-12-21 10:19:08,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 936 transitions. [2021-12-21 10:19:08,656 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 936 transitions. Word has length 43 [2021-12-21 10:19:08,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:08,656 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 936 transitions. [2021-12-21 10:19:08,656 INFO L471 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) [2021-12-21 10:19:08,656 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 936 transitions. [2021-12-21 10:19:08,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-21 10:19:08,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:08,658 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:08,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 10:19:08,658 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:08,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:08,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1534576112, now seen corresponding path program 1 times [2021-12-21 10:19:08,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:08,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775105417] [2021-12-21 10:19:08,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:08,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:08,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:08,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 10:19:08,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:08,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:08,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:08,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775105417] [2021-12-21 10:19:08,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775105417] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:08,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:08,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-21 10:19:08,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273631162] [2021-12-21 10:19:08,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:08,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 10:19:08,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:08,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 10:19:08,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-21 10:19:08,764 INFO L87 Difference]: Start difference. First operand 670 states and 936 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) [2021-12-21 10:19:09,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:09,368 INFO L93 Difference]: Finished difference Result 722 states and 1014 transitions. [2021-12-21 10:19:09,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 10:19:09,369 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 [2021-12-21 10:19:09,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:09,371 INFO L225 Difference]: With dead ends: 722 [2021-12-21 10:19:09,371 INFO L226 Difference]: Without dead ends: 702 [2021-12-21 10:19:09,372 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:09,373 INFO L933 BasicCegarLoop]: 597 mSDtfsCounter, 247 mSDsluCounter, 4442 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 5039 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:09,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 5039 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:19:09,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-12-21 10:19:09,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 668. [2021-12-21 10:19:09,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 555 states have (on average 1.3675675675675676) internal successors, (759), 561 states have internal predecessors, (759), 81 states have call successors, (81), 26 states have call predecessors, (81), 31 states have return successors, (92), 80 states have call predecessors, (92), 75 states have call successors, (92) [2021-12-21 10:19:09,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 932 transitions. [2021-12-21 10:19:09,403 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 932 transitions. Word has length 47 [2021-12-21 10:19:09,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:09,404 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 932 transitions. [2021-12-21 10:19:09,404 INFO L471 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) [2021-12-21 10:19:09,404 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 932 transitions. [2021-12-21 10:19:09,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 10:19:09,405 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:09,405 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:09,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-21 10:19:09,406 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:09,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:09,406 INFO L85 PathProgramCache]: Analyzing trace with hash 397890919, now seen corresponding path program 1 times [2021-12-21 10:19:09,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:09,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691597840] [2021-12-21 10:19:09,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:09,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:09,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:09,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:09,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:09,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:09,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:09,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691597840] [2021-12-21 10:19:09,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691597840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:09,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:09,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-21 10:19:09,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482213172] [2021-12-21 10:19:09,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:09,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 10:19:09,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:09,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 10:19:09,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-21 10:19:09,497 INFO L87 Difference]: Start difference. First operand 668 states and 932 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) [2021-12-21 10:19:10,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:10,181 INFO L93 Difference]: Finished difference Result 720 states and 1010 transitions. [2021-12-21 10:19:10,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 10:19:10,182 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 [2021-12-21 10:19:10,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:10,184 INFO L225 Difference]: With dead ends: 720 [2021-12-21 10:19:10,184 INFO L226 Difference]: Without dead ends: 699 [2021-12-21 10:19:10,185 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:10,185 INFO L933 BasicCegarLoop]: 581 mSDtfsCounter, 168 mSDsluCounter, 5275 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 5856 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:10,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 5856 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:19:10,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-12-21 10:19:10,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 667. [2021-12-21 10:19:10,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 554 states have (on average 1.3501805054151625) internal successors, (748), 560 states have internal predecessors, (748), 81 states have call successors, (81), 26 states have call predecessors, (81), 31 states have return successors, (92), 80 states have call predecessors, (92), 75 states have call successors, (92) [2021-12-21 10:19:10,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 921 transitions. [2021-12-21 10:19:10,228 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 921 transitions. Word has length 44 [2021-12-21 10:19:10,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:10,228 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 921 transitions. [2021-12-21 10:19:10,228 INFO L471 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) [2021-12-21 10:19:10,228 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 921 transitions. [2021-12-21 10:19:10,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 10:19:10,231 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:10,232 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:10,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-21 10:19:10,232 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:10,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:10,232 INFO L85 PathProgramCache]: Analyzing trace with hash 117751789, now seen corresponding path program 1 times [2021-12-21 10:19:10,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:10,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398724752] [2021-12-21 10:19:10,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:10,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:10,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:10,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 10:19:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:10,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:10,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:10,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:10,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398724752] [2021-12-21 10:19:10,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398724752] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:10,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:10,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 10:19:10,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182699902] [2021-12-21 10:19:10,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:10,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 10:19:10,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:10,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 10:19:10,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-21 10:19:10,347 INFO L87 Difference]: Start difference. First operand 667 states and 921 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) [2021-12-21 10:19:10,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:10,954 INFO L93 Difference]: Finished difference Result 696 states and 974 transitions. [2021-12-21 10:19:10,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 10:19:10,955 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 [2021-12-21 10:19:10,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:10,957 INFO L225 Difference]: With dead ends: 696 [2021-12-21 10:19:10,957 INFO L226 Difference]: Without dead ends: 680 [2021-12-21 10:19:10,958 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:10,958 INFO L933 BasicCegarLoop]: 589 mSDtfsCounter, 98 mSDsluCounter, 3693 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 4282 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:10,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 4282 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:19:10,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-12-21 10:19:10,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 664. [2021-12-21 10:19:10,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 552 states have (on average 1.3496376811594204) internal successors, (745), 558 states have internal predecessors, (745), 80 states have call successors, (80), 26 states have call predecessors, (80), 31 states have return successors, (91), 79 states have call predecessors, (91), 74 states have call successors, (91) [2021-12-21 10:19:10,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 916 transitions. [2021-12-21 10:19:10,987 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 916 transitions. Word has length 44 [2021-12-21 10:19:10,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:10,988 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 916 transitions. [2021-12-21 10:19:10,988 INFO L471 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) [2021-12-21 10:19:10,988 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 916 transitions. [2021-12-21 10:19:10,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 10:19:10,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:10,989 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:10,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-21 10:19:10,990 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:10,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:10,990 INFO L85 PathProgramCache]: Analyzing trace with hash -914670889, now seen corresponding path program 1 times [2021-12-21 10:19:10,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:10,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247148808] [2021-12-21 10:19:10,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:10,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:11,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:11,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 10:19:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:11,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:11,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:11,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247148808] [2021-12-21 10:19:11,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247148808] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:11,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:11,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 10:19:11,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481354237] [2021-12-21 10:19:11,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:11,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 10:19:11,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:11,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 10:19:11,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:19:11,044 INFO L87 Difference]: Start difference. First operand 664 states and 916 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) [2021-12-21 10:19:11,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:11,391 INFO L93 Difference]: Finished difference Result 735 states and 1013 transitions. [2021-12-21 10:19:11,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 10:19:11,391 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 [2021-12-21 10:19:11,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:11,394 INFO L225 Difference]: With dead ends: 735 [2021-12-21 10:19:11,394 INFO L226 Difference]: Without dead ends: 668 [2021-12-21 10:19:11,394 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:11,394 INFO L933 BasicCegarLoop]: 585 mSDtfsCounter, 235 mSDsluCounter, 3109 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 3694 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:11,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 3694 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:11,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-12-21 10:19:11,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 652. [2021-12-21 10:19:11,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 543 states have (on average 1.3443830570902393) internal successors, (730), 549 states have internal predecessors, (730), 77 states have call successors, (77), 26 states have call predecessors, (77), 31 states have return successors, (88), 76 states have call predecessors, (88), 71 states have call successors, (88) [2021-12-21 10:19:11,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 895 transitions. [2021-12-21 10:19:11,426 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 895 transitions. Word has length 44 [2021-12-21 10:19:11,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:11,426 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 895 transitions. [2021-12-21 10:19:11,427 INFO L471 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) [2021-12-21 10:19:11,427 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 895 transitions. [2021-12-21 10:19:11,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 10:19:11,428 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:11,428 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:11,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-21 10:19:11,428 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:11,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:11,429 INFO L85 PathProgramCache]: Analyzing trace with hash -501722536, now seen corresponding path program 1 times [2021-12-21 10:19:11,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:11,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003149269] [2021-12-21 10:19:11,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:11,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:11,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:11,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:11,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:11,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 10:19:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:11,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:11,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:11,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003149269] [2021-12-21 10:19:11,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003149269] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:11,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:11,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 10:19:11,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339635593] [2021-12-21 10:19:11,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:11,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 10:19:11,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:11,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 10:19:11,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:19:11,463 INFO L87 Difference]: Start difference. First operand 652 states and 895 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) [2021-12-21 10:19:11,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:11,786 INFO L93 Difference]: Finished difference Result 797 states and 1137 transitions. [2021-12-21 10:19:11,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 10:19:11,787 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 [2021-12-21 10:19:11,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:11,790 INFO L225 Difference]: With dead ends: 797 [2021-12-21 10:19:11,790 INFO L226 Difference]: Without dead ends: 703 [2021-12-21 10:19:11,790 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:11,791 INFO L933 BasicCegarLoop]: 540 mSDtfsCounter, 130 mSDsluCounter, 1688 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 2228 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:11,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 2228 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:19:11,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-12-21 10:19:11,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 659. [2021-12-21 10:19:11,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 548 states have (on average 1.344890510948905) internal successors, (737), 555 states have internal predecessors, (737), 78 states have call successors, (78), 26 states have call predecessors, (78), 32 states have return successors, (95), 77 states have call predecessors, (95), 72 states have call successors, (95) [2021-12-21 10:19:11,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 910 transitions. [2021-12-21 10:19:11,820 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 910 transitions. Word has length 45 [2021-12-21 10:19:11,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:11,820 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 910 transitions. [2021-12-21 10:19:11,821 INFO L471 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) [2021-12-21 10:19:11,821 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 910 transitions. [2021-12-21 10:19:11,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 10:19:11,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:11,825 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:11,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-21 10:19:11,826 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:11,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:11,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1011195626, now seen corresponding path program 1 times [2021-12-21 10:19:11,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:11,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471013083] [2021-12-21 10:19:11,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:11,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:11,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:11,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:11,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:11,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 10:19:11,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:11,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:11,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:11,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471013083] [2021-12-21 10:19:11,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471013083] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:11,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:11,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 10:19:11,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346531728] [2021-12-21 10:19:11,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:11,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 10:19:11,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:11,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 10:19:11,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:19:11,877 INFO L87 Difference]: Start difference. First operand 659 states and 910 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) [2021-12-21 10:19:12,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:12,210 INFO L93 Difference]: Finished difference Result 697 states and 978 transitions. [2021-12-21 10:19:12,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 10:19:12,210 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 [2021-12-21 10:19:12,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:12,212 INFO L225 Difference]: With dead ends: 697 [2021-12-21 10:19:12,212 INFO L226 Difference]: Without dead ends: 677 [2021-12-21 10:19:12,213 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:12,213 INFO L933 BasicCegarLoop]: 553 mSDtfsCounter, 245 mSDsluCounter, 2917 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 3470 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:12,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 3470 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:12,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-12-21 10:19:12,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 657. [2021-12-21 10:19:12,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 547 states have (on average 1.3436928702010968) internal successors, (735), 554 states have internal predecessors, (735), 77 states have call successors, (77), 26 states have call predecessors, (77), 32 states have return successors, (94), 76 states have call predecessors, (94), 71 states have call successors, (94) [2021-12-21 10:19:12,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 906 transitions. [2021-12-21 10:19:12,239 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 906 transitions. Word has length 45 [2021-12-21 10:19:12,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:12,240 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 906 transitions. [2021-12-21 10:19:12,240 INFO L471 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) [2021-12-21 10:19:12,240 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 906 transitions. [2021-12-21 10:19:12,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 10:19:12,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:12,241 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:12,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-21 10:19:12,241 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:12,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:12,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1504244121, now seen corresponding path program 1 times [2021-12-21 10:19:12,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:12,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301249062] [2021-12-21 10:19:12,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:12,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:12,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:12,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 10:19:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:12,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:12,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:12,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301249062] [2021-12-21 10:19:12,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301249062] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:12,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:12,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 10:19:12,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270252688] [2021-12-21 10:19:12,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:12,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 10:19:12,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:12,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 10:19:12,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:19:12,286 INFO L87 Difference]: Start difference. First operand 657 states and 906 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) [2021-12-21 10:19:12,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:12,567 INFO L93 Difference]: Finished difference Result 704 states and 988 transitions. [2021-12-21 10:19:12,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 10:19:12,567 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 [2021-12-21 10:19:12,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:12,570 INFO L225 Difference]: With dead ends: 704 [2021-12-21 10:19:12,570 INFO L226 Difference]: Without dead ends: 669 [2021-12-21 10:19:12,570 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:12,570 INFO L933 BasicCegarLoop]: 553 mSDtfsCounter, 166 mSDsluCounter, 2989 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 3542 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:12,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 3542 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:12,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-12-21 10:19:12,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 649. [2021-12-21 10:19:12,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 541 states have (on average 1.3364140480591498) internal successors, (723), 548 states have internal predecessors, (723), 75 states have call successors, (75), 26 states have call predecessors, (75), 32 states have return successors, (92), 74 states have call predecessors, (92), 69 states have call successors, (92) [2021-12-21 10:19:12,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 890 transitions. [2021-12-21 10:19:12,597 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 890 transitions. Word has length 45 [2021-12-21 10:19:12,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:12,597 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 890 transitions. [2021-12-21 10:19:12,597 INFO L471 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) [2021-12-21 10:19:12,597 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 890 transitions. [2021-12-21 10:19:12,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-21 10:19:12,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:12,598 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:12,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-21 10:19:12,599 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:12,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:12,599 INFO L85 PathProgramCache]: Analyzing trace with hash -945301524, now seen corresponding path program 1 times [2021-12-21 10:19:12,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:12,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021890085] [2021-12-21 10:19:12,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:12,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:12,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:12,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:12,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:12,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:12,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:12,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:12,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:12,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021890085] [2021-12-21 10:19:12,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021890085] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:12,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:12,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 10:19:12,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75197229] [2021-12-21 10:19:12,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:12,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 10:19:12,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:12,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 10:19:12,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:19:12,697 INFO L87 Difference]: Start difference. First operand 649 states and 890 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) [2021-12-21 10:19:13,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:13,296 INFO L93 Difference]: Finished difference Result 684 states and 955 transitions. [2021-12-21 10:19:13,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 10:19:13,296 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 [2021-12-21 10:19:13,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:13,298 INFO L225 Difference]: With dead ends: 684 [2021-12-21 10:19:13,298 INFO L226 Difference]: Without dead ends: 666 [2021-12-21 10:19:13,299 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:13,299 INFO L933 BasicCegarLoop]: 544 mSDtfsCounter, 110 mSDsluCounter, 3773 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 4317 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:13,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 4317 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:19:13,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-12-21 10:19:13,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 646. [2021-12-21 10:19:13,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 539 states have (on average 1.3358070500927643) internal successors, (720), 546 states have internal predecessors, (720), 74 states have call successors, (74), 26 states have call predecessors, (74), 32 states have return successors, (91), 73 states have call predecessors, (91), 68 states have call successors, (91) [2021-12-21 10:19:13,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 885 transitions. [2021-12-21 10:19:13,325 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 885 transitions. Word has length 46 [2021-12-21 10:19:13,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:13,325 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 885 transitions. [2021-12-21 10:19:13,325 INFO L471 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) [2021-12-21 10:19:13,325 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 885 transitions. [2021-12-21 10:19:13,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-21 10:19:13,327 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:13,327 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:13,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-21 10:19:13,327 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:13,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:13,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1146484836, now seen corresponding path program 1 times [2021-12-21 10:19:13,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:13,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542549213] [2021-12-21 10:19:13,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:13,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:13,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:13,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:13,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:13,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 10:19:13,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:13,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:13,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542549213] [2021-12-21 10:19:13,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542549213] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:13,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:13,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 10:19:13,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954477104] [2021-12-21 10:19:13,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:13,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 10:19:13,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:13,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 10:19:13,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:19:13,383 INFO L87 Difference]: Start difference. First operand 646 states and 885 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) [2021-12-21 10:19:13,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:13,640 INFO L93 Difference]: Finished difference Result 703 states and 992 transitions. [2021-12-21 10:19:13,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 10:19:13,640 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 [2021-12-21 10:19:13,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:13,643 INFO L225 Difference]: With dead ends: 703 [2021-12-21 10:19:13,643 INFO L226 Difference]: Without dead ends: 676 [2021-12-21 10:19:13,643 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:13,643 INFO L933 BasicCegarLoop]: 532 mSDtfsCounter, 102 mSDsluCounter, 2161 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 2693 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:13,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 2693 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:13,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-12-21 10:19:13,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 650. [2021-12-21 10:19:13,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 541 states have (on average 1.33456561922366) internal successors, (722), 550 states have internal predecessors, (722), 74 states have call successors, (74), 26 states have call predecessors, (74), 34 states have return successors, (107), 73 states have call predecessors, (107), 68 states have call successors, (107) [2021-12-21 10:19:13,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 903 transitions. [2021-12-21 10:19:13,670 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 903 transitions. Word has length 46 [2021-12-21 10:19:13,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:13,671 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 903 transitions. [2021-12-21 10:19:13,671 INFO L471 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) [2021-12-21 10:19:13,671 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 903 transitions. [2021-12-21 10:19:13,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-21 10:19:13,672 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:13,672 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:13,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-21 10:19:13,672 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:13,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:13,673 INFO L85 PathProgramCache]: Analyzing trace with hash -876237255, now seen corresponding path program 1 times [2021-12-21 10:19:13,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:13,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639168546] [2021-12-21 10:19:13,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:13,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:13,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:13,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:13,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:13,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:13,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:13,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639168546] [2021-12-21 10:19:13,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639168546] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:13,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:13,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-21 10:19:13,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359537022] [2021-12-21 10:19:13,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:13,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 10:19:13,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:13,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 10:19:13,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:19:13,789 INFO L87 Difference]: Start difference. First operand 650 states and 903 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) [2021-12-21 10:19:14,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:14,483 INFO L93 Difference]: Finished difference Result 685 states and 968 transitions. [2021-12-21 10:19:14,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 10:19:14,483 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 [2021-12-21 10:19:14,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:14,488 INFO L225 Difference]: With dead ends: 685 [2021-12-21 10:19:14,488 INFO L226 Difference]: Without dead ends: 667 [2021-12-21 10:19:14,488 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:14,489 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 123 mSDsluCounter, 4152 mSDsCounter, 0 mSdLazyCounter, 1348 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 4690 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:14,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 4690 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1348 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:19:14,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-12-21 10:19:14,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 647. [2021-12-21 10:19:14,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 539 states have (on average 1.3339517625231911) internal successors, (719), 548 states have internal predecessors, (719), 73 states have call successors, (73), 26 states have call predecessors, (73), 34 states have return successors, (106), 72 states have call predecessors, (106), 67 states have call successors, (106) [2021-12-21 10:19:14,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 898 transitions. [2021-12-21 10:19:14,514 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 898 transitions. Word has length 47 [2021-12-21 10:19:14,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:14,515 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 898 transitions. [2021-12-21 10:19:14,515 INFO L471 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) [2021-12-21 10:19:14,515 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 898 transitions. [2021-12-21 10:19:14,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-21 10:19:14,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:14,516 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 10:19:14,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-21 10:19:14,517 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:14,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:14,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1600404883, now seen corresponding path program 1 times [2021-12-21 10:19:14,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:14,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58765945] [2021-12-21 10:19:14,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:14,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:14,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:14,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 10:19:14,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:14,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-21 10:19:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:14,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:14,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 10:19:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:14,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:14,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:14,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58765945] [2021-12-21 10:19:14,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58765945] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:14,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:14,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 10:19:14,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289885067] [2021-12-21 10:19:14,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:14,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 10:19:14,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:14,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 10:19:14,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:19:14,567 INFO L87 Difference]: Start difference. First operand 647 states and 898 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 10:19:15,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:15,010 INFO L93 Difference]: Finished difference Result 1017 states and 1421 transitions. [2021-12-21 10:19:15,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 10:19:15,010 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 63 [2021-12-21 10:19:15,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:15,012 INFO L225 Difference]: With dead ends: 1017 [2021-12-21 10:19:15,012 INFO L226 Difference]: Without dead ends: 647 [2021-12-21 10:19:15,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:19:15,014 INFO L933 BasicCegarLoop]: 463 mSDtfsCounter, 862 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 1397 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:15,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [882 Valid, 1397 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:19:15,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-12-21 10:19:15,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2021-12-21 10:19:15,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 539 states have (on average 1.3265306122448979) internal successors, (715), 548 states have internal predecessors, (715), 73 states have call successors, (73), 26 states have call predecessors, (73), 34 states have return successors, (101), 72 states have call predecessors, (101), 67 states have call successors, (101) [2021-12-21 10:19:15,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 889 transitions. [2021-12-21 10:19:15,049 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 889 transitions. Word has length 63 [2021-12-21 10:19:15,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:15,049 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 889 transitions. [2021-12-21 10:19:15,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 10:19:15,050 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 889 transitions. [2021-12-21 10:19:15,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-21 10:19:15,051 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:15,051 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:15,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-21 10:19:15,052 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:15,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:15,052 INFO L85 PathProgramCache]: Analyzing trace with hash -816949344, now seen corresponding path program 1 times [2021-12-21 10:19:15,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:15,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490252300] [2021-12-21 10:19:15,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:15,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:15,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:15,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 10:19:15,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:15,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 10:19:15,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:15,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:15,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:15,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 10:19:15,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:15,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:15,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:15,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490252300] [2021-12-21 10:19:15,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490252300] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:19:15,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643476081] [2021-12-21 10:19:15,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:15,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:19:15,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:19:15,104 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) [2021-12-21 10:19:15,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 10:19:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:15,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 10:19:15,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:19:15,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:15,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:19:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:15,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643476081] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 10:19:15,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 10:19:15,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2021-12-21 10:19:15,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518091941] [2021-12-21 10:19:15,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:15,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 10:19:15,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:15,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 10:19:15,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:19:15,719 INFO L87 Difference]: Start difference. First operand 647 states and 889 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 10:19:15,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:15,973 INFO L93 Difference]: Finished difference Result 935 states and 1273 transitions. [2021-12-21 10:19:15,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 10:19:15,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 64 [2021-12-21 10:19:15,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:15,976 INFO L225 Difference]: With dead ends: 935 [2021-12-21 10:19:15,976 INFO L226 Difference]: Without dead ends: 784 [2021-12-21 10:19:15,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-21 10:19:15,977 INFO L933 BasicCegarLoop]: 565 mSDtfsCounter, 670 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 1337 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:15,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [674 Valid, 1337 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:15,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-12-21 10:19:16,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 685. [2021-12-21 10:19:16,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 570 states have (on average 1.3263157894736841) internal successors, (756), 579 states have internal predecessors, (756), 76 states have call successors, (76), 28 states have call predecessors, (76), 38 states have return successors, (107), 77 states have call predecessors, (107), 70 states have call successors, (107) [2021-12-21 10:19:16,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 939 transitions. [2021-12-21 10:19:16,009 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 939 transitions. Word has length 64 [2021-12-21 10:19:16,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:16,009 INFO L470 AbstractCegarLoop]: Abstraction has 685 states and 939 transitions. [2021-12-21 10:19:16,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 10:19:16,009 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 939 transitions. [2021-12-21 10:19:16,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-21 10:19:16,011 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:16,011 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:16,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 10:19:16,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-21 10:19:16,227 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:16,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:16,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1640527845, now seen corresponding path program 1 times [2021-12-21 10:19:16,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:16,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054486489] [2021-12-21 10:19:16,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:16,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:16,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 10:19:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:16,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:16,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:16,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:16,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054486489] [2021-12-21 10:19:16,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054486489] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:16,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:16,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-21 10:19:16,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587970798] [2021-12-21 10:19:16,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:16,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 10:19:16,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:16,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 10:19:16,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-21 10:19:16,319 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) [2021-12-21 10:19:16,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:16,939 INFO L93 Difference]: Finished difference Result 703 states and 957 transitions. [2021-12-21 10:19:16,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 10:19:16,940 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 [2021-12-21 10:19:16,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:16,942 INFO L225 Difference]: With dead ends: 703 [2021-12-21 10:19:16,942 INFO L226 Difference]: Without dead ends: 683 [2021-12-21 10:19:16,943 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:16,943 INFO L933 BasicCegarLoop]: 499 mSDtfsCounter, 239 mSDsluCounter, 4090 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 4589 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:16,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 4589 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:19:16,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-12-21 10:19:16,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 683. [2021-12-21 10:19:16,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 569 states have (on average 1.3251318101933216) internal successors, (754), 578 states have internal predecessors, (754), 75 states have call successors, (75), 28 states have call predecessors, (75), 38 states have return successors, (106), 76 states have call predecessors, (106), 69 states have call successors, (106) [2021-12-21 10:19:16,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 935 transitions. [2021-12-21 10:19:16,976 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 935 transitions. Word has length 48 [2021-12-21 10:19:16,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:16,977 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 935 transitions. [2021-12-21 10:19:16,977 INFO L471 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) [2021-12-21 10:19:16,977 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 935 transitions. [2021-12-21 10:19:16,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-21 10:19:16,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:16,978 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:16,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-21 10:19:16,979 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:16,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:16,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1335817887, now seen corresponding path program 1 times [2021-12-21 10:19:16,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:16,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574608440] [2021-12-21 10:19:16,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:16,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:16,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:16,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:16,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:17,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 10:19:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:17,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:17,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:17,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574608440] [2021-12-21 10:19:17,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574608440] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:17,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:17,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 10:19:17,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400401612] [2021-12-21 10:19:17,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:17,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 10:19:17,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:17,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 10:19:17,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:17,012 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) [2021-12-21 10:19:17,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:17,239 INFO L93 Difference]: Finished difference Result 919 states and 1254 transitions. [2021-12-21 10:19:17,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 10:19:17,239 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 [2021-12-21 10:19:17,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:17,241 INFO L225 Difference]: With dead ends: 919 [2021-12-21 10:19:17,241 INFO L226 Difference]: Without dead ends: 641 [2021-12-21 10:19:17,242 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:17,242 INFO L933 BasicCegarLoop]: 496 mSDtfsCounter, 99 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 1594 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:17,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 1594 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:17,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-12-21 10:19:17,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 606. [2021-12-21 10:19:17,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 509 states have (on average 1.3143418467583496) internal successors, (669), 517 states have internal predecessors, (669), 65 states have call successors, (65), 25 states have call predecessors, (65), 31 states have return successors, (73), 63 states have call predecessors, (73), 59 states have call successors, (73) [2021-12-21 10:19:17,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 807 transitions. [2021-12-21 10:19:17,281 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 807 transitions. Word has length 48 [2021-12-21 10:19:17,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:17,282 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 807 transitions. [2021-12-21 10:19:17,282 INFO L471 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) [2021-12-21 10:19:17,282 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 807 transitions. [2021-12-21 10:19:17,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-21 10:19:17,283 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:17,283 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:17,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-21 10:19:17,284 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:17,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:17,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1170302788, now seen corresponding path program 1 times [2021-12-21 10:19:17,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:17,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005048474] [2021-12-21 10:19:17,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:17,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:17,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 10:19:17,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:17,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:17,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:17,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:17,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005048474] [2021-12-21 10:19:17,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005048474] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:17,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:17,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-21 10:19:17,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549457731] [2021-12-21 10:19:17,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:17,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 10:19:17,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:17,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 10:19:17,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:19:17,416 INFO L87 Difference]: Start difference. First operand 606 states and 807 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) [2021-12-21 10:19:18,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:18,017 INFO L93 Difference]: Finished difference Result 621 states and 822 transitions. [2021-12-21 10:19:18,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 10:19:18,017 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 [2021-12-21 10:19:18,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:18,020 INFO L225 Difference]: With dead ends: 621 [2021-12-21 10:19:18,020 INFO L226 Difference]: Without dead ends: 597 [2021-12-21 10:19:18,020 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:18,020 INFO L933 BasicCegarLoop]: 501 mSDtfsCounter, 118 mSDsluCounter, 3884 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 4385 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:18,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 4385 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1230 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:19:18,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-12-21 10:19:18,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 597. [2021-12-21 10:19:18,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 502 states have (on average 1.3147410358565736) internal successors, (660), 510 states have internal predecessors, (660), 63 states have call successors, (63), 25 states have call predecessors, (63), 31 states have return successors, (71), 61 states have call predecessors, (71), 57 states have call successors, (71) [2021-12-21 10:19:18,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 794 transitions. [2021-12-21 10:19:18,047 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 794 transitions. Word has length 54 [2021-12-21 10:19:18,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:18,047 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 794 transitions. [2021-12-21 10:19:18,047 INFO L471 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) [2021-12-21 10:19:18,047 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 794 transitions. [2021-12-21 10:19:18,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-21 10:19:18,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:18,048 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:18,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-21 10:19:18,049 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:18,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:18,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1066234985, now seen corresponding path program 1 times [2021-12-21 10:19:18,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:18,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401816705] [2021-12-21 10:19:18,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:18,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:18,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 10:19:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:18,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:18,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:18,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:18,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401816705] [2021-12-21 10:19:18,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401816705] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:18,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:18,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-21 10:19:18,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246713594] [2021-12-21 10:19:18,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:18,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 10:19:18,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:18,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 10:19:18,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:19:18,164 INFO L87 Difference]: Start difference. First operand 597 states and 794 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) [2021-12-21 10:19:18,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:18,766 INFO L93 Difference]: Finished difference Result 612 states and 809 transitions. [2021-12-21 10:19:18,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 10:19:18,766 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 [2021-12-21 10:19:18,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:18,768 INFO L225 Difference]: With dead ends: 612 [2021-12-21 10:19:18,768 INFO L226 Difference]: Without dead ends: 594 [2021-12-21 10:19:18,769 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:18,769 INFO L933 BasicCegarLoop]: 476 mSDtfsCounter, 118 mSDsluCounter, 3715 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 4191 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:18,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 4191 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:19:18,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-12-21 10:19:18,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 594. [2021-12-21 10:19:18,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 500 states have (on average 1.314) internal successors, (657), 508 states have internal predecessors, (657), 62 states have call successors, (62), 25 states have call predecessors, (62), 31 states have return successors, (70), 60 states have call predecessors, (70), 56 states have call successors, (70) [2021-12-21 10:19:18,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 789 transitions. [2021-12-21 10:19:18,795 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 789 transitions. Word has length 48 [2021-12-21 10:19:18,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:18,795 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 789 transitions. [2021-12-21 10:19:18,795 INFO L471 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) [2021-12-21 10:19:18,795 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 789 transitions. [2021-12-21 10:19:18,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-21 10:19:18,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:18,797 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:18,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-21 10:19:18,797 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:18,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:18,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1131207190, now seen corresponding path program 1 times [2021-12-21 10:19:18,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:18,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452541197] [2021-12-21 10:19:18,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:18,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:18,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:18,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 10:19:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:18,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 10:19:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:18,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:18,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:18,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:18,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:18,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452541197] [2021-12-21 10:19:18,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452541197] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:18,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:18,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-21 10:19:18,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802138119] [2021-12-21 10:19:18,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:18,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 10:19:18,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:18,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 10:19:18,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:19:18,892 INFO L87 Difference]: Start difference. First operand 594 states and 789 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) [2021-12-21 10:19:19,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:19,489 INFO L93 Difference]: Finished difference Result 628 states and 824 transitions. [2021-12-21 10:19:19,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 10:19:19,489 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 [2021-12-21 10:19:19,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:19,491 INFO L225 Difference]: With dead ends: 628 [2021-12-21 10:19:19,491 INFO L226 Difference]: Without dead ends: 608 [2021-12-21 10:19:19,491 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:19,491 INFO L933 BasicCegarLoop]: 462 mSDtfsCounter, 256 mSDsluCounter, 4029 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 4491 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:19,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 4491 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1164 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:19:19,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-12-21 10:19:19,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 592. [2021-12-21 10:19:19,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 499 states have (on average 1.312625250501002) internal successors, (655), 507 states have internal predecessors, (655), 61 states have call successors, (61), 25 states have call predecessors, (61), 31 states have return successors, (69), 59 states have call predecessors, (69), 55 states have call successors, (69) [2021-12-21 10:19:19,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 785 transitions. [2021-12-21 10:19:19,525 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 785 transitions. Word has length 51 [2021-12-21 10:19:19,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:19,525 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 785 transitions. [2021-12-21 10:19:19,525 INFO L471 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) [2021-12-21 10:19:19,525 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 785 transitions. [2021-12-21 10:19:19,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-21 10:19:19,527 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:19,527 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:19,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-21 10:19:19,527 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:19,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:19,527 INFO L85 PathProgramCache]: Analyzing trace with hash -480998912, now seen corresponding path program 1 times [2021-12-21 10:19:19,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:19,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942214007] [2021-12-21 10:19:19,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:19,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:19,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 10:19:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:19,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-21 10:19:19,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:19,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:19,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:19,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942214007] [2021-12-21 10:19:19,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942214007] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:19,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:19,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 10:19:19,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282393585] [2021-12-21 10:19:19,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:19,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 10:19:19,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:19,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 10:19:19,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:19:19,564 INFO L87 Difference]: Start difference. First operand 592 states and 785 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) [2021-12-21 10:19:19,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:19,851 INFO L93 Difference]: Finished difference Result 674 states and 879 transitions. [2021-12-21 10:19:19,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 10:19:19,851 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 [2021-12-21 10:19:19,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:19,853 INFO L225 Difference]: With dead ends: 674 [2021-12-21 10:19:19,853 INFO L226 Difference]: Without dead ends: 648 [2021-12-21 10:19:19,853 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:19,854 INFO L933 BasicCegarLoop]: 510 mSDtfsCounter, 267 mSDsluCounter, 1858 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 2368 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:19,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 2368 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:19,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-12-21 10:19:19,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 598. [2021-12-21 10:19:19,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 504 states have (on average 1.3115079365079365) internal successors, (661), 512 states have internal predecessors, (661), 62 states have call successors, (62), 25 states have call predecessors, (62), 31 states have return successors, (70), 60 states have call predecessors, (70), 56 states have call successors, (70) [2021-12-21 10:19:19,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 793 transitions. [2021-12-21 10:19:19,880 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 793 transitions. Word has length 50 [2021-12-21 10:19:19,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:19,880 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 793 transitions. [2021-12-21 10:19:19,880 INFO L471 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) [2021-12-21 10:19:19,880 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 793 transitions. [2021-12-21 10:19:19,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-21 10:19:19,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:19,881 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:19,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-21 10:19:19,881 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:19,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:19,882 INFO L85 PathProgramCache]: Analyzing trace with hash 266979750, now seen corresponding path program 1 times [2021-12-21 10:19:19,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:19,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342290941] [2021-12-21 10:19:19,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:19,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:19,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:19,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 10:19:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:19,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:19,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:19,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 10:19:19,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:19,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:19,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342290941] [2021-12-21 10:19:19,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342290941] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:19,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:19,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 10:19:19,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359476091] [2021-12-21 10:19:19,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:19,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 10:19:19,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:19,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 10:19:19,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:19:19,984 INFO L87 Difference]: Start difference. First operand 598 states and 793 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) [2021-12-21 10:19:20,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:20,305 INFO L93 Difference]: Finished difference Result 703 states and 934 transitions. [2021-12-21 10:19:20,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 10:19:20,305 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 [2021-12-21 10:19:20,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:20,307 INFO L225 Difference]: With dead ends: 703 [2021-12-21 10:19:20,307 INFO L226 Difference]: Without dead ends: 598 [2021-12-21 10:19:20,308 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:20,310 INFO L933 BasicCegarLoop]: 463 mSDtfsCounter, 113 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1458 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:20,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 1458 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:19:20,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-12-21 10:19:20,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2021-12-21 10:19:20,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 504 states have (on average 1.3055555555555556) internal successors, (658), 512 states have internal predecessors, (658), 62 states have call successors, (62), 25 states have call predecessors, (62), 31 states have return successors, (70), 60 states have call predecessors, (70), 56 states have call successors, (70) [2021-12-21 10:19:20,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 790 transitions. [2021-12-21 10:19:20,339 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 790 transitions. Word has length 53 [2021-12-21 10:19:20,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:20,340 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 790 transitions. [2021-12-21 10:19:20,340 INFO L471 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) [2021-12-21 10:19:20,340 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 790 transitions. [2021-12-21 10:19:20,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-21 10:19:20,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:20,341 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:20,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-21 10:19:20,342 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:20,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:20,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1095084481, now seen corresponding path program 1 times [2021-12-21 10:19:20,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:20,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654423859] [2021-12-21 10:19:20,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:20,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:20,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:20,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:20,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 10:19:20,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:20,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:20,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:20,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:20,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:20,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654423859] [2021-12-21 10:19:20,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654423859] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:20,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:20,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-21 10:19:20,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301799653] [2021-12-21 10:19:20,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:20,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 10:19:20,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:20,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 10:19:20,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:19:20,457 INFO L87 Difference]: Start difference. First operand 598 states and 790 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) [2021-12-21 10:19:21,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:21,001 INFO L93 Difference]: Finished difference Result 616 states and 808 transitions. [2021-12-21 10:19:21,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 10:19:21,001 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 [2021-12-21 10:19:21,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:21,003 INFO L225 Difference]: With dead ends: 616 [2021-12-21 10:19:21,004 INFO L226 Difference]: Without dead ends: 596 [2021-12-21 10:19:21,004 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:21,005 INFO L933 BasicCegarLoop]: 470 mSDtfsCounter, 256 mSDsluCounter, 3718 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 4188 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:21,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 4188 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:19:21,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-12-21 10:19:21,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2021-12-21 10:19:21,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 503 states have (on average 1.3041749502982107) internal successors, (656), 511 states have internal predecessors, (656), 61 states have call successors, (61), 25 states have call predecessors, (61), 31 states have return successors, (69), 59 states have call predecessors, (69), 55 states have call successors, (69) [2021-12-21 10:19:21,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 786 transitions. [2021-12-21 10:19:21,034 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 786 transitions. Word has length 52 [2021-12-21 10:19:21,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:21,034 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 786 transitions. [2021-12-21 10:19:21,034 INFO L471 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) [2021-12-21 10:19:21,035 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 786 transitions. [2021-12-21 10:19:21,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-21 10:19:21,036 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:21,036 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:21,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-21 10:19:21,036 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:21,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:21,037 INFO L85 PathProgramCache]: Analyzing trace with hash 309046761, now seen corresponding path program 1 times [2021-12-21 10:19:21,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:21,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875600084] [2021-12-21 10:19:21,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:21,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:21,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:21,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 10:19:21,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:21,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 10:19:21,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:21,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:21,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:21,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875600084] [2021-12-21 10:19:21,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875600084] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:21,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:21,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 10:19:21,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373899720] [2021-12-21 10:19:21,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:21,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 10:19:21,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:21,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 10:19:21,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:19:21,094 INFO L87 Difference]: Start difference. First operand 596 states and 786 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) [2021-12-21 10:19:21,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:21,454 INFO L93 Difference]: Finished difference Result 630 states and 826 transitions. [2021-12-21 10:19:21,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 10:19:21,455 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 [2021-12-21 10:19:21,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:21,457 INFO L225 Difference]: With dead ends: 630 [2021-12-21 10:19:21,457 INFO L226 Difference]: Without dead ends: 576 [2021-12-21 10:19:21,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-12-21 10:19:21,458 INFO L933 BasicCegarLoop]: 469 mSDtfsCounter, 266 mSDsluCounter, 2318 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 2787 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:21,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 2787 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:19:21,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-12-21 10:19:21,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 569. [2021-12-21 10:19:21,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 481 states have (on average 1.288981288981289) internal successors, (620), 489 states have internal predecessors, (620), 56 states have call successors, (56), 25 states have call predecessors, (56), 31 states have return successors, (63), 54 states have call predecessors, (63), 50 states have call successors, (63) [2021-12-21 10:19:21,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 739 transitions. [2021-12-21 10:19:21,490 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 739 transitions. Word has length 51 [2021-12-21 10:19:21,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:21,491 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 739 transitions. [2021-12-21 10:19:21,491 INFO L471 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) [2021-12-21 10:19:21,491 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 739 transitions. [2021-12-21 10:19:21,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-21 10:19:21,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:21,492 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:21,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-21 10:19:21,493 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:21,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:21,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1614181273, now seen corresponding path program 1 times [2021-12-21 10:19:21,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:21,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684216946] [2021-12-21 10:19:21,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:21,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:21,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:21,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 10:19:21,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:21,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 10:19:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:21,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:21,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:21,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684216946] [2021-12-21 10:19:21,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684216946] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:21,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:21,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 10:19:21,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479111672] [2021-12-21 10:19:21,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:21,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 10:19:21,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:21,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 10:19:21,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:19:21,534 INFO L87 Difference]: Start difference. First operand 569 states and 739 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) [2021-12-21 10:19:21,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:21,761 INFO L93 Difference]: Finished difference Result 610 states and 781 transitions. [2021-12-21 10:19:21,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 10:19:21,762 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 [2021-12-21 10:19:21,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:21,763 INFO L225 Difference]: With dead ends: 610 [2021-12-21 10:19:21,763 INFO L226 Difference]: Without dead ends: 563 [2021-12-21 10:19:21,764 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:21,764 INFO L933 BasicCegarLoop]: 412 mSDtfsCounter, 179 mSDsluCounter, 1348 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1760 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:21,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 1760 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:21,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-12-21 10:19:21,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 559. [2021-12-21 10:19:21,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 473 states have (on average 1.285412262156448) internal successors, (608), 481 states have internal predecessors, (608), 54 states have call successors, (54), 25 states have call predecessors, (54), 31 states have return successors, (61), 52 states have call predecessors, (61), 48 states have call successors, (61) [2021-12-21 10:19:21,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 723 transitions. [2021-12-21 10:19:21,788 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 723 transitions. Word has length 51 [2021-12-21 10:19:21,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:21,789 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 723 transitions. [2021-12-21 10:19:21,789 INFO L471 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) [2021-12-21 10:19:21,789 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 723 transitions. [2021-12-21 10:19:21,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-21 10:19:21,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:21,790 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:21,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-21 10:19:21,790 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:21,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:21,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1624287433, now seen corresponding path program 1 times [2021-12-21 10:19:21,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:21,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065745807] [2021-12-21 10:19:21,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:21,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:21,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:21,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 10:19:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:21,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 10:19:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:21,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:21,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065745807] [2021-12-21 10:19:21,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065745807] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:21,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:21,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 10:19:21,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534413408] [2021-12-21 10:19:21,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:21,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 10:19:21,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:21,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 10:19:21,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:19:21,830 INFO L87 Difference]: Start difference. First operand 559 states and 723 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) [2021-12-21 10:19:22,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:22,058 INFO L93 Difference]: Finished difference Result 586 states and 751 transitions. [2021-12-21 10:19:22,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 10:19:22,058 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 [2021-12-21 10:19:22,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:22,059 INFO L225 Difference]: With dead ends: 586 [2021-12-21 10:19:22,059 INFO L226 Difference]: Without dead ends: 554 [2021-12-21 10:19:22,060 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:22,060 INFO L933 BasicCegarLoop]: 412 mSDtfsCounter, 96 mSDsluCounter, 1597 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 2009 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:22,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 2009 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:22,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-12-21 10:19:22,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2021-12-21 10:19:22,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 469 states have (on average 1.2857142857142858) internal successors, (603), 477 states have internal predecessors, (603), 53 states have call successors, (53), 25 states have call predecessors, (53), 31 states have return successors, (60), 51 states have call predecessors, (60), 47 states have call successors, (60) [2021-12-21 10:19:22,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 716 transitions. [2021-12-21 10:19:22,093 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 716 transitions. Word has length 52 [2021-12-21 10:19:22,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:22,093 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 716 transitions. [2021-12-21 10:19:22,093 INFO L471 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) [2021-12-21 10:19:22,093 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 716 transitions. [2021-12-21 10:19:22,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-21 10:19:22,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:22,096 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:22,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-21 10:19:22,096 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:22,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:22,097 INFO L85 PathProgramCache]: Analyzing trace with hash 576638373, now seen corresponding path program 1 times [2021-12-21 10:19:22,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:22,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104807838] [2021-12-21 10:19:22,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:22,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 10:19:22,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:22,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:22,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:22,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104807838] [2021-12-21 10:19:22,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104807838] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:22,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:22,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 10:19:22,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318607651] [2021-12-21 10:19:22,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:22,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 10:19:22,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:22,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 10:19:22,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:22,133 INFO L87 Difference]: Start difference. First operand 554 states and 716 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) [2021-12-21 10:19:22,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:22,398 INFO L93 Difference]: Finished difference Result 653 states and 844 transitions. [2021-12-21 10:19:22,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 10:19:22,398 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 [2021-12-21 10:19:22,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:22,400 INFO L225 Difference]: With dead ends: 653 [2021-12-21 10:19:22,400 INFO L226 Difference]: Without dead ends: 641 [2021-12-21 10:19:22,400 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:22,400 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 216 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:22,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 1241 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:22,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-12-21 10:19:22,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 586. [2021-12-21 10:19:22,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 499 states have (on average 1.280561122244489) internal successors, (639), 507 states have internal predecessors, (639), 53 states have call successors, (53), 25 states have call predecessors, (53), 33 states have return successors, (62), 53 states have call predecessors, (62), 47 states have call successors, (62) [2021-12-21 10:19:22,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 754 transitions. [2021-12-21 10:19:22,428 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 754 transitions. Word has length 52 [2021-12-21 10:19:22,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:22,428 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 754 transitions. [2021-12-21 10:19:22,428 INFO L471 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) [2021-12-21 10:19:22,428 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 754 transitions. [2021-12-21 10:19:22,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 10:19:22,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:22,429 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:22,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-21 10:19:22,430 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:22,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:22,430 INFO L85 PathProgramCache]: Analyzing trace with hash 2037022253, now seen corresponding path program 1 times [2021-12-21 10:19:22,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:22,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680348935] [2021-12-21 10:19:22,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:22,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:22,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 10:19:22,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:22,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 10:19:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 10:19:22,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:22,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:22,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680348935] [2021-12-21 10:19:22,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680348935] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:22,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:22,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 10:19:22,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412601364] [2021-12-21 10:19:22,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:22,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 10:19:22,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:22,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 10:19:22,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:19:22,477 INFO L87 Difference]: Start difference. First operand 586 states and 754 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 10:19:22,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:22,722 INFO L93 Difference]: Finished difference Result 716 states and 919 transitions. [2021-12-21 10:19:22,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 10:19:22,731 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2021-12-21 10:19:22,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:22,733 INFO L225 Difference]: With dead ends: 716 [2021-12-21 10:19:22,733 INFO L226 Difference]: Without dead ends: 643 [2021-12-21 10:19:22,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-21 10:19:22,733 INFO L933 BasicCegarLoop]: 450 mSDtfsCounter, 417 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:22,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 1309 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:22,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-12-21 10:19:22,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 626. [2021-12-21 10:19:22,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 533 states have (on average 1.2870544090056286) internal successors, (686), 540 states have internal predecessors, (686), 55 states have call successors, (55), 28 states have call predecessors, (55), 37 states have return successors, (67), 57 states have call predecessors, (67), 50 states have call successors, (67) [2021-12-21 10:19:22,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 808 transitions. [2021-12-21 10:19:22,761 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 808 transitions. Word has length 56 [2021-12-21 10:19:22,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:22,762 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 808 transitions. [2021-12-21 10:19:22,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 10:19:22,762 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 808 transitions. [2021-12-21 10:19:22,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-21 10:19:22,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:22,763 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:22,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-21 10:19:22,763 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:22,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:22,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1140697567, now seen corresponding path program 1 times [2021-12-21 10:19:22,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:22,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900673079] [2021-12-21 10:19:22,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:22,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 10:19:22,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:22,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:22,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900673079] [2021-12-21 10:19:22,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900673079] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:22,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:22,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 10:19:22,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199215112] [2021-12-21 10:19:22,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:22,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 10:19:22,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:22,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 10:19:22,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:19:22,809 INFO L87 Difference]: Start difference. First operand 626 states and 808 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) [2021-12-21 10:19:23,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:23,225 INFO L93 Difference]: Finished difference Result 687 states and 887 transitions. [2021-12-21 10:19:23,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 10:19:23,225 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 [2021-12-21 10:19:23,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:23,226 INFO L225 Difference]: With dead ends: 687 [2021-12-21 10:19:23,226 INFO L226 Difference]: Without dead ends: 678 [2021-12-21 10:19:23,227 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:23,227 INFO L933 BasicCegarLoop]: 408 mSDtfsCounter, 759 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 1404 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:23,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [794 Valid, 1404 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:19:23,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-12-21 10:19:23,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 626. [2021-12-21 10:19:23,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 533 states have (on average 1.2833020637898687) internal successors, (684), 540 states have internal predecessors, (684), 55 states have call successors, (55), 28 states have call predecessors, (55), 37 states have return successors, (67), 57 states have call predecessors, (67), 50 states have call successors, (67) [2021-12-21 10:19:23,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 806 transitions. [2021-12-21 10:19:23,258 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 806 transitions. Word has length 53 [2021-12-21 10:19:23,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:23,258 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 806 transitions. [2021-12-21 10:19:23,258 INFO L471 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) [2021-12-21 10:19:23,258 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 806 transitions. [2021-12-21 10:19:23,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-21 10:19:23,259 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:23,259 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:23,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-21 10:19:23,259 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:23,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:23,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1949554969, now seen corresponding path program 1 times [2021-12-21 10:19:23,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:23,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475693759] [2021-12-21 10:19:23,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:23,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:23,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:23,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 10:19:23,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:23,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 10:19:23,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:23,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 10:19:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:23,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:23,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:23,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475693759] [2021-12-21 10:19:23,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475693759] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:23,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:23,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-21 10:19:23,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993546593] [2021-12-21 10:19:23,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:23,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 10:19:23,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:23,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 10:19:23,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:19:23,349 INFO L87 Difference]: Start difference. First operand 626 states and 806 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) [2021-12-21 10:19:23,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:23,922 INFO L93 Difference]: Finished difference Result 669 states and 855 transitions. [2021-12-21 10:19:23,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 10:19:23,922 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 [2021-12-21 10:19:23,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:23,924 INFO L225 Difference]: With dead ends: 669 [2021-12-21 10:19:23,924 INFO L226 Difference]: Without dead ends: 649 [2021-12-21 10:19:23,924 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:23,924 INFO L933 BasicCegarLoop]: 428 mSDtfsCounter, 243 mSDsluCounter, 3880 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 4308 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:23,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 4308 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:19:23,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-12-21 10:19:23,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 624. [2021-12-21 10:19:23,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 532 states have (on average 1.281954887218045) internal successors, (682), 539 states have internal predecessors, (682), 54 states have call successors, (54), 28 states have call predecessors, (54), 37 states have return successors, (66), 56 states have call predecessors, (66), 49 states have call successors, (66) [2021-12-21 10:19:23,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 802 transitions. [2021-12-21 10:19:23,962 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 802 transitions. Word has length 59 [2021-12-21 10:19:23,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:23,962 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 802 transitions. [2021-12-21 10:19:23,962 INFO L471 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) [2021-12-21 10:19:23,962 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 802 transitions. [2021-12-21 10:19:23,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-21 10:19:23,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:23,963 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:23,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-12-21 10:19:23,963 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:23,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:23,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1478759627, now seen corresponding path program 1 times [2021-12-21 10:19:23,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:23,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634221769] [2021-12-21 10:19:23,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:23,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:23,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:24,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 10:19:24,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:24,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 10:19:24,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:24,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:24,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:24,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:24,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634221769] [2021-12-21 10:19:24,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634221769] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:24,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:24,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-21 10:19:24,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411742772] [2021-12-21 10:19:24,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:24,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 10:19:24,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:24,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 10:19:24,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-12-21 10:19:24,098 INFO L87 Difference]: Start difference. First operand 624 states and 802 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) [2021-12-21 10:19:24,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:24,719 INFO L93 Difference]: Finished difference Result 644 states and 823 transitions. [2021-12-21 10:19:24,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 10:19:24,719 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 [2021-12-21 10:19:24,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:24,721 INFO L225 Difference]: With dead ends: 644 [2021-12-21 10:19:24,721 INFO L226 Difference]: Without dead ends: 620 [2021-12-21 10:19:24,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-12-21 10:19:24,722 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 232 mSDsluCounter, 4314 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 4718 SdHoareTripleChecker+Invalid, 1523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:24,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 4718 Invalid, 1523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1425 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:19:24,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-12-21 10:19:24,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 620. [2021-12-21 10:19:24,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 529 states have (on average 1.281663516068053) internal successors, (678), 536 states have internal predecessors, (678), 53 states have call successors, (53), 28 states have call predecessors, (53), 37 states have return successors, (65), 55 states have call predecessors, (65), 48 states have call successors, (65) [2021-12-21 10:19:24,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 796 transitions. [2021-12-21 10:19:24,753 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 796 transitions. Word has length 55 [2021-12-21 10:19:24,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:24,753 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 796 transitions. [2021-12-21 10:19:24,753 INFO L471 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) [2021-12-21 10:19:24,753 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 796 transitions. [2021-12-21 10:19:24,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-21 10:19:24,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:24,754 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:24,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-12-21 10:19:24,755 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:24,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:24,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1059320829, now seen corresponding path program 1 times [2021-12-21 10:19:24,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:24,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162881915] [2021-12-21 10:19:24,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:24,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:24,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-21 10:19:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:24,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 10:19:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:24,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:24,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:24,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162881915] [2021-12-21 10:19:24,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162881915] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:24,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:24,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 10:19:24,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959056699] [2021-12-21 10:19:24,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:24,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 10:19:24,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:24,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 10:19:24,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:19:24,812 INFO L87 Difference]: Start difference. First operand 620 states and 796 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) [2021-12-21 10:19:25,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:25,020 INFO L93 Difference]: Finished difference Result 647 states and 824 transitions. [2021-12-21 10:19:25,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 10:19:25,021 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 [2021-12-21 10:19:25,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:25,022 INFO L225 Difference]: With dead ends: 647 [2021-12-21 10:19:25,022 INFO L226 Difference]: Without dead ends: 615 [2021-12-21 10:19:25,022 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:25,022 INFO L933 BasicCegarLoop]: 394 mSDtfsCounter, 171 mSDsluCounter, 1288 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 1682 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:25,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 1682 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:25,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-12-21 10:19:25,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 615. [2021-12-21 10:19:25,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 525 states have (on average 1.2819047619047619) internal successors, (673), 532 states have internal predecessors, (673), 52 states have call successors, (52), 28 states have call predecessors, (52), 37 states have return successors, (64), 54 states have call predecessors, (64), 47 states have call successors, (64) [2021-12-21 10:19:25,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 789 transitions. [2021-12-21 10:19:25,052 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 789 transitions. Word has length 54 [2021-12-21 10:19:25,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:25,052 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 789 transitions. [2021-12-21 10:19:25,052 INFO L471 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) [2021-12-21 10:19:25,052 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 789 transitions. [2021-12-21 10:19:25,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-21 10:19:25,053 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:25,054 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:25,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-12-21 10:19:25,054 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:25,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:25,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1513227889, now seen corresponding path program 1 times [2021-12-21 10:19:25,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:25,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271541156] [2021-12-21 10:19:25,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:25,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:25,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:25,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 10:19:25,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:25,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 10:19:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:25,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:25,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:25,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271541156] [2021-12-21 10:19:25,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271541156] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:25,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:25,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 10:19:25,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881303960] [2021-12-21 10:19:25,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:25,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 10:19:25,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:25,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 10:19:25,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:19:25,116 INFO L87 Difference]: Start difference. First operand 615 states and 789 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) [2021-12-21 10:19:25,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:25,446 INFO L93 Difference]: Finished difference Result 638 states and 814 transitions. [2021-12-21 10:19:25,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 10:19:25,447 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 [2021-12-21 10:19:25,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:25,448 INFO L225 Difference]: With dead ends: 638 [2021-12-21 10:19:25,448 INFO L226 Difference]: Without dead ends: 612 [2021-12-21 10:19:25,449 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:25,449 INFO L933 BasicCegarLoop]: 403 mSDtfsCounter, 232 mSDsluCounter, 2685 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 3088 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:25,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 3088 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:19:25,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-12-21 10:19:25,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2021-12-21 10:19:25,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 523 states have (on average 1.2810707456978967) internal successors, (670), 530 states have internal predecessors, (670), 51 states have call successors, (51), 28 states have call predecessors, (51), 37 states have return successors, (63), 53 states have call predecessors, (63), 46 states have call successors, (63) [2021-12-21 10:19:25,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 784 transitions. [2021-12-21 10:19:25,479 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 784 transitions. Word has length 54 [2021-12-21 10:19:25,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:25,479 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 784 transitions. [2021-12-21 10:19:25,479 INFO L471 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) [2021-12-21 10:19:25,480 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 784 transitions. [2021-12-21 10:19:25,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-21 10:19:25,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:25,481 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:25,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-12-21 10:19:25,481 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:25,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:25,481 INFO L85 PathProgramCache]: Analyzing trace with hash 362195338, now seen corresponding path program 1 times [2021-12-21 10:19:25,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:25,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311542609] [2021-12-21 10:19:25,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:25,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:25,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 10:19:25,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:25,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:25,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:25,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:25,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311542609] [2021-12-21 10:19:25,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311542609] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:25,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:25,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 10:19:25,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650951019] [2021-12-21 10:19:25,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:25,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 10:19:25,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:25,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 10:19:25,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:19:25,540 INFO L87 Difference]: Start difference. First operand 612 states and 784 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) [2021-12-21 10:19:25,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:25,944 INFO L93 Difference]: Finished difference Result 668 states and 856 transitions. [2021-12-21 10:19:25,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 10:19:25,944 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 [2021-12-21 10:19:25,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:25,946 INFO L225 Difference]: With dead ends: 668 [2021-12-21 10:19:25,946 INFO L226 Difference]: Without dead ends: 664 [2021-12-21 10:19:25,946 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:25,946 INFO L933 BasicCegarLoop]: 400 mSDtfsCounter, 723 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 1361 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:25,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 1361 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:19:25,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-12-21 10:19:25,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 609. [2021-12-21 10:19:25,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 520 states have (on average 1.2788461538461537) internal successors, (665), 527 states have internal predecessors, (665), 51 states have call successors, (51), 28 states have call predecessors, (51), 37 states have return successors, (63), 53 states have call predecessors, (63), 46 states have call successors, (63) [2021-12-21 10:19:25,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 779 transitions. [2021-12-21 10:19:25,977 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 779 transitions. Word has length 54 [2021-12-21 10:19:25,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:25,977 INFO L470 AbstractCegarLoop]: Abstraction has 609 states and 779 transitions. [2021-12-21 10:19:25,977 INFO L471 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) [2021-12-21 10:19:25,977 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 779 transitions. [2021-12-21 10:19:25,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-21 10:19:25,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:25,978 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:25,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-12-21 10:19:25,978 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:25,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:25,979 INFO L85 PathProgramCache]: Analyzing trace with hash 362472168, now seen corresponding path program 1 times [2021-12-21 10:19:25,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:25,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261949118] [2021-12-21 10:19:25,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:25,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:26,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 10:19:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:26,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:26,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:26,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261949118] [2021-12-21 10:19:26,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261949118] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:26,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:26,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 10:19:26,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930916662] [2021-12-21 10:19:26,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:26,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 10:19:26,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:26,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 10:19:26,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:19:26,066 INFO L87 Difference]: Start difference. First operand 609 states and 779 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) [2021-12-21 10:19:26,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:26,564 INFO L93 Difference]: Finished difference Result 619 states and 788 transitions. [2021-12-21 10:19:26,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 10:19:26,564 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 [2021-12-21 10:19:26,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:26,565 INFO L225 Difference]: With dead ends: 619 [2021-12-21 10:19:26,565 INFO L226 Difference]: Without dead ends: 591 [2021-12-21 10:19:26,566 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:26,569 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 287 mSDsluCounter, 2203 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 2575 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:26,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 2575 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:19:26,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-12-21 10:19:26,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 587. [2021-12-21 10:19:26,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 499 states have (on average 1.2725450901803608) internal successors, (635), 506 states have internal predecessors, (635), 51 states have call successors, (51), 28 states have call predecessors, (51), 36 states have return successors, (62), 52 states have call predecessors, (62), 46 states have call successors, (62) [2021-12-21 10:19:26,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 748 transitions. [2021-12-21 10:19:26,600 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 748 transitions. Word has length 54 [2021-12-21 10:19:26,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:26,602 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 748 transitions. [2021-12-21 10:19:26,602 INFO L471 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) [2021-12-21 10:19:26,602 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 748 transitions. [2021-12-21 10:19:26,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-21 10:19:26,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:26,604 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:26,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-12-21 10:19:26,604 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:26,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:26,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1415863677, now seen corresponding path program 1 times [2021-12-21 10:19:26,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:26,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348120154] [2021-12-21 10:19:26,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:26,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:26,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 10:19:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:26,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:26,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:26,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:26,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:26,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348120154] [2021-12-21 10:19:26,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348120154] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:26,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:26,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 10:19:26,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033956165] [2021-12-21 10:19:26,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:26,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 10:19:26,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:26,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 10:19:26,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:26,639 INFO L87 Difference]: Start difference. First operand 587 states and 748 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:19:26,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:26,831 INFO L93 Difference]: Finished difference Result 613 states and 778 transitions. [2021-12-21 10:19:26,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 10:19:26,831 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2021-12-21 10:19:26,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:26,833 INFO L225 Difference]: With dead ends: 613 [2021-12-21 10:19:26,833 INFO L226 Difference]: Without dead ends: 580 [2021-12-21 10:19:26,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:19:26,833 INFO L933 BasicCegarLoop]: 412 mSDtfsCounter, 232 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:26,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 951 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:26,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-12-21 10:19:26,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 576. [2021-12-21 10:19:26,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 489 states have (on average 1.2638036809815951) internal successors, (618), 496 states have internal predecessors, (618), 51 states have call successors, (51), 28 states have call predecessors, (51), 35 states have return successors, (61), 51 states have call predecessors, (61), 46 states have call successors, (61) [2021-12-21 10:19:26,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 730 transitions. [2021-12-21 10:19:26,864 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 730 transitions. Word has length 54 [2021-12-21 10:19:26,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:26,864 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 730 transitions. [2021-12-21 10:19:26,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:19:26,864 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 730 transitions. [2021-12-21 10:19:26,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 10:19:26,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:26,865 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:26,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-12-21 10:19:26,866 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:26,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:26,866 INFO L85 PathProgramCache]: Analyzing trace with hash -275547021, now seen corresponding path program 1 times [2021-12-21 10:19:26,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:26,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071120254] [2021-12-21 10:19:26,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:26,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:26,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:26,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 10:19:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:26,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 10:19:26,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:26,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:26,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:26,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:26,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071120254] [2021-12-21 10:19:26,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071120254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:26,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:26,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 10:19:26,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367251066] [2021-12-21 10:19:26,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:26,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 10:19:26,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:26,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 10:19:26,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:19:26,918 INFO L87 Difference]: Start difference. First operand 576 states and 730 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) [2021-12-21 10:19:27,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:27,187 INFO L93 Difference]: Finished difference Result 625 states and 782 transitions. [2021-12-21 10:19:27,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 10:19:27,187 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 [2021-12-21 10:19:27,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:27,189 INFO L225 Difference]: With dead ends: 625 [2021-12-21 10:19:27,189 INFO L226 Difference]: Without dead ends: 594 [2021-12-21 10:19:27,189 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:27,189 INFO L933 BasicCegarLoop]: 397 mSDtfsCounter, 282 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 1596 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:27,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 1596 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:27,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-12-21 10:19:27,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 576. [2021-12-21 10:19:27,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 489 states have (on average 1.261758691206544) internal successors, (617), 496 states have internal predecessors, (617), 51 states have call successors, (51), 28 states have call predecessors, (51), 35 states have return successors, (61), 51 states have call predecessors, (61), 46 states have call successors, (61) [2021-12-21 10:19:27,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 729 transitions. [2021-12-21 10:19:27,219 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 729 transitions. Word has length 56 [2021-12-21 10:19:27,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:27,220 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 729 transitions. [2021-12-21 10:19:27,220 INFO L471 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) [2021-12-21 10:19:27,220 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 729 transitions. [2021-12-21 10:19:27,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 10:19:27,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:27,221 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:27,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-12-21 10:19:27,221 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:27,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:27,221 INFO L85 PathProgramCache]: Analyzing trace with hash -252914767, now seen corresponding path program 1 times [2021-12-21 10:19:27,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:27,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253590240] [2021-12-21 10:19:27,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:27,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:27,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:27,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 10:19:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:27,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 10:19:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:27,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:27,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:27,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:27,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:27,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253590240] [2021-12-21 10:19:27,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253590240] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:27,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:27,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-21 10:19:27,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565260231] [2021-12-21 10:19:27,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:27,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 10:19:27,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:27,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 10:19:27,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:19:27,314 INFO L87 Difference]: Start difference. First operand 576 states and 729 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) [2021-12-21 10:19:27,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:27,875 INFO L93 Difference]: Finished difference Result 619 states and 778 transitions. [2021-12-21 10:19:27,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 10:19:27,876 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 [2021-12-21 10:19:27,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:27,877 INFO L225 Difference]: With dead ends: 619 [2021-12-21 10:19:27,877 INFO L226 Difference]: Without dead ends: 589 [2021-12-21 10:19:27,877 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:27,877 INFO L933 BasicCegarLoop]: 391 mSDtfsCounter, 260 mSDsluCounter, 3235 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 3626 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:27,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 3626 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1125 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:19:27,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-12-21 10:19:27,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 571. [2021-12-21 10:19:27,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 485 states have (on average 1.2577319587628866) internal successors, (610), 492 states have internal predecessors, (610), 50 states have call successors, (50), 28 states have call predecessors, (50), 35 states have return successors, (59), 50 states have call predecessors, (59), 45 states have call successors, (59) [2021-12-21 10:19:27,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 719 transitions. [2021-12-21 10:19:27,906 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 719 transitions. Word has length 56 [2021-12-21 10:19:27,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:27,906 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 719 transitions. [2021-12-21 10:19:27,906 INFO L471 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) [2021-12-21 10:19:27,906 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 719 transitions. [2021-12-21 10:19:27,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 10:19:27,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:27,907 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:27,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-12-21 10:19:27,907 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:27,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:27,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1867013461, now seen corresponding path program 1 times [2021-12-21 10:19:27,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:27,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183395244] [2021-12-21 10:19:27,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:27,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:27,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:27,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 10:19:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:27,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 10:19:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:27,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:27,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:27,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:27,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:27,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183395244] [2021-12-21 10:19:27,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183395244] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:27,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:27,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 10:19:27,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707527652] [2021-12-21 10:19:27,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:27,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 10:19:27,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:27,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 10:19:27,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:19:27,951 INFO L87 Difference]: Start difference. First operand 571 states and 719 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) [2021-12-21 10:19:28,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:28,247 INFO L93 Difference]: Finished difference Result 602 states and 751 transitions. [2021-12-21 10:19:28,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 10:19:28,247 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 [2021-12-21 10:19:28,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:28,249 INFO L225 Difference]: With dead ends: 602 [2021-12-21 10:19:28,249 INFO L226 Difference]: Without dead ends: 565 [2021-12-21 10:19:28,249 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:28,249 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 170 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1894 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:28,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 1894 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:28,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-12-21 10:19:28,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 565. [2021-12-21 10:19:28,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 480 states have (on average 1.2583333333333333) internal successors, (604), 487 states have internal predecessors, (604), 49 states have call successors, (49), 28 states have call predecessors, (49), 35 states have return successors, (58), 49 states have call predecessors, (58), 44 states have call successors, (58) [2021-12-21 10:19:28,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 711 transitions. [2021-12-21 10:19:28,279 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 711 transitions. Word has length 56 [2021-12-21 10:19:28,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:28,279 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 711 transitions. [2021-12-21 10:19:28,279 INFO L471 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) [2021-12-21 10:19:28,279 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 711 transitions. [2021-12-21 10:19:28,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 10:19:28,280 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:28,280 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:28,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-12-21 10:19:28,280 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:28,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:28,281 INFO L85 PathProgramCache]: Analyzing trace with hash -929165957, now seen corresponding path program 1 times [2021-12-21 10:19:28,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:28,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998973787] [2021-12-21 10:19:28,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:28,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:28,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 10:19:28,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:28,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:28,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:28,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:28,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998973787] [2021-12-21 10:19:28,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998973787] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:28,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:28,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 10:19:28,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877728747] [2021-12-21 10:19:28,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:28,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 10:19:28,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:28,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 10:19:28,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:19:28,387 INFO L87 Difference]: Start difference. First operand 565 states and 711 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:19:28,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:28,884 INFO L93 Difference]: Finished difference Result 722 states and 895 transitions. [2021-12-21 10:19:28,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 10:19:28,885 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 8 states have internal predecessors, (51), 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 56 [2021-12-21 10:19:28,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:28,886 INFO L225 Difference]: With dead ends: 722 [2021-12-21 10:19:28,886 INFO L226 Difference]: Without dead ends: 604 [2021-12-21 10:19:28,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-12-21 10:19:28,887 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 217 mSDsluCounter, 2522 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 2879 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:28,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 2879 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:19:28,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-12-21 10:19:28,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 571. [2021-12-21 10:19:28,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 486 states have (on average 1.2469135802469136) internal successors, (606), 493 states have internal predecessors, (606), 49 states have call successors, (49), 28 states have call predecessors, (49), 35 states have return successors, (58), 49 states have call predecessors, (58), 44 states have call successors, (58) [2021-12-21 10:19:28,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 713 transitions. [2021-12-21 10:19:28,918 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 713 transitions. Word has length 56 [2021-12-21 10:19:28,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:28,918 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 713 transitions. [2021-12-21 10:19:28,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:19:28,918 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 713 transitions. [2021-12-21 10:19:28,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-21 10:19:28,919 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:28,919 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:28,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-12-21 10:19:28,919 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:28,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:28,920 INFO L85 PathProgramCache]: Analyzing trace with hash -535968494, now seen corresponding path program 1 times [2021-12-21 10:19:28,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:28,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256527430] [2021-12-21 10:19:28,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:28,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:28,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:28,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 10:19:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:28,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 10:19:28,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:29,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:29,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:29,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:29,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:29,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256527430] [2021-12-21 10:19:29,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256527430] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:29,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:29,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-21 10:19:29,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102531724] [2021-12-21 10:19:29,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:29,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 10:19:29,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:29,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 10:19:29,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:19:29,016 INFO L87 Difference]: Start difference. First operand 571 states and 713 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) [2021-12-21 10:19:29,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:29,528 INFO L93 Difference]: Finished difference Result 591 states and 734 transitions. [2021-12-21 10:19:29,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 10:19:29,529 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 [2021-12-21 10:19:29,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:29,530 INFO L225 Difference]: With dead ends: 591 [2021-12-21 10:19:29,530 INFO L226 Difference]: Without dead ends: 569 [2021-12-21 10:19:29,530 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:29,531 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 235 mSDsluCounter, 2919 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 3283 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:29,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 3283 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1108 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:19:29,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-12-21 10:19:29,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 569. [2021-12-21 10:19:29,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 484 states have (on average 1.2458677685950412) internal successors, (603), 491 states have internal predecessors, (603), 49 states have call successors, (49), 28 states have call predecessors, (49), 35 states have return successors, (58), 49 states have call predecessors, (58), 44 states have call successors, (58) [2021-12-21 10:19:29,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 710 transitions. [2021-12-21 10:19:29,571 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 710 transitions. Word has length 62 [2021-12-21 10:19:29,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:29,571 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 710 transitions. [2021-12-21 10:19:29,571 INFO L471 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) [2021-12-21 10:19:29,571 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 710 transitions. [2021-12-21 10:19:29,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-21 10:19:29,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:29,572 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:29,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-12-21 10:19:29,572 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:29,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:29,572 INFO L85 PathProgramCache]: Analyzing trace with hash -274878733, now seen corresponding path program 1 times [2021-12-21 10:19:29,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:29,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177281662] [2021-12-21 10:19:29,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:29,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:29,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:29,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:29,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:29,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 10:19:29,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:29,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 10:19:29,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:29,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:29,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:29,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:29,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177281662] [2021-12-21 10:19:29,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177281662] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:29,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:29,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 10:19:29,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681424681] [2021-12-21 10:19:29,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:29,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 10:19:29,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:29,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 10:19:29,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:19:29,621 INFO L87 Difference]: Start difference. First operand 569 states and 710 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 4 states have internal predecessors, (54), 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) [2021-12-21 10:19:29,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:29,903 INFO L93 Difference]: Finished difference Result 600 states and 742 transitions. [2021-12-21 10:19:29,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 10:19:29,904 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 4 states have internal predecessors, (54), 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 63 [2021-12-21 10:19:29,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:29,905 INFO L225 Difference]: With dead ends: 600 [2021-12-21 10:19:29,905 INFO L226 Difference]: Without dead ends: 553 [2021-12-21 10:19:29,905 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:29,905 INFO L933 BasicCegarLoop]: 345 mSDtfsCounter, 170 mSDsluCounter, 1409 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1754 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:29,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 1754 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:29,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-12-21 10:19:29,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 553. [2021-12-21 10:19:29,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 471 states have (on average 1.2420382165605095) internal successors, (585), 478 states have internal predecessors, (585), 46 states have call successors, (46), 28 states have call predecessors, (46), 35 states have return successors, (54), 46 states have call predecessors, (54), 41 states have call successors, (54) [2021-12-21 10:19:29,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 685 transitions. [2021-12-21 10:19:29,935 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 685 transitions. Word has length 63 [2021-12-21 10:19:29,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:29,935 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 685 transitions. [2021-12-21 10:19:29,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 4 states have internal predecessors, (54), 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) [2021-12-21 10:19:29,935 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 685 transitions. [2021-12-21 10:19:29,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-21 10:19:29,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:29,936 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:29,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-12-21 10:19:29,936 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:29,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:29,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1927582732, now seen corresponding path program 1 times [2021-12-21 10:19:29,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:29,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33172575] [2021-12-21 10:19:29,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:29,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:29,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 10:19:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:29,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 10:19:29,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:29,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:29,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:29,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33172575] [2021-12-21 10:19:29,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33172575] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:29,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:29,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 10:19:29,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830048653] [2021-12-21 10:19:29,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:29,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 10:19:29,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:29,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 10:19:29,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:19:29,991 INFO L87 Difference]: Start difference. First operand 553 states and 685 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) [2021-12-21 10:19:30,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:30,232 INFO L93 Difference]: Finished difference Result 584 states and 717 transitions. [2021-12-21 10:19:30,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 10:19:30,233 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 [2021-12-21 10:19:30,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:30,234 INFO L225 Difference]: With dead ends: 584 [2021-12-21 10:19:30,234 INFO L226 Difference]: Without dead ends: 540 [2021-12-21 10:19:30,234 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:30,234 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 264 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:30,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 1315 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:30,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-12-21 10:19:30,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-12-21 10:19:30,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 459 states have (on average 1.2374727668845316) internal successors, (568), 466 states have internal predecessors, (568), 45 states have call successors, (45), 28 states have call predecessors, (45), 35 states have return successors, (53), 45 states have call predecessors, (53), 40 states have call successors, (53) [2021-12-21 10:19:30,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 666 transitions. [2021-12-21 10:19:30,263 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 666 transitions. Word has length 58 [2021-12-21 10:19:30,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:30,263 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 666 transitions. [2021-12-21 10:19:30,263 INFO L471 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) [2021-12-21 10:19:30,263 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 666 transitions. [2021-12-21 10:19:30,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-21 10:19:30,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:30,264 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:30,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-12-21 10:19:30,264 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:30,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:30,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1948179698, now seen corresponding path program 1 times [2021-12-21 10:19:30,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:30,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629862668] [2021-12-21 10:19:30,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:30,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:30,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 10:19:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:30,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 10:19:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:30,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:30,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:30,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629862668] [2021-12-21 10:19:30,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629862668] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:30,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:30,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-21 10:19:30,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266415277] [2021-12-21 10:19:30,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:30,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 10:19:30,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:30,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 10:19:30,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-12-21 10:19:30,415 INFO L87 Difference]: Start difference. First operand 540 states and 666 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) [2021-12-21 10:19:31,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:31,032 INFO L93 Difference]: Finished difference Result 556 states and 682 transitions. [2021-12-21 10:19:31,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 10:19:31,032 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 [2021-12-21 10:19:31,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:31,034 INFO L225 Difference]: With dead ends: 556 [2021-12-21 10:19:31,034 INFO L226 Difference]: Without dead ends: 535 [2021-12-21 10:19:31,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-12-21 10:19:31,034 INFO L933 BasicCegarLoop]: 329 mSDtfsCounter, 207 mSDsluCounter, 2334 mSDsCounter, 0 mSdLazyCounter, 1332 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 2663 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:31,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 2663 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1332 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:19:31,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-12-21 10:19:31,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 535. [2021-12-21 10:19:31,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 456 states have (on average 1.236842105263158) internal successors, (564), 463 states have internal predecessors, (564), 43 states have call successors, (43), 28 states have call predecessors, (43), 35 states have return successors, (51), 43 states have call predecessors, (51), 38 states have call successors, (51) [2021-12-21 10:19:31,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 658 transitions. [2021-12-21 10:19:31,062 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 658 transitions. Word has length 64 [2021-12-21 10:19:31,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:31,062 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 658 transitions. [2021-12-21 10:19:31,063 INFO L471 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) [2021-12-21 10:19:31,063 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 658 transitions. [2021-12-21 10:19:31,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-21 10:19:31,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:31,063 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:31,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-12-21 10:19:31,064 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:31,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:31,064 INFO L85 PathProgramCache]: Analyzing trace with hash 233509778, now seen corresponding path program 1 times [2021-12-21 10:19:31,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:31,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299587938] [2021-12-21 10:19:31,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:31,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:31,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 10:19:31,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:31,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:31,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:31,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:31,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299587938] [2021-12-21 10:19:31,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299587938] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:31,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:31,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-21 10:19:31,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601605714] [2021-12-21 10:19:31,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:31,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 10:19:31,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:31,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 10:19:31,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:19:31,178 INFO L87 Difference]: Start difference. First operand 535 states and 658 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) [2021-12-21 10:19:31,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:31,667 INFO L93 Difference]: Finished difference Result 537 states and 659 transitions. [2021-12-21 10:19:31,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 10:19:31,668 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 [2021-12-21 10:19:31,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:31,669 INFO L225 Difference]: With dead ends: 537 [2021-12-21 10:19:31,669 INFO L226 Difference]: Without dead ends: 493 [2021-12-21 10:19:31,669 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:31,670 INFO L933 BasicCegarLoop]: 311 mSDtfsCounter, 115 mSDsluCounter, 2211 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 2522 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:31,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 2522 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:19:31,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-12-21 10:19:31,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 493. [2021-12-21 10:19:31,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 419 states have (on average 1.2458233890214798) internal successors, (522), 425 states have internal predecessors, (522), 40 states have call successors, (40), 26 states have call predecessors, (40), 33 states have return successors, (49), 41 states have call predecessors, (49), 36 states have call successors, (49) [2021-12-21 10:19:31,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 611 transitions. [2021-12-21 10:19:31,698 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 611 transitions. Word has length 57 [2021-12-21 10:19:31,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:31,698 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 611 transitions. [2021-12-21 10:19:31,698 INFO L471 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) [2021-12-21 10:19:31,698 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 611 transitions. [2021-12-21 10:19:31,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-21 10:19:31,699 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:31,699 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:31,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-12-21 10:19:31,699 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:31,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:31,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1034079897, now seen corresponding path program 1 times [2021-12-21 10:19:31,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:31,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359985845] [2021-12-21 10:19:31,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:31,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:31,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 10:19:31,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:31,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:31,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:31,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 10:19:31,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:31,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:31,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:31,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359985845] [2021-12-21 10:19:31,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359985845] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:31,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:31,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 10:19:31,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699129810] [2021-12-21 10:19:31,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:31,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 10:19:31,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:31,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 10:19:31,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:19:31,803 INFO L87 Difference]: Start difference. First operand 493 states and 611 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) [2021-12-21 10:19:32,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:32,799 INFO L93 Difference]: Finished difference Result 1028 states and 1263 transitions. [2021-12-21 10:19:32,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-21 10:19:32,799 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 [2021-12-21 10:19:32,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:32,801 INFO L225 Difference]: With dead ends: 1028 [2021-12-21 10:19:32,802 INFO L226 Difference]: Without dead ends: 908 [2021-12-21 10:19:32,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=273, Invalid=1287, Unknown=0, NotChecked=0, Total=1560 [2021-12-21 10:19:32,802 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 686 mSDsluCounter, 1991 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 2347 SdHoareTripleChecker+Invalid, 1235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:32,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [702 Valid, 2347 Invalid, 1235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:19:32,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2021-12-21 10:19:32,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 717. [2021-12-21 10:19:32,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 604 states have (on average 1.2450331125827814) internal successors, (752), 616 states have internal predecessors, (752), 59 states have call successors, (59), 42 states have call predecessors, (59), 53 states have return successors, (75), 58 states have call predecessors, (75), 55 states have call successors, (75) [2021-12-21 10:19:32,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 886 transitions. [2021-12-21 10:19:32,859 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 886 transitions. Word has length 58 [2021-12-21 10:19:32,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:32,860 INFO L470 AbstractCegarLoop]: Abstraction has 717 states and 886 transitions. [2021-12-21 10:19:32,860 INFO L471 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) [2021-12-21 10:19:32,860 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 886 transitions. [2021-12-21 10:19:32,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-21 10:19:32,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:32,861 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:32,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-12-21 10:19:32,861 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:32,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:32,861 INFO L85 PathProgramCache]: Analyzing trace with hash -158060891, now seen corresponding path program 1 times [2021-12-21 10:19:32,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:32,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167636750] [2021-12-21 10:19:32,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:32,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:32,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:32,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 10:19:32,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:32,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:32,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:32,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 10:19:32,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:32,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:32,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167636750] [2021-12-21 10:19:32,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167636750] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:32,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:32,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 10:19:32,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722438045] [2021-12-21 10:19:32,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:32,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 10:19:32,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:32,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 10:19:32,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:19:32,896 INFO L87 Difference]: Start difference. First operand 717 states and 886 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) [2021-12-21 10:19:33,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:33,330 INFO L93 Difference]: Finished difference Result 1014 states and 1243 transitions. [2021-12-21 10:19:33,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 10:19:33,331 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 [2021-12-21 10:19:33,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:33,333 INFO L225 Difference]: With dead ends: 1014 [2021-12-21 10:19:33,333 INFO L226 Difference]: Without dead ends: 905 [2021-12-21 10:19:33,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-12-21 10:19:33,334 INFO L933 BasicCegarLoop]: 557 mSDtfsCounter, 789 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 1894 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:33,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [815 Valid, 1894 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:19:33,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-12-21 10:19:33,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 537. [2021-12-21 10:19:33,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 458 states have (on average 1.2314410480349345) internal successors, (564), 464 states have internal predecessors, (564), 42 states have call successors, (42), 30 states have call predecessors, (42), 36 states have return successors, (51), 42 states have call predecessors, (51), 38 states have call successors, (51) [2021-12-21 10:19:33,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 657 transitions. [2021-12-21 10:19:33,376 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 657 transitions. Word has length 58 [2021-12-21 10:19:33,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:33,376 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 657 transitions. [2021-12-21 10:19:33,376 INFO L471 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) [2021-12-21 10:19:33,376 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 657 transitions. [2021-12-21 10:19:33,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-21 10:19:33,377 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:33,377 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:33,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-12-21 10:19:33,378 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:33,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:33,378 INFO L85 PathProgramCache]: Analyzing trace with hash 273629316, now seen corresponding path program 1 times [2021-12-21 10:19:33,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:33,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556496322] [2021-12-21 10:19:33,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:33,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:33,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:33,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 10:19:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:33,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 10:19:33,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:33,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-21 10:19:33,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:33,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:33,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:33,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:33,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:33,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556496322] [2021-12-21 10:19:33,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556496322] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:33,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:33,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-21 10:19:33,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502212824] [2021-12-21 10:19:33,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:33,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 10:19:33,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:33,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 10:19:33,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:19:33,509 INFO L87 Difference]: Start difference. First operand 537 states and 657 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) [2021-12-21 10:19:34,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:34,031 INFO L93 Difference]: Finished difference Result 554 states and 674 transitions. [2021-12-21 10:19:34,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 10:19:34,032 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 [2021-12-21 10:19:34,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:34,033 INFO L225 Difference]: With dead ends: 554 [2021-12-21 10:19:34,033 INFO L226 Difference]: Without dead ends: 504 [2021-12-21 10:19:34,033 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:34,033 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 218 mSDsluCounter, 2300 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 2596 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:34,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 2596 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:19:34,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-12-21 10:19:34,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 504. [2021-12-21 10:19:34,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 432 states have (on average 1.2222222222222223) internal successors, (528), 438 states have internal predecessors, (528), 37 states have call successors, (37), 28 states have call predecessors, (37), 34 states have return successors, (45), 37 states have call predecessors, (45), 33 states have call successors, (45) [2021-12-21 10:19:34,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 610 transitions. [2021-12-21 10:19:34,072 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 610 transitions. Word has length 60 [2021-12-21 10:19:34,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:34,072 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 610 transitions. [2021-12-21 10:19:34,073 INFO L471 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) [2021-12-21 10:19:34,073 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 610 transitions. [2021-12-21 10:19:34,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-21 10:19:34,073 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:34,073 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:34,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-12-21 10:19:34,074 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:34,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:34,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1406802114, now seen corresponding path program 1 times [2021-12-21 10:19:34,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:34,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899974059] [2021-12-21 10:19:34,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:34,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:34,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 10:19:34,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:34,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-21 10:19:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:34,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:34,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:34,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899974059] [2021-12-21 10:19:34,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899974059] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:34,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:34,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 10:19:34,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511105219] [2021-12-21 10:19:34,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:34,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 10:19:34,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:34,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 10:19:34,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:19:34,110 INFO L87 Difference]: Start difference. First operand 504 states and 610 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) [2021-12-21 10:19:34,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:34,279 INFO L93 Difference]: Finished difference Result 531 states and 638 transitions. [2021-12-21 10:19:34,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 10:19:34,279 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 [2021-12-21 10:19:34,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:34,280 INFO L225 Difference]: With dead ends: 531 [2021-12-21 10:19:34,280 INFO L226 Difference]: Without dead ends: 494 [2021-12-21 10:19:34,281 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:19:34,282 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 67 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:34,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 1162 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:34,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-12-21 10:19:34,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 494. [2021-12-21 10:19:34,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 423 states have (on average 1.2222222222222223) internal successors, (517), 429 states have internal predecessors, (517), 36 states have call successors, (36), 28 states have call predecessors, (36), 34 states have return successors, (43), 36 states have call predecessors, (43), 32 states have call successors, (43) [2021-12-21 10:19:34,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 596 transitions. [2021-12-21 10:19:34,316 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 596 transitions. Word has length 58 [2021-12-21 10:19:34,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:34,316 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 596 transitions. [2021-12-21 10:19:34,316 INFO L471 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) [2021-12-21 10:19:34,316 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 596 transitions. [2021-12-21 10:19:34,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-21 10:19:34,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:34,317 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:34,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-12-21 10:19:34,317 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:34,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:34,318 INFO L85 PathProgramCache]: Analyzing trace with hash 472047151, now seen corresponding path program 1 times [2021-12-21 10:19:34,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:34,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029137742] [2021-12-21 10:19:34,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:34,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:34,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 10:19:34,329 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 10:19:34,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 10:19:34,369 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 10:19:34,370 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-21 10:19:34,370 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-21 10:19:34,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-12-21 10:19:34,374 INFO L732 BasicCegarLoop]: Path program 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] [2021-12-21 10:19:34,376 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-21 10:19:34,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 10:19:34 BoogieIcfgContainer [2021-12-21 10:19:34,451 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-21 10:19:34,452 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-21 10:19:34,452 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-21 10:19:34,452 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-21 10:19:34,452 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:19:02" (3/4) ... [2021-12-21 10:19:34,453 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-21 10:19:34,515 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-21 10:19:34,516 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-21 10:19:34,516 INFO L158 Benchmark]: Toolchain (without parser) took 33690.04ms. Allocated memory was 96.5MB in the beginning and 352.3MB in the end (delta: 255.9MB). Free memory was 66.2MB in the beginning and 300.6MB in the end (delta: -234.4MB). Peak memory consumption was 20.9MB. Max. memory is 16.1GB. [2021-12-21 10:19:34,516 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 96.5MB. Free memory is still 53.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 10:19:34,516 INFO L158 Benchmark]: CACSL2BoogieTranslator took 454.30ms. Allocated memory was 96.5MB in the beginning and 123.7MB in the end (delta: 27.3MB). Free memory was 66.2MB in the beginning and 82.0MB in the end (delta: -15.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-21 10:19:34,516 INFO L158 Benchmark]: Boogie Procedure Inliner took 84.07ms. Allocated memory is still 123.7MB. Free memory was 82.0MB in the beginning and 75.0MB in the end (delta: 7.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-21 10:19:34,516 INFO L158 Benchmark]: Boogie Preprocessor took 59.20ms. Allocated memory is still 123.7MB. Free memory was 75.0MB in the beginning and 70.2MB in the end (delta: 4.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-21 10:19:34,517 INFO L158 Benchmark]: RCFGBuilder took 1090.03ms. Allocated memory is still 123.7MB. Free memory was 70.2MB in the beginning and 87.8MB in the end (delta: -17.7MB). Peak memory consumption was 48.0MB. Max. memory is 16.1GB. [2021-12-21 10:19:34,517 INFO L158 Benchmark]: TraceAbstraction took 31930.22ms. Allocated memory was 123.7MB in the beginning and 352.3MB in the end (delta: 228.6MB). Free memory was 87.2MB in the beginning and 314.2MB in the end (delta: -227.1MB). Peak memory consumption was 208.1MB. Max. memory is 16.1GB. [2021-12-21 10:19:34,517 INFO L158 Benchmark]: Witness Printer took 63.98ms. Allocated memory is still 352.3MB. Free memory was 314.2MB in the beginning and 300.6MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-21 10:19:34,522 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 96.5MB. Free memory is still 53.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 454.30ms. Allocated memory was 96.5MB in the beginning and 123.7MB in the end (delta: 27.3MB). Free memory was 66.2MB in the beginning and 82.0MB in the end (delta: -15.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 84.07ms. Allocated memory is still 123.7MB. Free memory was 82.0MB in the beginning and 75.0MB in the end (delta: 7.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.20ms. Allocated memory is still 123.7MB. Free memory was 75.0MB in the beginning and 70.2MB in the end (delta: 4.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1090.03ms. Allocated memory is still 123.7MB. Free memory was 70.2MB in the beginning and 87.8MB in the end (delta: -17.7MB). Peak memory consumption was 48.0MB. Max. memory is 16.1GB. * TraceAbstraction took 31930.22ms. Allocated memory was 123.7MB in the beginning and 352.3MB in the end (delta: 228.6MB). Free memory was 87.2MB in the beginning and 314.2MB in the end (delta: -227.1MB). Peak memory consumption was 208.1MB. Max. memory is 16.1GB. * Witness Printer took 63.98ms. Allocated memory is still 352.3MB. Free memory was 314.2MB in the beginning and 300.6MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 59]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L32] int s ; [L33] int UNLOADED ; [L34] int NP ; [L35] int DC ; [L36] int SKIP1 ; [L37] int SKIP2 ; [L38] int MPR1 ; [L39] int MPR3 ; [L40] int IPC ; [L41] int pended ; [L42] int compFptr ; [L43] int compRegistered ; [L44] int lowerDriverReturn ; [L45] int setEventCalled ; [L46] int customIrp ; [L47] int routine ; [L48] int myStatus ; [L49] int pirp ; [L50] int Executive ; [L51] int Suspended ; [L52] int KernelMode ; [L53] int DeviceUsageTypePaging ; VAL [compFptr=0, compRegistered=0, customIrp=0, DC=0, DeviceUsageTypePaging=0, Executive=0, IPC=0, KernelMode=0, lowerDriverReturn=0, MPR1=0, MPR3=0, myStatus=0, NP=0, pended=0, pirp=0, routine=0, s=0, setEventCalled=0, SKIP1=0, SKIP2=0, Suspended=0, UNLOADED=0] [L1718] int pirp__IoStatus__Status ; [L1719] int d = __VERIFIER_nondet_int() ; [L1720] int status = __VERIFIER_nondet_int() ; [L1721] int irp = __VERIFIER_nondet_int() ; [L1722] int we_should_unload = __VERIFIER_nondet_int() ; [L1723] int irp_choice = __VERIFIER_nondet_int() ; [L1724] int devobj = __VERIFIER_nondet_int() ; [L1725] int __cil_tmp9 ; [L1730] s = 0 [L1731] UNLOADED = 0 [L1732] NP = 0 [L1733] DC = 0 [L1734] SKIP1 = 0 [L1735] SKIP2 = 0 [L1736] MPR1 = 0 [L1737] MPR3 = 0 [L1738] IPC = 0 [L1739] pended = 0 [L1740] compFptr = 0 [L1741] compRegistered = 0 [L1742] lowerDriverReturn = 0 [L1743] setEventCalled = 0 [L1744] customIrp = 0 [L1745] routine = 0 [L1746] myStatus = 0 [L1747] pirp = 0 [L1748] Executive = 0 [L1749] Suspended = 5 [L1750] KernelMode = 0 [L1751] DeviceUsageTypePaging = 1 [L1754] pirp = irp [L1755] CALL _BLAST_init() [L67] UNLOADED = 0 [L68] NP = 1 [L69] DC = 2 [L70] SKIP1 = 3 [L71] SKIP2 = 4 [L72] MPR1 = 5 [L73] MPR3 = 6 [L74] IPC = 7 [L75] s = UNLOADED [L76] pended = 0 [L77] compFptr = 0 [L78] compRegistered = 0 [L79] lowerDriverReturn = 0 [L80] setEventCalled = 0 [L81] customIrp = 0 VAL [compFptr=0, compRegistered=0, customIrp=0, DC=2, DeviceUsageTypePaging=1, Executive=0, IPC=7, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=0, NP=1, pended=0, pirp=0, routine=0, s=0, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, UNLOADED=0] [L1755] RET _BLAST_init() [L1757] COND TRUE status >= 0 [L1758] s = NP [L1759] customIrp = 0 [L1760] setEventCalled = customIrp [L1761] lowerDriverReturn = setEventCalled [L1762] compRegistered = lowerDriverReturn [L1763] compFptr = compRegistered [L1764] pended = compFptr [L1765] pirp__IoStatus__Status = 0 [L1766] myStatus = 0 VAL [compFptr=0, compRegistered=0, customIrp=0, d=0, DC=2, DeviceUsageTypePaging=1, devobj=0, Executive=0, IPC=7, irp=0, irp_choice=0, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=0, NP=1, pended=0, pirp=0, pirp__IoStatus__Status=0, routine=0, s=1, setEventCalled=0, SKIP1=3, SKIP2=4, status=0, Suspended=5, UNLOADED=0, we_should_unload=0] [L1767] COND TRUE irp_choice == 0 [L1768] pirp__IoStatus__Status = -1073741637 [L1769] myStatus = -1073741637 VAL [compFptr=0, compRegistered=0, customIrp=0, d=0, DC=2, DeviceUsageTypePaging=1, devobj=0, Executive=0, IPC=7, irp=0, irp_choice=0, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=0, pirp=0, pirp__IoStatus__Status=-1073741637, routine=0, s=1, setEventCalled=0, SKIP1=3, SKIP2=4, status=0, Suspended=5, UNLOADED=0, we_should_unload=0] [L1772] CALL stub_driver_init() [L1707] s = NP [L1708] customIrp = 0 [L1709] setEventCalled = customIrp [L1710] lowerDriverReturn = setEventCalled [L1711] compRegistered = lowerDriverReturn [L1712] compFptr = compRegistered [L1713] pended = compFptr VAL [compFptr=0, compRegistered=0, customIrp=0, DC=2, DeviceUsageTypePaging=1, Executive=0, IPC=7, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=0, pirp=0, routine=0, s=1, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, UNLOADED=0] [L1772] RET stub_driver_init() [L1775] COND FALSE !(status < 0) [L1779] int tmp_ndt_1; [L1780] tmp_ndt_1 = __VERIFIER_nondet_int() [L1781] COND TRUE tmp_ndt_1 == 2 VAL [compFptr=0, compRegistered=0, customIrp=0, d=0, DC=2, DeviceUsageTypePaging=1, devobj=0, Executive=0, IPC=7, irp=0, irp_choice=0, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=0, pirp=0, pirp__IoStatus__Status=-1073741637, routine=0, s=1, setEventCalled=0, SKIP1=3, SKIP2=4, status=0, Suspended=5, tmp_ndt_1=2, UNLOADED=0, we_should_unload=0] [L1798] CALL, EXPR CdAudioDeviceControl(devobj, pirp) [L313] int deviceExtension__Active = __VERIFIER_nondet_int() ; [L314] int status ; VAL [\old(DeviceObject)=0, \old(Irp)=0, compFptr=0, compRegistered=0, customIrp=0, DC=2, deviceExtension__Active=7, DeviceObject=0, DeviceUsageTypePaging=1, Executive=0, IPC=7, Irp=0, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=0, pirp=0, routine=0, s=1, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, UNLOADED=0] [L317] COND FALSE !(deviceExtension__Active == 2) VAL [\old(DeviceObject)=0, \old(Irp)=0, compFptr=0, compRegistered=0, customIrp=0, DC=2, deviceExtension__Active=7, DeviceObject=0, DeviceUsageTypePaging=1, Executive=0, IPC=7, Irp=0, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=0, pirp=0, routine=0, s=1, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, UNLOADED=0] [L320] COND FALSE !(deviceExtension__Active == 3) VAL [\old(DeviceObject)=0, \old(Irp)=0, compFptr=0, compRegistered=0, customIrp=0, DC=2, deviceExtension__Active=7, DeviceObject=0, DeviceUsageTypePaging=1, Executive=0, IPC=7, Irp=0, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=0, pirp=0, routine=0, s=1, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, UNLOADED=0] [L323] COND FALSE !(deviceExtension__Active == 1) VAL [\old(DeviceObject)=0, \old(Irp)=0, compFptr=0, compRegistered=0, customIrp=0, DC=2, deviceExtension__Active=7, DeviceObject=0, DeviceUsageTypePaging=1, Executive=0, IPC=7, Irp=0, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=0, pirp=0, routine=0, s=1, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, UNLOADED=0] [L326] COND TRUE deviceExtension__Active == 7 VAL [\old(DeviceObject)=0, \old(Irp)=0, compFptr=0, compRegistered=0, customIrp=0, DC=2, deviceExtension__Active=7, DeviceObject=0, DeviceUsageTypePaging=1, Executive=0, IPC=7, Irp=0, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=0, pirp=0, routine=0, s=1, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, UNLOADED=0] [L348] CALL, EXPR CdAudioHPCdrDeviceControl(DeviceObject, Irp) [L1591] int currentIrpStack__Parameters__DeviceIoControl__IoControlCode = __VERIFIER_nondet_int() ; [L1592] int deviceExtension__TargetDeviceObject = __VERIFIER_nondet_int() ; [L1593] int irpSp__Control ; [L1594] int tmp ; [L1595] int tmp___0 ; [L1596] int __cil_tmp8 ; [L1597] int __cil_tmp9 ; [L1598] int __cil_tmp10 ; [L1599] int __cil_tmp11 ; [L1600] int __cil_tmp12 ; [L1604] __cil_tmp8 = 56 [L1605] __cil_tmp9 = 16384 [L1606] __cil_tmp10 = 131072 [L1607] __cil_tmp11 = 147456 [L1608] __cil_tmp12 = 147512 VAL [\old(DeviceObject)=0, \old(Irp)=0, __cil_tmp10=131072, __cil_tmp11=147456, __cil_tmp12=147512, __cil_tmp8=56, __cil_tmp9=16384, compFptr=0, compRegistered=0, currentIrpStack__Parameters__DeviceIoControl__IoControlCode=147512, customIrp=0, DC=2, deviceExtension__TargetDeviceObject=0, DeviceObject=0, DeviceUsageTypePaging=1, Executive=0, IPC=7, Irp=0, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=0, pirp=0, routine=0, s=1, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, UNLOADED=0] [L1609] COND TRUE currentIrpStack__Parameters__DeviceIoControl__IoControlCode == __cil_tmp12 VAL [\old(DeviceObject)=0, \old(Irp)=0, __cil_tmp10=131072, __cil_tmp11=147456, __cil_tmp12=147512, __cil_tmp8=56, __cil_tmp9=16384, compFptr=0, compRegistered=0, currentIrpStack__Parameters__DeviceIoControl__IoControlCode=147512, customIrp=0, DC=2, deviceExtension__TargetDeviceObject=0, DeviceObject=0, DeviceUsageTypePaging=1, Executive=0, IPC=7, Irp=0, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=0, pirp=0, routine=0, s=1, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, UNLOADED=0] [L1610] COND FALSE !(s != NP) VAL [\old(DeviceObject)=0, \old(Irp)=0, __cil_tmp10=131072, __cil_tmp11=147456, __cil_tmp12=147512, __cil_tmp8=56, __cil_tmp9=16384, compFptr=0, compRegistered=0, currentIrpStack__Parameters__DeviceIoControl__IoControlCode=147512, customIrp=0, DC=2, deviceExtension__TargetDeviceObject=0, DeviceObject=0, DeviceUsageTypePaging=1, Executive=0, IPC=7, Irp=0, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=0, pirp=0, routine=0, s=1, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, UNLOADED=0] [L1615] COND FALSE !(compRegistered != 0) [L1620] compRegistered = 1 [L1621] routine = 0 VAL [\old(DeviceObject)=0, \old(Irp)=0, __cil_tmp10=131072, __cil_tmp11=147456, __cil_tmp12=147512, __cil_tmp8=56, __cil_tmp9=16384, compFptr=0, compRegistered=1, currentIrpStack__Parameters__DeviceIoControl__IoControlCode=147512, customIrp=0, DC=2, deviceExtension__TargetDeviceObject=0, DeviceObject=0, DeviceUsageTypePaging=1, Executive=0, IPC=7, Irp=0, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=0, pirp=0, routine=0, s=1, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, UNLOADED=0] [L1625] irpSp__Control = 224 VAL [\old(DeviceObject)=0, \old(Irp)=0, __cil_tmp10=131072, __cil_tmp11=147456, __cil_tmp12=147512, __cil_tmp8=56, __cil_tmp9=16384, compFptr=0, compRegistered=1, currentIrpStack__Parameters__DeviceIoControl__IoControlCode=147512, customIrp=0, DC=2, deviceExtension__TargetDeviceObject=0, DeviceObject=0, DeviceUsageTypePaging=1, Executive=0, IPC=7, Irp=0, irpSp__Control=224, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=0, pirp=0, routine=0, s=1, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, UNLOADED=0] [L1626] CALL, EXPR IofCallDriver(deviceExtension__TargetDeviceObject, Irp) VAL [\old(DeviceObject)=0, \old(Irp)=0, \old(lowerDriverReturn)=0, \old(pended)=0, \old(s)=1, \old(setEventCalled)=0, compFptr=0, compRegistered=1, customIrp=0, DC=2, DeviceUsageTypePaging=1, Executive=0, IPC=7, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=0, pirp=0, routine=0, s=1, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, UNLOADED=0] [L1900] int Irp__PendingReturned = __VERIFIER_nondet_int() ; [L1901] int returnVal2 ; [L1902] int compRetStatus ; [L1903] int lcontext = __VERIFIER_nondet_int() ; [L1904] unsigned long __cil_tmp8 ; VAL [\old(DeviceObject)=0, \old(Irp)=0, \old(lowerDriverReturn)=0, \old(pended)=0, \old(s)=1, \old(setEventCalled)=0, compFptr=0, compRegistered=1, customIrp=0, DC=2, DeviceObject=0, DeviceUsageTypePaging=1, Executive=0, IPC=7, Irp=0, Irp__PendingReturned=0, KernelMode=0, lcontext=-1, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=0, pirp=0, routine=0, s=1, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, UNLOADED=0] [L1907] COND TRUE \read(compRegistered) VAL [\old(DeviceObject)=0, \old(Irp)=0, \old(lowerDriverReturn)=0, \old(pended)=0, \old(s)=1, \old(setEventCalled)=0, compFptr=0, compRegistered=1, customIrp=0, DC=2, DeviceObject=0, DeviceUsageTypePaging=1, Executive=0, IPC=7, Irp=0, Irp__PendingReturned=0, KernelMode=0, lcontext=-1, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=0, pirp=0, routine=0, s=1, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, UNLOADED=0] [L1908] COND TRUE routine == 0 VAL [\old(DeviceObject)=0, \old(Irp)=0, \old(lowerDriverReturn)=0, \old(pended)=0, \old(s)=1, \old(setEventCalled)=0, compFptr=0, compRegistered=1, customIrp=0, DC=2, DeviceObject=0, DeviceUsageTypePaging=1, Executive=0, IPC=7, Irp=0, Irp__PendingReturned=0, KernelMode=0, lcontext=-1, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=0, pirp=0, routine=0, s=1, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, UNLOADED=0] [L1910] CALL, EXPR HPCdrCompletion(DeviceObject, Irp, lcontext) VAL [\old(Context)=-1, \old(DeviceObject)=0, \old(Irp)=0, \old(lowerDriverReturn)=0, \old(pended)=0, \old(s)=1, \old(setEventCalled)=0, compFptr=0, compRegistered=1, customIrp=0, DC=2, DeviceUsageTypePaging=1, Executive=0, IPC=7, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=0, pirp=0, routine=0, s=1, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, UNLOADED=0] [L1569] int Irp__PendingReturned = __VERIFIER_nondet_int() ; [L1570] int Irp__AssociatedIrp__SystemBuffer = __VERIFIER_nondet_int() ; [L1573] COND TRUE \read(Irp__PendingReturned) VAL [\old(Context)=-1, \old(DeviceObject)=0, \old(Irp)=0, \old(lowerDriverReturn)=0, \old(pended)=0, \old(s)=1, \old(setEventCalled)=0, compFptr=0, compRegistered=1, Context=-1, customIrp=0, DC=2, DeviceObject=0, DeviceUsageTypePaging=1, Executive=0, IPC=7, Irp=0, Irp__AssociatedIrp__SystemBuffer=0, Irp__PendingReturned=1, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=0, pirp=0, routine=0, s=1, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, UNLOADED=0] [L1574] COND TRUE pended == 0 [L1575] pended = 1 VAL [\old(Context)=-1, \old(DeviceObject)=0, \old(Irp)=0, \old(lowerDriverReturn)=0, \old(pended)=0, \old(s)=1, \old(setEventCalled)=0, compFptr=0, compRegistered=1, Context=-1, customIrp=0, DC=2, DeviceObject=0, DeviceUsageTypePaging=1, Executive=0, IPC=7, Irp=0, Irp__AssociatedIrp__SystemBuffer=0, Irp__PendingReturned=1, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=1, pirp=0, routine=0, s=1, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, UNLOADED=0] [L1582] COND FALSE !(myStatus >= 0) VAL [\old(Context)=-1, \old(DeviceObject)=0, \old(Irp)=0, \old(lowerDriverReturn)=0, \old(pended)=0, \old(s)=1, \old(setEventCalled)=0, compFptr=0, compRegistered=1, Context=-1, customIrp=0, DC=2, DeviceObject=0, DeviceUsageTypePaging=1, Executive=0, IPC=7, Irp=0, Irp__AssociatedIrp__SystemBuffer=0, Irp__PendingReturned=1, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=1, pirp=0, routine=0, s=1, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, UNLOADED=0] [L1587] return (myStatus); VAL [\old(Context)=-1, \old(DeviceObject)=0, \old(Irp)=0, \old(lowerDriverReturn)=0, \old(pended)=0, \old(s)=1, \old(setEventCalled)=0, \result=-1073741637, compFptr=0, compRegistered=1, Context=-1, customIrp=0, DC=2, DeviceObject=0, DeviceUsageTypePaging=1, Executive=0, IPC=7, Irp=0, Irp__AssociatedIrp__SystemBuffer=0, Irp__PendingReturned=1, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=1, pirp=0, routine=0, s=1, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, UNLOADED=0] [L1910] RET, EXPR HPCdrCompletion(DeviceObject, Irp, lcontext) VAL [\old(DeviceObject)=0, \old(Irp)=0, \old(lowerDriverReturn)=0, \old(pended)=0, \old(s)=1, \old(setEventCalled)=0, compFptr=0, compRegistered=1, customIrp=0, DC=2, DeviceObject=0, DeviceUsageTypePaging=1, Executive=0, HPCdrCompletion(DeviceObject, Irp, lcontext)=-1073741637, IPC=7, Irp=0, Irp__PendingReturned=0, KernelMode=0, lcontext=-1, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=1, pirp=0, routine=0, s=1, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, UNLOADED=0] [L1910] compRetStatus = HPCdrCompletion(DeviceObject, Irp, lcontext) [L1920] __cil_tmp8 = (unsigned long )compRetStatus VAL [\old(DeviceObject)=0, \old(Irp)=0, \old(lowerDriverReturn)=0, \old(pended)=0, \old(s)=1, \old(setEventCalled)=0, __cil_tmp8=3221225659, compFptr=0, compRegistered=1, compRetStatus=-1073741637, customIrp=0, DC=2, DeviceObject=0, DeviceUsageTypePaging=1, Executive=0, IPC=7, Irp=0, Irp__PendingReturned=0, KernelMode=0, lcontext=-1, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=1, pirp=0, routine=0, s=1, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, UNLOADED=0] [L1921] COND FALSE !(__cil_tmp8 == -1073741802) VAL [\old(DeviceObject)=0, \old(Irp)=0, \old(lowerDriverReturn)=0, \old(pended)=0, \old(s)=1, \old(setEventCalled)=0, __cil_tmp8=3221225659, compFptr=0, compRegistered=1, compRetStatus=-1073741637, customIrp=0, DC=2, DeviceObject=0, DeviceUsageTypePaging=1, Executive=0, IPC=7, Irp=0, Irp__PendingReturned=0, KernelMode=0, lcontext=-1, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=1, pirp=0, routine=0, s=1, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, UNLOADED=0] [L1928] COND FALSE !(\read(Irp__PendingReturned)) [L1931] int tmp_ndt_4; [L1932] tmp_ndt_4 = __VERIFIER_nondet_int() [L1933] COND TRUE tmp_ndt_4 == 0 VAL [\old(DeviceObject)=0, \old(Irp)=0, \old(lowerDriverReturn)=0, \old(pended)=0, \old(s)=1, \old(setEventCalled)=0, __cil_tmp8=3221225659, compFptr=0, compRegistered=1, compRetStatus=-1073741637, customIrp=0, DC=2, DeviceObject=0, DeviceUsageTypePaging=1, Executive=0, IPC=7, Irp=0, Irp__PendingReturned=0, KernelMode=0, lcontext=-1, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=1, pirp=0, routine=0, s=1, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, tmp_ndt_4=0, UNLOADED=0] [L1944] returnVal2 = 0 VAL [\old(DeviceObject)=0, \old(Irp)=0, \old(lowerDriverReturn)=0, \old(pended)=0, \old(s)=1, \old(setEventCalled)=0, __cil_tmp8=3221225659, compFptr=0, compRegistered=1, compRetStatus=-1073741637, customIrp=0, DC=2, DeviceObject=0, DeviceUsageTypePaging=1, Executive=0, IPC=7, Irp=0, Irp__PendingReturned=0, KernelMode=0, lcontext=-1, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=1, pirp=0, returnVal2=0, routine=0, s=1, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, tmp_ndt_4=0, UNLOADED=0] [L1958] COND TRUE s == NP [L1959] s = IPC [L1960] lowerDriverReturn = returnVal2 VAL [\old(DeviceObject)=0, \old(Irp)=0, \old(lowerDriverReturn)=0, \old(pended)=0, \old(s)=1, \old(setEventCalled)=0, __cil_tmp8=3221225659, compFptr=0, compRegistered=1, compRetStatus=-1073741637, customIrp=0, DC=2, DeviceObject=0, DeviceUsageTypePaging=1, Executive=0, IPC=7, Irp=0, Irp__PendingReturned=0, KernelMode=0, lcontext=-1, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=1, pirp=0, returnVal2=0, routine=0, s=7, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, tmp_ndt_4=0, UNLOADED=0] [L1981] return (returnVal2); VAL [\old(DeviceObject)=0, \old(Irp)=0, \old(lowerDriverReturn)=0, \old(pended)=0, \old(s)=1, \old(setEventCalled)=0, \result=0, __cil_tmp8=3221225659, compFptr=0, compRegistered=1, compRetStatus=-1073741637, customIrp=0, DC=2, DeviceObject=0, DeviceUsageTypePaging=1, Executive=0, IPC=7, Irp=0, Irp__PendingReturned=0, KernelMode=0, lcontext=-1, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=1, pirp=0, returnVal2=0, routine=0, s=7, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, tmp_ndt_4=0, UNLOADED=0] [L1626] RET, EXPR IofCallDriver(deviceExtension__TargetDeviceObject, Irp) VAL [\old(DeviceObject)=0, \old(Irp)=0, __cil_tmp10=131072, __cil_tmp11=147456, __cil_tmp12=147512, __cil_tmp8=56, __cil_tmp9=16384, compFptr=0, compRegistered=1, currentIrpStack__Parameters__DeviceIoControl__IoControlCode=147512, customIrp=0, DC=2, deviceExtension__TargetDeviceObject=0, DeviceObject=0, DeviceUsageTypePaging=1, Executive=0, IofCallDriver(deviceExtension__TargetDeviceObject, Irp)=0, IPC=7, Irp=0, irpSp__Control=224, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=1, pirp=0, routine=0, s=7, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, UNLOADED=0] [L1626] tmp = IofCallDriver(deviceExtension__TargetDeviceObject, Irp) [L1628] return (tmp); VAL [\old(DeviceObject)=0, \old(Irp)=0, \result=0, __cil_tmp10=131072, __cil_tmp11=147456, __cil_tmp12=147512, __cil_tmp8=56, __cil_tmp9=16384, compFptr=0, compRegistered=1, currentIrpStack__Parameters__DeviceIoControl__IoControlCode=147512, customIrp=0, DC=2, deviceExtension__TargetDeviceObject=0, DeviceObject=0, DeviceUsageTypePaging=1, Executive=0, IPC=7, Irp=0, irpSp__Control=224, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=1, pirp=0, routine=0, s=7, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, tmp=0, UNLOADED=0] [L348] RET, EXPR CdAudioHPCdrDeviceControl(DeviceObject, Irp) [L348] status = CdAudioHPCdrDeviceControl(DeviceObject, Irp) [L363] return (status); VAL [\old(DeviceObject)=0, \old(Irp)=0, \result=0, compFptr=0, compRegistered=1, customIrp=0, DC=2, deviceExtension__Active=7, DeviceObject=0, DeviceUsageTypePaging=1, Executive=0, IPC=7, Irp=0, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=1, pirp=0, routine=0, s=7, setEventCalled=0, SKIP1=3, SKIP2=4, status=0, Suspended=5, UNLOADED=0] [L1798] RET, EXPR CdAudioDeviceControl(devobj, pirp) [L1798] status = CdAudioDeviceControl(devobj, pirp) [L1819] COND FALSE !(\read(we_should_unload)) VAL [compFptr=0, compRegistered=1, customIrp=0, d=0, DC=2, DeviceUsageTypePaging=1, devobj=0, Executive=0, IPC=7, irp=0, irp_choice=0, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=1, pirp=0, pirp__IoStatus__Status=-1073741637, routine=0, s=7, setEventCalled=0, SKIP1=3, SKIP2=4, status=0, Suspended=5, tmp_ndt_1=2, UNLOADED=0, we_should_unload=0] [L1825] COND TRUE pended == 1 VAL [compFptr=0, compRegistered=1, customIrp=0, d=0, DC=2, DeviceUsageTypePaging=1, devobj=0, Executive=0, IPC=7, irp=0, irp_choice=0, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=1, pirp=0, pirp__IoStatus__Status=-1073741637, routine=0, s=7, setEventCalled=0, SKIP1=3, SKIP2=4, status=0, Suspended=5, tmp_ndt_1=2, UNLOADED=0, we_should_unload=0] [L1826] COND FALSE !(s == NP) VAL [compFptr=0, compRegistered=1, customIrp=0, d=0, DC=2, DeviceUsageTypePaging=1, devobj=0, Executive=0, IPC=7, irp=0, irp_choice=0, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=1, pirp=0, pirp__IoStatus__Status=-1073741637, routine=0, s=7, setEventCalled=0, SKIP1=3, SKIP2=4, status=0, Suspended=5, tmp_ndt_1=2, UNLOADED=0, we_should_unload=0] [L1833] COND TRUE pended == 1 VAL [compFptr=0, compRegistered=1, customIrp=0, d=0, DC=2, DeviceUsageTypePaging=1, devobj=0, Executive=0, IPC=7, irp=0, irp_choice=0, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=1, pirp=0, pirp__IoStatus__Status=-1073741637, routine=0, s=7, setEventCalled=0, SKIP1=3, SKIP2=4, status=0, Suspended=5, tmp_ndt_1=2, UNLOADED=0, we_should_unload=0] [L1834] COND FALSE !(s == MPR3) VAL [compFptr=0, compRegistered=1, customIrp=0, d=0, DC=2, DeviceUsageTypePaging=1, devobj=0, Executive=0, IPC=7, irp=0, irp_choice=0, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=1, pirp=0, pirp__IoStatus__Status=-1073741637, routine=0, s=7, setEventCalled=0, SKIP1=3, SKIP2=4, status=0, Suspended=5, tmp_ndt_1=2, UNLOADED=0, we_should_unload=0] [L1841] COND TRUE s != UNLOADED VAL [compFptr=0, compRegistered=1, customIrp=0, d=0, DC=2, DeviceUsageTypePaging=1, devobj=0, Executive=0, IPC=7, irp=0, irp_choice=0, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=1, pirp=0, pirp__IoStatus__Status=-1073741637, routine=0, s=7, setEventCalled=0, SKIP1=3, SKIP2=4, status=0, Suspended=5, tmp_ndt_1=2, UNLOADED=0, we_should_unload=0] [L1842] COND TRUE status != -1 VAL [compFptr=0, compRegistered=1, customIrp=0, d=0, DC=2, DeviceUsageTypePaging=1, devobj=0, Executive=0, IPC=7, irp=0, irp_choice=0, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=1, pirp=0, pirp__IoStatus__Status=-1073741637, routine=0, s=7, setEventCalled=0, SKIP1=3, SKIP2=4, status=0, Suspended=5, tmp_ndt_1=2, UNLOADED=0, we_should_unload=0] [L1843] COND TRUE s != SKIP2 VAL [compFptr=0, compRegistered=1, customIrp=0, d=0, DC=2, DeviceUsageTypePaging=1, devobj=0, Executive=0, IPC=7, irp=0, irp_choice=0, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=1, pirp=0, pirp__IoStatus__Status=-1073741637, routine=0, s=7, setEventCalled=0, SKIP1=3, SKIP2=4, status=0, Suspended=5, tmp_ndt_1=2, UNLOADED=0, we_should_unload=0] [L1844] COND FALSE !(s != IPC) VAL [compFptr=0, compRegistered=1, customIrp=0, d=0, DC=2, DeviceUsageTypePaging=1, devobj=0, Executive=0, IPC=7, irp=0, irp_choice=0, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=1, pirp=0, pirp__IoStatus__Status=-1073741637, routine=0, s=7, setEventCalled=0, SKIP1=3, SKIP2=4, status=0, Suspended=5, tmp_ndt_1=2, UNLOADED=0, we_should_unload=0] [L1857] COND FALSE !(pended != 1) VAL [compFptr=0, compRegistered=1, customIrp=0, d=0, DC=2, DeviceUsageTypePaging=1, devobj=0, Executive=0, IPC=7, irp=0, irp_choice=0, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=1, pirp=0, pirp__IoStatus__Status=-1073741637, routine=0, s=7, setEventCalled=0, SKIP1=3, SKIP2=4, status=0, Suspended=5, tmp_ndt_1=2, UNLOADED=0, we_should_unload=0] [L1869] COND TRUE status != 259 VAL [compFptr=0, compRegistered=1, customIrp=0, d=0, DC=2, DeviceUsageTypePaging=1, devobj=0, Executive=0, IPC=7, irp=0, irp_choice=0, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=1, pirp=0, pirp__IoStatus__Status=-1073741637, routine=0, s=7, setEventCalled=0, SKIP1=3, SKIP2=4, status=0, Suspended=5, tmp_ndt_1=2, UNLOADED=0, we_should_unload=0] [L1871] CALL errorFn() VAL [compFptr=0, compRegistered=1, customIrp=0, DC=2, DeviceUsageTypePaging=1, Executive=0, IPC=7, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=1, pirp=0, routine=0, s=7, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, UNLOADED=0] [L59] reach_error() VAL [compFptr=0, compRegistered=1, customIrp=0, DC=2, DeviceUsageTypePaging=1, Executive=0, IPC=7, KernelMode=0, lowerDriverReturn=0, MPR1=5, MPR3=6, myStatus=-1073741637, NP=1, pended=1, pirp=0, routine=0, s=7, setEventCalled=0, SKIP1=3, SKIP2=4, Suspended=5, UNLOADED=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 14 procedures, 470 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 31.8s, OverallIterations: 68, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 24.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 21672 SdHoareTripleChecker+Valid, 18.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 21344 mSDsluCounter, 164538 SdHoareTripleChecker+Invalid, 15.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 129396 mSDsCounter, 5724 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 37673 IncrementalHoareTripleChecker+Invalid, 43397 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5724 mSolverCounterUnsat, 35142 mSDtfsCounter, 37673 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1098 GetRequests, 424 SyntacticMatches, 10 SemanticMatches, 664 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=821occurred in iteration=4, InterpolantAutomatonStates: 598, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.1s AutomataMinimizationTime, 67 MinimizatonAttempts, 2265 StatesRemovedByMinimization, 46 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 3221 NumberOfCodeBlocks, 3221 NumberOfCodeBlocksAsserted, 69 NumberOfCheckSat, 3158 ConstructedInterpolants, 0 QuantifiedInterpolants, 8979 SizeOfPredicates, 4 NumberOfNonLiveVariables, 471 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 69 InterpolantComputations, 67 PerfectInterpolantSequences, 12/15 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-12-21 10:19:34,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE