./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ad0884018313fc350052496ea1071e31a8b2c3997d36767afc87946a21697816 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 11:10:50,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 11:10:50,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 11:10:50,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 11:10:50,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 11:10:50,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 11:10:50,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 11:10:50,454 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 11:10:50,456 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 11:10:50,460 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 11:10:50,461 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 11:10:50,463 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 11:10:50,463 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 11:10:50,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 11:10:50,467 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 11:10:50,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 11:10:50,469 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 11:10:50,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 11:10:50,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 11:10:50,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 11:10:50,473 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 11:10:50,474 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 11:10:50,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 11:10:50,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 11:10:50,477 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 11:10:50,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 11:10:50,484 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 11:10:50,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 11:10:50,485 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 11:10:50,486 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 11:10:50,486 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 11:10:50,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 11:10:50,488 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 11:10:50,489 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 11:10:50,489 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 11:10:50,490 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 11:10:50,490 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 11:10:50,492 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 11:10:50,492 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 11:10:50,492 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 11:10:50,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 11:10:50,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 11:10:50,496 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 11:10:50,525 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 11:10:50,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 11:10:50,526 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 11:10:50,526 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 11:10:50,527 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 11:10:50,527 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 11:10:50,528 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 11:10:50,528 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 11:10:50,528 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 11:10:50,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 11:10:50,529 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 11:10:50,530 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 11:10:50,530 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 11:10:50,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 11:10:50,530 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 11:10:50,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 11:10:50,530 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 11:10:50,531 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 11:10:50,531 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 11:10:50,531 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 11:10:50,532 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 11:10:50,532 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 11:10:50,532 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 11:10:50,532 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 11:10:50,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:10:50,533 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 11:10:50,533 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 11:10:50,533 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 11:10:50,533 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 11:10:50,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 11:10:50,534 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 11:10:50,534 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 11:10:50,534 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 11:10:50,534 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad0884018313fc350052496ea1071e31a8b2c3997d36767afc87946a21697816 [2022-07-22 11:10:50,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 11:10:50,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 11:10:50,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 11:10:50,788 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 11:10:50,788 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 11:10:50,790 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c [2022-07-22 11:10:50,873 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2251a9f07/f94feb0a691a4e4f985a60690f4a6cca/FLAGaec87f45c [2022-07-22 11:10:51,534 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 11:10:51,534 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c [2022-07-22 11:10:51,576 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2251a9f07/f94feb0a691a4e4f985a60690f4a6cca/FLAGaec87f45c [2022-07-22 11:10:51,886 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2251a9f07/f94feb0a691a4e4f985a60690f4a6cca [2022-07-22 11:10:51,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 11:10:51,889 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 11:10:51,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 11:10:51,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 11:10:51,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 11:10:51,894 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:10:51" (1/1) ... [2022-07-22 11:10:51,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@629a7c2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:10:51, skipping insertion in model container [2022-07-22 11:10:51,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:10:51" (1/1) ... [2022-07-22 11:10:51,901 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 11:10:52,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 11:10:52,555 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c[90162,90175] [2022-07-22 11:10:53,190 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:10:53,199 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 11:10:53,268 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c[90162,90175] [2022-07-22 11:10:53,566 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:10:53,592 INFO L208 MainTranslator]: Completed translation [2022-07-22 11:10:53,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:10:53 WrapperNode [2022-07-22 11:10:53,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 11:10:53,594 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 11:10:53,594 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 11:10:53,594 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 11:10:53,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:10:53" (1/1) ... [2022-07-22 11:10:53,684 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:10:53" (1/1) ... [2022-07-22 11:10:53,773 INFO L137 Inliner]: procedures = 120, calls = 2195, calls flagged for inlining = 23, calls inlined = 19, statements flattened = 2336 [2022-07-22 11:10:53,774 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 11:10:53,775 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 11:10:53,775 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 11:10:53,775 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 11:10:53,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:10:53" (1/1) ... [2022-07-22 11:10:53,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:10:53" (1/1) ... [2022-07-22 11:10:53,828 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:10:53" (1/1) ... [2022-07-22 11:10:53,830 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:10:53" (1/1) ... [2022-07-22 11:10:53,916 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:10:53" (1/1) ... [2022-07-22 11:10:53,938 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:10:53" (1/1) ... [2022-07-22 11:10:53,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:10:53" (1/1) ... [2022-07-22 11:10:53,972 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 11:10:53,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 11:10:53,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 11:10:53,973 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 11:10:53,981 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:10:53" (1/1) ... [2022-07-22 11:10:53,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:10:53,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:10:54,013 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 11:10:54,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 11:10:54,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-07-22 11:10:54,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-07-22 11:10:54,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-22 11:10:54,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 11:10:54,055 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-07-22 11:10:54,055 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-07-22 11:10:54,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-07-22 11:10:54,056 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-07-22 11:10:54,056 INFO L130 BoogieDeclarations]: Found specification of procedure MmLockPagableDataSection [2022-07-22 11:10:54,056 INFO L138 BoogieDeclarations]: Found implementation of procedure MmLockPagableDataSection [2022-07-22 11:10:54,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 11:10:54,056 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2022-07-22 11:10:54,056 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2022-07-22 11:10:54,056 INFO L130 BoogieDeclarations]: Found specification of procedure IoOpenDeviceRegistryKey [2022-07-22 11:10:54,057 INFO L138 BoogieDeclarations]: Found implementation of procedure IoOpenDeviceRegistryKey [2022-07-22 11:10:54,057 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-07-22 11:10:54,057 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-07-22 11:10:54,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-22 11:10:54,057 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-22 11:10:54,057 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_malloc [2022-07-22 11:10:54,057 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_malloc [2022-07-22 11:10:54,058 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-07-22 11:10:54,058 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-07-22 11:10:54,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 11:10:54,058 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-07-22 11:10:54,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-07-22 11:10:54,058 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2022-07-22 11:10:54,058 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2022-07-22 11:10:54,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 11:10:54,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-22 11:10:54,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 11:10:54,059 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-07-22 11:10:54,059 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-07-22 11:10:54,059 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-07-22 11:10:54,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-22 11:10:54,059 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-07-22 11:10:54,060 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-07-22 11:10:54,060 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2022-07-22 11:10:54,060 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2022-07-22 11:10:54,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 11:10:54,060 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-07-22 11:10:54,060 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-07-22 11:10:54,061 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2022-07-22 11:10:54,061 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2022-07-22 11:10:54,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 11:10:54,061 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2022-07-22 11:10:54,061 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2022-07-22 11:10:54,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-07-22 11:10:54,061 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2022-07-22 11:10:54,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2022-07-22 11:10:54,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 11:10:54,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 11:10:54,063 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2022-07-22 11:10:54,063 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2022-07-22 11:10:54,528 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 11:10:54,531 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 11:10:54,723 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:10:54,740 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-07-22 11:10:54,740 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-07-22 11:10:55,139 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:10:55,171 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-07-22 11:10:55,171 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-07-22 11:10:55,188 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:10:55,188 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:10:55,190 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:10:55,196 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:10:55,203 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:10:55,214 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:11:07,504 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##276: assume false; [2022-07-22 11:11:07,504 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##277: assume !false; [2022-07-22 11:11:07,504 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##504: assume !false; [2022-07-22 11:11:07,504 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##503: assume false; [2022-07-22 11:11:07,504 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint L3709: CdAudioPnp_#res#1 := 0; [2022-07-22 11:11:07,505 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##172: assume !false; [2022-07-22 11:11:07,505 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##171: assume false; [2022-07-22 11:11:07,505 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##65: assume !false; [2022-07-22 11:11:07,505 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##64: assume false; [2022-07-22 11:11:07,505 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##43: assume !false; [2022-07-22 11:11:07,505 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##42: assume false; [2022-07-22 11:11:07,505 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##32: assume false; [2022-07-22 11:11:07,505 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##33: assume !false; [2022-07-22 11:11:07,531 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:11:07,535 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-07-22 11:11:07,535 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-07-22 11:11:07,548 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 11:11:07,559 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 11:11:07,560 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-22 11:11:07,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:11:07 BoogieIcfgContainer [2022-07-22 11:11:07,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 11:11:07,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 11:11:07,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 11:11:07,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 11:11:07,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 11:10:51" (1/3) ... [2022-07-22 11:11:07,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f93872c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:11:07, skipping insertion in model container [2022-07-22 11:11:07,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:10:53" (2/3) ... [2022-07-22 11:11:07,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f93872c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:11:07, skipping insertion in model container [2022-07-22 11:11:07,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:11:07" (3/3) ... [2022-07-22 11:11:07,570 INFO L111 eAbstractionObserver]: Analyzing ICFG cdaudio.i.cil-1.c [2022-07-22 11:11:07,581 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 11:11:07,581 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 11:11:07,631 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 11:11:07,637 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@35211a5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1298e1e8 [2022-07-22 11:11:07,637 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 11:11:07,642 INFO L276 IsEmpty]: Start isEmpty. Operand has 625 states, 491 states have (on average 1.5274949083503055) internal successors, (750), 510 states have internal predecessors, (750), 113 states have call successors, (113), 19 states have call predecessors, (113), 19 states have return successors, (113), 108 states have call predecessors, (113), 113 states have call successors, (113) [2022-07-22 11:11:07,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-22 11:11:07,649 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:07,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:11:07,650 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:07,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:07,653 INFO L85 PathProgramCache]: Analyzing trace with hash 678118687, now seen corresponding path program 1 times [2022-07-22 11:11:07,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:07,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914695406] [2022-07-22 11:11:07,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:07,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:07,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:07,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:07,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914695406] [2022-07-22 11:11:07,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914695406] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:07,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:07,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 11:11:07,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811480341] [2022-07-22 11:11:07,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:07,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 11:11:07,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:08,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 11:11:08,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 11:11:08,032 INFO L87 Difference]: Start difference. First operand has 625 states, 491 states have (on average 1.5274949083503055) internal successors, (750), 510 states have internal predecessors, (750), 113 states have call successors, (113), 19 states have call predecessors, (113), 19 states have return successors, (113), 108 states have call predecessors, (113), 113 states have call successors, (113) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:08,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:08,158 INFO L93 Difference]: Finished difference Result 1244 states and 1994 transitions. [2022-07-22 11:11:08,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 11:11:08,160 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-22 11:11:08,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:08,174 INFO L225 Difference]: With dead ends: 1244 [2022-07-22 11:11:08,174 INFO L226 Difference]: Without dead ends: 618 [2022-07-22 11:11:08,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 11:11:08,189 INFO L413 NwaCegarLoop]: 943 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:08,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:11:08,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-07-22 11:11:08,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2022-07-22 11:11:08,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 486 states have (on average 1.4835390946502058) internal successors, (721), 503 states have internal predecessors, (721), 113 states have call successors, (113), 19 states have call predecessors, (113), 18 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2022-07-22 11:11:08,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 931 transitions. [2022-07-22 11:11:08,268 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 931 transitions. Word has length 19 [2022-07-22 11:11:08,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:08,269 INFO L495 AbstractCegarLoop]: Abstraction has 618 states and 931 transitions. [2022-07-22 11:11:08,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:08,269 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 931 transitions. [2022-07-22 11:11:08,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-22 11:11:08,270 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:08,270 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:11:08,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 11:11:08,271 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:08,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:08,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1841730419, now seen corresponding path program 1 times [2022-07-22 11:11:08,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:08,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402117654] [2022-07-22 11:11:08,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:08,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:08,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:08,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:08,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402117654] [2022-07-22 11:11:08,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402117654] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:08,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:08,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:11:08,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360646772] [2022-07-22 11:11:08,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:08,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:11:08,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:08,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:11:08,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:11:08,412 INFO L87 Difference]: Start difference. First operand 618 states and 931 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:08,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:08,505 INFO L93 Difference]: Finished difference Result 637 states and 956 transitions. [2022-07-22 11:11:08,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:11:08,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-22 11:11:08,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:08,510 INFO L225 Difference]: With dead ends: 637 [2022-07-22 11:11:08,510 INFO L226 Difference]: Without dead ends: 618 [2022-07-22 11:11:08,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:11:08,512 INFO L413 NwaCegarLoop]: 929 mSDtfsCounter, 16 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1797 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:08,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 1797 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:11:08,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-07-22 11:11:08,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2022-07-22 11:11:08,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 486 states have (on average 1.4814814814814814) internal successors, (720), 503 states have internal predecessors, (720), 113 states have call successors, (113), 19 states have call predecessors, (113), 18 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2022-07-22 11:11:08,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 930 transitions. [2022-07-22 11:11:08,547 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 930 transitions. Word has length 19 [2022-07-22 11:11:08,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:08,547 INFO L495 AbstractCegarLoop]: Abstraction has 618 states and 930 transitions. [2022-07-22 11:11:08,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:08,548 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 930 transitions. [2022-07-22 11:11:08,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-22 11:11:08,548 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:08,549 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:11:08,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 11:11:08,549 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:08,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:08,550 INFO L85 PathProgramCache]: Analyzing trace with hash -948115898, now seen corresponding path program 1 times [2022-07-22 11:11:08,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:08,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270531511] [2022-07-22 11:11:08,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:08,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:08,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:08,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:08,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:08,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270531511] [2022-07-22 11:11:08,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270531511] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:08,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:08,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:11:08,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005590298] [2022-07-22 11:11:08,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:08,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:11:08,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:08,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:11:08,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:11:08,652 INFO L87 Difference]: Start difference. First operand 618 states and 930 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:08,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:08,789 INFO L93 Difference]: Finished difference Result 1147 states and 1711 transitions. [2022-07-22 11:11:08,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:11:08,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-22 11:11:08,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:08,796 INFO L225 Difference]: With dead ends: 1147 [2022-07-22 11:11:08,797 INFO L226 Difference]: Without dead ends: 898 [2022-07-22 11:11:08,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:11:08,799 INFO L413 NwaCegarLoop]: 1250 mSDtfsCounter, 844 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 1674 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:08,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [844 Valid, 1674 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:11:08,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-07-22 11:11:08,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 879. [2022-07-22 11:11:08,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 704 states have (on average 1.4602272727272727) internal successors, (1028), 707 states have internal predecessors, (1028), 142 states have call successors, (142), 33 states have call predecessors, (142), 32 states have return successors, (146), 140 states have call predecessors, (146), 130 states have call successors, (146) [2022-07-22 11:11:08,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1316 transitions. [2022-07-22 11:11:08,842 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1316 transitions. Word has length 21 [2022-07-22 11:11:08,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:08,843 INFO L495 AbstractCegarLoop]: Abstraction has 879 states and 1316 transitions. [2022-07-22 11:11:08,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:08,843 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1316 transitions. [2022-07-22 11:11:08,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 11:11:08,849 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:08,849 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:11:08,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 11:11:08,850 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:08,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:08,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1453767215, now seen corresponding path program 1 times [2022-07-22 11:11:08,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:08,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258086192] [2022-07-22 11:11:08,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:08,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:08,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:08,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:08,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:08,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258086192] [2022-07-22 11:11:08,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258086192] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:08,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:08,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:11:08,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575113399] [2022-07-22 11:11:08,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:08,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:11:08,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:08,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:11:08,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:11:08,960 INFO L87 Difference]: Start difference. First operand 879 states and 1316 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:09,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:09,091 INFO L93 Difference]: Finished difference Result 1871 states and 2863 transitions. [2022-07-22 11:11:09,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:11:09,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-22 11:11:09,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:09,100 INFO L225 Difference]: With dead ends: 1871 [2022-07-22 11:11:09,101 INFO L226 Difference]: Without dead ends: 1460 [2022-07-22 11:11:09,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:11:09,103 INFO L413 NwaCegarLoop]: 1461 mSDtfsCounter, 585 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 2337 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:09,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 2337 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:11:09,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2022-07-22 11:11:09,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1058. [2022-07-22 11:11:09,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 841 states have (on average 1.44589774078478) internal successors, (1216), 843 states have internal predecessors, (1216), 170 states have call successors, (170), 46 states have call predecessors, (170), 46 states have return successors, (217), 170 states have call predecessors, (217), 158 states have call successors, (217) [2022-07-22 11:11:09,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 1603 transitions. [2022-07-22 11:11:09,146 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 1603 transitions. Word has length 28 [2022-07-22 11:11:09,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:09,147 INFO L495 AbstractCegarLoop]: Abstraction has 1058 states and 1603 transitions. [2022-07-22 11:11:09,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:09,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 1603 transitions. [2022-07-22 11:11:09,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 11:11:09,148 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:09,148 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:11:09,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 11:11:09,149 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:09,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:09,149 INFO L85 PathProgramCache]: Analyzing trace with hash -720563744, now seen corresponding path program 1 times [2022-07-22 11:11:09,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:09,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566271407] [2022-07-22 11:11:09,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:09,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:09,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:09,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:09,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566271407] [2022-07-22 11:11:09,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566271407] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:09,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:09,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:11:09,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440373457] [2022-07-22 11:11:09,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:09,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:11:09,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:09,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:11:09,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:11:09,287 INFO L87 Difference]: Start difference. First operand 1058 states and 1603 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:09,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:09,343 INFO L93 Difference]: Finished difference Result 1734 states and 2579 transitions. [2022-07-22 11:11:09,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:11:09,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-22 11:11:09,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:09,352 INFO L225 Difference]: With dead ends: 1734 [2022-07-22 11:11:09,352 INFO L226 Difference]: Without dead ends: 1602 [2022-07-22 11:11:09,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:11:09,354 INFO L413 NwaCegarLoop]: 1145 mSDtfsCounter, 847 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 1553 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:09,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [847 Valid, 1553 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:11:09,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1602 states. [2022-07-22 11:11:09,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1602 to 1541. [2022-07-22 11:11:09,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1541 states, 1237 states have (on average 1.4470493128536783) internal successors, (1790), 1235 states have internal predecessors, (1790), 227 states have call successors, (227), 72 states have call predecessors, (227), 76 states have return successors, (298), 233 states have call predecessors, (298), 218 states have call successors, (298) [2022-07-22 11:11:09,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1541 states to 1541 states and 2315 transitions. [2022-07-22 11:11:09,418 INFO L78 Accepts]: Start accepts. Automaton has 1541 states and 2315 transitions. Word has length 28 [2022-07-22 11:11:09,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:09,419 INFO L495 AbstractCegarLoop]: Abstraction has 1541 states and 2315 transitions. [2022-07-22 11:11:09,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:09,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states and 2315 transitions. [2022-07-22 11:11:09,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-22 11:11:09,420 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:09,420 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:11:09,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 11:11:09,421 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:09,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:09,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1878054380, now seen corresponding path program 1 times [2022-07-22 11:11:09,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:09,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578421266] [2022-07-22 11:11:09,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:09,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:09,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:09,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:09,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:09,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578421266] [2022-07-22 11:11:09,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578421266] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:09,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:09,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:11:09,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292927781] [2022-07-22 11:11:09,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:09,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:11:09,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:09,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:11:09,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:11:09,504 INFO L87 Difference]: Start difference. First operand 1541 states and 2315 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:10,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:10,099 INFO L93 Difference]: Finished difference Result 2750 states and 4167 transitions. [2022-07-22 11:11:10,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:11:10,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-22 11:11:10,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:10,108 INFO L225 Difference]: With dead ends: 2750 [2022-07-22 11:11:10,109 INFO L226 Difference]: Without dead ends: 1839 [2022-07-22 11:11:10,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:11:10,112 INFO L413 NwaCegarLoop]: 1174 mSDtfsCounter, 1438 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1440 SdHoareTripleChecker+Valid, 1496 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:10,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1440 Valid, 1496 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:11:10,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2022-07-22 11:11:10,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1529. [2022-07-22 11:11:10,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1227 states have (on average 1.4441727791361043) internal successors, (1772), 1225 states have internal predecessors, (1772), 225 states have call successors, (225), 70 states have call predecessors, (225), 76 states have return successors, (294), 233 states have call predecessors, (294), 216 states have call successors, (294) [2022-07-22 11:11:10,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 2291 transitions. [2022-07-22 11:11:10,225 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 2291 transitions. Word has length 29 [2022-07-22 11:11:10,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:10,226 INFO L495 AbstractCegarLoop]: Abstraction has 1529 states and 2291 transitions. [2022-07-22 11:11:10,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:10,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 2291 transitions. [2022-07-22 11:11:10,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 11:11:10,227 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:10,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:11:10,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 11:11:10,228 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:10,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:10,228 INFO L85 PathProgramCache]: Analyzing trace with hash 322594645, now seen corresponding path program 1 times [2022-07-22 11:11:10,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:10,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400819486] [2022-07-22 11:11:10,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:10,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:10,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:10,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:10,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:10,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400819486] [2022-07-22 11:11:10,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400819486] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:10,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:10,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:11:10,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217440363] [2022-07-22 11:11:10,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:10,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:11:10,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:10,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:11:10,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:11:10,292 INFO L87 Difference]: Start difference. First operand 1529 states and 2291 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:10,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:10,364 INFO L93 Difference]: Finished difference Result 1532 states and 2293 transitions. [2022-07-22 11:11:10,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:11:10,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-22 11:11:10,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:10,372 INFO L225 Difference]: With dead ends: 1532 [2022-07-22 11:11:10,372 INFO L226 Difference]: Without dead ends: 1528 [2022-07-22 11:11:10,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:11:10,373 INFO L413 NwaCegarLoop]: 889 mSDtfsCounter, 34 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1721 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:10,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 1721 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:11:10,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2022-07-22 11:11:10,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1528. [2022-07-22 11:11:10,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1227 states have (on average 1.4425427872860637) internal successors, (1770), 1224 states have internal predecessors, (1770), 224 states have call successors, (224), 70 states have call predecessors, (224), 76 states have return successors, (294), 233 states have call predecessors, (294), 216 states have call successors, (294) [2022-07-22 11:11:10,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 2288 transitions. [2022-07-22 11:11:10,426 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 2288 transitions. Word has length 28 [2022-07-22 11:11:10,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:10,426 INFO L495 AbstractCegarLoop]: Abstraction has 1528 states and 2288 transitions. [2022-07-22 11:11:10,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:10,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 2288 transitions. [2022-07-22 11:11:10,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-22 11:11:10,428 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:10,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:11:10,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 11:11:10,429 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:10,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:10,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1553595828, now seen corresponding path program 1 times [2022-07-22 11:11:10,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:10,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690169964] [2022-07-22 11:11:10,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:10,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:10,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:10,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 11:11:10,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:10,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:10,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690169964] [2022-07-22 11:11:10,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690169964] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:10,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:10,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:11:10,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190406216] [2022-07-22 11:11:10,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:10,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:11:10,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:10,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:11:10,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:11:10,534 INFO L87 Difference]: Start difference. First operand 1528 states and 2288 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 11:11:15,513 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:16,904 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:19,883 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:21,987 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:24,073 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:25,572 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:25,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:25,642 INFO L93 Difference]: Finished difference Result 2372 states and 3499 transitions. [2022-07-22 11:11:25,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 11:11:25,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-07-22 11:11:25,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:25,650 INFO L225 Difference]: With dead ends: 2372 [2022-07-22 11:11:25,650 INFO L226 Difference]: Without dead ends: 1287 [2022-07-22 11:11:25,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-22 11:11:25,653 INFO L413 NwaCegarLoop]: 995 mSDtfsCounter, 791 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 283 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 2618 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:25,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [794 Valid, 2618 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 485 Invalid, 4 Unknown, 0 Unchecked, 15.0s Time] [2022-07-22 11:11:25,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2022-07-22 11:11:25,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1145. [2022-07-22 11:11:25,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 920 states have (on average 1.4217391304347826) internal successors, (1308), 919 states have internal predecessors, (1308), 163 states have call successors, (163), 55 states have call predecessors, (163), 61 states have return successors, (215), 170 states have call predecessors, (215), 155 states have call successors, (215) [2022-07-22 11:11:25,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 1686 transitions. [2022-07-22 11:11:25,709 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 1686 transitions. Word has length 41 [2022-07-22 11:11:25,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:25,709 INFO L495 AbstractCegarLoop]: Abstraction has 1145 states and 1686 transitions. [2022-07-22 11:11:25,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 11:11:25,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 1686 transitions. [2022-07-22 11:11:25,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-22 11:11:25,711 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:25,712 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:11:25,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 11:11:25,712 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:25,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:25,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1070706914, now seen corresponding path program 1 times [2022-07-22 11:11:25,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:25,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185971622] [2022-07-22 11:11:25,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:25,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:25,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:25,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185971622] [2022-07-22 11:11:25,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185971622] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:25,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:25,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:11:25,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438385523] [2022-07-22 11:11:25,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:25,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:11:25,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:25,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:11:25,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:11:25,839 INFO L87 Difference]: Start difference. First operand 1145 states and 1686 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:26,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:26,231 INFO L93 Difference]: Finished difference Result 1206 states and 1766 transitions. [2022-07-22 11:11:26,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:11:26,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-22 11:11:26,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:26,238 INFO L225 Difference]: With dead ends: 1206 [2022-07-22 11:11:26,238 INFO L226 Difference]: Without dead ends: 1162 [2022-07-22 11:11:26,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:11:26,241 INFO L413 NwaCegarLoop]: 885 mSDtfsCounter, 922 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 1546 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:26,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [922 Valid, 1546 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 11:11:26,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2022-07-22 11:11:26,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1145. [2022-07-22 11:11:26,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 920 states have (on average 1.4195652173913043) internal successors, (1306), 919 states have internal predecessors, (1306), 163 states have call successors, (163), 55 states have call predecessors, (163), 61 states have return successors, (215), 170 states have call predecessors, (215), 155 states have call successors, (215) [2022-07-22 11:11:26,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 1684 transitions. [2022-07-22 11:11:26,294 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 1684 transitions. Word has length 37 [2022-07-22 11:11:26,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:26,296 INFO L495 AbstractCegarLoop]: Abstraction has 1145 states and 1684 transitions. [2022-07-22 11:11:26,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:26,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 1684 transitions. [2022-07-22 11:11:26,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-22 11:11:26,299 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:26,299 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:11:26,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 11:11:26,300 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:26,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:26,300 INFO L85 PathProgramCache]: Analyzing trace with hash -117279878, now seen corresponding path program 1 times [2022-07-22 11:11:26,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:26,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631200443] [2022-07-22 11:11:26,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:26,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:26,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-22 11:11:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:26,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:26,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:26,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631200443] [2022-07-22 11:11:26,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631200443] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:26,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:26,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:11:26,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673582319] [2022-07-22 11:11:26,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:26,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:11:26,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:26,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:11:26,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:11:26,446 INFO L87 Difference]: Start difference. First operand 1145 states and 1684 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 11:11:30,170 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:32,324 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:34,342 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:36,681 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:38,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:38,397 INFO L93 Difference]: Finished difference Result 1841 states and 2715 transitions. [2022-07-22 11:11:38,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:11:38,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-07-22 11:11:38,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:38,404 INFO L225 Difference]: With dead ends: 1841 [2022-07-22 11:11:38,404 INFO L226 Difference]: Without dead ends: 1201 [2022-07-22 11:11:38,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:11:38,406 INFO L413 NwaCegarLoop]: 871 mSDtfsCounter, 930 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 136 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 990 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:38,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [990 Valid, 1285 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 323 Invalid, 3 Unknown, 0 Unchecked, 11.9s Time] [2022-07-22 11:11:38,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2022-07-22 11:11:38,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1142. [2022-07-22 11:11:38,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 918 states have (on average 1.411764705882353) internal successors, (1296), 916 states have internal predecessors, (1296), 162 states have call successors, (162), 55 states have call predecessors, (162), 61 states have return successors, (215), 170 states have call predecessors, (215), 155 states have call successors, (215) [2022-07-22 11:11:38,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 1673 transitions. [2022-07-22 11:11:38,450 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 1673 transitions. Word has length 42 [2022-07-22 11:11:38,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:38,451 INFO L495 AbstractCegarLoop]: Abstraction has 1142 states and 1673 transitions. [2022-07-22 11:11:38,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 11:11:38,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 1673 transitions. [2022-07-22 11:11:38,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 11:11:38,453 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:38,453 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:11:38,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 11:11:38,453 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:38,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:38,454 INFO L85 PathProgramCache]: Analyzing trace with hash 487863225, now seen corresponding path program 1 times [2022-07-22 11:11:38,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:38,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27562735] [2022-07-22 11:11:38,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:38,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:38,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:38,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:38,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27562735] [2022-07-22 11:11:38,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27562735] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:38,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:38,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:11:38,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370058019] [2022-07-22 11:11:38,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:38,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:11:38,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:38,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:11:38,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:11:38,530 INFO L87 Difference]: Start difference. First operand 1142 states and 1673 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:39,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:39,034 INFO L93 Difference]: Finished difference Result 1456 states and 2130 transitions. [2022-07-22 11:11:39,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:11:39,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-22 11:11:39,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:39,042 INFO L225 Difference]: With dead ends: 1456 [2022-07-22 11:11:39,042 INFO L226 Difference]: Without dead ends: 1447 [2022-07-22 11:11:39,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:11:39,043 INFO L413 NwaCegarLoop]: 1181 mSDtfsCounter, 1190 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1197 SdHoareTripleChecker+Valid, 1846 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:39,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1197 Valid, 1846 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 11:11:39,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2022-07-22 11:11:39,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 1182. [2022-07-22 11:11:39,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 955 states have (on average 1.4020942408376964) internal successors, (1339), 946 states have internal predecessors, (1339), 162 states have call successors, (162), 55 states have call predecessors, (162), 64 states have return successors, (225), 180 states have call predecessors, (225), 155 states have call successors, (225) [2022-07-22 11:11:39,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1726 transitions. [2022-07-22 11:11:39,091 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1726 transitions. Word has length 39 [2022-07-22 11:11:39,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:39,092 INFO L495 AbstractCegarLoop]: Abstraction has 1182 states and 1726 transitions. [2022-07-22 11:11:39,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:39,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1726 transitions. [2022-07-22 11:11:39,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 11:11:39,094 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:39,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:11:39,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 11:11:39,094 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:39,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:39,095 INFO L85 PathProgramCache]: Analyzing trace with hash 487586395, now seen corresponding path program 1 times [2022-07-22 11:11:39,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:39,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200937843] [2022-07-22 11:11:39,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:39,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:39,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:39,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:39,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:39,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200937843] [2022-07-22 11:11:39,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200937843] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:39,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:39,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:11:39,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828430004] [2022-07-22 11:11:39,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:39,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:11:39,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:39,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:11:39,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:11:39,167 INFO L87 Difference]: Start difference. First operand 1182 states and 1726 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:39,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:39,217 INFO L93 Difference]: Finished difference Result 1204 states and 1757 transitions. [2022-07-22 11:11:39,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:11:39,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-22 11:11:39,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:39,224 INFO L225 Difference]: With dead ends: 1204 [2022-07-22 11:11:39,224 INFO L226 Difference]: Without dead ends: 1176 [2022-07-22 11:11:39,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:11:39,225 INFO L413 NwaCegarLoop]: 882 mSDtfsCounter, 876 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:39,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [876 Valid, 882 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:11:39,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2022-07-22 11:11:39,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1149. [2022-07-22 11:11:39,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 925 states have (on average 1.4075675675675676) internal successors, (1302), 923 states have internal predecessors, (1302), 161 states have call successors, (161), 55 states have call predecessors, (161), 62 states have return successors, (216), 170 states have call predecessors, (216), 155 states have call successors, (216) [2022-07-22 11:11:39,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1679 transitions. [2022-07-22 11:11:39,288 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1679 transitions. Word has length 39 [2022-07-22 11:11:39,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:39,289 INFO L495 AbstractCegarLoop]: Abstraction has 1149 states and 1679 transitions. [2022-07-22 11:11:39,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:39,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1679 transitions. [2022-07-22 11:11:39,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 11:11:39,291 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:39,291 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:11:39,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 11:11:39,291 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:39,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:39,292 INFO L85 PathProgramCache]: Analyzing trace with hash 473241486, now seen corresponding path program 1 times [2022-07-22 11:11:39,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:39,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558591416] [2022-07-22 11:11:39,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:39,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:39,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:39,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:39,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:39,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558591416] [2022-07-22 11:11:39,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558591416] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:39,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:39,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:11:39,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703390883] [2022-07-22 11:11:39,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:39,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:11:39,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:39,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:11:39,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:11:39,371 INFO L87 Difference]: Start difference. First operand 1149 states and 1679 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:39,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:39,470 INFO L93 Difference]: Finished difference Result 1421 states and 2077 transitions. [2022-07-22 11:11:39,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:11:39,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-22 11:11:39,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:39,477 INFO L225 Difference]: With dead ends: 1421 [2022-07-22 11:11:39,477 INFO L226 Difference]: Without dead ends: 1412 [2022-07-22 11:11:39,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:11:39,478 INFO L413 NwaCegarLoop]: 1202 mSDtfsCounter, 356 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 2035 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:39,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 2035 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:11:39,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2022-07-22 11:11:39,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1147. [2022-07-22 11:11:39,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 923 states have (on average 1.4062838569880824) internal successors, (1298), 921 states have internal predecessors, (1298), 161 states have call successors, (161), 55 states have call predecessors, (161), 62 states have return successors, (216), 170 states have call predecessors, (216), 155 states have call successors, (216) [2022-07-22 11:11:39,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1675 transitions. [2022-07-22 11:11:39,534 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1675 transitions. Word has length 39 [2022-07-22 11:11:39,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:39,535 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1675 transitions. [2022-07-22 11:11:39,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:39,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1675 transitions. [2022-07-22 11:11:39,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 11:11:39,536 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:39,536 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:11:39,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 11:11:39,537 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:39,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:39,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1047230606, now seen corresponding path program 1 times [2022-07-22 11:11:39,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:39,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755390192] [2022-07-22 11:11:39,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:39,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:39,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:39,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:39,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755390192] [2022-07-22 11:11:39,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755390192] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:39,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:39,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:11:39,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335176171] [2022-07-22 11:11:39,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:39,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:11:39,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:39,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:11:39,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:11:39,611 INFO L87 Difference]: Start difference. First operand 1147 states and 1675 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:39,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:39,985 INFO L93 Difference]: Finished difference Result 1177 states and 1707 transitions. [2022-07-22 11:11:39,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:11:39,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-22 11:11:39,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:39,991 INFO L225 Difference]: With dead ends: 1177 [2022-07-22 11:11:39,991 INFO L226 Difference]: Without dead ends: 1130 [2022-07-22 11:11:39,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:11:39,992 INFO L413 NwaCegarLoop]: 871 mSDtfsCounter, 888 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 1523 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:39,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 1523 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 11:11:39,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2022-07-22 11:11:40,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 1118. [2022-07-22 11:11:40,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 897 states have (on average 1.411371237458194) internal successors, (1266), 901 states have internal predecessors, (1266), 161 states have call successors, (161), 55 states have call predecessors, (161), 59 states have return successors, (205), 161 states have call predecessors, (205), 155 states have call successors, (205) [2022-07-22 11:11:40,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1632 transitions. [2022-07-22 11:11:40,070 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1632 transitions. Word has length 39 [2022-07-22 11:11:40,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:40,070 INFO L495 AbstractCegarLoop]: Abstraction has 1118 states and 1632 transitions. [2022-07-22 11:11:40,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:40,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1632 transitions. [2022-07-22 11:11:40,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-22 11:11:40,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:40,072 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:11:40,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 11:11:40,073 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:40,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:40,073 INFO L85 PathProgramCache]: Analyzing trace with hash -2056214186, now seen corresponding path program 1 times [2022-07-22 11:11:40,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:40,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390738343] [2022-07-22 11:11:40,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:40,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:40,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:40,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:40,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:40,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390738343] [2022-07-22 11:11:40,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390738343] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:40,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:40,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 11:11:40,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696091906] [2022-07-22 11:11:40,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:40,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 11:11:40,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:40,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 11:11:40,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:11:40,172 INFO L87 Difference]: Start difference. First operand 1118 states and 1632 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:40,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:40,290 INFO L93 Difference]: Finished difference Result 1130 states and 1644 transitions. [2022-07-22 11:11:40,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:11:40,291 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-22 11:11:40,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:40,295 INFO L225 Difference]: With dead ends: 1130 [2022-07-22 11:11:40,296 INFO L226 Difference]: Without dead ends: 1102 [2022-07-22 11:11:40,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:11:40,298 INFO L413 NwaCegarLoop]: 878 mSDtfsCounter, 34 mSDsluCounter, 3465 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 4343 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:40,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 4343 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:11:40,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2022-07-22 11:11:40,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 1102. [2022-07-22 11:11:40,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 881 states have (on average 1.4154370034052213) internal successors, (1247), 885 states have internal predecessors, (1247), 161 states have call successors, (161), 55 states have call predecessors, (161), 59 states have return successors, (205), 161 states have call predecessors, (205), 155 states have call successors, (205) [2022-07-22 11:11:40,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1613 transitions. [2022-07-22 11:11:40,351 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1613 transitions. Word has length 40 [2022-07-22 11:11:40,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:40,351 INFO L495 AbstractCegarLoop]: Abstraction has 1102 states and 1613 transitions. [2022-07-22 11:11:40,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 11:11:40,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1613 transitions. [2022-07-22 11:11:40,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-22 11:11:40,353 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:40,353 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:11:40,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 11:11:40,354 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:40,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:40,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1550931695, now seen corresponding path program 1 times [2022-07-22 11:11:40,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:40,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111262028] [2022-07-22 11:11:40,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:40,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:40,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 11:11:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:40,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-22 11:11:40,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:40,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:40,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:40,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111262028] [2022-07-22 11:11:40,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111262028] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:40,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:40,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:11:40,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010277175] [2022-07-22 11:11:40,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:40,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:11:40,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:40,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:11:40,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:11:40,465 INFO L87 Difference]: Start difference. First operand 1102 states and 1613 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 11:11:45,374 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:48,345 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:50,262 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:52,354 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:54,397 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:54,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:54,496 INFO L93 Difference]: Finished difference Result 1800 states and 2650 transitions. [2022-07-22 11:11:54,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 11:11:54,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-07-22 11:11:54,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:54,503 INFO L225 Difference]: With dead ends: 1800 [2022-07-22 11:11:54,503 INFO L226 Difference]: Without dead ends: 1233 [2022-07-22 11:11:54,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:11:54,506 INFO L413 NwaCegarLoop]: 936 mSDtfsCounter, 586 mSDsluCounter, 1482 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 258 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 2418 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:54,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [615 Valid, 2418 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 619 Invalid, 3 Unknown, 0 Unchecked, 13.9s Time] [2022-07-22 11:11:54,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2022-07-22 11:11:54,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1061. [2022-07-22 11:11:54,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 848 states have (on average 1.4162735849056605) internal successors, (1201), 855 states have internal predecessors, (1201), 156 states have call successors, (156), 51 states have call predecessors, (156), 56 states have return successors, (212), 154 states have call predecessors, (212), 150 states have call successors, (212) [2022-07-22 11:11:54,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1569 transitions. [2022-07-22 11:11:54,571 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1569 transitions. Word has length 49 [2022-07-22 11:11:54,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:54,571 INFO L495 AbstractCegarLoop]: Abstraction has 1061 states and 1569 transitions. [2022-07-22 11:11:54,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 11:11:54,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1569 transitions. [2022-07-22 11:11:54,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-22 11:11:54,574 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:54,574 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:11:54,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 11:11:54,574 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:54,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:54,575 INFO L85 PathProgramCache]: Analyzing trace with hash -12023192, now seen corresponding path program 1 times [2022-07-22 11:11:54,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:54,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416216843] [2022-07-22 11:11:54,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:54,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:54,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 11:11:54,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:54,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 11:11:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:54,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:54,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416216843] [2022-07-22 11:11:54,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416216843] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:54,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:54,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:11:54,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476088578] [2022-07-22 11:11:54,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:54,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:11:54,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:54,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:11:54,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:11:54,663 INFO L87 Difference]: Start difference. First operand 1061 states and 1569 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 11:11:59,063 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:03,397 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:05,475 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:07,493 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:07,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:12:07,576 INFO L93 Difference]: Finished difference Result 1173 states and 1740 transitions. [2022-07-22 11:12:07,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:12:07,579 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-07-22 11:12:07,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:12:07,584 INFO L225 Difference]: With dead ends: 1173 [2022-07-22 11:12:07,585 INFO L226 Difference]: Without dead ends: 1145 [2022-07-22 11:12:07,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:12:07,586 INFO L413 NwaCegarLoop]: 838 mSDtfsCounter, 290 mSDsluCounter, 1582 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 253 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 2420 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:12:07,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 2420 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 648 Invalid, 4 Unknown, 0 Unchecked, 12.8s Time] [2022-07-22 11:12:07,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2022-07-22 11:12:07,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 1062. [2022-07-22 11:12:07,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 849 states have (on average 1.4157832744405183) internal successors, (1202), 856 states have internal predecessors, (1202), 156 states have call successors, (156), 51 states have call predecessors, (156), 56 states have return successors, (212), 154 states have call predecessors, (212), 150 states have call successors, (212) [2022-07-22 11:12:07,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1570 transitions. [2022-07-22 11:12:07,636 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1570 transitions. Word has length 49 [2022-07-22 11:12:07,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:12:07,637 INFO L495 AbstractCegarLoop]: Abstraction has 1062 states and 1570 transitions. [2022-07-22 11:12:07,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 11:12:07,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1570 transitions. [2022-07-22 11:12:07,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-22 11:12:07,639 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:12:07,639 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:12:07,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 11:12:07,639 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:12:07,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:12:07,640 INFO L85 PathProgramCache]: Analyzing trace with hash 410678634, now seen corresponding path program 1 times [2022-07-22 11:12:07,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:12:07,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285345805] [2022-07-22 11:12:07,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:12:07,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:12:07,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:07,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 11:12:07,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:07,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 11:12:07,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:07,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:12:07,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:12:07,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285345805] [2022-07-22 11:12:07,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285345805] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:12:07,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:12:07,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:12:07,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209379411] [2022-07-22 11:12:07,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:12:07,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:12:07,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:12:07,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:12:07,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:12:07,731 INFO L87 Difference]: Start difference. First operand 1062 states and 1570 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 11:12:11,788 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:14,026 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:17,153 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:20,172 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:20,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:12:20,390 INFO L93 Difference]: Finished difference Result 1144 states and 1703 transitions. [2022-07-22 11:12:20,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 11:12:20,391 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2022-07-22 11:12:20,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:12:20,396 INFO L225 Difference]: With dead ends: 1144 [2022-07-22 11:12:20,397 INFO L226 Difference]: Without dead ends: 1137 [2022-07-22 11:12:20,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-22 11:12:20,398 INFO L413 NwaCegarLoop]: 836 mSDtfsCounter, 272 mSDsluCounter, 1578 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 241 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 2414 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:12:20,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 2414 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 666 Invalid, 4 Unknown, 0 Unchecked, 12.6s Time] [2022-07-22 11:12:20,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2022-07-22 11:12:20,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 1074. [2022-07-22 11:12:20,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 861 states have (on average 1.4123112659698025) internal successors, (1216), 868 states have internal predecessors, (1216), 156 states have call successors, (156), 51 states have call predecessors, (156), 56 states have return successors, (212), 154 states have call predecessors, (212), 150 states have call successors, (212) [2022-07-22 11:12:20,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1584 transitions. [2022-07-22 11:12:20,450 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1584 transitions. Word has length 49 [2022-07-22 11:12:20,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:12:20,450 INFO L495 AbstractCegarLoop]: Abstraction has 1074 states and 1584 transitions. [2022-07-22 11:12:20,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 11:12:20,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1584 transitions. [2022-07-22 11:12:20,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-22 11:12:20,452 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:12:20,453 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:12:20,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 11:12:20,453 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:12:20,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:12:20,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1987447871, now seen corresponding path program 1 times [2022-07-22 11:12:20,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:12:20,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536490390] [2022-07-22 11:12:20,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:12:20,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:12:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:20,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-22 11:12:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:20,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 11:12:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:20,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:12:20,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:12:20,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536490390] [2022-07-22 11:12:20,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536490390] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:12:20,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:12:20,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:12:20,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404796760] [2022-07-22 11:12:20,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:12:20,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:12:20,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:12:20,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:12:20,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:12:20,546 INFO L87 Difference]: Start difference. First operand 1074 states and 1584 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 11:12:24,508 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:26,205 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:28,226 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:30,599 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:32,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:12:32,600 INFO L93 Difference]: Finished difference Result 1212 states and 1785 transitions. [2022-07-22 11:12:32,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 11:12:32,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2022-07-22 11:12:32,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:12:32,609 INFO L225 Difference]: With dead ends: 1212 [2022-07-22 11:12:32,610 INFO L226 Difference]: Without dead ends: 1138 [2022-07-22 11:12:32,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:12:32,611 INFO L413 NwaCegarLoop]: 836 mSDtfsCounter, 935 mSDsluCounter, 1205 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 287 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 998 SdHoareTripleChecker+Valid, 2041 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:12:32,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [998 Valid, 2041 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 573 Invalid, 3 Unknown, 0 Unchecked, 12.0s Time] [2022-07-22 11:12:32,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2022-07-22 11:12:32,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1063. [2022-07-22 11:12:32,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 854 states have (on average 1.4133489461358313) internal successors, (1207), 861 states have internal predecessors, (1207), 154 states have call successors, (154), 49 states have call predecessors, (154), 54 states have return successors, (210), 152 states have call predecessors, (210), 148 states have call successors, (210) [2022-07-22 11:12:32,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1571 transitions. [2022-07-22 11:12:32,667 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1571 transitions. Word has length 50 [2022-07-22 11:12:32,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:12:32,667 INFO L495 AbstractCegarLoop]: Abstraction has 1063 states and 1571 transitions. [2022-07-22 11:12:32,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 11:12:32,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1571 transitions. [2022-07-22 11:12:32,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-22 11:12:32,669 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:12:32,669 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:12:32,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 11:12:32,670 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:12:32,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:12:32,670 INFO L85 PathProgramCache]: Analyzing trace with hash -145093477, now seen corresponding path program 1 times [2022-07-22 11:12:32,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:12:32,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412601635] [2022-07-22 11:12:32,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:12:32,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:12:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:32,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 11:12:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:32,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 11:12:32,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:32,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:12:32,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:12:32,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412601635] [2022-07-22 11:12:32,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412601635] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:12:32,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:12:32,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 11:12:32,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611961765] [2022-07-22 11:12:32,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:12:32,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 11:12:32,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:12:32,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 11:12:32,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:12:32,802 INFO L87 Difference]: Start difference. First operand 1063 states and 1571 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 11:12:37,395 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:39,636 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:41,396 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:44,005 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:45,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:12:45,728 INFO L93 Difference]: Finished difference Result 1133 states and 1686 transitions. [2022-07-22 11:12:45,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 11:12:45,730 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2022-07-22 11:12:45,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:12:45,735 INFO L225 Difference]: With dead ends: 1133 [2022-07-22 11:12:45,738 INFO L226 Difference]: Without dead ends: 1128 [2022-07-22 11:12:45,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-07-22 11:12:45,740 INFO L413 NwaCegarLoop]: 830 mSDtfsCounter, 1117 mSDsluCounter, 2056 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 297 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 2886 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:12:45,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1207 Valid, 2886 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1062 Invalid, 2 Unknown, 0 Unchecked, 12.8s Time] [2022-07-22 11:12:45,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2022-07-22 11:12:45,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1063. [2022-07-22 11:12:45,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 854 states have (on average 1.4121779859484778) internal successors, (1206), 861 states have internal predecessors, (1206), 154 states have call successors, (154), 49 states have call predecessors, (154), 54 states have return successors, (210), 152 states have call predecessors, (210), 148 states have call successors, (210) [2022-07-22 11:12:45,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1570 transitions. [2022-07-22 11:12:45,791 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1570 transitions. Word has length 50 [2022-07-22 11:12:45,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:12:45,792 INFO L495 AbstractCegarLoop]: Abstraction has 1063 states and 1570 transitions. [2022-07-22 11:12:45,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 11:12:45,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1570 transitions. [2022-07-22 11:12:45,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-22 11:12:45,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:12:45,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:12:45,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 11:12:45,794 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:12:45,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:12:45,795 INFO L85 PathProgramCache]: Analyzing trace with hash -478429300, now seen corresponding path program 1 times [2022-07-22 11:12:45,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:12:45,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767054220] [2022-07-22 11:12:45,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:12:45,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:12:45,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:45,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 11:12:45,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:45,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 11:12:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:45,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:12:45,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:12:45,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767054220] [2022-07-22 11:12:45,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767054220] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:12:45,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:12:45,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:12:45,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532168781] [2022-07-22 11:12:45,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:12:45,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:12:45,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:12:45,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:12:45,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:12:45,889 INFO L87 Difference]: Start difference. First operand 1063 states and 1570 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 11:12:50,150 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:52,009 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:54,033 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:56,666 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:58,764 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:59,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:12:59,592 INFO L93 Difference]: Finished difference Result 2189 states and 3253 transitions. [2022-07-22 11:12:59,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:12:59,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2022-07-22 11:12:59,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:12:59,598 INFO L225 Difference]: With dead ends: 2189 [2022-07-22 11:12:59,598 INFO L226 Difference]: Without dead ends: 1130 [2022-07-22 11:12:59,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:12:59,602 INFO L413 NwaCegarLoop]: 833 mSDtfsCounter, 245 mSDsluCounter, 1626 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 238 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 2459 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:12:59,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 2459 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 639 Invalid, 4 Unknown, 0 Unchecked, 13.6s Time] [2022-07-22 11:12:59,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2022-07-22 11:12:59,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 1066. [2022-07-22 11:12:59,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 857 states have (on average 1.41073512252042) internal successors, (1209), 864 states have internal predecessors, (1209), 154 states have call successors, (154), 49 states have call predecessors, (154), 54 states have return successors, (210), 152 states have call predecessors, (210), 148 states have call successors, (210) [2022-07-22 11:12:59,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1573 transitions. [2022-07-22 11:12:59,656 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1573 transitions. Word has length 51 [2022-07-22 11:12:59,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:12:59,656 INFO L495 AbstractCegarLoop]: Abstraction has 1066 states and 1573 transitions. [2022-07-22 11:12:59,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 11:12:59,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1573 transitions. [2022-07-22 11:12:59,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-22 11:12:59,662 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:12:59,662 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:12:59,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-22 11:12:59,663 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:12:59,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:12:59,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1720167098, now seen corresponding path program 1 times [2022-07-22 11:12:59,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:12:59,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287904394] [2022-07-22 11:12:59,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:12:59,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:12:59,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:59,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 11:12:59,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:59,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 11:12:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 11:12:59,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:12:59,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287904394] [2022-07-22 11:12:59,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287904394] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:12:59,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83947005] [2022-07-22 11:12:59,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:12:59,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:12:59,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:12:59,785 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:12:59,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 11:13:00,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:13:00,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 11:13:00,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:13:00,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:13:00,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:13:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 11:13:00,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83947005] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:13:00,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:13:00,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-07-22 11:13:00,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972900743] [2022-07-22 11:13:00,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:13:00,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 11:13:00,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:13:00,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 11:13:00,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:13:00,316 INFO L87 Difference]: Start difference. First operand 1066 states and 1573 transitions. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 7 states have internal predecessors, (80), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 11:13:05,786 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:13:07,940 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:13:11,223 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:13:13,331 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:13:14,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:13:14,287 INFO L93 Difference]: Finished difference Result 2204 states and 3272 transitions. [2022-07-22 11:13:14,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 11:13:14,289 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 7 states have internal predecessors, (80), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2022-07-22 11:13:14,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:13:14,293 INFO L225 Difference]: With dead ends: 2204 [2022-07-22 11:13:14,293 INFO L226 Difference]: Without dead ends: 1143 [2022-07-22 11:13:14,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-07-22 11:13:14,297 INFO L413 NwaCegarLoop]: 831 mSDtfsCounter, 271 mSDsluCounter, 3042 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 262 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 3873 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2022-07-22 11:13:14,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 3873 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 993 Invalid, 4 Unknown, 0 Unchecked, 13.9s Time] [2022-07-22 11:13:14,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2022-07-22 11:13:14,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 1076. [2022-07-22 11:13:14,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 867 states have (on average 1.405997693194925) internal successors, (1219), 874 states have internal predecessors, (1219), 154 states have call successors, (154), 49 states have call predecessors, (154), 54 states have return successors, (210), 152 states have call predecessors, (210), 148 states have call successors, (210) [2022-07-22 11:13:14,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1583 transitions. [2022-07-22 11:13:14,374 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1583 transitions. Word has length 57 [2022-07-22 11:13:14,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:13:14,374 INFO L495 AbstractCegarLoop]: Abstraction has 1076 states and 1583 transitions. [2022-07-22 11:13:14,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 7 states have internal predecessors, (80), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 11:13:14,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1583 transitions. [2022-07-22 11:13:14,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-22 11:13:14,376 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:13:14,376 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:13:14,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 11:13:14,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-22 11:13:14,602 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:13:14,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:13:14,602 INFO L85 PathProgramCache]: Analyzing trace with hash 788337404, now seen corresponding path program 2 times [2022-07-22 11:13:14,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:13:14,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359862990] [2022-07-22 11:13:14,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:13:14,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:13:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:13:14,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-22 11:13:14,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:13:14,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 11:13:14,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:13:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 11:13:14,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:13:14,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359862990] [2022-07-22 11:13:14,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359862990] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:13:14,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480669896] [2022-07-22 11:13:14,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 11:13:14,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:13:14,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:13:14,761 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:13:14,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 11:13:15,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-22 11:13:15,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:13:15,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 11:13:15,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:13:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 11:13:15,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:13:15,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480669896] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:13:15,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:13:15,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-07-22 11:13:15,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159489288] [2022-07-22 11:13:15,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:13:15,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:13:15,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:13:15,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:13:15,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:13:15,201 INFO L87 Difference]: Start difference. First operand 1076 states and 1583 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 11:13:15,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:13:15,295 INFO L93 Difference]: Finished difference Result 1874 states and 2813 transitions. [2022-07-22 11:13:15,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:13:15,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67 [2022-07-22 11:13:15,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:13:15,300 INFO L225 Difference]: With dead ends: 1874 [2022-07-22 11:13:15,300 INFO L226 Difference]: Without dead ends: 1085 [2022-07-22 11:13:15,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-22 11:13:15,303 INFO L413 NwaCegarLoop]: 859 mSDtfsCounter, 2 mSDsluCounter, 1703 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2562 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:13:15,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2562 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:13:15,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2022-07-22 11:13:15,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 1085. [2022-07-22 11:13:15,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1085 states, 874 states have (on average 1.4050343249427917) internal successors, (1228), 883 states have internal predecessors, (1228), 154 states have call successors, (154), 49 states have call predecessors, (154), 56 states have return successors, (212), 152 states have call predecessors, (212), 148 states have call successors, (212) [2022-07-22 11:13:15,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1085 states to 1085 states and 1594 transitions. [2022-07-22 11:13:15,361 INFO L78 Accepts]: Start accepts. Automaton has 1085 states and 1594 transitions. Word has length 67 [2022-07-22 11:13:15,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:13:15,361 INFO L495 AbstractCegarLoop]: Abstraction has 1085 states and 1594 transitions. [2022-07-22 11:13:15,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 11:13:15,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1085 states and 1594 transitions. [2022-07-22 11:13:15,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-22 11:13:15,367 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:13:15,367 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:13:15,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 11:13:15,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-22 11:13:15,593 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:13:15,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:13:15,593 INFO L85 PathProgramCache]: Analyzing trace with hash -123842170, now seen corresponding path program 1 times [2022-07-22 11:13:15,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:13:15,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288457934] [2022-07-22 11:13:15,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:13:15,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:13:15,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:13:15,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 11:13:15,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:13:15,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 11:13:15,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:13:15,761 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 11:13:15,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:13:15,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288457934] [2022-07-22 11:13:15,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288457934] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:13:15,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:13:15,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-22 11:13:15,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86522149] [2022-07-22 11:13:15,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:13:15,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 11:13:15,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:13:15,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 11:13:15,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-22 11:13:15,765 INFO L87 Difference]: Start difference. First operand 1085 states and 1594 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 11:13:21,914 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:13:24,071 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:13:25,498 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:13:27,821 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:13:30,878 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:13:30,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:13:30,971 INFO L93 Difference]: Finished difference Result 1122 states and 1644 transitions. [2022-07-22 11:13:30,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 11:13:30,973 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 67 [2022-07-22 11:13:30,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:13:30,977 INFO L225 Difference]: With dead ends: 1122 [2022-07-22 11:13:30,977 INFO L226 Difference]: Without dead ends: 1107 [2022-07-22 11:13:30,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-07-22 11:13:30,978 INFO L413 NwaCegarLoop]: 843 mSDtfsCounter, 90 mSDsluCounter, 5401 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 105 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 6244 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:13:30,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 6244 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1471 Invalid, 4 Unknown, 0 Unchecked, 15.1s Time] [2022-07-22 11:13:30,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2022-07-22 11:13:31,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 1083. [2022-07-22 11:13:31,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 873 states have (on average 1.404352806414662) internal successors, (1226), 882 states have internal predecessors, (1226), 153 states have call successors, (153), 49 states have call predecessors, (153), 56 states have return successors, (211), 151 states have call predecessors, (211), 147 states have call successors, (211) [2022-07-22 11:13:31,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 1590 transitions. [2022-07-22 11:13:31,033 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 1590 transitions. Word has length 67 [2022-07-22 11:13:31,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:13:31,033 INFO L495 AbstractCegarLoop]: Abstraction has 1083 states and 1590 transitions. [2022-07-22 11:13:31,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 11:13:31,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 1590 transitions. [2022-07-22 11:13:31,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-22 11:13:31,036 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:13:31,036 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:13:31,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-22 11:13:31,037 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:13:31,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:13:31,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1285874888, now seen corresponding path program 1 times [2022-07-22 11:13:31,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:13:31,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384510909] [2022-07-22 11:13:31,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:13:31,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:13:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:13:31,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-22 11:13:31,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:13:31,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 11:13:31,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:13:31,161 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 11:13:31,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:13:31,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384510909] [2022-07-22 11:13:31,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384510909] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:13:31,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345328056] [2022-07-22 11:13:31,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:13:31,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:13:31,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:13:31,164 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:13:31,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 11:13:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:13:31,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 11:13:31,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:13:31,683 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 11:13:31,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:13:31,747 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 11:13:31,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345328056] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:13:31,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:13:31,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2022-07-22 11:13:31,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657538859] [2022-07-22 11:13:31,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:13:31,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 11:13:31,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:13:31,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 11:13:31,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-07-22 11:13:31,750 INFO L87 Difference]: Start difference. First operand 1083 states and 1590 transitions. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 9 states have internal predecessors, (72), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 11:13:37,278 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:13:38,546 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:13:40,562 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:13:42,725 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:13:44,796 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:13:46,920 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:13:48,945 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:13:49,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:13:49,042 INFO L93 Difference]: Finished difference Result 2223 states and 3269 transitions. [2022-07-22 11:13:49,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 11:13:49,043 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 9 states have internal predecessors, (72), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 68 [2022-07-22 11:13:49,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:13:49,047 INFO L225 Difference]: With dead ends: 2223 [2022-07-22 11:13:49,047 INFO L226 Difference]: Without dead ends: 1147 [2022-07-22 11:13:49,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-07-22 11:13:49,050 INFO L413 NwaCegarLoop]: 828 mSDtfsCounter, 277 mSDsluCounter, 3732 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 266 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 4560 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:13:49,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 4560 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1187 Invalid, 6 Unknown, 0 Unchecked, 17.2s Time] [2022-07-22 11:13:49,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-07-22 11:13:49,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1097. [2022-07-22 11:13:49,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 887 states have (on average 1.3979706877113867) internal successors, (1240), 896 states have internal predecessors, (1240), 153 states have call successors, (153), 49 states have call predecessors, (153), 56 states have return successors, (211), 151 states have call predecessors, (211), 147 states have call successors, (211) [2022-07-22 11:13:49,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1604 transitions. [2022-07-22 11:13:49,109 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1604 transitions. Word has length 68 [2022-07-22 11:13:49,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:13:49,110 INFO L495 AbstractCegarLoop]: Abstraction has 1097 states and 1604 transitions. [2022-07-22 11:13:49,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 9 states have internal predecessors, (72), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 11:13:49,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1604 transitions. [2022-07-22 11:13:49,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-22 11:13:49,112 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:13:49,112 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:13:49,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 11:13:49,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:13:49,324 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:13:49,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:13:49,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1011931974, now seen corresponding path program 2 times [2022-07-22 11:13:49,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:13:49,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525277347] [2022-07-22 11:13:49,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:13:49,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:13:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:13:49,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-22 11:13:49,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:13:49,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-22 11:13:49,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:13:49,544 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-22 11:13:49,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:13:49,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525277347] [2022-07-22 11:13:49,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525277347] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:13:49,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541846109] [2022-07-22 11:13:49,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 11:13:49,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:13:49,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:13:49,548 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:13:49,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 11:13:50,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 11:13:50,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:13:50,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 11:13:50,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:13:50,249 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-22 11:13:50,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:13:50,347 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-22 11:13:50,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541846109] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:13:50,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:13:50,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2022-07-22 11:13:50,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047679817] [2022-07-22 11:13:50,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:13:50,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 11:13:50,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:13:50,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 11:13:50,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2022-07-22 11:13:50,349 INFO L87 Difference]: Start difference. First operand 1097 states and 1604 transitions. Second operand has 15 states, 15 states have (on average 6.2) internal successors, (93), 13 states have internal predecessors, (93), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 11:13:57,240 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:13:59,381 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:14:01,415 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:14:03,868 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:14:05,972 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:14:07,995 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:14:08,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:14:08,089 INFO L93 Difference]: Finished difference Result 2263 states and 3319 transitions. [2022-07-22 11:14:08,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 11:14:08,091 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 13 states have internal predecessors, (93), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 82 [2022-07-22 11:14:08,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:14:08,093 INFO L225 Difference]: With dead ends: 2263 [2022-07-22 11:14:08,093 INFO L226 Difference]: Without dead ends: 1181 [2022-07-22 11:14:08,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-07-22 11:14:08,097 INFO L413 NwaCegarLoop]: 829 mSDtfsCounter, 330 mSDsluCounter, 3734 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 333 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 4563 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:14:08,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 4563 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 1413 Invalid, 6 Unknown, 0 Unchecked, 17.5s Time] [2022-07-22 11:14:08,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2022-07-22 11:14:08,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1133. [2022-07-22 11:14:08,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 923 states have (on average 1.3824485373781148) internal successors, (1276), 932 states have internal predecessors, (1276), 153 states have call successors, (153), 49 states have call predecessors, (153), 56 states have return successors, (211), 151 states have call predecessors, (211), 147 states have call successors, (211) [2022-07-22 11:14:08,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 1640 transitions. [2022-07-22 11:14:08,154 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 1640 transitions. Word has length 82 [2022-07-22 11:14:08,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:14:08,155 INFO L495 AbstractCegarLoop]: Abstraction has 1133 states and 1640 transitions. [2022-07-22 11:14:08,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 13 states have internal predecessors, (93), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 11:14:08,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 1640 transitions. [2022-07-22 11:14:08,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-22 11:14:08,157 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:14:08,158 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:14:08,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 11:14:08,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-22 11:14:08,379 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:14:08,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:14:08,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1191219690, now seen corresponding path program 3 times [2022-07-22 11:14:08,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:14:08,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621323632] [2022-07-22 11:14:08,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:14:08,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:14:08,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:14:08,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-22 11:14:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:14:08,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-07-22 11:14:08,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:14:08,713 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2022-07-22 11:14:08,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:14:08,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621323632] [2022-07-22 11:14:08,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621323632] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:14:08,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596845965] [2022-07-22 11:14:08,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 11:14:08,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:14:08,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:14:08,716 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:14:08,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 11:14:09,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 11:14:09,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:14:09,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 11:14:09,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:14:09,509 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2022-07-22 11:14:09,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:14:09,613 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2022-07-22 11:14:09,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596845965] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:14:09,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:14:09,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5, 5] total 22 [2022-07-22 11:14:09,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312297850] [2022-07-22 11:14:09,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:14:09,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 11:14:09,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:14:09,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 11:14:09,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-07-22 11:14:09,615 INFO L87 Difference]: Start difference. First operand 1133 states and 1640 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 20 states have internal predecessors, (108), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 11:14:16,482 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:14:18,610 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:14:20,644 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:14:24,098 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:14:24,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:14:24,186 INFO L93 Difference]: Finished difference Result 2327 states and 3405 transitions. [2022-07-22 11:14:24,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-22 11:14:24,187 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 20 states have internal predecessors, (108), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 118 [2022-07-22 11:14:24,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:14:24,192 INFO L225 Difference]: With dead ends: 2327 [2022-07-22 11:14:24,192 INFO L226 Difference]: Without dead ends: 1213 [2022-07-22 11:14:24,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 11:14:24,197 INFO L413 NwaCegarLoop]: 819 mSDtfsCounter, 319 mSDsluCounter, 5150 mSDsCounter, 0 mSdLazyCounter, 2518 mSolverCounterSat, 339 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 5969 SdHoareTripleChecker+Invalid, 2861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 2518 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:14:24,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 5969 Invalid, 2861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 2518 Invalid, 4 Unknown, 0 Unchecked, 14.3s Time] [2022-07-22 11:14:24,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-07-22 11:14:24,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1160. [2022-07-22 11:14:24,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 948 states have (on average 1.3850210970464134) internal successors, (1313), 957 states have internal predecessors, (1313), 153 states have call successors, (153), 51 states have call predecessors, (153), 58 states have return successors, (213), 151 states have call predecessors, (213), 147 states have call successors, (213) [2022-07-22 11:14:24,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1679 transitions. [2022-07-22 11:14:24,266 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1679 transitions. Word has length 118 [2022-07-22 11:14:24,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:14:24,266 INFO L495 AbstractCegarLoop]: Abstraction has 1160 states and 1679 transitions. [2022-07-22 11:14:24,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 20 states have internal predecessors, (108), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 11:14:24,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1679 transitions. [2022-07-22 11:14:24,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-22 11:14:24,270 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:14:24,270 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:14:24,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 11:14:24,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-22 11:14:24,471 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:14:24,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:14:24,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1808122274, now seen corresponding path program 1 times [2022-07-22 11:14:24,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:14:24,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545000244] [2022-07-22 11:14:24,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:14:24,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:14:24,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:14:24,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-07-22 11:14:24,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:14:24,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 11:14:24,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:14:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2022-07-22 11:14:24,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:14:24,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545000244] [2022-07-22 11:14:24,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545000244] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:14:24,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:14:24,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-22 11:14:24,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958353253] [2022-07-22 11:14:24,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:14:24,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 11:14:24,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:14:24,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 11:14:24,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-22 11:14:24,752 INFO L87 Difference]: Start difference. First operand 1160 states and 1679 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 7 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 11:14:30,220 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:14:32,358 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:14:34,153 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:14:36,172 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:14:38,677 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:14:40,024 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:14:41,159 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:14:41,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:14:41,230 INFO L93 Difference]: Finished difference Result 1200 states and 1732 transitions. [2022-07-22 11:14:41,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 11:14:41,231 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 7 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 125 [2022-07-22 11:14:41,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:14:41,234 INFO L225 Difference]: With dead ends: 1200 [2022-07-22 11:14:41,234 INFO L226 Difference]: Without dead ends: 1185 [2022-07-22 11:14:41,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-07-22 11:14:41,235 INFO L413 NwaCegarLoop]: 834 mSDtfsCounter, 90 mSDsluCounter, 5354 mSDsCounter, 0 mSdLazyCounter, 1460 mSolverCounterSat, 104 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 6188 SdHoareTripleChecker+Invalid, 1567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1460 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:14:41,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 6188 Invalid, 1567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1460 Invalid, 3 Unknown, 0 Unchecked, 16.4s Time] [2022-07-22 11:14:41,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2022-07-22 11:14:41,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1157. [2022-07-22 11:14:41,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 946 states have (on average 1.3847780126849893) internal successors, (1310), 955 states have internal predecessors, (1310), 152 states have call successors, (152), 51 states have call predecessors, (152), 58 states have return successors, (212), 150 states have call predecessors, (212), 146 states have call successors, (212) [2022-07-22 11:14:41,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 1674 transitions. [2022-07-22 11:14:41,300 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 1674 transitions. Word has length 125 [2022-07-22 11:14:41,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:14:41,300 INFO L495 AbstractCegarLoop]: Abstraction has 1157 states and 1674 transitions. [2022-07-22 11:14:41,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 7 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 11:14:41,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 1674 transitions. [2022-07-22 11:14:41,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-07-22 11:14:41,303 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:14:41,303 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:14:41,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-22 11:14:41,304 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:14:41,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:14:41,304 INFO L85 PathProgramCache]: Analyzing trace with hash 266529286, now seen corresponding path program 1 times [2022-07-22 11:14:41,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:14:41,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026331179] [2022-07-22 11:14:41,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:14:41,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:14:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:14:41,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-07-22 11:14:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:14:41,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 11:14:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:14:41,519 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2022-07-22 11:14:41,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:14:41,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026331179] [2022-07-22 11:14:41,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026331179] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:14:41,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:14:41,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-22 11:14:41,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877907827] [2022-07-22 11:14:41,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:14:41,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 11:14:41,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:14:41,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 11:14:41,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-22 11:14:41,522 INFO L87 Difference]: Start difference. First operand 1157 states and 1674 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 11:14:49,519 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:14:52,180 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:14:53,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:14:53,381 INFO L93 Difference]: Finished difference Result 1199 states and 1729 transitions. [2022-07-22 11:14:53,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 11:14:53,383 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 126 [2022-07-22 11:14:53,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:14:53,386 INFO L225 Difference]: With dead ends: 1199 [2022-07-22 11:14:53,386 INFO L226 Difference]: Without dead ends: 1182 [2022-07-22 11:14:53,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-07-22 11:14:53,387 INFO L413 NwaCegarLoop]: 836 mSDtfsCounter, 101 mSDsluCounter, 6073 mSDsCounter, 0 mSdLazyCounter, 1617 mSolverCounterSat, 103 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 6909 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1617 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:14:53,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 6909 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1617 Invalid, 2 Unknown, 0 Unchecked, 11.8s Time] [2022-07-22 11:14:53,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2022-07-22 11:14:53,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1154. [2022-07-22 11:14:53,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 944 states have (on average 1.3845338983050848) internal successors, (1307), 953 states have internal predecessors, (1307), 151 states have call successors, (151), 51 states have call predecessors, (151), 58 states have return successors, (211), 149 states have call predecessors, (211), 145 states have call successors, (211) [2022-07-22 11:14:53,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1669 transitions. [2022-07-22 11:14:53,452 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1669 transitions. Word has length 126 [2022-07-22 11:14:53,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:14:53,452 INFO L495 AbstractCegarLoop]: Abstraction has 1154 states and 1669 transitions. [2022-07-22 11:14:53,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 11:14:53,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1669 transitions. [2022-07-22 11:14:53,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-22 11:14:53,455 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:14:53,455 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:14:53,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-22 11:14:53,455 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:14:53,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:14:53,456 INFO L85 PathProgramCache]: Analyzing trace with hash -434812860, now seen corresponding path program 4 times [2022-07-22 11:14:53,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:14:53,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751119042] [2022-07-22 11:14:53,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:14:53,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:14:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:14:53,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-22 11:14:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:14:53,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-07-22 11:14:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:14:53,838 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2022-07-22 11:14:53,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:14:53,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751119042] [2022-07-22 11:14:53,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751119042] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:14:53,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665888144] [2022-07-22 11:14:53,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 11:14:53,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:14:53,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:14:53,844 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:14:53,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 11:14:54,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 11:14:54,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:14:54,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-22 11:14:54,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:14:54,558 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2022-07-22 11:14:54,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:14:54,780 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2022-07-22 11:14:54,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665888144] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:14:54,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:14:54,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 8] total 24 [2022-07-22 11:14:54,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400539869] [2022-07-22 11:14:54,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:14:54,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 11:14:54,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:14:54,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 11:14:54,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-07-22 11:14:54,801 INFO L87 Difference]: Start difference. First operand 1154 states and 1669 transitions. Second operand has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 22 states have internal predecessors, (115), 2 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 11:15:03,925 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:15:06,699 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:15:09,179 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []