./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.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 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 23:47:21,565 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 23:47:21,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 23:47:21,604 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 23:47:21,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 23:47:21,606 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 23:47:21,607 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 23:47:21,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 23:47:21,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 23:47:21,630 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 23:47:21,630 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 23:47:21,632 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 23:47:21,633 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 23:47:21,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 23:47:21,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 23:47:21,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 23:47:21,640 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 23:47:21,641 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 23:47:21,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 23:47:21,647 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 23:47:21,649 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 23:47:21,649 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 23:47:21,650 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 23:47:21,650 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 23:47:21,652 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 23:47:21,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 23:47:21,654 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 23:47:21,654 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 23:47:21,655 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 23:47:21,655 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 23:47:21,656 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 23:47:21,656 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 23:47:21,657 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 23:47:21,658 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 23:47:21,658 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 23:47:21,659 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 23:47:21,659 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 23:47:21,659 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 23:47:21,660 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 23:47:21,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 23:47:21,660 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 23:47:21,661 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 23:47:21,663 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 23:47:21,686 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 23:47:21,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 23:47:21,687 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 23:47:21,687 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 23:47:21,688 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 23:47:21,688 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 23:47:21,688 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 23:47:21,688 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 23:47:21,689 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 23:47:21,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 23:47:21,690 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 23:47:21,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 23:47:21,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 23:47:21,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 23:47:21,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 23:47:21,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 23:47:21,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 23:47:21,690 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 23:47:21,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 23:47:21,691 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 23:47:21,691 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 23:47:21,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 23:47:21,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 23:47:21,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 23:47:21,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:47:21,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 23:47:21,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 23:47:21,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 23:47:21,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 23:47:21,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 23:47:21,692 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 23:47:21,693 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 23:47:21,693 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 23:47:21,693 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 [2022-07-11 23:47:21,895 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 23:47:21,919 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 23:47:21,921 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 23:47:21,921 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 23:47:21,922 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 23:47:21,923 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2022-07-11 23:47:21,977 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1b1c306b/881d4f9126dc4ebc8bba08954b90964d/FLAG1e53ee59c [2022-07-11 23:47:22,549 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 23:47:22,550 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2022-07-11 23:47:22,585 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1b1c306b/881d4f9126dc4ebc8bba08954b90964d/FLAG1e53ee59c [2022-07-11 23:47:23,002 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1b1c306b/881d4f9126dc4ebc8bba08954b90964d [2022-07-11 23:47:23,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 23:47:23,005 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 23:47:23,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 23:47:23,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 23:47:23,008 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 23:47:23,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:47:23" (1/1) ... [2022-07-11 23:47:23,009 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bc681df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:23, skipping insertion in model container [2022-07-11 23:47:23,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:47:23" (1/1) ... [2022-07-11 23:47:23,014 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 23:47:23,100 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 23:47:23,489 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/floppy.i.cil-3.c[77246,77259] [2022-07-11 23:47:23,853 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:47:23,886 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 23:47:23,935 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/floppy.i.cil-3.c[77246,77259] [2022-07-11 23:47:24,100 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:47:24,134 INFO L208 MainTranslator]: Completed translation [2022-07-11 23:47:24,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:24 WrapperNode [2022-07-11 23:47:24,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 23:47:24,135 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 23:47:24,135 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 23:47:24,136 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 23:47:24,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:24" (1/1) ... [2022-07-11 23:47:24,210 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:24" (1/1) ... [2022-07-11 23:47:24,344 INFO L137 Inliner]: procedures = 128, calls = 2887, calls flagged for inlining = 37, calls inlined = 26, statements flattened = 3086 [2022-07-11 23:47:24,344 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 23:47:24,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 23:47:24,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 23:47:24,346 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 23:47:24,352 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:24" (1/1) ... [2022-07-11 23:47:24,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:24" (1/1) ... [2022-07-11 23:47:24,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:24" (1/1) ... [2022-07-11 23:47:24,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:24" (1/1) ... [2022-07-11 23:47:24,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:24" (1/1) ... [2022-07-11 23:47:24,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:24" (1/1) ... [2022-07-11 23:47:24,470 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:24" (1/1) ... [2022-07-11 23:47:24,482 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 23:47:24,483 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 23:47:24,483 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 23:47:24,483 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 23:47:24,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:24" (1/1) ... [2022-07-11 23:47:24,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:47:24,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:47:24,512 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-11 23:47:24,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-11 23:47:24,540 INFO L130 BoogieDeclarations]: Found specification of procedure IoGetConfigurationInformation [2022-07-11 23:47:24,540 INFO L138 BoogieDeclarations]: Found implementation of procedure IoGetConfigurationInformation [2022-07-11 23:47:24,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-07-11 23:47:24,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-07-11 23:47:24,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-11 23:47:24,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 23:47:24,541 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-07-11 23:47:24,541 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-07-11 23:47:24,541 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-07-11 23:47:24,541 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-07-11 23:47:24,541 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2022-07-11 23:47:24,541 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2022-07-11 23:47:24,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 23:47:24,541 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2022-07-11 23:47:24,542 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2022-07-11 23:47:24,542 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-07-11 23:47:24,542 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-07-11 23:47:24,542 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedExchange [2022-07-11 23:47:24,542 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedExchange [2022-07-11 23:47:24,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-11 23:47:24,542 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-11 23:47:24,542 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-07-11 23:47:24,542 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-07-11 23:47:24,543 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-07-11 23:47:24,543 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-07-11 23:47:24,543 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2022-07-11 23:47:24,543 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2022-07-11 23:47:24,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-11 23:47:24,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 23:47:24,543 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2022-07-11 23:47:24,543 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2022-07-11 23:47:24,544 INFO L130 BoogieDeclarations]: Found specification of procedure ExfInterlockedInsertTailList [2022-07-11 23:47:24,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ExfInterlockedInsertTailList [2022-07-11 23:47:24,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-11 23:47:24,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-11 23:47:24,544 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-07-11 23:47:24,544 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-07-11 23:47:24,544 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-11 23:47:24,544 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2022-07-11 23:47:24,544 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2022-07-11 23:47:24,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-11 23:47:24,545 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-07-11 23:47:24,545 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-07-11 23:47:24,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2022-07-11 23:47:24,545 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2022-07-11 23:47:24,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 23:47:24,545 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_guard [2022-07-11 23:47:24,545 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_guard [2022-07-11 23:47:24,545 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2022-07-11 23:47:24,546 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2022-07-11 23:47:24,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-07-11 23:47:24,546 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2022-07-11 23:47:24,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2022-07-11 23:47:24,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 23:47:24,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 23:47:24,909 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 23:47:24,910 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 23:47:24,953 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:47:24,962 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-07-11 23:47:24,962 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-07-11 23:47:24,964 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:47:25,042 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2022-07-11 23:47:25,042 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2022-07-11 23:47:25,105 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:47:25,118 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-07-11 23:47:25,118 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-07-11 23:47:25,199 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:47:25,223 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-07-11 23:47:25,223 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-07-11 23:47:25,224 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:47:25,225 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:47:25,226 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:47:25,318 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume !false; [2022-07-11 23:47:25,318 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2022-07-11 23:47:25,318 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2022-07-11 23:47:25,318 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume false; [2022-07-11 23:47:25,318 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2022-07-11 23:47:25,319 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2022-07-11 23:47:25,320 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:47:25,325 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:47:25,327 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:47:25,775 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2022-07-11 23:47:25,775 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2022-07-11 23:47:25,776 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##139: assume false; [2022-07-11 23:47:25,776 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##140: assume !false; [2022-07-11 23:47:25,776 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##124: assume !false; [2022-07-11 23:47:25,776 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##123: assume false; [2022-07-11 23:47:25,795 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:47:25,864 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-07-11 23:47:25,864 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-07-11 23:47:25,871 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:47:25,872 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:47:25,874 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:47:25,875 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:47:25,876 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:47:25,878 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:47:25,878 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:47:25,879 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:47:28,871 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##97: assume !false; [2022-07-11 23:47:28,871 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##96: assume false; [2022-07-11 23:47:28,871 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##76: assume false; [2022-07-11 23:47:28,871 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##177: assume !false; [2022-07-11 23:47:28,871 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##176: assume false; [2022-07-11 23:47:28,872 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##77: assume !false; [2022-07-11 23:47:28,872 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##48: assume !false; [2022-07-11 23:47:28,872 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume false; [2022-07-11 23:47:28,872 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##27: assume !false; [2022-07-11 23:47:28,872 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume false; [2022-07-11 23:47:28,872 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##162: assume false; [2022-07-11 23:47:28,872 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##163: assume !false; [2022-07-11 23:47:28,872 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##210: assume false; [2022-07-11 23:47:28,872 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##211: assume !false; [2022-07-11 23:47:28,872 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##108: assume !false; [2022-07-11 23:47:28,872 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##107: assume false; [2022-07-11 23:47:28,886 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 23:47:28,898 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 23:47:28,899 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-11 23:47:28,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:47:28 BoogieIcfgContainer [2022-07-11 23:47:28,901 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 23:47:28,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 23:47:28,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 23:47:28,906 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 23:47:28,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 11:47:23" (1/3) ... [2022-07-11 23:47:28,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2da9883c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:47:28, skipping insertion in model container [2022-07-11 23:47:28,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:24" (2/3) ... [2022-07-11 23:47:28,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2da9883c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:47:28, skipping insertion in model container [2022-07-11 23:47:28,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:47:28" (3/3) ... [2022-07-11 23:47:28,912 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy.i.cil-3.c [2022-07-11 23:47:28,921 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 23:47:28,921 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 23:47:28,981 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 23:47:28,987 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@5b557fb4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@71a7c6d7 [2022-07-11 23:47:28,988 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 23:47:28,994 INFO L276 IsEmpty]: Start isEmpty. Operand has 580 states, 463 states have (on average 1.4989200863930885) internal successors, (694), 496 states have internal predecessors, (694), 95 states have call successors, (95), 20 states have call predecessors, (95), 20 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) [2022-07-11 23:47:28,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-11 23:47:28,999 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:29,000 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] [2022-07-11 23:47:29,000 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:29,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:29,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1811520219, now seen corresponding path program 1 times [2022-07-11 23:47:29,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:29,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997667980] [2022-07-11 23:47:29,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:29,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:29,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:29,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:47:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:29,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:47:29,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:47:29,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:29,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997667980] [2022-07-11 23:47:29,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997667980] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:29,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:29,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:47:29,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966586599] [2022-07-11 23:47:29,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:29,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:47:29,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:29,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:47:29,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:47:29,477 INFO L87 Difference]: Start difference. First operand has 580 states, 463 states have (on average 1.4989200863930885) internal successors, (694), 496 states have internal predecessors, (694), 95 states have call successors, (95), 20 states have call predecessors, (95), 20 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-11 23:47:32,799 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:47:33,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:47:33,074 INFO L93 Difference]: Finished difference Result 1174 states and 1848 transitions. [2022-07-11 23:47:33,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:47:33,077 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-07-11 23:47:33,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:47:33,102 INFO L225 Difference]: With dead ends: 1174 [2022-07-11 23:47:33,102 INFO L226 Difference]: Without dead ends: 657 [2022-07-11 23:47:33,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:47:33,132 INFO L413 NwaCegarLoop]: 771 mSDtfsCounter, 400 mSDsluCounter, 1385 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 238 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 2156 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:47:33,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 2156 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 785 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2022-07-11 23:47:33,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-07-11 23:47:33,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 579. [2022-07-11 23:47:33,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 462 states have (on average 1.4567099567099566) internal successors, (673), 493 states have internal predecessors, (673), 95 states have call successors, (95), 22 states have call predecessors, (95), 21 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-07-11 23:47:33,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 840 transitions. [2022-07-11 23:47:33,231 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 840 transitions. Word has length 26 [2022-07-11 23:47:33,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:47:33,232 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 840 transitions. [2022-07-11 23:47:33,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-11 23:47:33,232 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 840 transitions. [2022-07-11 23:47:33,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-11 23:47:33,233 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:33,233 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:47:33,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 23:47:33,234 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:33,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:33,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1723209200, now seen corresponding path program 1 times [2022-07-11 23:47:33,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:33,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445461448] [2022-07-11 23:47:33,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:33,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:33,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:47:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:33,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:47:33,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:33,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:47:33,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:33,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445461448] [2022-07-11 23:47:33,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445461448] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:33,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:33,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-11 23:47:33,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225579315] [2022-07-11 23:47:33,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:33,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:47:33,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:33,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:47:33,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:47:33,478 INFO L87 Difference]: Start difference. First operand 579 states and 840 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 23:47:37,387 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:47:37,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:47:37,618 INFO L93 Difference]: Finished difference Result 1217 states and 1784 transitions. [2022-07-11 23:47:37,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-11 23:47:37,618 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2022-07-11 23:47:37,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:47:37,624 INFO L225 Difference]: With dead ends: 1217 [2022-07-11 23:47:37,624 INFO L226 Difference]: Without dead ends: 657 [2022-07-11 23:47:37,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-11 23:47:37,627 INFO L413 NwaCegarLoop]: 761 mSDtfsCounter, 366 mSDsluCounter, 2004 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 228 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 2765 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:47:37,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 2765 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 986 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2022-07-11 23:47:37,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-07-11 23:47:37,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 579. [2022-07-11 23:47:37,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 462 states have (on average 1.4545454545454546) internal successors, (672), 493 states have internal predecessors, (672), 95 states have call successors, (95), 22 states have call predecessors, (95), 21 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-07-11 23:47:37,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 839 transitions. [2022-07-11 23:47:37,672 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 839 transitions. Word has length 29 [2022-07-11 23:47:37,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:47:37,672 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 839 transitions. [2022-07-11 23:47:37,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 23:47:37,672 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 839 transitions. [2022-07-11 23:47:37,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-11 23:47:37,673 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:37,674 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] [2022-07-11 23:47:37,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-11 23:47:37,674 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:37,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:37,674 INFO L85 PathProgramCache]: Analyzing trace with hash 51194362, now seen corresponding path program 1 times [2022-07-11 23:47:37,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:37,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050616888] [2022-07-11 23:47:37,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:37,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:37,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:47:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:37,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:47:37,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:47:37,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:37,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050616888] [2022-07-11 23:47:37,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050616888] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:37,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:37,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:47:37,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066788498] [2022-07-11 23:47:37,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:37,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:47:37,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:37,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:47:37,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:47:37,914 INFO L87 Difference]: Start difference. First operand 579 states and 839 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 23:47:41,121 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:47:42,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:47:42,115 INFO L93 Difference]: Finished difference Result 1542 states and 2294 transitions. [2022-07-11 23:47:42,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:47:42,116 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2022-07-11 23:47:42,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:47:42,122 INFO L225 Difference]: With dead ends: 1542 [2022-07-11 23:47:42,125 INFO L226 Difference]: Without dead ends: 1127 [2022-07-11 23:47:42,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:47:42,129 INFO L413 NwaCegarLoop]: 940 mSDtfsCounter, 1330 mSDsluCounter, 1485 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 426 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1367 SdHoareTripleChecker+Valid, 2425 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:47:42,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1367 Valid, 2425 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 1032 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2022-07-11 23:47:42,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-07-11 23:47:42,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 1008. [2022-07-11 23:47:42,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 832 states have (on average 1.4399038461538463) internal successors, (1198), 859 states have internal predecessors, (1198), 132 states have call successors, (132), 40 states have call predecessors, (132), 43 states have return successors, (155), 116 states have call predecessors, (155), 117 states have call successors, (155) [2022-07-11 23:47:42,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1485 transitions. [2022-07-11 23:47:42,191 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 1485 transitions. Word has length 33 [2022-07-11 23:47:42,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:47:42,192 INFO L495 AbstractCegarLoop]: Abstraction has 1008 states and 1485 transitions. [2022-07-11 23:47:42,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 23:47:42,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 1485 transitions. [2022-07-11 23:47:42,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-11 23:47:42,200 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:42,200 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:47:42,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-11 23:47:42,201 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:42,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:42,201 INFO L85 PathProgramCache]: Analyzing trace with hash -778149095, now seen corresponding path program 1 times [2022-07-11 23:47:42,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:42,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787714424] [2022-07-11 23:47:42,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:42,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:42,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:42,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:47:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:42,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:47:42,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:42,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 23:47:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:42,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:47:42,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:42,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787714424] [2022-07-11 23:47:42,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787714424] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:42,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:42,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:47:42,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899342794] [2022-07-11 23:47:42,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:42,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:47:42,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:42,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:47:42,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:47:42,461 INFO L87 Difference]: Start difference. First operand 1008 states and 1485 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 23:47:45,612 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:47:46,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:47:46,498 INFO L93 Difference]: Finished difference Result 1879 states and 2849 transitions. [2022-07-11 23:47:46,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:47:46,499 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-07-11 23:47:46,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:47:46,508 INFO L225 Difference]: With dead ends: 1879 [2022-07-11 23:47:46,508 INFO L226 Difference]: Without dead ends: 1860 [2022-07-11 23:47:46,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:47:46,511 INFO L413 NwaCegarLoop]: 795 mSDtfsCounter, 1460 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 406 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1530 SdHoareTripleChecker+Valid, 2050 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-07-11 23:47:46,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1530 Valid, 2050 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 823 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2022-07-11 23:47:46,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2022-07-11 23:47:46,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1624. [2022-07-11 23:47:46,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1348 states have (on average 1.4614243323442135) internal successors, (1970), 1393 states have internal predecessors, (1970), 203 states have call successors, (203), 65 states have call predecessors, (203), 72 states have return successors, (264), 178 states have call predecessors, (264), 188 states have call successors, (264) [2022-07-11 23:47:46,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2437 transitions. [2022-07-11 23:47:46,570 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2437 transitions. Word has length 45 [2022-07-11 23:47:46,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:47:46,571 INFO L495 AbstractCegarLoop]: Abstraction has 1624 states and 2437 transitions. [2022-07-11 23:47:46,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 23:47:46,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2437 transitions. [2022-07-11 23:47:46,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-11 23:47:46,573 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:46,573 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:47:46,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-11 23:47:46,573 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:46,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:46,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1291674765, now seen corresponding path program 1 times [2022-07-11 23:47:46,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:46,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430075418] [2022-07-11 23:47:46,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:46,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:46,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:46,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:47:46,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:46,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:47:46,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:46,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:47:46,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:46,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430075418] [2022-07-11 23:47:46,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430075418] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:46,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:46,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:47:46,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594858858] [2022-07-11 23:47:46,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:46,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:47:46,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:46,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:47:46,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:47:46,827 INFO L87 Difference]: Start difference. First operand 1624 states and 2437 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 23:47:50,117 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:47:50,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:47:50,481 INFO L93 Difference]: Finished difference Result 1856 states and 2829 transitions. [2022-07-11 23:47:50,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:47:50,482 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2022-07-11 23:47:50,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:47:50,489 INFO L225 Difference]: With dead ends: 1856 [2022-07-11 23:47:50,490 INFO L226 Difference]: Without dead ends: 1852 [2022-07-11 23:47:50,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:47:50,491 INFO L413 NwaCegarLoop]: 735 mSDtfsCounter, 467 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 246 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 2039 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:47:50,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 2039 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 771 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2022-07-11 23:47:50,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2022-07-11 23:47:50,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1657. [2022-07-11 23:47:50,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1379 states have (on average 1.4612037708484409) internal successors, (2015), 1421 states have internal predecessors, (2015), 204 states have call successors, (204), 67 states have call predecessors, (204), 73 states have return successors, (265), 179 states have call predecessors, (265), 189 states have call successors, (265) [2022-07-11 23:47:50,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 2484 transitions. [2022-07-11 23:47:50,534 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 2484 transitions. Word has length 43 [2022-07-11 23:47:50,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:47:50,534 INFO L495 AbstractCegarLoop]: Abstraction has 1657 states and 2484 transitions. [2022-07-11 23:47:50,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 23:47:50,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 2484 transitions. [2022-07-11 23:47:50,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-11 23:47:50,535 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:50,535 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:47:50,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-11 23:47:50,535 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:50,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:50,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1850160334, now seen corresponding path program 1 times [2022-07-11 23:47:50,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:50,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912059958] [2022-07-11 23:47:50,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:50,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:50,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:47:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:50,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:47:50,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:50,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:47:50,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:50,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912059958] [2022-07-11 23:47:50,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912059958] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:50,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:50,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:47:50,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797109959] [2022-07-11 23:47:50,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:50,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:47:50,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:50,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:47:50,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:47:50,724 INFO L87 Difference]: Start difference. First operand 1657 states and 2484 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 23:47:53,917 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:47:55,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:47:55,327 INFO L93 Difference]: Finished difference Result 3293 states and 5099 transitions. [2022-07-11 23:47:55,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:47:55,328 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2022-07-11 23:47:55,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:47:55,340 INFO L225 Difference]: With dead ends: 3293 [2022-07-11 23:47:55,340 INFO L226 Difference]: Without dead ends: 3290 [2022-07-11 23:47:55,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:47:55,342 INFO L413 NwaCegarLoop]: 1177 mSDtfsCounter, 925 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 310 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 954 SdHoareTripleChecker+Valid, 2956 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:47:55,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [954 Valid, 2956 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 1186 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2022-07-11 23:47:55,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3290 states. [2022-07-11 23:47:55,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3290 to 2657. [2022-07-11 23:47:55,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2657 states, 2246 states have (on average 1.4746215494211932) internal successors, (3312), 2298 states have internal predecessors, (3312), 292 states have call successors, (292), 107 states have call predecessors, (292), 118 states have return successors, (418), 262 states have call predecessors, (418), 277 states have call successors, (418) [2022-07-11 23:47:55,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2657 states to 2657 states and 4022 transitions. [2022-07-11 23:47:55,415 INFO L78 Accepts]: Start accepts. Automaton has 2657 states and 4022 transitions. Word has length 45 [2022-07-11 23:47:55,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:47:55,416 INFO L495 AbstractCegarLoop]: Abstraction has 2657 states and 4022 transitions. [2022-07-11 23:47:55,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 23:47:55,416 INFO L276 IsEmpty]: Start isEmpty. Operand 2657 states and 4022 transitions. [2022-07-11 23:47:55,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-11 23:47:55,417 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:55,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:47:55,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-11 23:47:55,417 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:55,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:55,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1615003555, now seen corresponding path program 1 times [2022-07-11 23:47:55,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:55,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217693838] [2022-07-11 23:47:55,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:55,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:55,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:47:55,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:55,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:47:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:55,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 23:47:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:55,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-11 23:47:55,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:55,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:47:55,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:55,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217693838] [2022-07-11 23:47:55,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217693838] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:55,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:55,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:47:55,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881296443] [2022-07-11 23:47:55,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:55,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:47:55,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:55,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:47:55,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:47:55,665 INFO L87 Difference]: Start difference. First operand 2657 states and 4022 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-11 23:47:59,236 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:00,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:48:00,745 INFO L93 Difference]: Finished difference Result 3942 states and 6165 transitions. [2022-07-11 23:48:00,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-11 23:48:00,746 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2022-07-11 23:48:00,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:48:00,764 INFO L225 Difference]: With dead ends: 3942 [2022-07-11 23:48:00,765 INFO L226 Difference]: Without dead ends: 3937 [2022-07-11 23:48:00,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-07-11 23:48:00,768 INFO L413 NwaCegarLoop]: 1083 mSDtfsCounter, 1251 mSDsluCounter, 1824 mSDsCounter, 0 mSdLazyCounter, 1635 mSolverCounterSat, 602 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1272 SdHoareTripleChecker+Valid, 2907 SdHoareTripleChecker+Invalid, 2238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 1635 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:48:00,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1272 Valid, 2907 Invalid, 2238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 1635 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2022-07-11 23:48:00,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3937 states. [2022-07-11 23:48:00,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3937 to 3272. [2022-07-11 23:48:00,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3272 states, 2761 states have (on average 1.4791742122419413) internal successors, (4084), 2832 states have internal predecessors, (4084), 364 states have call successors, (364), 126 states have call predecessors, (364), 146 states have return successors, (557), 324 states have call predecessors, (557), 349 states have call successors, (557) [2022-07-11 23:48:00,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3272 states to 3272 states and 5005 transitions. [2022-07-11 23:48:00,867 INFO L78 Accepts]: Start accepts. Automaton has 3272 states and 5005 transitions. Word has length 48 [2022-07-11 23:48:00,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:48:00,868 INFO L495 AbstractCegarLoop]: Abstraction has 3272 states and 5005 transitions. [2022-07-11 23:48:00,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-11 23:48:00,868 INFO L276 IsEmpty]: Start isEmpty. Operand 3272 states and 5005 transitions. [2022-07-11 23:48:00,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-11 23:48:00,869 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:48:00,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:48:00,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-11 23:48:00,869 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:48:00,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:48:00,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1759276290, now seen corresponding path program 1 times [2022-07-11 23:48:00,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:48:00,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458517298] [2022-07-11 23:48:00,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:00,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:48:00,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:01,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:48:01,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:01,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:48:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:01,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:48:01,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:48:01,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458517298] [2022-07-11 23:48:01,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458517298] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:48:01,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:48:01,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-11 23:48:01,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948961192] [2022-07-11 23:48:01,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:48:01,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:48:01,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:48:01,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:48:01,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:48:01,129 INFO L87 Difference]: Start difference. First operand 3272 states and 5005 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-11 23:48:04,313 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:06,399 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:07,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:48:07,465 INFO L93 Difference]: Finished difference Result 7046 states and 10914 transitions. [2022-07-11 23:48:07,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-11 23:48:07,466 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 4 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 46 [2022-07-11 23:48:07,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:48:07,480 INFO L225 Difference]: With dead ends: 7046 [2022-07-11 23:48:07,480 INFO L226 Difference]: Without dead ends: 4021 [2022-07-11 23:48:07,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-07-11 23:48:07,488 INFO L413 NwaCegarLoop]: 903 mSDtfsCounter, 2317 mSDsluCounter, 1376 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 769 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2364 SdHoareTripleChecker+Valid, 2279 SdHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 769 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:48:07,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2364 Valid, 2279 Invalid, 1936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [769 Valid, 1165 Invalid, 2 Unknown, 0 Unchecked, 6.1s Time] [2022-07-11 23:48:07,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4021 states. [2022-07-11 23:48:07,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4021 to 3266. [2022-07-11 23:48:07,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3266 states, 2755 states have (on average 1.4773139745916515) internal successors, (4070), 2826 states have internal predecessors, (4070), 364 states have call successors, (364), 126 states have call predecessors, (364), 146 states have return successors, (557), 324 states have call predecessors, (557), 349 states have call successors, (557) [2022-07-11 23:48:07,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3266 states to 3266 states and 4991 transitions. [2022-07-11 23:48:07,591 INFO L78 Accepts]: Start accepts. Automaton has 3266 states and 4991 transitions. Word has length 46 [2022-07-11 23:48:07,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:48:07,592 INFO L495 AbstractCegarLoop]: Abstraction has 3266 states and 4991 transitions. [2022-07-11 23:48:07,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-11 23:48:07,592 INFO L276 IsEmpty]: Start isEmpty. Operand 3266 states and 4991 transitions. [2022-07-11 23:48:07,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-11 23:48:07,593 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:48:07,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:48:07,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-11 23:48:07,593 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:48:07,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:48:07,594 INFO L85 PathProgramCache]: Analyzing trace with hash 436509709, now seen corresponding path program 1 times [2022-07-11 23:48:07,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:48:07,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565820153] [2022-07-11 23:48:07,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:07,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:48:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:07,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:48:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:07,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:48:07,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:07,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-11 23:48:07,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:07,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:48:07,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:48:07,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565820153] [2022-07-11 23:48:07,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565820153] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:48:07,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:48:07,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-11 23:48:07,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255990645] [2022-07-11 23:48:07,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:48:07,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:48:07,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:48:07,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:48:07,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:48:07,785 INFO L87 Difference]: Start difference. First operand 3266 states and 4991 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 23:48:11,301 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:12,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:48:12,800 INFO L93 Difference]: Finished difference Result 10834 states and 17245 transitions. [2022-07-11 23:48:12,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-11 23:48:12,800 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-07-11 23:48:12,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:48:12,846 INFO L225 Difference]: With dead ends: 10834 [2022-07-11 23:48:12,846 INFO L226 Difference]: Without dead ends: 7785 [2022-07-11 23:48:12,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2022-07-11 23:48:12,859 INFO L413 NwaCegarLoop]: 954 mSDtfsCounter, 2093 mSDsluCounter, 1768 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 707 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2169 SdHoareTripleChecker+Valid, 2722 SdHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 707 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:48:12,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2169 Valid, 2722 Invalid, 1936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [707 Valid, 1228 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2022-07-11 23:48:12,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7785 states. [2022-07-11 23:48:13,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7785 to 6900. [2022-07-11 23:48:13,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 5812 states have (on average 1.4893324156916723) internal successors, (8656), 6037 states have internal predecessors, (8656), 801 states have call successors, (801), 234 states have call predecessors, (801), 286 states have return successors, (1391), 659 states have call predecessors, (1391), 789 states have call successors, (1391) [2022-07-11 23:48:13,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 10848 transitions. [2022-07-11 23:48:13,102 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 10848 transitions. Word has length 47 [2022-07-11 23:48:13,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:48:13,102 INFO L495 AbstractCegarLoop]: Abstraction has 6900 states and 10848 transitions. [2022-07-11 23:48:13,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 23:48:13,103 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 10848 transitions. [2022-07-11 23:48:13,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-11 23:48:13,104 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:48:13,104 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:48:13,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-11 23:48:13,104 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:48:13,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:48:13,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1022322752, now seen corresponding path program 1 times [2022-07-11 23:48:13,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:48:13,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074582130] [2022-07-11 23:48:13,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:13,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:48:13,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:13,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:48:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:13,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:48:13,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:13,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 23:48:13,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:13,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-11 23:48:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:13,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:48:13,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:48:13,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074582130] [2022-07-11 23:48:13,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074582130] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:48:13,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:48:13,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-11 23:48:13,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878632811] [2022-07-11 23:48:13,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:48:13,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 23:48:13,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:48:13,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 23:48:13,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:48:13,314 INFO L87 Difference]: Start difference. First operand 6900 states and 10848 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-11 23:48:16,876 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:18,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:48:18,887 INFO L93 Difference]: Finished difference Result 7819 states and 12472 transitions. [2022-07-11 23:48:18,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-11 23:48:18,887 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-07-11 23:48:18,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:48:18,910 INFO L225 Difference]: With dead ends: 7819 [2022-07-11 23:48:18,910 INFO L226 Difference]: Without dead ends: 7813 [2022-07-11 23:48:18,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2022-07-11 23:48:18,915 INFO L413 NwaCegarLoop]: 1056 mSDtfsCounter, 2723 mSDsluCounter, 2145 mSDsCounter, 0 mSdLazyCounter, 2060 mSolverCounterSat, 1105 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2785 SdHoareTripleChecker+Valid, 3201 SdHoareTripleChecker+Invalid, 3166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1105 IncrementalHoareTripleChecker+Valid, 2060 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:48:18,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2785 Valid, 3201 Invalid, 3166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1105 Valid, 2060 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2022-07-11 23:48:18,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7813 states. [2022-07-11 23:48:19,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7813 to 6900. [2022-07-11 23:48:19,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 5812 states have (on average 1.4891603578802477) internal successors, (8655), 6037 states have internal predecessors, (8655), 801 states have call successors, (801), 234 states have call predecessors, (801), 286 states have return successors, (1391), 659 states have call predecessors, (1391), 789 states have call successors, (1391) [2022-07-11 23:48:19,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 10847 transitions. [2022-07-11 23:48:19,293 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 10847 transitions. Word has length 49 [2022-07-11 23:48:19,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:48:19,294 INFO L495 AbstractCegarLoop]: Abstraction has 6900 states and 10847 transitions. [2022-07-11 23:48:19,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-11 23:48:19,294 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 10847 transitions. [2022-07-11 23:48:19,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-11 23:48:19,295 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:48:19,295 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:48:19,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-11 23:48:19,296 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:48:19,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:48:19,296 INFO L85 PathProgramCache]: Analyzing trace with hash 677869713, now seen corresponding path program 1 times [2022-07-11 23:48:19,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:48:19,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254202832] [2022-07-11 23:48:19,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:19,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:48:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:19,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:48:19,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:19,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:48:19,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:19,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-11 23:48:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:19,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-11 23:48:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:19,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:48:19,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:48:19,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254202832] [2022-07-11 23:48:19,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254202832] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:48:19,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:48:19,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-11 23:48:19,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485889166] [2022-07-11 23:48:19,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:48:19,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 23:48:19,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:48:19,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 23:48:19,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:48:19,503 INFO L87 Difference]: Start difference. First operand 6900 states and 10847 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-11 23:48:23,842 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:25,866 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:28,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:48:28,514 INFO L93 Difference]: Finished difference Result 7815 states and 12466 transitions. [2022-07-11 23:48:28,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-11 23:48:28,515 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-07-11 23:48:28,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:48:28,536 INFO L225 Difference]: With dead ends: 7815 [2022-07-11 23:48:28,536 INFO L226 Difference]: Without dead ends: 7809 [2022-07-11 23:48:28,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2022-07-11 23:48:28,541 INFO L413 NwaCegarLoop]: 1056 mSDtfsCounter, 2322 mSDsluCounter, 2490 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 849 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2385 SdHoareTripleChecker+Valid, 3546 SdHoareTripleChecker+Invalid, 3443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 849 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:48:28,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2385 Valid, 3546 Invalid, 3443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [849 Valid, 2592 Invalid, 2 Unknown, 0 Unchecked, 8.4s Time] [2022-07-11 23:48:28,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7809 states. [2022-07-11 23:48:28,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7809 to 6900. [2022-07-11 23:48:28,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 5812 states have (on average 1.488988300068823) internal successors, (8654), 6037 states have internal predecessors, (8654), 801 states have call successors, (801), 234 states have call predecessors, (801), 286 states have return successors, (1391), 659 states have call predecessors, (1391), 789 states have call successors, (1391) [2022-07-11 23:48:28,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 10846 transitions. [2022-07-11 23:48:28,854 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 10846 transitions. Word has length 49 [2022-07-11 23:48:28,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:48:28,855 INFO L495 AbstractCegarLoop]: Abstraction has 6900 states and 10846 transitions. [2022-07-11 23:48:28,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-11 23:48:28,855 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 10846 transitions. [2022-07-11 23:48:28,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-11 23:48:28,857 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:48:28,857 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:48:28,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-11 23:48:28,858 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:48:28,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:48:28,858 INFO L85 PathProgramCache]: Analyzing trace with hash -376802648, now seen corresponding path program 1 times [2022-07-11 23:48:28,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:48:28,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852407564] [2022-07-11 23:48:28,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:28,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:48:28,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:28,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:48:28,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:28,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:48:28,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:29,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-11 23:48:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:29,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-11 23:48:29,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:29,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:48:29,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:48:29,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852407564] [2022-07-11 23:48:29,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852407564] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:48:29,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:48:29,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-11 23:48:29,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144771596] [2022-07-11 23:48:29,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:48:29,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 23:48:29,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:48:29,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 23:48:29,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:48:29,071 INFO L87 Difference]: Start difference. First operand 6900 states and 10846 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-11 23:48:33,550 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:35,588 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:36,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:48:36,642 INFO L93 Difference]: Finished difference Result 7824 states and 12487 transitions. [2022-07-11 23:48:36,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-11 23:48:36,643 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2022-07-11 23:48:36,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:48:36,663 INFO L225 Difference]: With dead ends: 7824 [2022-07-11 23:48:36,663 INFO L226 Difference]: Without dead ends: 7807 [2022-07-11 23:48:36,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-07-11 23:48:36,669 INFO L413 NwaCegarLoop]: 712 mSDtfsCounter, 683 mSDsluCounter, 2806 mSDsCounter, 0 mSdLazyCounter, 2135 mSolverCounterSat, 278 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 2415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 2135 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:48:36,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 3518 Invalid, 2415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 2135 Invalid, 2 Unknown, 0 Unchecked, 7.2s Time] [2022-07-11 23:48:36,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7807 states. [2022-07-11 23:48:36,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7807 to 6904. [2022-07-11 23:48:36,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6904 states, 5815 states have (on average 1.4885640584694755) internal successors, (8656), 6042 states have internal predecessors, (8656), 800 states have call successors, (800), 234 states have call predecessors, (800), 288 states have return successors, (1397), 658 states have call predecessors, (1397), 788 states have call successors, (1397) [2022-07-11 23:48:36,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6904 states to 6904 states and 10853 transitions. [2022-07-11 23:48:36,925 INFO L78 Accepts]: Start accepts. Automaton has 6904 states and 10853 transitions. Word has length 50 [2022-07-11 23:48:36,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:48:36,925 INFO L495 AbstractCegarLoop]: Abstraction has 6904 states and 10853 transitions. [2022-07-11 23:48:36,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-11 23:48:36,926 INFO L276 IsEmpty]: Start isEmpty. Operand 6904 states and 10853 transitions. [2022-07-11 23:48:36,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-11 23:48:36,927 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:48:36,927 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:48:36,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-11 23:48:36,927 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:48:36,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:48:36,928 INFO L85 PathProgramCache]: Analyzing trace with hash 286289769, now seen corresponding path program 1 times [2022-07-11 23:48:36,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:48:36,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242390256] [2022-07-11 23:48:36,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:36,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:48:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:37,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:48:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:37,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:48:37,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:37,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 23:48:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:37,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-11 23:48:37,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:37,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:48:37,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:48:37,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242390256] [2022-07-11 23:48:37,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242390256] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:48:37,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:48:37,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-11 23:48:37,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761378432] [2022-07-11 23:48:37,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:48:37,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 23:48:37,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:48:37,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 23:48:37,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:48:37,118 INFO L87 Difference]: Start difference. First operand 6904 states and 10853 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-11 23:48:42,206 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:44,227 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:45,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:48:45,191 INFO L93 Difference]: Finished difference Result 7822 states and 12483 transitions. [2022-07-11 23:48:45,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-11 23:48:45,192 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2022-07-11 23:48:45,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:48:45,228 INFO L225 Difference]: With dead ends: 7822 [2022-07-11 23:48:45,228 INFO L226 Difference]: Without dead ends: 7800 [2022-07-11 23:48:45,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-07-11 23:48:45,236 INFO L413 NwaCegarLoop]: 712 mSDtfsCounter, 682 mSDsluCounter, 2806 mSDsCounter, 0 mSdLazyCounter, 2129 mSolverCounterSat, 273 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 2404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 2129 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:48:45,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [708 Valid, 3518 Invalid, 2404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 2129 Invalid, 2 Unknown, 0 Unchecked, 7.7s Time] [2022-07-11 23:48:45,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7800 states. [2022-07-11 23:48:45,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7800 to 6897. [2022-07-11 23:48:45,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6897 states, 5811 states have (on average 1.4887282739631733) internal successors, (8651), 6038 states have internal predecessors, (8651), 798 states have call successors, (798), 233 states have call predecessors, (798), 287 states have return successors, (1395), 656 states have call predecessors, (1395), 786 states have call successors, (1395) [2022-07-11 23:48:45,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6897 states to 6897 states and 10844 transitions. [2022-07-11 23:48:45,554 INFO L78 Accepts]: Start accepts. Automaton has 6897 states and 10844 transitions. Word has length 51 [2022-07-11 23:48:45,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:48:45,555 INFO L495 AbstractCegarLoop]: Abstraction has 6897 states and 10844 transitions. [2022-07-11 23:48:45,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-11 23:48:45,555 INFO L276 IsEmpty]: Start isEmpty. Operand 6897 states and 10844 transitions. [2022-07-11 23:48:45,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-11 23:48:45,560 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:48:45,560 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:48:45,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-11 23:48:45,560 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:48:45,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:48:45,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1945256571, now seen corresponding path program 1 times [2022-07-11 23:48:45,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:48:45,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561943872] [2022-07-11 23:48:45,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:45,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:48:45,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:45,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:48:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:45,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:48:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:45,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-11 23:48:45,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:45,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:48:45,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:48:45,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561943872] [2022-07-11 23:48:45,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561943872] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:48:45,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:48:45,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-11 23:48:45,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830582172] [2022-07-11 23:48:45,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:48:45,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:48:45,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:48:45,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:48:45,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:48:45,732 INFO L87 Difference]: Start difference. First operand 6897 states and 10844 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 23:48:49,560 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:50,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:48:50,355 INFO L93 Difference]: Finished difference Result 13804 states and 22175 transitions. [2022-07-11 23:48:50,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 23:48:50,355 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-07-11 23:48:50,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:48:50,375 INFO L225 Difference]: With dead ends: 13804 [2022-07-11 23:48:50,375 INFO L226 Difference]: Without dead ends: 8064 [2022-07-11 23:48:50,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-11 23:48:50,396 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 411 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 236 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 2070 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:48:50,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 2070 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 921 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2022-07-11 23:48:50,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8064 states. [2022-07-11 23:48:50,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8064 to 7053. [2022-07-11 23:48:50,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7053 states, 5967 states have (on average 1.4799731858555387) internal successors, (8831), 6194 states have internal predecessors, (8831), 798 states have call successors, (798), 233 states have call predecessors, (798), 287 states have return successors, (1395), 656 states have call predecessors, (1395), 786 states have call successors, (1395) [2022-07-11 23:48:50,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7053 states to 7053 states and 11024 transitions. [2022-07-11 23:48:50,653 INFO L78 Accepts]: Start accepts. Automaton has 7053 states and 11024 transitions. Word has length 52 [2022-07-11 23:48:50,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:48:50,654 INFO L495 AbstractCegarLoop]: Abstraction has 7053 states and 11024 transitions. [2022-07-11 23:48:50,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 23:48:50,654 INFO L276 IsEmpty]: Start isEmpty. Operand 7053 states and 11024 transitions. [2022-07-11 23:48:50,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-11 23:48:50,656 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:48:50,656 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:48:50,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-11 23:48:50,656 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:48:50,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:48:50,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1217127572, now seen corresponding path program 1 times [2022-07-11 23:48:50,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:48:50,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727979187] [2022-07-11 23:48:50,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:50,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:48:50,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:50,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:48:50,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:50,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:48:50,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:50,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-11 23:48:50,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:50,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:48:50,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:48:50,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727979187] [2022-07-11 23:48:50,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727979187] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:48:50,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:48:50,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:48:50,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108741013] [2022-07-11 23:48:50,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:48:50,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:48:50,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:48:50,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:48:50,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:48:50,795 INFO L87 Difference]: Start difference. First operand 7053 states and 11024 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 23:48:54,800 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:55,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:48:55,575 INFO L93 Difference]: Finished difference Result 8020 states and 12715 transitions. [2022-07-11 23:48:55,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-11 23:48:55,575 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2022-07-11 23:48:55,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:48:55,596 INFO L225 Difference]: With dead ends: 8020 [2022-07-11 23:48:55,596 INFO L226 Difference]: Without dead ends: 8002 [2022-07-11 23:48:55,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:48:55,601 INFO L413 NwaCegarLoop]: 710 mSDtfsCounter, 868 mSDsluCounter, 2093 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 374 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 2803 SdHoareTripleChecker+Invalid, 1780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:48:55,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [891 Valid, 2803 Invalid, 1780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 1405 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2022-07-11 23:48:55,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8002 states. [2022-07-11 23:48:55,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8002 to 7051. [2022-07-11 23:48:55,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7051 states, 5966 states have (on average 1.479886020784445) internal successors, (8829), 6193 states have internal predecessors, (8829), 797 states have call successors, (797), 233 states have call predecessors, (797), 287 states have return successors, (1394), 655 states have call predecessors, (1394), 785 states have call successors, (1394) [2022-07-11 23:48:55,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7051 states to 7051 states and 11020 transitions. [2022-07-11 23:48:55,911 INFO L78 Accepts]: Start accepts. Automaton has 7051 states and 11020 transitions. Word has length 53 [2022-07-11 23:48:55,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:48:55,911 INFO L495 AbstractCegarLoop]: Abstraction has 7051 states and 11020 transitions. [2022-07-11 23:48:55,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 23:48:55,911 INFO L276 IsEmpty]: Start isEmpty. Operand 7051 states and 11020 transitions. [2022-07-11 23:48:55,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-11 23:48:55,914 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:48:55,914 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:48:55,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-11 23:48:55,914 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:48:55,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:48:55,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1937199149, now seen corresponding path program 1 times [2022-07-11 23:48:55,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:48:55,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796982539] [2022-07-11 23:48:55,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:55,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:48:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:56,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:48:56,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:56,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:48:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:48:56,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:48:56,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796982539] [2022-07-11 23:48:56,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796982539] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:48:56,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:48:56,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-11 23:48:56,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312803070] [2022-07-11 23:48:56,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:48:56,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:48:56,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:48:56,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:48:56,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:48:56,056 INFO L87 Difference]: Start difference. First operand 7051 states and 11020 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-11 23:48:59,375 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:00,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:49:00,199 INFO L93 Difference]: Finished difference Result 11721 states and 18614 transitions. [2022-07-11 23:49:00,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-11 23:49:00,199 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-07-11 23:49:00,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:49:00,220 INFO L225 Difference]: With dead ends: 11721 [2022-07-11 23:49:00,220 INFO L226 Difference]: Without dead ends: 7953 [2022-07-11 23:49:00,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-07-11 23:49:00,237 INFO L413 NwaCegarLoop]: 690 mSDtfsCounter, 1185 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 352 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 1858 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:49:00,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1236 Valid, 1858 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 906 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2022-07-11 23:49:00,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7953 states. [2022-07-11 23:49:00,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7953 to 7041. [2022-07-11 23:49:00,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7041 states, 5957 states have (on average 1.4787644787644787) internal successors, (8809), 6184 states have internal predecessors, (8809), 797 states have call successors, (797), 233 states have call predecessors, (797), 286 states have return successors, (1393), 654 states have call predecessors, (1393), 784 states have call successors, (1393) [2022-07-11 23:49:00,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7041 states to 7041 states and 10999 transitions. [2022-07-11 23:49:00,509 INFO L78 Accepts]: Start accepts. Automaton has 7041 states and 10999 transitions. Word has length 52 [2022-07-11 23:49:00,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:49:00,509 INFO L495 AbstractCegarLoop]: Abstraction has 7041 states and 10999 transitions. [2022-07-11 23:49:00,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-11 23:49:00,509 INFO L276 IsEmpty]: Start isEmpty. Operand 7041 states and 10999 transitions. [2022-07-11 23:49:00,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-11 23:49:00,512 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:49:00,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:49:00,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-11 23:49:00,513 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:49:00,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:49:00,513 INFO L85 PathProgramCache]: Analyzing trace with hash 872726643, now seen corresponding path program 1 times [2022-07-11 23:49:00,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:49:00,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148325617] [2022-07-11 23:49:00,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:49:00,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:49:00,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:00,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:49:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:00,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:49:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:00,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-11 23:49:00,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:00,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-11 23:49:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:49:00,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:49:00,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148325617] [2022-07-11 23:49:00,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148325617] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:49:00,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:49:00,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-11 23:49:00,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272531897] [2022-07-11 23:49:00,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:49:00,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 23:49:00,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:49:00,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 23:49:00,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:49:00,755 INFO L87 Difference]: Start difference. First operand 7041 states and 10999 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-11 23:49:04,919 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:05,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:49:05,977 INFO L93 Difference]: Finished difference Result 8024 states and 12754 transitions. [2022-07-11 23:49:05,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-11 23:49:05,978 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2022-07-11 23:49:05,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:49:05,996 INFO L225 Difference]: With dead ends: 8024 [2022-07-11 23:49:05,996 INFO L226 Difference]: Without dead ends: 8008 [2022-07-11 23:49:05,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-07-11 23:49:05,999 INFO L413 NwaCegarLoop]: 703 mSDtfsCounter, 932 mSDsluCounter, 2603 mSDsCounter, 0 mSdLazyCounter, 1743 mSolverCounterSat, 479 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 3306 SdHoareTripleChecker+Invalid, 2223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 1743 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:49:05,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [955 Valid, 3306 Invalid, 2223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 1743 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2022-07-11 23:49:06,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8008 states. [2022-07-11 23:49:06,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8008 to 7047. [2022-07-11 23:49:06,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7047 states, 5960 states have (on average 1.4785234899328858) internal successors, (8812), 6190 states have internal predecessors, (8812), 797 states have call successors, (797), 233 states have call predecessors, (797), 289 states have return successors, (1415), 654 states have call predecessors, (1415), 784 states have call successors, (1415) [2022-07-11 23:49:06,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7047 states to 7047 states and 11024 transitions. [2022-07-11 23:49:06,291 INFO L78 Accepts]: Start accepts. Automaton has 7047 states and 11024 transitions. Word has length 55 [2022-07-11 23:49:06,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:49:06,291 INFO L495 AbstractCegarLoop]: Abstraction has 7047 states and 11024 transitions. [2022-07-11 23:49:06,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-11 23:49:06,291 INFO L276 IsEmpty]: Start isEmpty. Operand 7047 states and 11024 transitions. [2022-07-11 23:49:06,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-11 23:49:06,293 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:49:06,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:49:06,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-11 23:49:06,293 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:49:06,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:49:06,294 INFO L85 PathProgramCache]: Analyzing trace with hash 555700014, now seen corresponding path program 1 times [2022-07-11 23:49:06,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:49:06,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898577204] [2022-07-11 23:49:06,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:49:06,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:49:06,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:06,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:49:06,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:06,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:49:06,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:06,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:49:06,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:49:06,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898577204] [2022-07-11 23:49:06,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898577204] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:49:06,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:49:06,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:49:06,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487775468] [2022-07-11 23:49:06,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:49:06,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:49:06,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:49:06,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:49:06,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:49:06,461 INFO L87 Difference]: Start difference. First operand 7047 states and 11024 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 23:49:09,809 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:11,899 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:13,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:49:13,647 INFO L93 Difference]: Finished difference Result 10992 states and 17757 transitions. [2022-07-11 23:49:13,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:49:13,648 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2022-07-11 23:49:13,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:49:13,680 INFO L225 Difference]: With dead ends: 10992 [2022-07-11 23:49:13,681 INFO L226 Difference]: Without dead ends: 10979 [2022-07-11 23:49:13,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:49:13,688 INFO L413 NwaCegarLoop]: 1203 mSDtfsCounter, 966 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 308 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 997 SdHoareTripleChecker+Valid, 3004 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:49:13,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [997 Valid, 3004 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 1184 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-07-11 23:49:13,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10979 states. [2022-07-11 23:49:14,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10979 to 8362. [2022-07-11 23:49:14,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8362 states, 7112 states have (on average 1.4822834645669292) internal successors, (10542), 7344 states have internal predecessors, (10542), 910 states have call successors, (910), 275 states have call predecessors, (910), 339 states have return successors, (1687), 773 states have call predecessors, (1687), 897 states have call successors, (1687) [2022-07-11 23:49:14,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8362 states to 8362 states and 13139 transitions. [2022-07-11 23:49:14,090 INFO L78 Accepts]: Start accepts. Automaton has 8362 states and 13139 transitions. Word has length 54 [2022-07-11 23:49:14,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:49:14,090 INFO L495 AbstractCegarLoop]: Abstraction has 8362 states and 13139 transitions. [2022-07-11 23:49:14,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 23:49:14,091 INFO L276 IsEmpty]: Start isEmpty. Operand 8362 states and 13139 transitions. [2022-07-11 23:49:14,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-11 23:49:14,092 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:49:14,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:49:14,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-11 23:49:14,092 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:49:14,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:49:14,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1129689134, now seen corresponding path program 1 times [2022-07-11 23:49:14,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:49:14,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218966005] [2022-07-11 23:49:14,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:49:14,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:49:14,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:14,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:49:14,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:14,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:49:14,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:49:14,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:49:14,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218966005] [2022-07-11 23:49:14,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218966005] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:49:14,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:49:14,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-11 23:49:14,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123401999] [2022-07-11 23:49:14,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:49:14,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:49:14,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:49:14,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:49:14,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:49:14,240 INFO L87 Difference]: Start difference. First operand 8362 states and 13139 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-11 23:49:17,635 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:18,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:49:18,473 INFO L93 Difference]: Finished difference Result 13163 states and 20813 transitions. [2022-07-11 23:49:18,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-11 23:49:18,474 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-07-11 23:49:18,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:49:18,516 INFO L225 Difference]: With dead ends: 13163 [2022-07-11 23:49:18,523 INFO L226 Difference]: Without dead ends: 8839 [2022-07-11 23:49:18,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-07-11 23:49:18,540 INFO L413 NwaCegarLoop]: 697 mSDtfsCounter, 1171 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 333 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1222 SdHoareTripleChecker+Valid, 1866 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:49:18,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1222 Valid, 1866 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 853 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2022-07-11 23:49:18,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8839 states. [2022-07-11 23:49:18,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8839 to 6799. [2022-07-11 23:49:18,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6799 states, 5772 states have (on average 1.48007623007623) internal successors, (8543), 5976 states have internal predecessors, (8543), 751 states have call successors, (751), 230 states have call predecessors, (751), 275 states have return successors, (1161), 623 states have call predecessors, (1161), 738 states have call successors, (1161) [2022-07-11 23:49:18,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6799 states to 6799 states and 10455 transitions. [2022-07-11 23:49:18,887 INFO L78 Accepts]: Start accepts. Automaton has 6799 states and 10455 transitions. Word has length 54 [2022-07-11 23:49:18,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:49:18,887 INFO L495 AbstractCegarLoop]: Abstraction has 6799 states and 10455 transitions. [2022-07-11 23:49:18,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-11 23:49:18,887 INFO L276 IsEmpty]: Start isEmpty. Operand 6799 states and 10455 transitions. [2022-07-11 23:49:18,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-11 23:49:18,890 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:49:18,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:49:18,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-11 23:49:18,890 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:49:18,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:49:18,891 INFO L85 PathProgramCache]: Analyzing trace with hash 238766756, now seen corresponding path program 1 times [2022-07-11 23:49:18,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:49:18,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709087124] [2022-07-11 23:49:18,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:49:18,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:49:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:18,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:49:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:19,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:49:19,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:19,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 23:49:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:19,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:49:19,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:49:19,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709087124] [2022-07-11 23:49:19,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709087124] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:49:19,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:49:19,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:49:19,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180778496] [2022-07-11 23:49:19,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:49:19,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:49:19,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:49:19,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:49:19,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:49:19,025 INFO L87 Difference]: Start difference. First operand 6799 states and 10455 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 23:49:22,637 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:23,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:49:23,628 INFO L93 Difference]: Finished difference Result 7691 states and 11990 transitions. [2022-07-11 23:49:23,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-11 23:49:23,628 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2022-07-11 23:49:23,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:49:23,643 INFO L225 Difference]: With dead ends: 7691 [2022-07-11 23:49:23,644 INFO L226 Difference]: Without dead ends: 7673 [2022-07-11 23:49:23,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:49:23,647 INFO L413 NwaCegarLoop]: 716 mSDtfsCounter, 861 mSDsluCounter, 2096 mSDsCounter, 0 mSdLazyCounter, 1401 mSolverCounterSat, 371 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 2812 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 1401 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:49:23,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [884 Valid, 2812 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 1401 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2022-07-11 23:49:23,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7673 states. [2022-07-11 23:49:23,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7673 to 6796. [2022-07-11 23:49:23,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6796 states, 5770 states have (on average 1.4800693240901213) internal successors, (8540), 5974 states have internal predecessors, (8540), 750 states have call successors, (750), 230 states have call predecessors, (750), 275 states have return successors, (1160), 622 states have call predecessors, (1160), 737 states have call successors, (1160) [2022-07-11 23:49:23,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6796 states to 6796 states and 10450 transitions. [2022-07-11 23:49:23,937 INFO L78 Accepts]: Start accepts. Automaton has 6796 states and 10450 transitions. Word has length 55 [2022-07-11 23:49:23,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:49:23,937 INFO L495 AbstractCegarLoop]: Abstraction has 6796 states and 10450 transitions. [2022-07-11 23:49:23,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 23:49:23,937 INFO L276 IsEmpty]: Start isEmpty. Operand 6796 states and 10450 transitions. [2022-07-11 23:49:23,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-11 23:49:23,938 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:49:23,939 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:49:23,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-11 23:49:23,939 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:49:23,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:49:23,939 INFO L85 PathProgramCache]: Analyzing trace with hash 499005845, now seen corresponding path program 1 times [2022-07-11 23:49:23,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:49:23,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584010640] [2022-07-11 23:49:23,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:49:23,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:49:23,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:24,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:49:24,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:24,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:49:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:49:24,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:49:24,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584010640] [2022-07-11 23:49:24,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584010640] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:49:24,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:49:24,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-11 23:49:24,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325459300] [2022-07-11 23:49:24,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:49:24,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:49:24,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:49:24,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:49:24,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:49:24,113 INFO L87 Difference]: Start difference. First operand 6796 states and 10450 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-11 23:49:27,273 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:29,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:49:29,064 INFO L93 Difference]: Finished difference Result 9126 states and 14313 transitions. [2022-07-11 23:49:29,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-11 23:49:29,066 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-07-11 23:49:29,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:49:29,081 INFO L225 Difference]: With dead ends: 9126 [2022-07-11 23:49:29,082 INFO L226 Difference]: Without dead ends: 9122 [2022-07-11 23:49:29,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-07-11 23:49:29,084 INFO L413 NwaCegarLoop]: 1149 mSDtfsCounter, 1660 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 535 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1718 SdHoareTripleChecker+Valid, 2790 SdHoareTripleChecker+Invalid, 1798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:49:29,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1718 Valid, 2790 Invalid, 1798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 1262 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2022-07-11 23:49:29,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9122 states. [2022-07-11 23:49:29,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9122 to 6807. [2022-07-11 23:49:29,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6807 states, 5780 states have (on average 1.479757785467128) internal successors, (8553), 5982 states have internal predecessors, (8553), 750 states have call successors, (750), 230 states have call predecessors, (750), 276 states have return successors, (1164), 625 states have call predecessors, (1164), 737 states have call successors, (1164) [2022-07-11 23:49:29,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6807 states to 6807 states and 10467 transitions. [2022-07-11 23:49:29,397 INFO L78 Accepts]: Start accepts. Automaton has 6807 states and 10467 transitions. Word has length 55 [2022-07-11 23:49:29,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:49:29,398 INFO L495 AbstractCegarLoop]: Abstraction has 6807 states and 10467 transitions. [2022-07-11 23:49:29,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-11 23:49:29,398 INFO L276 IsEmpty]: Start isEmpty. Operand 6807 states and 10467 transitions. [2022-07-11 23:49:29,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-11 23:49:29,399 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:49:29,399 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:49:29,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-11 23:49:29,400 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:49:29,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:49:29,400 INFO L85 PathProgramCache]: Analyzing trace with hash 499282675, now seen corresponding path program 1 times [2022-07-11 23:49:29,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:49:29,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606652103] [2022-07-11 23:49:29,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:49:29,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:49:29,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:29,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:49:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:29,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:49:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:29,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:49:29,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:49:29,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606652103] [2022-07-11 23:49:29,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606652103] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:49:29,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:49:29,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-11 23:49:29,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804119190] [2022-07-11 23:49:29,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:49:29,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-11 23:49:29,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:49:29,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-11 23:49:29,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-11 23:49:29,547 INFO L87 Difference]: Start difference. First operand 6807 states and 10467 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 23:49:34,335 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:35,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:49:35,144 INFO L93 Difference]: Finished difference Result 7650 states and 11920 transitions. [2022-07-11 23:49:35,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-11 23:49:35,146 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2022-07-11 23:49:35,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:49:35,165 INFO L225 Difference]: With dead ends: 7650 [2022-07-11 23:49:35,165 INFO L226 Difference]: Without dead ends: 7607 [2022-07-11 23:49:35,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:49:35,169 INFO L413 NwaCegarLoop]: 708 mSDtfsCounter, 410 mSDsluCounter, 2955 mSDsCounter, 0 mSdLazyCounter, 1440 mSolverCounterSat, 192 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 3663 SdHoareTripleChecker+Invalid, 1633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1440 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:49:35,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 3663 Invalid, 1633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1440 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2022-07-11 23:49:35,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7607 states. [2022-07-11 23:49:35,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7607 to 6777. [2022-07-11 23:49:35,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6777 states, 5751 states have (on average 1.480264301860546) internal successors, (8513), 5953 states have internal predecessors, (8513), 749 states have call successors, (749), 230 states have call predecessors, (749), 276 states have return successors, (1162), 624 states have call predecessors, (1162), 736 states have call successors, (1162) [2022-07-11 23:49:35,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6777 states to 6777 states and 10424 transitions. [2022-07-11 23:49:35,520 INFO L78 Accepts]: Start accepts. Automaton has 6777 states and 10424 transitions. Word has length 55 [2022-07-11 23:49:35,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:49:35,520 INFO L495 AbstractCegarLoop]: Abstraction has 6777 states and 10424 transitions. [2022-07-11 23:49:35,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 23:49:35,521 INFO L276 IsEmpty]: Start isEmpty. Operand 6777 states and 10424 transitions. [2022-07-11 23:49:35,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-11 23:49:35,522 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:49:35,523 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:49:35,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-11 23:49:35,523 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:49:35,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:49:35,523 INFO L85 PathProgramCache]: Analyzing trace with hash 948026652, now seen corresponding path program 1 times [2022-07-11 23:49:35,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:49:35,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794670684] [2022-07-11 23:49:35,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:49:35,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:49:35,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:35,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:49:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:35,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:49:35,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:35,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-11 23:49:35,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:35,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-11 23:49:35,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:35,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:49:35,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:49:35,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794670684] [2022-07-11 23:49:35,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794670684] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:49:35,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:49:35,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-11 23:49:35,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586399945] [2022-07-11 23:49:35,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:49:35,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 23:49:35,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:49:35,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 23:49:35,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:49:35,809 INFO L87 Difference]: Start difference. First operand 6777 states and 10424 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-11 23:49:39,980 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:40,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:49:40,950 INFO L93 Difference]: Finished difference Result 13421 states and 21123 transitions. [2022-07-11 23:49:40,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-11 23:49:40,951 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 60 [2022-07-11 23:49:40,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:49:40,968 INFO L225 Difference]: With dead ends: 13421 [2022-07-11 23:49:40,969 INFO L226 Difference]: Without dead ends: 7857 [2022-07-11 23:49:40,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-07-11 23:49:40,981 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 381 mSDsluCounter, 2420 mSDsCounter, 0 mSdLazyCounter, 1699 mSolverCounterSat, 229 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 3070 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 1699 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:49:40,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 3070 Invalid, 1929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 1699 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2022-07-11 23:49:40,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7857 states. [2022-07-11 23:49:41,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7857 to 6853. [2022-07-11 23:49:41,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6853 states, 5807 states have (on average 1.4756328568968486) internal successors, (8569), 6017 states have internal predecessors, (8569), 749 states have call successors, (749), 230 states have call predecessors, (749), 296 states have return successors, (1233), 636 states have call predecessors, (1233), 736 states have call successors, (1233) [2022-07-11 23:49:41,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6853 states to 6853 states and 10551 transitions. [2022-07-11 23:49:41,308 INFO L78 Accepts]: Start accepts. Automaton has 6853 states and 10551 transitions. Word has length 60 [2022-07-11 23:49:41,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:49:41,309 INFO L495 AbstractCegarLoop]: Abstraction has 6853 states and 10551 transitions. [2022-07-11 23:49:41,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-11 23:49:41,309 INFO L276 IsEmpty]: Start isEmpty. Operand 6853 states and 10551 transitions. [2022-07-11 23:49:41,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-11 23:49:41,310 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:49:41,310 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:49:41,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-11 23:49:41,311 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:49:41,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:49:41,311 INFO L85 PathProgramCache]: Analyzing trace with hash -749476623, now seen corresponding path program 1 times [2022-07-11 23:49:41,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:49:41,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546423807] [2022-07-11 23:49:41,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:49:41,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:49:41,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:41,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:49:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:41,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:49:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:41,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-11 23:49:41,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:41,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 23:49:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:41,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:49:41,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:49:41,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546423807] [2022-07-11 23:49:41,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546423807] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:49:41,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:49:41,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-11 23:49:41,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439658387] [2022-07-11 23:49:41,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:49:41,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-11 23:49:41,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:49:41,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-11 23:49:41,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:49:41,631 INFO L87 Difference]: Start difference. First operand 6853 states and 10551 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-11 23:49:46,240 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:47,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:49:47,454 INFO L93 Difference]: Finished difference Result 7755 states and 12177 transitions. [2022-07-11 23:49:47,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-11 23:49:47,455 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 62 [2022-07-11 23:49:47,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:49:47,469 INFO L225 Difference]: With dead ends: 7755 [2022-07-11 23:49:47,469 INFO L226 Difference]: Without dead ends: 7741 [2022-07-11 23:49:47,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-07-11 23:49:47,472 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 908 mSDsluCounter, 3500 mSDsCounter, 0 mSdLazyCounter, 2878 mSolverCounterSat, 473 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 932 SdHoareTripleChecker+Valid, 4150 SdHoareTripleChecker+Invalid, 3352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 473 IncrementalHoareTripleChecker+Valid, 2878 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:49:47,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [932 Valid, 4150 Invalid, 3352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [473 Valid, 2878 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2022-07-11 23:49:47,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7741 states. [2022-07-11 23:49:47,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7741 to 6855. [2022-07-11 23:49:47,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6855 states, 5808 states have (on average 1.475550964187328) internal successors, (8570), 6019 states have internal predecessors, (8570), 749 states have call successors, (749), 230 states have call predecessors, (749), 297 states have return successors, (1248), 636 states have call predecessors, (1248), 736 states have call successors, (1248) [2022-07-11 23:49:47,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6855 states to 6855 states and 10567 transitions. [2022-07-11 23:49:47,796 INFO L78 Accepts]: Start accepts. Automaton has 6855 states and 10567 transitions. Word has length 62 [2022-07-11 23:49:47,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:49:47,796 INFO L495 AbstractCegarLoop]: Abstraction has 6855 states and 10567 transitions. [2022-07-11 23:49:47,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-11 23:49:47,797 INFO L276 IsEmpty]: Start isEmpty. Operand 6855 states and 10567 transitions. [2022-07-11 23:49:47,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-11 23:49:47,798 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:49:47,798 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:49:47,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-11 23:49:47,799 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:49:47,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:49:47,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1416668636, now seen corresponding path program 1 times [2022-07-11 23:49:47,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:49:47,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523831093] [2022-07-11 23:49:47,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:49:47,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:49:47,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:47,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:49:47,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:47,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:49:47,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:47,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-11 23:49:47,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:47,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-11 23:49:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:48,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:49:48,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:48,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-11 23:49:48,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:49:48,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:49:48,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523831093] [2022-07-11 23:49:48,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523831093] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:49:48,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:49:48,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:49:48,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874766685] [2022-07-11 23:49:48,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:49:48,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:49:48,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:49:48,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:49:48,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:49:48,053 INFO L87 Difference]: Start difference. First operand 6855 states and 10567 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 23:49:51,794 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:53,817 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:56,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:49:56,248 INFO L93 Difference]: Finished difference Result 10875 states and 17003 transitions. [2022-07-11 23:49:56,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-11 23:49:56,249 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 65 [2022-07-11 23:49:56,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:49:56,268 INFO L225 Difference]: With dead ends: 10875 [2022-07-11 23:49:56,269 INFO L226 Difference]: Without dead ends: 7624 [2022-07-11 23:49:56,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-07-11 23:49:56,278 INFO L413 NwaCegarLoop]: 1119 mSDtfsCounter, 914 mSDsluCounter, 1881 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 401 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 3000 SdHoareTripleChecker+Invalid, 2133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:49:56,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [957 Valid, 3000 Invalid, 2133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 1730 Invalid, 2 Unknown, 0 Unchecked, 7.6s Time] [2022-07-11 23:49:56,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7624 states. [2022-07-11 23:49:56,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7624 to 6723. [2022-07-11 23:49:56,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6723 states, 5693 states have (on average 1.476725803618479) internal successors, (8407), 5908 states have internal predecessors, (8407), 738 states have call successors, (738), 227 states have call predecessors, (738), 291 states have return successors, (1189), 617 states have call predecessors, (1189), 717 states have call successors, (1189) [2022-07-11 23:49:56,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6723 states to 6723 states and 10334 transitions. [2022-07-11 23:49:56,639 INFO L78 Accepts]: Start accepts. Automaton has 6723 states and 10334 transitions. Word has length 65 [2022-07-11 23:49:56,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:49:56,639 INFO L495 AbstractCegarLoop]: Abstraction has 6723 states and 10334 transitions. [2022-07-11 23:49:56,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 23:49:56,639 INFO L276 IsEmpty]: Start isEmpty. Operand 6723 states and 10334 transitions. [2022-07-11 23:49:56,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-11 23:49:56,640 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:49:56,641 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:49:56,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-11 23:49:56,641 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:49:56,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:49:56,641 INFO L85 PathProgramCache]: Analyzing trace with hash -340114262, now seen corresponding path program 1 times [2022-07-11 23:49:56,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:49:56,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718841483] [2022-07-11 23:49:56,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:49:56,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:49:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:56,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:49:56,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:56,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:49:56,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:56,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-11 23:49:56,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:56,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:49:56,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:56,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:49:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:56,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:49:56,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:49:56,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718841483] [2022-07-11 23:49:56,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718841483] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:49:56,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:49:56,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-11 23:49:56,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324137191] [2022-07-11 23:49:56,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:49:56,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:49:56,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:49:56,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:49:56,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:49:56,831 INFO L87 Difference]: Start difference. First operand 6723 states and 10334 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-11 23:50:00,061 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:00,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:50:00,865 INFO L93 Difference]: Finished difference Result 13105 states and 20530 transitions. [2022-07-11 23:50:00,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 23:50:00,865 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 66 [2022-07-11 23:50:00,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:50:00,890 INFO L225 Difference]: With dead ends: 13105 [2022-07-11 23:50:00,890 INFO L226 Difference]: Without dead ends: 7568 [2022-07-11 23:50:00,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-11 23:50:00,907 INFO L413 NwaCegarLoop]: 663 mSDtfsCounter, 439 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 294 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 1822 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:50:00,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 1822 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 814 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2022-07-11 23:50:00,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7568 states. [2022-07-11 23:50:01,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7568 to 6629. [2022-07-11 23:50:01,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6629 states, 5601 states have (on average 1.4767005891805034) internal successors, (8271), 5826 states have internal predecessors, (8271), 744 states have call successors, (744), 227 states have call predecessors, (744), 283 states have return successors, (1184), 605 states have call predecessors, (1184), 723 states have call successors, (1184) [2022-07-11 23:50:01,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6629 states to 6629 states and 10199 transitions. [2022-07-11 23:50:01,307 INFO L78 Accepts]: Start accepts. Automaton has 6629 states and 10199 transitions. Word has length 66 [2022-07-11 23:50:01,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:50:01,307 INFO L495 AbstractCegarLoop]: Abstraction has 6629 states and 10199 transitions. [2022-07-11 23:50:01,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-11 23:50:01,307 INFO L276 IsEmpty]: Start isEmpty. Operand 6629 states and 10199 transitions. [2022-07-11 23:50:01,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-11 23:50:01,309 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:50:01,309 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:50:01,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-11 23:50:01,309 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:50:01,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:50:01,310 INFO L85 PathProgramCache]: Analyzing trace with hash 437037204, now seen corresponding path program 1 times [2022-07-11 23:50:01,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:50:01,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613784985] [2022-07-11 23:50:01,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:50:01,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:50:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:01,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:50:01,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:01,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:50:01,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:01,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-11 23:50:01,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:50:01,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:50:01,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613784985] [2022-07-11 23:50:01,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613784985] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:50:01,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:50:01,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-11 23:50:01,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311620596] [2022-07-11 23:50:01,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:50:01,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-11 23:50:01,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:50:01,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-11 23:50:01,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-11 23:50:01,497 INFO L87 Difference]: Start difference. First operand 6629 states and 10199 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 23:50:06,428 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:07,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:50:07,650 INFO L93 Difference]: Finished difference Result 7477 states and 11670 transitions. [2022-07-11 23:50:07,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-11 23:50:07,651 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 65 [2022-07-11 23:50:07,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:50:07,682 INFO L225 Difference]: With dead ends: 7477 [2022-07-11 23:50:07,682 INFO L226 Difference]: Without dead ends: 7459 [2022-07-11 23:50:07,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-07-11 23:50:07,688 INFO L413 NwaCegarLoop]: 658 mSDtfsCounter, 861 mSDsluCounter, 3120 mSDsCounter, 0 mSdLazyCounter, 2503 mSolverCounterSat, 372 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 3778 SdHoareTripleChecker+Invalid, 2876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 2503 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:50:07,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [885 Valid, 3778 Invalid, 2876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 2503 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2022-07-11 23:50:07,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7459 states. [2022-07-11 23:50:08,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7459 to 6625. [2022-07-11 23:50:08,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6625 states, 5598 states have (on average 1.476777420507324) internal successors, (8267), 5823 states have internal predecessors, (8267), 743 states have call successors, (743), 227 states have call predecessors, (743), 283 states have return successors, (1183), 604 states have call predecessors, (1183), 722 states have call successors, (1183) [2022-07-11 23:50:08,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6625 states to 6625 states and 10193 transitions. [2022-07-11 23:50:08,048 INFO L78 Accepts]: Start accepts. Automaton has 6625 states and 10193 transitions. Word has length 65 [2022-07-11 23:50:08,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:50:08,049 INFO L495 AbstractCegarLoop]: Abstraction has 6625 states and 10193 transitions. [2022-07-11 23:50:08,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 23:50:08,049 INFO L276 IsEmpty]: Start isEmpty. Operand 6625 states and 10193 transitions. [2022-07-11 23:50:08,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-11 23:50:08,050 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:50:08,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:50:08,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-11 23:50:08,051 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:50:08,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:50:08,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1869722635, now seen corresponding path program 1 times [2022-07-11 23:50:08,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:50:08,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047445329] [2022-07-11 23:50:08,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:50:08,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:50:08,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:08,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:50:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:08,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:50:08,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:08,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-11 23:50:08,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:08,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:50:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:08,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:50:08,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:50:08,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047445329] [2022-07-11 23:50:08,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047445329] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:50:08,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:50:08,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:50:08,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76015559] [2022-07-11 23:50:08,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:50:08,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:50:08,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:50:08,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:50:08,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:50:08,210 INFO L87 Difference]: Start difference. First operand 6625 states and 10193 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-11 23:50:12,683 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:13,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:50:13,755 INFO L93 Difference]: Finished difference Result 10441 states and 16350 transitions. [2022-07-11 23:50:13,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-11 23:50:13,756 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-07-11 23:50:13,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:50:13,773 INFO L225 Difference]: With dead ends: 10441 [2022-07-11 23:50:13,773 INFO L226 Difference]: Without dead ends: 7793 [2022-07-11 23:50:13,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-07-11 23:50:13,783 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 909 mSDsluCounter, 1322 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 406 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 931 SdHoareTripleChecker+Valid, 1969 SdHoareTripleChecker+Invalid, 1568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-07-11 23:50:13,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [931 Valid, 1969 Invalid, 1568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 1161 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2022-07-11 23:50:13,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7793 states. [2022-07-11 23:50:14,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7793 to 6847. [2022-07-11 23:50:14,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6847 states, 5810 states have (on average 1.4731497418244406) internal successors, (8559), 6043 states have internal predecessors, (8559), 743 states have call successors, (743), 227 states have call predecessors, (743), 293 states have return successors, (1198), 606 states have call predecessors, (1198), 722 states have call successors, (1198) [2022-07-11 23:50:14,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6847 states to 6847 states and 10500 transitions. [2022-07-11 23:50:14,249 INFO L78 Accepts]: Start accepts. Automaton has 6847 states and 10500 transitions. Word has length 67 [2022-07-11 23:50:14,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:50:14,249 INFO L495 AbstractCegarLoop]: Abstraction has 6847 states and 10500 transitions. [2022-07-11 23:50:14,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-11 23:50:14,249 INFO L276 IsEmpty]: Start isEmpty. Operand 6847 states and 10500 transitions. [2022-07-11 23:50:14,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-11 23:50:14,255 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:50:14,255 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:50:14,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-11 23:50:14,255 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:50:14,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:50:14,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1466440038, now seen corresponding path program 1 times [2022-07-11 23:50:14,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:50:14,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80929658] [2022-07-11 23:50:14,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:50:14,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:50:14,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:14,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:50:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:14,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:50:14,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:14,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 23:50:14,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:14,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-11 23:50:14,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:14,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-11 23:50:14,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:14,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:50:14,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:50:14,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80929658] [2022-07-11 23:50:14,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80929658] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:50:14,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:50:14,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:50:14,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085461388] [2022-07-11 23:50:14,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:50:14,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:50:14,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:50:14,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:50:14,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:50:14,463 INFO L87 Difference]: Start difference. First operand 6847 states and 10500 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-11 23:50:18,098 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 [] [2022-07-11 23:50:20,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:50:20,190 INFO L93 Difference]: Finished difference Result 9490 states and 14566 transitions. [2022-07-11 23:50:20,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-11 23:50:20,190 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2022-07-11 23:50:20,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:50:20,216 INFO L225 Difference]: With dead ends: 9490 [2022-07-11 23:50:20,217 INFO L226 Difference]: Without dead ends: 5437 [2022-07-11 23:50:20,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2022-07-11 23:50:20,230 INFO L413 NwaCegarLoop]: 990 mSDtfsCounter, 2801 mSDsluCounter, 1946 mSDsCounter, 0 mSdLazyCounter, 1932 mSolverCounterSat, 903 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2861 SdHoareTripleChecker+Valid, 2936 SdHoareTripleChecker+Invalid, 2836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 903 IncrementalHoareTripleChecker+Valid, 1932 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:50:20,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2861 Valid, 2936 Invalid, 2836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [903 Valid, 1932 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2022-07-11 23:50:20,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5437 states. [2022-07-11 23:50:20,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5437 to 4456. [2022-07-11 23:50:20,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4456 states, 3785 states have (on average 1.4544253632760897) internal successors, (5505), 3908 states have internal predecessors, (5505), 466 states have call successors, (466), 162 states have call predecessors, (466), 204 states have return successors, (652), 401 states have call predecessors, (652), 449 states have call successors, (652) [2022-07-11 23:50:20,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4456 states to 4456 states and 6623 transitions. [2022-07-11 23:50:20,515 INFO L78 Accepts]: Start accepts. Automaton has 4456 states and 6623 transitions. Word has length 69 [2022-07-11 23:50:20,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:50:20,515 INFO L495 AbstractCegarLoop]: Abstraction has 4456 states and 6623 transitions. [2022-07-11 23:50:20,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-11 23:50:20,515 INFO L276 IsEmpty]: Start isEmpty. Operand 4456 states and 6623 transitions. [2022-07-11 23:50:20,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-11 23:50:20,517 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:50:20,517 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:50:20,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-11 23:50:20,517 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:50:20,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:50:20,518 INFO L85 PathProgramCache]: Analyzing trace with hash -677342089, now seen corresponding path program 1 times [2022-07-11 23:50:20,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:50:20,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060421865] [2022-07-11 23:50:20,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:50:20,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:50:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:20,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:50:20,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:20,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:50:20,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:20,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-11 23:50:20,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:20,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-11 23:50:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:20,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:50:20,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:50:20,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060421865] [2022-07-11 23:50:20,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060421865] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:50:20,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:50:20,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:50:20,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512246542] [2022-07-11 23:50:20,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:50:20,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:50:20,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:50:20,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:50:20,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:50:20,679 INFO L87 Difference]: Start difference. First operand 4456 states and 6623 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-11 23:50:24,258 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:26,296 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:27,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:50:27,377 INFO L93 Difference]: Finished difference Result 7882 states and 11879 transitions. [2022-07-11 23:50:27,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-11 23:50:27,377 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 68 [2022-07-11 23:50:27,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:50:27,387 INFO L225 Difference]: With dead ends: 7882 [2022-07-11 23:50:27,388 INFO L226 Difference]: Without dead ends: 5395 [2022-07-11 23:50:27,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-07-11 23:50:27,393 INFO L413 NwaCegarLoop]: 656 mSDtfsCounter, 793 mSDsluCounter, 1604 mSDsCounter, 0 mSdLazyCounter, 1567 mSolverCounterSat, 187 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 816 SdHoareTripleChecker+Valid, 2260 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1567 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:50:27,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [816 Valid, 2260 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1567 Invalid, 2 Unknown, 0 Unchecked, 6.2s Time] [2022-07-11 23:50:27,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5395 states. [2022-07-11 23:50:27,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5395 to 4432. [2022-07-11 23:50:27,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4432 states, 3761 states have (on average 1.4557298590800318) internal successors, (5475), 3884 states have internal predecessors, (5475), 466 states have call successors, (466), 162 states have call predecessors, (466), 204 states have return successors, (652), 401 states have call predecessors, (652), 449 states have call successors, (652) [2022-07-11 23:50:27,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4432 states to 4432 states and 6593 transitions. [2022-07-11 23:50:27,651 INFO L78 Accepts]: Start accepts. Automaton has 4432 states and 6593 transitions. Word has length 68 [2022-07-11 23:50:27,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:50:27,652 INFO L495 AbstractCegarLoop]: Abstraction has 4432 states and 6593 transitions. [2022-07-11 23:50:27,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-11 23:50:27,652 INFO L276 IsEmpty]: Start isEmpty. Operand 4432 states and 6593 transitions. [2022-07-11 23:50:27,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-11 23:50:27,653 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:50:27,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:50:27,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-11 23:50:27,654 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:50:27,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:50:27,654 INFO L85 PathProgramCache]: Analyzing trace with hash -554272668, now seen corresponding path program 1 times [2022-07-11 23:50:27,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:50:27,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201755914] [2022-07-11 23:50:27,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:50:27,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:50:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:27,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:50:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:27,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:50:27,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:27,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-11 23:50:27,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:27,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-11 23:50:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:27,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-11 23:50:27,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:27,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-11 23:50:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:27,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:50:27,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:50:27,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201755914] [2022-07-11 23:50:27,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201755914] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:50:27,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:50:27,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:50:27,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178813798] [2022-07-11 23:50:27,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:50:27,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:50:27,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:50:27,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:50:27,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:50:27,818 INFO L87 Difference]: Start difference. First operand 4432 states and 6593 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-11 23:50:31,443 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:32,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:50:32,469 INFO L93 Difference]: Finished difference Result 7928 states and 11993 transitions. [2022-07-11 23:50:32,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-11 23:50:32,469 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 71 [2022-07-11 23:50:32,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:50:32,481 INFO L225 Difference]: With dead ends: 7928 [2022-07-11 23:50:32,481 INFO L226 Difference]: Without dead ends: 5377 [2022-07-11 23:50:32,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2022-07-11 23:50:32,486 INFO L413 NwaCegarLoop]: 639 mSDtfsCounter, 1397 mSDsluCounter, 1585 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 611 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1407 SdHoareTripleChecker+Valid, 2224 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 611 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:50:32,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1407 Valid, 2224 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [611 Valid, 1262 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2022-07-11 23:50:32,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5377 states. [2022-07-11 23:50:32,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5377 to 4423. [2022-07-11 23:50:32,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4423 states, 3755 states have (on average 1.4561917443408787) internal successors, (5468), 3877 states have internal predecessors, (5468), 464 states have call successors, (464), 161 states have call predecessors, (464), 203 states have return successors, (638), 399 states have call predecessors, (638), 447 states have call successors, (638) [2022-07-11 23:50:32,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4423 states to 4423 states and 6570 transitions. [2022-07-11 23:50:32,741 INFO L78 Accepts]: Start accepts. Automaton has 4423 states and 6570 transitions. Word has length 71 [2022-07-11 23:50:32,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:50:32,741 INFO L495 AbstractCegarLoop]: Abstraction has 4423 states and 6570 transitions. [2022-07-11 23:50:32,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-11 23:50:32,741 INFO L276 IsEmpty]: Start isEmpty. Operand 4423 states and 6570 transitions. [2022-07-11 23:50:32,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-11 23:50:32,743 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:50:32,743 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:50:32,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-11 23:50:32,743 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:50:32,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:50:32,743 INFO L85 PathProgramCache]: Analyzing trace with hash 827121083, now seen corresponding path program 1 times [2022-07-11 23:50:32,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:50:32,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093901676] [2022-07-11 23:50:32,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:50:32,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:50:32,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:32,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:50:32,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:32,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:50:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:32,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:50:32,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:32,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-11 23:50:32,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:32,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:50:32,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:50:32,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093901676] [2022-07-11 23:50:32,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093901676] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:50:32,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:50:32,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-11 23:50:32,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468733983] [2022-07-11 23:50:32,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:50:32,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 23:50:32,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:50:32,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 23:50:32,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:50:32,970 INFO L87 Difference]: Start difference. First operand 4423 states and 6570 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-11 23:50:36,748 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:37,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:50:37,813 INFO L93 Difference]: Finished difference Result 5300 states and 8024 transitions. [2022-07-11 23:50:37,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-11 23:50:37,813 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 68 [2022-07-11 23:50:37,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:50:37,823 INFO L225 Difference]: With dead ends: 5300 [2022-07-11 23:50:37,823 INFO L226 Difference]: Without dead ends: 5280 [2022-07-11 23:50:37,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-07-11 23:50:37,825 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 947 mSDsluCounter, 2337 mSDsCounter, 0 mSdLazyCounter, 1691 mSolverCounterSat, 467 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 2997 SdHoareTripleChecker+Invalid, 2159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 467 IncrementalHoareTripleChecker+Valid, 1691 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:50:37,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [970 Valid, 2997 Invalid, 2159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [467 Valid, 1691 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2022-07-11 23:50:37,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5280 states. [2022-07-11 23:50:38,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5280 to 4422. [2022-07-11 23:50:38,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4422 states, 3755 states have (on average 1.455925432756325) internal successors, (5467), 3876 states have internal predecessors, (5467), 463 states have call successors, (463), 161 states have call predecessors, (463), 203 states have return successors, (637), 399 states have call predecessors, (637), 446 states have call successors, (637) [2022-07-11 23:50:38,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4422 states to 4422 states and 6567 transitions. [2022-07-11 23:50:38,086 INFO L78 Accepts]: Start accepts. Automaton has 4422 states and 6567 transitions. Word has length 68 [2022-07-11 23:50:38,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:50:38,087 INFO L495 AbstractCegarLoop]: Abstraction has 4422 states and 6567 transitions. [2022-07-11 23:50:38,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-11 23:50:38,087 INFO L276 IsEmpty]: Start isEmpty. Operand 4422 states and 6567 transitions. [2022-07-11 23:50:38,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-11 23:50:38,088 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:50:38,088 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:50:38,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-11 23:50:38,088 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:50:38,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:50:38,089 INFO L85 PathProgramCache]: Analyzing trace with hash 463590116, now seen corresponding path program 1 times [2022-07-11 23:50:38,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:50:38,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599060954] [2022-07-11 23:50:38,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:50:38,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:50:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:38,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:50:38,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:38,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:50:38,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:38,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-11 23:50:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:38,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-11 23:50:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:38,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:50:38,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:50:38,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599060954] [2022-07-11 23:50:38,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599060954] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:50:38,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:50:38,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-11 23:50:38,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472350764] [2022-07-11 23:50:38,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:50:38,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-11 23:50:38,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:50:38,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-11 23:50:38,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-11 23:50:38,334 INFO L87 Difference]: Start difference. First operand 4422 states and 6567 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-11 23:50:42,619 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:43,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:50:43,710 INFO L93 Difference]: Finished difference Result 5362 states and 8158 transitions. [2022-07-11 23:50:43,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-11 23:50:43,710 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-07-11 23:50:43,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:50:43,720 INFO L225 Difference]: With dead ends: 5362 [2022-07-11 23:50:43,720 INFO L226 Difference]: Without dead ends: 5346 [2022-07-11 23:50:43,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-07-11 23:50:43,723 INFO L413 NwaCegarLoop]: 651 mSDtfsCounter, 959 mSDsluCounter, 2754 mSDsCounter, 0 mSdLazyCounter, 2101 mSolverCounterSat, 479 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 3405 SdHoareTripleChecker+Invalid, 2581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 2101 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:50:43,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [983 Valid, 3405 Invalid, 2581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 2101 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2022-07-11 23:50:43,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5346 states. [2022-07-11 23:50:43,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5346 to 4427. [2022-07-11 23:50:43,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4427 states, 3758 states have (on average 1.456093666844066) internal successors, (5472), 3880 states have internal predecessors, (5472), 465 states have call successors, (465), 161 states have call predecessors, (465), 203 states have return successors, (639), 400 states have call predecessors, (639), 448 states have call successors, (639) [2022-07-11 23:50:43,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4427 states to 4427 states and 6576 transitions. [2022-07-11 23:50:43,984 INFO L78 Accepts]: Start accepts. Automaton has 4427 states and 6576 transitions. Word has length 69 [2022-07-11 23:50:43,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:50:43,985 INFO L495 AbstractCegarLoop]: Abstraction has 4427 states and 6576 transitions. [2022-07-11 23:50:43,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-11 23:50:43,985 INFO L276 IsEmpty]: Start isEmpty. Operand 4427 states and 6576 transitions. [2022-07-11 23:50:44,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-11 23:50:44,003 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:50:44,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:50:44,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-11 23:50:44,004 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:50:44,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:50:44,004 INFO L85 PathProgramCache]: Analyzing trace with hash -669900528, now seen corresponding path program 1 times [2022-07-11 23:50:44,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:50:44,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278929689] [2022-07-11 23:50:44,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:50:44,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:50:44,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:44,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:50:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:44,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:50:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:44,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-11 23:50:44,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:44,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-11 23:50:44,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:50:44,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:50:44,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278929689] [2022-07-11 23:50:44,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278929689] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:50:44,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:50:44,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-11 23:50:44,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695591849] [2022-07-11 23:50:44,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:50:44,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-11 23:50:44,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:50:44,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-11 23:50:44,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-11 23:50:44,228 INFO L87 Difference]: Start difference. First operand 4427 states and 6576 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-11 23:50:48,744 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:50,775 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:51,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:50:51,712 INFO L93 Difference]: Finished difference Result 9525 states and 14480 transitions. [2022-07-11 23:50:51,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:50:51,713 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 69 [2022-07-11 23:50:51,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:50:51,724 INFO L225 Difference]: With dead ends: 9525 [2022-07-11 23:50:51,724 INFO L226 Difference]: Without dead ends: 5473 [2022-07-11 23:50:51,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-07-11 23:50:51,733 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 382 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 1363 mSolverCounterSat, 120 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 2613 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1363 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:50:51,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 2613 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1363 Invalid, 2 Unknown, 0 Unchecked, 7.0s Time] [2022-07-11 23:50:51,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5473 states. [2022-07-11 23:50:51,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5473 to 4455. [2022-07-11 23:50:51,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4455 states, 3786 states have (on average 1.4527205493924986) internal successors, (5500), 3908 states have internal predecessors, (5500), 465 states have call successors, (465), 161 states have call predecessors, (465), 203 states have return successors, (639), 400 states have call predecessors, (639), 448 states have call successors, (639) [2022-07-11 23:50:52,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4455 states to 4455 states and 6604 transitions. [2022-07-11 23:50:52,003 INFO L78 Accepts]: Start accepts. Automaton has 4455 states and 6604 transitions. Word has length 69 [2022-07-11 23:50:52,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:50:52,003 INFO L495 AbstractCegarLoop]: Abstraction has 4455 states and 6604 transitions. [2022-07-11 23:50:52,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-11 23:50:52,004 INFO L276 IsEmpty]: Start isEmpty. Operand 4455 states and 6604 transitions. [2022-07-11 23:50:52,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-11 23:50:52,005 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:50:52,005 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:50:52,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-11 23:50:52,005 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:50:52,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:50:52,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1685614928, now seen corresponding path program 1 times [2022-07-11 23:50:52,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:50:52,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733303009] [2022-07-11 23:50:52,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:50:52,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:50:52,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:52,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:50:52,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:52,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:50:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:52,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-11 23:50:52,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:52,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-11 23:50:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:52,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:50:52,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:50:52,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733303009] [2022-07-11 23:50:52,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733303009] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:50:52,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:50:52,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-11 23:50:52,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973904938] [2022-07-11 23:50:52,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:50:52,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-11 23:50:52,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:50:52,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-11 23:50:52,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-07-11 23:50:52,275 INFO L87 Difference]: Start difference. First operand 4455 states and 6604 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-11 23:50:56,365 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:50:57,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:50:57,313 INFO L93 Difference]: Finished difference Result 9445 states and 14286 transitions. [2022-07-11 23:50:57,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-11 23:50:57,313 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 69 [2022-07-11 23:50:57,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:50:57,324 INFO L225 Difference]: With dead ends: 9445 [2022-07-11 23:50:57,324 INFO L226 Difference]: Without dead ends: 5384 [2022-07-11 23:50:57,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-07-11 23:50:57,332 INFO L413 NwaCegarLoop]: 640 mSDtfsCounter, 539 mSDsluCounter, 2601 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 402 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 3241 SdHoareTripleChecker+Invalid, 1991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 1588 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:50:57,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 3241 Invalid, 1991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 1588 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2022-07-11 23:50:57,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5384 states. [2022-07-11 23:50:57,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5384 to 4434. [2022-07-11 23:50:57,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4434 states, 3772 states have (on average 1.4544008483563096) internal successors, (5486), 3894 states have internal predecessors, (5486), 465 states have call successors, (465), 161 states have call predecessors, (465), 196 states have return successors, (594), 393 states have call predecessors, (594), 448 states have call successors, (594) [2022-07-11 23:50:57,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4434 states to 4434 states and 6545 transitions. [2022-07-11 23:50:57,650 INFO L78 Accepts]: Start accepts. Automaton has 4434 states and 6545 transitions. Word has length 69 [2022-07-11 23:50:57,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:50:57,651 INFO L495 AbstractCegarLoop]: Abstraction has 4434 states and 6545 transitions. [2022-07-11 23:50:57,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-11 23:50:57,651 INFO L276 IsEmpty]: Start isEmpty. Operand 4434 states and 6545 transitions. [2022-07-11 23:50:57,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-11 23:50:57,652 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:50:57,652 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:50:57,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-11 23:50:57,653 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:50:57,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:50:57,653 INFO L85 PathProgramCache]: Analyzing trace with hash 277949588, now seen corresponding path program 1 times [2022-07-11 23:50:57,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:50:57,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176810550] [2022-07-11 23:50:57,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:50:57,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:50:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:57,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:50:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:57,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:50:57,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:57,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-11 23:50:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:57,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-11 23:50:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:57,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-11 23:50:57,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:50:57,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:50:57,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:50:57,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176810550] [2022-07-11 23:50:57,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176810550] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:50:57,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:50:57,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-11 23:50:57,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965900785] [2022-07-11 23:50:57,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:50:57,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-11 23:50:57,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:50:57,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-11 23:50:57,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-11 23:50:57,859 INFO L87 Difference]: Start difference. First operand 4434 states and 6545 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-11 23:51:03,326 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:51:05,352 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:51:06,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:51:06,683 INFO L93 Difference]: Finished difference Result 8059 states and 12189 transitions. [2022-07-11 23:51:06,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-11 23:51:06,684 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2022-07-11 23:51:06,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:51:06,692 INFO L225 Difference]: With dead ends: 8059 [2022-07-11 23:51:06,692 INFO L226 Difference]: Without dead ends: 5579 [2022-07-11 23:51:06,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-07-11 23:51:06,710 INFO L413 NwaCegarLoop]: 652 mSDtfsCounter, 871 mSDsluCounter, 2559 mSDsCounter, 0 mSdLazyCounter, 2169 mSolverCounterSat, 380 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 3211 SdHoareTripleChecker+Invalid, 2551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 2169 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:51:06,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [894 Valid, 3211 Invalid, 2551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 2169 Invalid, 2 Unknown, 0 Unchecked, 8.2s Time] [2022-07-11 23:51:06,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5579 states. [2022-07-11 23:51:06,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5579 to 4492. [2022-07-11 23:51:06,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4492 states, 3816 states have (on average 1.44916142557652) internal successors, (5530), 3940 states have internal predecessors, (5530), 465 states have call successors, (465), 161 states have call predecessors, (465), 210 states have return successors, (639), 405 states have call predecessors, (639), 448 states have call successors, (639) [2022-07-11 23:51:06,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4492 states to 4492 states and 6634 transitions. [2022-07-11 23:51:06,994 INFO L78 Accepts]: Start accepts. Automaton has 4492 states and 6634 transitions. Word has length 71 [2022-07-11 23:51:06,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:51:06,994 INFO L495 AbstractCegarLoop]: Abstraction has 4492 states and 6634 transitions. [2022-07-11 23:51:06,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-11 23:51:06,995 INFO L276 IsEmpty]: Start isEmpty. Operand 4492 states and 6634 transitions. [2022-07-11 23:51:07,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-11 23:51:07,012 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:51:07,012 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:51:07,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-11 23:51:07,012 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:51:07,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:51:07,013 INFO L85 PathProgramCache]: Analyzing trace with hash 302497870, now seen corresponding path program 1 times [2022-07-11 23:51:07,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:51:07,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103823866] [2022-07-11 23:51:07,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:51:07,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:51:07,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:51:07,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:51:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:51:07,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:51:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:51:07,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-11 23:51:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:51:07,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-11 23:51:07,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:51:07,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:51:07,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:51:07,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103823866] [2022-07-11 23:51:07,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103823866] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:51:07,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:51:07,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-11 23:51:07,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088615112] [2022-07-11 23:51:07,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:51:07,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 23:51:07,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:51:07,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 23:51:07,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:51:07,285 INFO L87 Difference]: Start difference. First operand 4492 states and 6634 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-11 23:51:11,107 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:51:12,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:51:12,013 INFO L93 Difference]: Finished difference Result 9698 states and 14628 transitions. [2022-07-11 23:51:12,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-11 23:51:12,013 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 70 [2022-07-11 23:51:12,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:51:12,023 INFO L225 Difference]: With dead ends: 9698 [2022-07-11 23:51:12,023 INFO L226 Difference]: Without dead ends: 5600 [2022-07-11 23:51:12,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-07-11 23:51:12,030 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 486 mSDsluCounter, 2098 mSDsCounter, 0 mSdLazyCounter, 1331 mSolverCounterSat, 320 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 2734 SdHoareTripleChecker+Invalid, 1652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 1331 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:51:12,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 2734 Invalid, 1652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 1331 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2022-07-11 23:51:12,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5600 states. [2022-07-11 23:51:12,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5600 to 4504. [2022-07-11 23:51:12,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4504 states, 3828 states have (on average 1.4477533960292581) internal successors, (5542), 3940 states have internal predecessors, (5542), 465 states have call successors, (465), 161 states have call predecessors, (465), 210 states have return successors, (639), 417 states have call predecessors, (639), 448 states have call successors, (639) [2022-07-11 23:51:12,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4504 states to 4504 states and 6646 transitions. [2022-07-11 23:51:12,314 INFO L78 Accepts]: Start accepts. Automaton has 4504 states and 6646 transitions. Word has length 70 [2022-07-11 23:51:12,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:51:12,314 INFO L495 AbstractCegarLoop]: Abstraction has 4504 states and 6646 transitions. [2022-07-11 23:51:12,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-11 23:51:12,315 INFO L276 IsEmpty]: Start isEmpty. Operand 4504 states and 6646 transitions. [2022-07-11 23:51:12,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-11 23:51:12,316 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:51:12,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:51:12,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-11 23:51:12,316 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:51:12,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:51:12,317 INFO L85 PathProgramCache]: Analyzing trace with hash 965591191, now seen corresponding path program 1 times [2022-07-11 23:51:12,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:51:12,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230722672] [2022-07-11 23:51:12,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:51:12,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:51:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:51:12,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:51:12,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:51:12,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:51:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:51:12,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-11 23:51:12,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:51:12,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:51:12,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:51:12,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230722672] [2022-07-11 23:51:12,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230722672] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:51:12,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:51:12,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-11 23:51:12,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089041392] [2022-07-11 23:51:12,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:51:12,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-11 23:51:12,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:51:12,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-11 23:51:12,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-11 23:51:12,495 INFO L87 Difference]: Start difference. First operand 4504 states and 6646 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 23:51:16,924 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:51:18,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:51:18,237 INFO L93 Difference]: Finished difference Result 5384 states and 8102 transitions. [2022-07-11 23:51:18,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-11 23:51:18,237 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 69 [2022-07-11 23:51:18,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:51:18,247 INFO L225 Difference]: With dead ends: 5384 [2022-07-11 23:51:18,248 INFO L226 Difference]: Without dead ends: 5362 [2022-07-11 23:51:18,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-07-11 23:51:18,252 INFO L413 NwaCegarLoop]: 655 mSDtfsCounter, 871 mSDsluCounter, 3533 mSDsCounter, 0 mSdLazyCounter, 2836 mSolverCounterSat, 359 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 4188 SdHoareTripleChecker+Invalid, 3196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 2836 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:51:18,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [895 Valid, 4188 Invalid, 3196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 2836 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2022-07-11 23:51:18,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5362 states. [2022-07-11 23:51:18,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5362 to 4499. [2022-07-11 23:51:18,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4499 states, 3824 states have (on average 1.4479602510460252) internal successors, (5537), 3936 states have internal predecessors, (5537), 464 states have call successors, (464), 161 states have call predecessors, (464), 210 states have return successors, (638), 416 states have call predecessors, (638), 447 states have call successors, (638) [2022-07-11 23:51:18,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4499 states to 4499 states and 6639 transitions. [2022-07-11 23:51:18,563 INFO L78 Accepts]: Start accepts. Automaton has 4499 states and 6639 transitions. Word has length 69 [2022-07-11 23:51:18,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:51:18,563 INFO L495 AbstractCegarLoop]: Abstraction has 4499 states and 6639 transitions. [2022-07-11 23:51:18,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 23:51:18,563 INFO L276 IsEmpty]: Start isEmpty. Operand 4499 states and 6639 transitions. [2022-07-11 23:51:18,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-11 23:51:18,564 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:51:18,565 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:51:18,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-11 23:51:18,565 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:51:18,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:51:18,565 INFO L85 PathProgramCache]: Analyzing trace with hash 2005419428, now seen corresponding path program 1 times [2022-07-11 23:51:18,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:51:18,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827347079] [2022-07-11 23:51:18,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:51:18,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:51:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:51:18,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:51:18,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:51:18,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:51:18,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:51:18,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-11 23:51:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:51:18,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-11 23:51:18,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:51:18,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-11 23:51:18,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:51:18,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:51:18,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:51:18,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827347079] [2022-07-11 23:51:18,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827347079] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:51:18,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:51:18,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:51:18,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979100006] [2022-07-11 23:51:18,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:51:18,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:51:18,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:51:18,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:51:18,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:51:18,825 INFO L87 Difference]: Start difference. First operand 4499 states and 6639 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-11 23:51:22,541 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:51:24,568 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:51:25,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:51:25,934 INFO L93 Difference]: Finished difference Result 9671 states and 14461 transitions. [2022-07-11 23:51:25,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-11 23:51:25,935 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2022-07-11 23:51:25,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:51:25,944 INFO L225 Difference]: With dead ends: 9671 [2022-07-11 23:51:25,944 INFO L226 Difference]: Without dead ends: 5575 [2022-07-11 23:51:25,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-07-11 23:51:25,951 INFO L413 NwaCegarLoop]: 642 mSDtfsCounter, 917 mSDsluCounter, 1553 mSDsCounter, 0 mSdLazyCounter, 1447 mSolverCounterSat, 215 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 2195 SdHoareTripleChecker+Invalid, 1664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 1447 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:51:25,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [939 Valid, 2195 Invalid, 1664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1447 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2022-07-11 23:51:25,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5575 states. [2022-07-11 23:51:26,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5575 to 4515. [2022-07-11 23:51:26,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4515 states, 3840 states have (on average 1.44609375) internal successors, (5553), 3952 states have internal predecessors, (5553), 464 states have call successors, (464), 161 states have call predecessors, (464), 210 states have return successors, (638), 416 states have call predecessors, (638), 447 states have call successors, (638) [2022-07-11 23:51:26,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4515 states to 4515 states and 6655 transitions. [2022-07-11 23:51:26,296 INFO L78 Accepts]: Start accepts. Automaton has 4515 states and 6655 transitions. Word has length 71 [2022-07-11 23:51:26,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:51:26,297 INFO L495 AbstractCegarLoop]: Abstraction has 4515 states and 6655 transitions. [2022-07-11 23:51:26,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-11 23:51:26,297 INFO L276 IsEmpty]: Start isEmpty. Operand 4515 states and 6655 transitions. [2022-07-11 23:51:26,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-11 23:51:26,298 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:51:26,298 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:51:26,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-11 23:51:26,299 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:51:26,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:51:26,299 INFO L85 PathProgramCache]: Analyzing trace with hash 885604175, now seen corresponding path program 1 times [2022-07-11 23:51:26,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:51:26,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586653960] [2022-07-11 23:51:26,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:51:26,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:51:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:51:26,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:51:26,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:51:26,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:51:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:51:26,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-11 23:51:26,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:51:26,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:51:26,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:51:26,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586653960] [2022-07-11 23:51:26,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586653960] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:51:26,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:51:26,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-11 23:51:26,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875095690] [2022-07-11 23:51:26,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:51:26,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-11 23:51:26,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:51:26,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-11 23:51:26,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-11 23:51:26,505 INFO L87 Difference]: Start difference. First operand 4515 states and 6655 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 23:51:31,190 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:51:32,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:51:32,417 INFO L93 Difference]: Finished difference Result 5407 states and 8123 transitions. [2022-07-11 23:51:32,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-11 23:51:32,417 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 69 [2022-07-11 23:51:32,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:51:32,426 INFO L225 Difference]: With dead ends: 5407 [2022-07-11 23:51:32,427 INFO L226 Difference]: Without dead ends: 5386 [2022-07-11 23:51:32,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-07-11 23:51:32,429 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 871 mSDsluCounter, 3479 mSDsCounter, 0 mSdLazyCounter, 2822 mSolverCounterSat, 357 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 4126 SdHoareTripleChecker+Invalid, 3180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 2822 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:51:32,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [895 Valid, 4126 Invalid, 3180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 2822 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2022-07-11 23:51:32,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5386 states. [2022-07-11 23:51:32,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5386 to 4511. [2022-07-11 23:51:32,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4511 states, 3837 states have (on average 1.4461819129528277) internal successors, (5549), 3949 states have internal predecessors, (5549), 463 states have call successors, (463), 161 states have call predecessors, (463), 210 states have return successors, (637), 415 states have call predecessors, (637), 446 states have call successors, (637) [2022-07-11 23:51:32,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4511 states to 4511 states and 6649 transitions. [2022-07-11 23:51:32,750 INFO L78 Accepts]: Start accepts. Automaton has 4511 states and 6649 transitions. Word has length 69 [2022-07-11 23:51:32,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:51:32,750 INFO L495 AbstractCegarLoop]: Abstraction has 4511 states and 6649 transitions. [2022-07-11 23:51:32,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 23:51:32,750 INFO L276 IsEmpty]: Start isEmpty. Operand 4511 states and 6649 transitions. [2022-07-11 23:51:32,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-11 23:51:32,751 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:51:32,751 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:51:32,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-11 23:51:32,752 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:51:32,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:51:32,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1081372361, now seen corresponding path program 1 times [2022-07-11 23:51:32,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:51:32,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356633438] [2022-07-11 23:51:32,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:51:32,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:51:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:51:32,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:51:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:51:32,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:51:32,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:51:32,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-11 23:51:32,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:51:32,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-11 23:51:32,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:51:32,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:51:32,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:51:32,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356633438] [2022-07-11 23:51:32,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356633438] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:51:32,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:51:32,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:51:32,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326832130] [2022-07-11 23:51:32,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:51:32,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:51:32,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:51:32,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:51:32,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:51:32,935 INFO L87 Difference]: Start difference. First operand 4511 states and 6649 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-11 23:51:36,224 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:51:37,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:51:37,260 INFO L93 Difference]: Finished difference Result 8174 states and 12226 transitions. [2022-07-11 23:51:37,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-11 23:51:37,260 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 71 [2022-07-11 23:51:37,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:51:37,271 INFO L225 Difference]: With dead ends: 8174 [2022-07-11 23:51:37,272 INFO L226 Difference]: Without dead ends: 5647 [2022-07-11 23:51:37,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-07-11 23:51:37,277 INFO L413 NwaCegarLoop]: 627 mSDtfsCounter, 913 mSDsluCounter, 1365 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 386 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 1992 SdHoareTripleChecker+Invalid, 1566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:51:37,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [936 Valid, 1992 Invalid, 1566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 1179 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2022-07-11 23:51:37,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5647 states. [2022-07-11 23:51:37,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5647 to 4571. [2022-07-11 23:51:37,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4571 states, 3897 states have (on average 1.4393122915062868) internal successors, (5609), 4009 states have internal predecessors, (5609), 463 states have call successors, (463), 161 states have call predecessors, (463), 210 states have return successors, (637), 415 states have call predecessors, (637), 446 states have call successors, (637) [2022-07-11 23:51:37,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4571 states to 4571 states and 6709 transitions. [2022-07-11 23:51:37,604 INFO L78 Accepts]: Start accepts. Automaton has 4571 states and 6709 transitions. Word has length 71 [2022-07-11 23:51:37,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:51:37,605 INFO L495 AbstractCegarLoop]: Abstraction has 4571 states and 6709 transitions. [2022-07-11 23:51:37,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-11 23:51:37,605 INFO L276 IsEmpty]: Start isEmpty. Operand 4571 states and 6709 transitions. [2022-07-11 23:51:37,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-11 23:51:37,606 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:51:37,606 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:51:37,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-11 23:51:37,606 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:51:37,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:51:37,607 INFO L85 PathProgramCache]: Analyzing trace with hash -100745951, now seen corresponding path program 1 times [2022-07-11 23:51:37,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:51:37,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631659414] [2022-07-11 23:51:37,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:51:37,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:51:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:51:37,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:51:37,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:51:37,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-11 23:51:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:51:37,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-11 23:51:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:51:37,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:51:37,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:51:37,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631659414] [2022-07-11 23:51:37,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631659414] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:51:37,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:51:37,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-11 23:51:37,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315023328] [2022-07-11 23:51:37,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:51:37,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-11 23:51:37,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:51:37,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-11 23:51:37,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-11 23:51:37,788 INFO L87 Difference]: Start difference. First operand 4571 states and 6709 transitions. Second operand has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 7 states have internal predecessors, (63), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 23:51:42,166 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:51:43,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:51:43,536 INFO L93 Difference]: Finished difference Result 5463 states and 8177 transitions. [2022-07-11 23:51:43,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-11 23:51:43,537 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 7 states have internal predecessors, (63), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 70 [2022-07-11 23:51:43,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:51:43,548 INFO L225 Difference]: With dead ends: 5463 [2022-07-11 23:51:43,548 INFO L226 Difference]: Without dead ends: 5442 [2022-07-11 23:51:43,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-07-11 23:51:43,551 INFO L413 NwaCegarLoop]: 639 mSDtfsCounter, 872 mSDsluCounter, 3433 mSDsCounter, 0 mSdLazyCounter, 2804 mSolverCounterSat, 357 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 4072 SdHoareTripleChecker+Invalid, 3162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 2804 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:51:43,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [896 Valid, 4072 Invalid, 3162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 2804 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2022-07-11 23:51:43,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5442 states.