./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ntdrivers/diskperf.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae 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/diskperf.i.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f0996d70f204c5713a65b04e25037e48d7532ec1ba0c10162e12c5c0d518b4e3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 00:46:36,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 00:46:36,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 00:46:36,223 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 00:46:36,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 00:46:36,226 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 00:46:36,227 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 00:46:36,229 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 00:46:36,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 00:46:36,235 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 00:46:36,236 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 00:46:36,237 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 00:46:36,237 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 00:46:36,239 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 00:46:36,240 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 00:46:36,241 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 00:46:36,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 00:46:36,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 00:46:36,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 00:46:36,247 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 00:46:36,247 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 00:46:36,248 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 00:46:36,249 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 00:46:36,249 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 00:46:36,255 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 00:46:36,255 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 00:46:36,255 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 00:46:36,256 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 00:46:36,257 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 00:46:36,257 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 00:46:36,257 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 00:46:36,258 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 00:46:36,259 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 00:46:36,260 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 00:46:36,261 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 00:46:36,261 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 00:46:36,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 00:46:36,262 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 00:46:36,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 00:46:36,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 00:46:36,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 00:46:36,265 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 00:46:36,287 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 00:46:36,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 00:46:36,288 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 00:46:36,288 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 00:46:36,288 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 00:46:36,289 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 00:46:36,289 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 00:46:36,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 00:46:36,289 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 00:46:36,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 00:46:36,290 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 00:46:36,290 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 00:46:36,290 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 00:46:36,291 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 00:46:36,291 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 00:46:36,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 00:46:36,291 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 00:46:36,291 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 00:46:36,291 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 00:46:36,291 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 00:46:36,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 00:46:36,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 00:46:36,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 00:46:36,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 00:46:36,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 00:46:36,292 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 00:46:36,292 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 00:46:36,293 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 00:46:36,293 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 00:46:36,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 00:46:36,293 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 00:46:36,293 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 00:46:36,293 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 00:46:36,294 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 00:46:36,294 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 00:46:36,294 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0996d70f204c5713a65b04e25037e48d7532ec1ba0c10162e12c5c0d518b4e3 [2023-02-16 00:46:36,476 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 00:46:36,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 00:46:36,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 00:46:36,493 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 00:46:36,496 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 00:46:36,497 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/diskperf.i.cil-1.c [2023-02-16 00:46:37,378 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 00:46:37,704 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 00:46:37,705 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/diskperf.i.cil-1.c [2023-02-16 00:46:37,728 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d66fa64af/80f8113f2e7e44e3a2eb852763298812/FLAG3d427c25f [2023-02-16 00:46:37,742 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d66fa64af/80f8113f2e7e44e3a2eb852763298812 [2023-02-16 00:46:37,754 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 00:46:37,755 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 00:46:37,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 00:46:37,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 00:46:37,758 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 00:46:37,759 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 12:46:37" (1/1) ... [2023-02-16 00:46:37,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a81724f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:46:37, skipping insertion in model container [2023-02-16 00:46:37,759 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 12:46:37" (1/1) ... [2023-02-16 00:46:37,764 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 00:46:37,827 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 00:46:38,222 WARN L237 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/diskperf.i.cil-1.c[84645,84658] [2023-02-16 00:46:38,340 WARN L623 FunctionHandler]: Unknown extern function swprintf [2023-02-16 00:46:38,410 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 00:46:38,444 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 00:46:38,477 WARN L237 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/diskperf.i.cil-1.c[84645,84658] [2023-02-16 00:46:38,512 WARN L623 FunctionHandler]: Unknown extern function swprintf [2023-02-16 00:46:38,599 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 00:46:38,643 INFO L208 MainTranslator]: Completed translation [2023-02-16 00:46:38,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:46:38 WrapperNode [2023-02-16 00:46:38,643 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 00:46:38,644 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 00:46:38,644 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 00:46:38,645 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 00:46:38,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:46:38" (1/1) ... [2023-02-16 00:46:38,707 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:46:38" (1/1) ... [2023-02-16 00:46:38,781 INFO L138 Inliner]: procedures = 127, calls = 1459, calls flagged for inlining = 20, calls inlined = 18, statements flattened = 3749 [2023-02-16 00:46:38,781 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 00:46:38,782 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 00:46:38,782 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 00:46:38,782 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 00:46:38,788 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:46:38" (1/1) ... [2023-02-16 00:46:38,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:46:38" (1/1) ... [2023-02-16 00:46:38,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:46:38" (1/1) ... [2023-02-16 00:46:38,816 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:46:38" (1/1) ... [2023-02-16 00:46:38,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:46:38" (1/1) ... [2023-02-16 00:46:38,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:46:38" (1/1) ... [2023-02-16 00:46:38,961 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:46:38" (1/1) ... [2023-02-16 00:46:38,973 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:46:38" (1/1) ... [2023-02-16 00:46:39,000 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 00:46:39,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 00:46:39,001 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 00:46:39,001 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 00:46:39,002 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:46:38" (1/1) ... [2023-02-16 00:46:39,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 00:46:39,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:46:39,031 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) [2023-02-16 00:46:39,048 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 [2023-02-16 00:46:39,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-02-16 00:46:39,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-02-16 00:46:39,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-02-16 00:46:39,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-16 00:46:39,059 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2023-02-16 00:46:39,059 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2023-02-16 00:46:39,059 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfSendToNextDriver [2023-02-16 00:46:39,059 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfSendToNextDriver [2023-02-16 00:46:39,059 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2023-02-16 00:46:39,059 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2023-02-16 00:46:39,059 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfAddCounters [2023-02-16 00:46:39,059 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfAddCounters [2023-02-16 00:46:39,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-02-16 00:46:39,060 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-02-16 00:46:39,060 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedDecrement [2023-02-16 00:46:39,060 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedDecrement [2023-02-16 00:46:39,060 INFO L130 BoogieDeclarations]: Found specification of procedure IoWMIRegistrationControl [2023-02-16 00:46:39,060 INFO L138 BoogieDeclarations]: Found implementation of procedure IoWMIRegistrationControl [2023-02-16 00:46:39,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-16 00:46:39,060 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2023-02-16 00:46:39,060 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2023-02-16 00:46:39,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-02-16 00:46:39,061 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-02-16 00:46:39,061 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2023-02-16 00:46:39,061 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2023-02-16 00:46:39,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-16 00:46:39,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 00:46:39,061 INFO L130 BoogieDeclarations]: Found specification of procedure KeQuerySystemTime [2023-02-16 00:46:39,061 INFO L138 BoogieDeclarations]: Found implementation of procedure KeQuerySystemTime [2023-02-16 00:46:39,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-16 00:46:39,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-16 00:46:39,062 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2023-02-16 00:46:39,063 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2023-02-16 00:46:39,063 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-16 00:46:39,063 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfIrpCompletion [2023-02-16 00:46:39,063 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfIrpCompletion [2023-02-16 00:46:39,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-16 00:46:39,063 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfLogError [2023-02-16 00:46:39,063 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfLogError [2023-02-16 00:46:39,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-16 00:46:39,064 INFO L130 BoogieDeclarations]: Found specification of procedure KeQueryPerformanceCounter [2023-02-16 00:46:39,064 INFO L138 BoogieDeclarations]: Found implementation of procedure KeQueryPerformanceCounter [2023-02-16 00:46:39,064 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedIncrement [2023-02-16 00:46:39,064 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedIncrement [2023-02-16 00:46:39,064 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2023-02-16 00:46:39,065 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2023-02-16 00:46:39,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2023-02-16 00:46:39,065 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2023-02-16 00:46:39,065 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfForwardIrpSynchronous [2023-02-16 00:46:39,065 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfForwardIrpSynchronous [2023-02-16 00:46:39,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 00:46:39,066 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfIoCompletion [2023-02-16 00:46:39,066 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfIoCompletion [2023-02-16 00:46:39,066 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_guard [2023-02-16 00:46:39,066 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_guard [2023-02-16 00:46:39,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-02-16 00:46:39,067 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2023-02-16 00:46:39,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2023-02-16 00:46:39,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 00:46:39,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 00:46:39,595 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 00:46:39,597 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 00:46:39,726 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-16 00:46:39,738 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2023-02-16 00:46:39,739 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2023-02-16 00:46:39,787 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-16 00:46:39,796 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-02-16 00:46:39,796 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-02-16 00:46:40,040 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-16 00:46:40,060 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2023-02-16 00:46:40,061 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2023-02-16 00:46:40,171 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-16 00:46:40,175 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-16 00:46:40,182 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-16 00:47:15,453 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##61: assume false; [2023-02-16 00:47:15,453 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##62: assume !false; [2023-02-16 00:47:15,453 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##129: assume !false; [2023-02-16 00:47:15,453 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##128: assume false; [2023-02-16 00:47:15,453 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##35: assume !false; [2023-02-16 00:47:15,453 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##34: assume false; [2023-02-16 00:47:15,467 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 00:47:15,479 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 00:47:15,479 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-16 00:47:15,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 12:47:15 BoogieIcfgContainer [2023-02-16 00:47:15,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 00:47:15,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 00:47:15,484 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 00:47:15,486 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 00:47:15,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 12:46:37" (1/3) ... [2023-02-16 00:47:15,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b3193e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 12:47:15, skipping insertion in model container [2023-02-16 00:47:15,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:46:38" (2/3) ... [2023-02-16 00:47:15,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b3193e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 12:47:15, skipping insertion in model container [2023-02-16 00:47:15,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 12:47:15" (3/3) ... [2023-02-16 00:47:15,490 INFO L112 eAbstractionObserver]: Analyzing ICFG diskperf.i.cil-1.c [2023-02-16 00:47:15,501 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 00:47:15,501 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 00:47:15,549 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 00:47:15,553 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@167fa9d5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 00:47:15,553 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 00:47:15,558 INFO L276 IsEmpty]: Start isEmpty. Operand has 378 states, 274 states have (on average 1.4197080291970803) internal successors, (389), 292 states have internal predecessors, (389), 80 states have call successors, (80), 22 states have call predecessors, (80), 22 states have return successors, (80), 76 states have call predecessors, (80), 80 states have call successors, (80) [2023-02-16 00:47:15,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-16 00:47:15,562 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:47:15,563 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:47:15,563 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:47:15,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:47:15,566 INFO L85 PathProgramCache]: Analyzing trace with hash 2013573229, now seen corresponding path program 1 times [2023-02-16 00:47:15,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:47:15,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659824984] [2023-02-16 00:47:15,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:47:15,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:47:16,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:47:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:47:16,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:47:16,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659824984] [2023-02-16 00:47:16,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659824984] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:47:16,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:47:16,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 00:47:16,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327182286] [2023-02-16 00:47:16,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:47:16,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 00:47:16,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:47:16,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 00:47:16,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 00:47:16,664 INFO L87 Difference]: Start difference. First operand has 378 states, 274 states have (on average 1.4197080291970803) internal successors, (389), 292 states have internal predecessors, (389), 80 states have call successors, (80), 22 states have call predecessors, (80), 22 states have return successors, (80), 76 states have call predecessors, (80), 80 states have call successors, (80) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:47:16,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:47:16,730 INFO L93 Difference]: Finished difference Result 750 states and 1130 transitions. [2023-02-16 00:47:16,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 00:47:16,731 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-16 00:47:16,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:47:16,739 INFO L225 Difference]: With dead ends: 750 [2023-02-16 00:47:16,741 INFO L226 Difference]: Without dead ends: 371 [2023-02-16 00:47:16,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 00:47:16,750 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 00:47:16,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 00:47:16,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2023-02-16 00:47:16,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2023-02-16 00:47:16,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 269 states have (on average 1.3605947955390334) internal successors, (366), 285 states have internal predecessors, (366), 80 states have call successors, (80), 22 states have call predecessors, (80), 21 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-02-16 00:47:16,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 512 transitions. [2023-02-16 00:47:16,816 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 512 transitions. Word has length 17 [2023-02-16 00:47:16,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:47:16,817 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 512 transitions. [2023-02-16 00:47:16,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:47:16,817 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 512 transitions. [2023-02-16 00:47:16,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-16 00:47:16,818 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:47:16,818 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:47:16,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 00:47:16,818 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:47:16,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:47:16,819 INFO L85 PathProgramCache]: Analyzing trace with hash -6791183, now seen corresponding path program 1 times [2023-02-16 00:47:16,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:47:16,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442076969] [2023-02-16 00:47:16,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:47:16,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:47:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:47:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:47:18,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:47:18,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442076969] [2023-02-16 00:47:18,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442076969] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:47:18,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:47:18,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 00:47:18,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051836247] [2023-02-16 00:47:18,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:47:18,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 00:47:18,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:47:18,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 00:47:18,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 00:47:18,231 INFO L87 Difference]: Start difference. First operand 371 states and 512 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:47:18,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:47:18,339 INFO L93 Difference]: Finished difference Result 744 states and 1027 transitions. [2023-02-16 00:47:18,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 00:47:18,339 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-16 00:47:18,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:47:18,343 INFO L225 Difference]: With dead ends: 744 [2023-02-16 00:47:18,343 INFO L226 Difference]: Without dead ends: 377 [2023-02-16 00:47:18,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 00:47:18,349 INFO L413 NwaCegarLoop]: 508 mSDtfsCounter, 2 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 00:47:18,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1516 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 00:47:18,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2023-02-16 00:47:18,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 375. [2023-02-16 00:47:18,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 273 states have (on average 1.3553113553113554) internal successors, (370), 289 states have internal predecessors, (370), 80 states have call successors, (80), 22 states have call predecessors, (80), 21 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-02-16 00:47:18,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 516 transitions. [2023-02-16 00:47:18,368 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 516 transitions. Word has length 19 [2023-02-16 00:47:18,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:47:18,368 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 516 transitions. [2023-02-16 00:47:18,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:47:18,369 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 516 transitions. [2023-02-16 00:47:18,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-16 00:47:18,370 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:47:18,370 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:47:18,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 00:47:18,370 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:47:18,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:47:18,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1840508881, now seen corresponding path program 1 times [2023-02-16 00:47:18,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:47:18,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221594762] [2023-02-16 00:47:18,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:47:18,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:47:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:47:20,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 00:47:20,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:47:20,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221594762] [2023-02-16 00:47:20,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221594762] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:47:20,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:47:20,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 00:47:20,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885183450] [2023-02-16 00:47:20,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:47:20,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 00:47:20,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:47:20,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 00:47:20,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 00:47:20,122 INFO L87 Difference]: Start difference. First operand 375 states and 516 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:47:20,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:47:20,261 INFO L93 Difference]: Finished difference Result 395 states and 542 transitions. [2023-02-16 00:47:20,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 00:47:20,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-16 00:47:20,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:47:20,263 INFO L225 Difference]: With dead ends: 395 [2023-02-16 00:47:20,263 INFO L226 Difference]: Without dead ends: 375 [2023-02-16 00:47:20,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 00:47:20,264 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 12 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 00:47:20,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 965 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 00:47:20,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2023-02-16 00:47:20,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 375. [2023-02-16 00:47:20,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 273 states have (on average 1.3516483516483517) internal successors, (369), 289 states have internal predecessors, (369), 80 states have call successors, (80), 22 states have call predecessors, (80), 21 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-02-16 00:47:20,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 515 transitions. [2023-02-16 00:47:20,277 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 515 transitions. Word has length 23 [2023-02-16 00:47:20,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:47:20,278 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 515 transitions. [2023-02-16 00:47:20,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:47:20,278 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 515 transitions. [2023-02-16 00:47:20,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-16 00:47:20,279 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:47:20,279 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:47:20,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-16 00:47:20,279 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:47:20,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:47:20,280 INFO L85 PathProgramCache]: Analyzing trace with hash 2125296181, now seen corresponding path program 1 times [2023-02-16 00:47:20,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:47:20,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276315276] [2023-02-16 00:47:20,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:47:20,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:47:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:47:22,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 00:47:22,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:47:22,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276315276] [2023-02-16 00:47:22,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276315276] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:47:22,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:47:22,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 00:47:22,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274613838] [2023-02-16 00:47:22,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:47:22,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 00:47:22,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:47:22,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 00:47:22,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 00:47:22,262 INFO L87 Difference]: Start difference. First operand 375 states and 515 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:47:24,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:47:24,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:47:24,532 INFO L93 Difference]: Finished difference Result 869 states and 1216 transitions. [2023-02-16 00:47:24,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 00:47:24,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-16 00:47:24,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:47:24,536 INFO L225 Difference]: With dead ends: 869 [2023-02-16 00:47:24,536 INFO L226 Difference]: Without dead ends: 614 [2023-02-16 00:47:24,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 00:47:24,537 INFO L413 NwaCegarLoop]: 715 mSDtfsCounter, 431 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-02-16 00:47:24,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 1066 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 75 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2023-02-16 00:47:24,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2023-02-16 00:47:24,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 594. [2023-02-16 00:47:24,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 435 states have (on average 1.335632183908046) internal successors, (581), 445 states have internal predecessors, (581), 120 states have call successors, (120), 39 states have call predecessors, (120), 38 states have return successors, (129), 113 states have call predecessors, (129), 109 states have call successors, (129) [2023-02-16 00:47:24,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 830 transitions. [2023-02-16 00:47:24,556 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 830 transitions. Word has length 25 [2023-02-16 00:47:24,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:47:24,556 INFO L495 AbstractCegarLoop]: Abstraction has 594 states and 830 transitions. [2023-02-16 00:47:24,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:47:24,556 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 830 transitions. [2023-02-16 00:47:24,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-16 00:47:24,557 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:47:24,558 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:47:24,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-16 00:47:24,558 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:47:24,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:47:24,558 INFO L85 PathProgramCache]: Analyzing trace with hash -642930051, now seen corresponding path program 1 times [2023-02-16 00:47:24,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:47:24,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034492924] [2023-02-16 00:47:24,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:47:24,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:47:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:47:26,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 00:47:26,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:47:26,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034492924] [2023-02-16 00:47:26,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034492924] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:47:26,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:47:26,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 00:47:26,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133381703] [2023-02-16 00:47:26,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:47:26,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 00:47:26,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:47:26,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 00:47:26,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 00:47:26,575 INFO L87 Difference]: Start difference. First operand 594 states and 830 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:47:26,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:47:26,675 INFO L93 Difference]: Finished difference Result 1408 states and 2008 transitions. [2023-02-16 00:47:26,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 00:47:26,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-02-16 00:47:26,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:47:26,679 INFO L225 Difference]: With dead ends: 1408 [2023-02-16 00:47:26,680 INFO L226 Difference]: Without dead ends: 945 [2023-02-16 00:47:26,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 00:47:26,682 INFO L413 NwaCegarLoop]: 584 mSDtfsCounter, 421 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 00:47:26,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 924 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 00:47:26,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2023-02-16 00:47:26,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 915. [2023-02-16 00:47:26,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 663 states have (on average 1.3423831070889893) internal successors, (890), 674 states have internal predecessors, (890), 189 states have call successors, (189), 62 states have call predecessors, (189), 62 states have return successors, (223), 183 states have call predecessors, (223), 179 states have call successors, (223) [2023-02-16 00:47:26,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1302 transitions. [2023-02-16 00:47:26,709 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1302 transitions. Word has length 33 [2023-02-16 00:47:26,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:47:26,709 INFO L495 AbstractCegarLoop]: Abstraction has 915 states and 1302 transitions. [2023-02-16 00:47:26,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:47:26,710 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1302 transitions. [2023-02-16 00:47:26,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-16 00:47:26,710 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:47:26,711 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:47:26,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-16 00:47:26,711 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:47:26,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:47:26,711 INFO L85 PathProgramCache]: Analyzing trace with hash 401969732, now seen corresponding path program 1 times [2023-02-16 00:47:26,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:47:26,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259887285] [2023-02-16 00:47:26,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:47:26,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:47:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:47:28,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 00:47:28,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:47:28,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259887285] [2023-02-16 00:47:28,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259887285] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:47:28,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:47:28,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 00:47:28,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654841705] [2023-02-16 00:47:28,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:47:28,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 00:47:28,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:47:28,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 00:47:28,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 00:47:28,197 INFO L87 Difference]: Start difference. First operand 915 states and 1302 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:47:30,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:47:30,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:47:30,406 INFO L93 Difference]: Finished difference Result 929 states and 1321 transitions. [2023-02-16 00:47:30,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 00:47:30,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-02-16 00:47:30,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:47:30,415 INFO L225 Difference]: With dead ends: 929 [2023-02-16 00:47:30,415 INFO L226 Difference]: Without dead ends: 925 [2023-02-16 00:47:30,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 00:47:30,416 INFO L413 NwaCegarLoop]: 486 mSDtfsCounter, 28 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-02-16 00:47:30,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 909 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2023-02-16 00:47:30,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2023-02-16 00:47:30,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 924. [2023-02-16 00:47:30,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 673 states have (on average 1.3417533432392272) internal successors, (903), 682 states have internal predecessors, (903), 188 states have call successors, (188), 63 states have call predecessors, (188), 62 states have return successors, (223), 183 states have call predecessors, (223), 179 states have call successors, (223) [2023-02-16 00:47:30,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1314 transitions. [2023-02-16 00:47:30,448 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1314 transitions. Word has length 33 [2023-02-16 00:47:30,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:47:30,449 INFO L495 AbstractCegarLoop]: Abstraction has 924 states and 1314 transitions. [2023-02-16 00:47:30,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:47:30,449 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1314 transitions. [2023-02-16 00:47:30,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-16 00:47:30,452 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:47:30,452 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:47:30,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-16 00:47:30,453 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:47:30,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:47:30,453 INFO L85 PathProgramCache]: Analyzing trace with hash 937185154, now seen corresponding path program 1 times [2023-02-16 00:47:30,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:47:30,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41075003] [2023-02-16 00:47:30,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:47:30,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:47:31,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:47:32,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 00:47:32,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:47:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 00:47:32,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:47:32,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41075003] [2023-02-16 00:47:32,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41075003] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:47:32,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:47:32,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 00:47:32,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881522807] [2023-02-16 00:47:32,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:47:32,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 00:47:32,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:47:32,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 00:47:32,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-16 00:47:32,468 INFO L87 Difference]: Start difference. First operand 924 states and 1314 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 00:47:34,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:47:36,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:47:39,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:47:39,136 INFO L93 Difference]: Finished difference Result 981 states and 1395 transitions. [2023-02-16 00:47:39,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 00:47:39,137 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2023-02-16 00:47:39,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:47:39,142 INFO L225 Difference]: With dead ends: 981 [2023-02-16 00:47:39,144 INFO L226 Difference]: Without dead ends: 970 [2023-02-16 00:47:39,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-16 00:47:39,146 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 653 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 133 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-02-16 00:47:39,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [690 Valid, 980 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 769 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2023-02-16 00:47:39,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2023-02-16 00:47:39,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 948. [2023-02-16 00:47:39,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 695 states have (on average 1.3410071942446042) internal successors, (932), 706 states have internal predecessors, (932), 188 states have call successors, (188), 63 states have call predecessors, (188), 64 states have return successors, (232), 183 states have call predecessors, (232), 179 states have call successors, (232) [2023-02-16 00:47:39,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1352 transitions. [2023-02-16 00:47:39,191 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1352 transitions. Word has length 37 [2023-02-16 00:47:39,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:47:39,191 INFO L495 AbstractCegarLoop]: Abstraction has 948 states and 1352 transitions. [2023-02-16 00:47:39,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 00:47:39,192 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1352 transitions. [2023-02-16 00:47:39,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-16 00:47:39,193 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:47:39,193 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:47:39,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-16 00:47:39,194 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:47:39,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:47:39,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1448171803, now seen corresponding path program 1 times [2023-02-16 00:47:39,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:47:39,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076661361] [2023-02-16 00:47:39,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:47:39,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:47:40,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:47:41,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 00:47:41,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:47:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 00:47:41,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:47:41,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076661361] [2023-02-16 00:47:41,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076661361] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:47:41,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:47:41,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 00:47:41,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13271288] [2023-02-16 00:47:41,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:47:41,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 00:47:41,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:47:41,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 00:47:41,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-16 00:47:41,594 INFO L87 Difference]: Start difference. First operand 948 states and 1352 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 00:47:43,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:47:45,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:47:48,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:47:48,021 INFO L93 Difference]: Finished difference Result 972 states and 1380 transitions. [2023-02-16 00:47:48,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 00:47:48,021 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2023-02-16 00:47:48,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:47:48,025 INFO L225 Difference]: With dead ends: 972 [2023-02-16 00:47:48,025 INFO L226 Difference]: Without dead ends: 964 [2023-02-16 00:47:48,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-16 00:47:48,026 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 642 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 129 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-02-16 00:47:48,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [679 Valid, 974 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 765 Invalid, 2 Unknown, 0 Unchecked, 6.2s Time] [2023-02-16 00:47:48,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2023-02-16 00:47:48,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 948. [2023-02-16 00:47:48,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 695 states have (on average 1.339568345323741) internal successors, (931), 706 states have internal predecessors, (931), 188 states have call successors, (188), 63 states have call predecessors, (188), 64 states have return successors, (232), 183 states have call predecessors, (232), 179 states have call successors, (232) [2023-02-16 00:47:48,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1351 transitions. [2023-02-16 00:47:48,057 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1351 transitions. Word has length 38 [2023-02-16 00:47:48,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:47:48,057 INFO L495 AbstractCegarLoop]: Abstraction has 948 states and 1351 transitions. [2023-02-16 00:47:48,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 00:47:48,058 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1351 transitions. [2023-02-16 00:47:48,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-16 00:47:48,059 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:47:48,059 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:47:48,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-16 00:47:48,059 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:47:48,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:47:48,060 INFO L85 PathProgramCache]: Analyzing trace with hash 2084178201, now seen corresponding path program 1 times [2023-02-16 00:47:48,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:47:48,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928493096] [2023-02-16 00:47:48,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:47:48,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:47:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:47:49,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 00:47:49,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:47:49,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 00:47:49,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:47:49,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928493096] [2023-02-16 00:47:49,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928493096] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:47:49,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:47:49,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 00:47:49,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612796157] [2023-02-16 00:47:49,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:47:49,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 00:47:49,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:47:49,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 00:47:49,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 00:47:49,591 INFO L87 Difference]: Start difference. First operand 948 states and 1351 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 00:47:51,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:47:53,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:47:53,328 INFO L93 Difference]: Finished difference Result 1745 states and 2521 transitions. [2023-02-16 00:47:53,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 00:47:53,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2023-02-16 00:47:53,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:47:53,335 INFO L225 Difference]: With dead ends: 1745 [2023-02-16 00:47:53,335 INFO L226 Difference]: Without dead ends: 1716 [2023-02-16 00:47:53,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-16 00:47:53,336 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 686 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 126 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-02-16 00:47:53,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 981 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 401 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2023-02-16 00:47:53,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2023-02-16 00:47:53,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1677. [2023-02-16 00:47:53,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1218 states have (on average 1.348111658456486) internal successors, (1642), 1233 states have internal predecessors, (1642), 338 states have call successors, (338), 119 states have call predecessors, (338), 120 states have return successors, (446), 334 states have call predecessors, (446), 329 states have call successors, (446) [2023-02-16 00:47:53,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 2426 transitions. [2023-02-16 00:47:53,394 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 2426 transitions. Word has length 39 [2023-02-16 00:47:53,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:47:53,394 INFO L495 AbstractCegarLoop]: Abstraction has 1677 states and 2426 transitions. [2023-02-16 00:47:53,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 00:47:53,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 2426 transitions. [2023-02-16 00:47:53,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-16 00:47:53,395 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:47:53,395 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:47:53,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-16 00:47:53,395 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:47:53,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:47:53,396 INFO L85 PathProgramCache]: Analyzing trace with hash 193456973, now seen corresponding path program 1 times [2023-02-16 00:47:53,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:47:53,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664094945] [2023-02-16 00:47:53,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:47:53,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:47:54,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:47:55,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 00:47:55,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:47:55,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 00:47:55,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:47:55,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664094945] [2023-02-16 00:47:55,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664094945] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:47:55,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:47:55,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 00:47:55,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823761081] [2023-02-16 00:47:55,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:47:55,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 00:47:55,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:47:55,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 00:47:55,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 00:47:55,593 INFO L87 Difference]: Start difference. First operand 1677 states and 2426 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 00:47:57,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:47:59,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:48:01,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:48:01,834 INFO L93 Difference]: Finished difference Result 1710 states and 2471 transitions. [2023-02-16 00:48:01,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 00:48:01,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2023-02-16 00:48:01,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:48:01,841 INFO L225 Difference]: With dead ends: 1710 [2023-02-16 00:48:01,841 INFO L226 Difference]: Without dead ends: 1692 [2023-02-16 00:48:01,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-16 00:48:01,842 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 158 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 65 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-02-16 00:48:01,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 1235 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 541 Invalid, 2 Unknown, 0 Unchecked, 6.1s Time] [2023-02-16 00:48:01,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2023-02-16 00:48:01,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1673. [2023-02-16 00:48:01,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1215 states have (on average 1.348148148148148) internal successors, (1638), 1230 states have internal predecessors, (1638), 337 states have call successors, (337), 119 states have call predecessors, (337), 120 states have return successors, (445), 333 states have call predecessors, (445), 328 states have call successors, (445) [2023-02-16 00:48:01,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 2420 transitions. [2023-02-16 00:48:01,902 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 2420 transitions. Word has length 40 [2023-02-16 00:48:01,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:48:01,902 INFO L495 AbstractCegarLoop]: Abstraction has 1673 states and 2420 transitions. [2023-02-16 00:48:01,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 00:48:01,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 2420 transitions. [2023-02-16 00:48:01,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-16 00:48:01,903 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:48:01,903 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:48:01,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-16 00:48:01,903 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:48:01,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:48:01,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1037165454, now seen corresponding path program 1 times [2023-02-16 00:48:01,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:48:01,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128177916] [2023-02-16 00:48:01,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:48:01,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:48:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:48:03,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-16 00:48:03,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:48:03,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 00:48:03,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:48:03,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128177916] [2023-02-16 00:48:03,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128177916] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:48:03,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:48:03,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 00:48:03,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052608632] [2023-02-16 00:48:03,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:48:03,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 00:48:03,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:48:03,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 00:48:03,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 00:48:03,472 INFO L87 Difference]: Start difference. First operand 1673 states and 2420 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 00:48:05,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:48:07,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:48:09,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:48:13,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:48:13,214 INFO L93 Difference]: Finished difference Result 2633 states and 4035 transitions. [2023-02-16 00:48:13,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 00:48:13,215 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2023-02-16 00:48:13,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:48:13,224 INFO L225 Difference]: With dead ends: 2633 [2023-02-16 00:48:13,224 INFO L226 Difference]: Without dead ends: 2625 [2023-02-16 00:48:13,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-16 00:48:13,226 INFO L413 NwaCegarLoop]: 523 mSDtfsCounter, 437 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 125 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 1031 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2023-02-16 00:48:13,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 1031 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 690 Invalid, 3 Unknown, 0 Unchecked, 9.5s Time] [2023-02-16 00:48:13,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2023-02-16 00:48:13,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 1815. [2023-02-16 00:48:13,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1815 states, 1317 states have (on average 1.3500379650721337) internal successors, (1778), 1336 states have internal predecessors, (1778), 365 states have call successors, (365), 128 states have call predecessors, (365), 132 states have return successors, (494), 360 states have call predecessors, (494), 356 states have call successors, (494) [2023-02-16 00:48:13,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 2637 transitions. [2023-02-16 00:48:13,306 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 2637 transitions. Word has length 43 [2023-02-16 00:48:13,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:48:13,307 INFO L495 AbstractCegarLoop]: Abstraction has 1815 states and 2637 transitions. [2023-02-16 00:48:13,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 00:48:13,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 2637 transitions. [2023-02-16 00:48:13,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-16 00:48:13,307 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:48:13,307 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:48:13,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-16 00:48:13,308 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:48:13,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:48:13,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1937989103, now seen corresponding path program 1 times [2023-02-16 00:48:13,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:48:13,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491050809] [2023-02-16 00:48:13,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:48:13,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:48:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:48:15,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-16 00:48:15,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:48:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 00:48:15,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:48:15,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491050809] [2023-02-16 00:48:15,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491050809] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:48:15,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:48:15,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 00:48:15,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946322166] [2023-02-16 00:48:15,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:48:15,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 00:48:15,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:48:15,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 00:48:15,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-16 00:48:15,518 INFO L87 Difference]: Start difference. First operand 1815 states and 2637 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 00:48:17,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:48:19,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:48:22,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:48:22,430 INFO L93 Difference]: Finished difference Result 1864 states and 2700 transitions. [2023-02-16 00:48:22,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 00:48:22,431 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-02-16 00:48:22,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:48:22,437 INFO L225 Difference]: With dead ends: 1864 [2023-02-16 00:48:22,438 INFO L226 Difference]: Without dead ends: 1832 [2023-02-16 00:48:22,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-02-16 00:48:22,439 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 171 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 66 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-02-16 00:48:22,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 1552 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 728 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2023-02-16 00:48:22,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2023-02-16 00:48:22,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1813. [2023-02-16 00:48:22,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1316 states have (on average 1.3487841945288754) internal successors, (1775), 1335 states have internal predecessors, (1775), 364 states have call successors, (364), 128 states have call predecessors, (364), 132 states have return successors, (493), 359 states have call predecessors, (493), 355 states have call successors, (493) [2023-02-16 00:48:22,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 2632 transitions. [2023-02-16 00:48:22,513 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 2632 transitions. Word has length 44 [2023-02-16 00:48:22,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:48:22,513 INFO L495 AbstractCegarLoop]: Abstraction has 1813 states and 2632 transitions. [2023-02-16 00:48:22,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 00:48:22,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 2632 transitions. [2023-02-16 00:48:22,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-16 00:48:22,514 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:48:22,514 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:48:22,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-16 00:48:22,514 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:48:22,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:48:22,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1633946811, now seen corresponding path program 1 times [2023-02-16 00:48:22,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:48:22,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011612213] [2023-02-16 00:48:22,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:48:22,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:48:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:48:24,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-16 00:48:24,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:48:24,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 00:48:24,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:48:24,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011612213] [2023-02-16 00:48:24,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011612213] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:48:24,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:48:24,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 00:48:24,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151977825] [2023-02-16 00:48:24,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:48:24,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 00:48:24,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:48:24,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 00:48:24,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-16 00:48:24,686 INFO L87 Difference]: Start difference. First operand 1813 states and 2632 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 00:48:26,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:48:28,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:48:30,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:48:35,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:48:35,260 INFO L93 Difference]: Finished difference Result 2635 states and 4032 transitions. [2023-02-16 00:48:35,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 00:48:35,261 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-02-16 00:48:35,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:48:35,271 INFO L225 Difference]: With dead ends: 2635 [2023-02-16 00:48:35,271 INFO L226 Difference]: Without dead ends: 2627 [2023-02-16 00:48:35,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-16 00:48:35,272 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 1224 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 425 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1253 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2023-02-16 00:48:35,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1253 Valid, 1133 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 1067 Invalid, 3 Unknown, 0 Unchecked, 10.1s Time] [2023-02-16 00:48:35,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2627 states. [2023-02-16 00:48:35,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2627 to 1813. [2023-02-16 00:48:35,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1316 states have (on average 1.3480243161094225) internal successors, (1774), 1335 states have internal predecessors, (1774), 364 states have call successors, (364), 128 states have call predecessors, (364), 132 states have return successors, (493), 359 states have call predecessors, (493), 355 states have call successors, (493) [2023-02-16 00:48:35,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 2631 transitions. [2023-02-16 00:48:35,363 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 2631 transitions. Word has length 44 [2023-02-16 00:48:35,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:48:35,363 INFO L495 AbstractCegarLoop]: Abstraction has 1813 states and 2631 transitions. [2023-02-16 00:48:35,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 00:48:35,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 2631 transitions. [2023-02-16 00:48:35,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-16 00:48:35,364 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:48:35,364 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:48:35,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-16 00:48:35,364 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:48:35,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:48:35,364 INFO L85 PathProgramCache]: Analyzing trace with hash -9767716, now seen corresponding path program 1 times [2023-02-16 00:48:35,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:48:35,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129939764] [2023-02-16 00:48:35,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:48:35,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:48:36,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:48:37,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-16 00:48:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:48:37,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 00:48:37,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:48:37,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129939764] [2023-02-16 00:48:37,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129939764] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:48:37,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:48:37,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-16 00:48:37,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971345381] [2023-02-16 00:48:37,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:48:37,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 00:48:37,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:48:37,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 00:48:37,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-16 00:48:37,989 INFO L87 Difference]: Start difference. First operand 1813 states and 2631 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 00:48:40,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:48:42,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:48:44,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:48:46,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:48:48,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:48:50,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:48:52,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:48:54,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:48:58,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:48:58,107 INFO L93 Difference]: Finished difference Result 1982 states and 2970 transitions. [2023-02-16 00:48:58,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 00:48:58,110 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-02-16 00:48:58,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:48:58,117 INFO L225 Difference]: With dead ends: 1982 [2023-02-16 00:48:58,117 INFO L226 Difference]: Without dead ends: 1978 [2023-02-16 00:48:58,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-16 00:48:58,118 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 91 mSDsluCounter, 1926 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 75 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 2351 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.9s IncrementalHoareTripleChecker+Time [2023-02-16 00:48:58,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 2351 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1099 Invalid, 8 Unknown, 0 Unchecked, 19.9s Time] [2023-02-16 00:48:58,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2023-02-16 00:48:58,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1820. [2023-02-16 00:48:58,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1323 states have (on average 1.346938775510204) internal successors, (1782), 1342 states have internal predecessors, (1782), 364 states have call successors, (364), 128 states have call predecessors, (364), 132 states have return successors, (493), 359 states have call predecessors, (493), 355 states have call successors, (493) [2023-02-16 00:48:58,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 2639 transitions. [2023-02-16 00:48:58,222 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 2639 transitions. Word has length 45 [2023-02-16 00:48:58,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:48:58,222 INFO L495 AbstractCegarLoop]: Abstraction has 1820 states and 2639 transitions. [2023-02-16 00:48:58,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 00:48:58,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 2639 transitions. [2023-02-16 00:48:58,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-16 00:48:58,223 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:48:58,223 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:48:58,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-16 00:48:58,224 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:48:58,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:48:58,224 INFO L85 PathProgramCache]: Analyzing trace with hash -10044546, now seen corresponding path program 1 times [2023-02-16 00:48:58,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:48:58,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681268042] [2023-02-16 00:48:58,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:48:58,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:48:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:49:00,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-16 00:49:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:49:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 00:49:00,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:49:00,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681268042] [2023-02-16 00:49:00,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681268042] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:49:00,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:49:00,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 00:49:00,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023629888] [2023-02-16 00:49:00,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:49:00,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 00:49:00,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:49:00,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 00:49:00,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-16 00:49:00,234 INFO L87 Difference]: Start difference. First operand 1820 states and 2639 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 00:49:02,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:49:04,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:49:06,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:49:10,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:49:10,904 INFO L93 Difference]: Finished difference Result 2636 states and 4032 transitions. [2023-02-16 00:49:10,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 00:49:10,905 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-02-16 00:49:10,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:49:10,915 INFO L225 Difference]: With dead ends: 2636 [2023-02-16 00:49:10,916 INFO L226 Difference]: Without dead ends: 2620 [2023-02-16 00:49:10,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-16 00:49:10,918 INFO L413 NwaCegarLoop]: 494 mSDtfsCounter, 1208 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 424 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2023-02-16 00:49:10,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1238 Valid, 1130 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 1064 Invalid, 3 Unknown, 0 Unchecked, 10.1s Time] [2023-02-16 00:49:10,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2620 states. [2023-02-16 00:49:11,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2620 to 1812. [2023-02-16 00:49:11,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1316 states have (on average 1.3472644376899696) internal successors, (1773), 1335 states have internal predecessors, (1773), 363 states have call successors, (363), 128 states have call predecessors, (363), 132 states have return successors, (492), 358 states have call predecessors, (492), 354 states have call successors, (492) [2023-02-16 00:49:11,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 2628 transitions. [2023-02-16 00:49:11,032 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 2628 transitions. Word has length 45 [2023-02-16 00:49:11,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:49:11,032 INFO L495 AbstractCegarLoop]: Abstraction has 1812 states and 2628 transitions. [2023-02-16 00:49:11,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 00:49:11,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 2628 transitions. [2023-02-16 00:49:11,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-16 00:49:11,033 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:49:11,033 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:49:11,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-16 00:49:11,034 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:49:11,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:49:11,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1045402083, now seen corresponding path program 1 times [2023-02-16 00:49:11,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:49:11,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888665925] [2023-02-16 00:49:11,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:49:11,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:49:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:49:13,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 00:49:13,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:49:13,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888665925] [2023-02-16 00:49:13,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888665925] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:49:13,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:49:13,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 00:49:13,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092011610] [2023-02-16 00:49:13,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:49:13,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 00:49:13,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:49:13,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 00:49:13,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 00:49:13,057 INFO L87 Difference]: Start difference. First operand 1812 states and 2628 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:49:13,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:49:13,896 INFO L93 Difference]: Finished difference Result 1839 states and 2653 transitions. [2023-02-16 00:49:13,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 00:49:13,897 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-02-16 00:49:13,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:49:13,918 INFO L225 Difference]: With dead ends: 1839 [2023-02-16 00:49:13,919 INFO L226 Difference]: Without dead ends: 1815 [2023-02-16 00:49:13,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-16 00:49:13,920 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 482 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-16 00:49:13,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 752 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-16 00:49:13,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2023-02-16 00:49:14,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1804. [2023-02-16 00:49:14,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1309 states have (on average 1.3475935828877006) internal successors, (1764), 1329 states have internal predecessors, (1764), 363 states have call successors, (363), 128 states have call predecessors, (363), 131 states have return successors, (490), 356 states have call predecessors, (490), 354 states have call successors, (490) [2023-02-16 00:49:14,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 2617 transitions. [2023-02-16 00:49:14,017 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 2617 transitions. Word has length 44 [2023-02-16 00:49:14,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:49:14,017 INFO L495 AbstractCegarLoop]: Abstraction has 1804 states and 2617 transitions. [2023-02-16 00:49:14,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:49:14,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 2617 transitions. [2023-02-16 00:49:14,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-16 00:49:14,018 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:49:14,018 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:49:14,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-16 00:49:14,019 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:49:14,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:49:14,019 INFO L85 PathProgramCache]: Analyzing trace with hash 470915374, now seen corresponding path program 1 times [2023-02-16 00:49:14,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:49:14,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448033810] [2023-02-16 00:49:14,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:49:14,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:49:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:49:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 00:49:16,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:49:16,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448033810] [2023-02-16 00:49:16,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448033810] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:49:16,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:49:16,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 00:49:16,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589473694] [2023-02-16 00:49:16,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:49:16,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 00:49:16,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:49:16,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 00:49:16,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 00:49:16,150 INFO L87 Difference]: Start difference. First operand 1804 states and 2617 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:49:16,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:49:16,944 INFO L93 Difference]: Finished difference Result 1842 states and 2658 transitions. [2023-02-16 00:49:16,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 00:49:16,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-02-16 00:49:16,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:49:16,950 INFO L225 Difference]: With dead ends: 1842 [2023-02-16 00:49:16,950 INFO L226 Difference]: Without dead ends: 1805 [2023-02-16 00:49:16,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-16 00:49:16,951 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 467 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-16 00:49:16,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 761 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-16 00:49:16,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2023-02-16 00:49:17,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1803. [2023-02-16 00:49:17,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1308 states have (on average 1.345565749235474) internal successors, (1760), 1328 states have internal predecessors, (1760), 363 states have call successors, (363), 128 states have call predecessors, (363), 131 states have return successors, (489), 356 states have call predecessors, (489), 354 states have call successors, (489) [2023-02-16 00:49:17,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 2612 transitions. [2023-02-16 00:49:17,046 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 2612 transitions. Word has length 44 [2023-02-16 00:49:17,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:49:17,046 INFO L495 AbstractCegarLoop]: Abstraction has 1803 states and 2612 transitions. [2023-02-16 00:49:17,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:49:17,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 2612 transitions. [2023-02-16 00:49:17,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-16 00:49:17,047 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:49:17,047 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:49:17,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-16 00:49:17,047 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:49:17,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:49:17,047 INFO L85 PathProgramCache]: Analyzing trace with hash -103073746, now seen corresponding path program 1 times [2023-02-16 00:49:17,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:49:17,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069207735] [2023-02-16 00:49:17,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:49:17,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:49:18,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:49:18,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 00:49:18,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:49:18,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069207735] [2023-02-16 00:49:18,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069207735] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:49:18,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:49:18,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 00:49:18,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46963226] [2023-02-16 00:49:18,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:49:18,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 00:49:18,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:49:18,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 00:49:18,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 00:49:18,614 INFO L87 Difference]: Start difference. First operand 1803 states and 2612 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:49:20,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:49:20,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:49:20,973 INFO L93 Difference]: Finished difference Result 2542 states and 3790 transitions. [2023-02-16 00:49:20,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 00:49:20,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-02-16 00:49:20,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:49:20,994 INFO L225 Difference]: With dead ends: 2542 [2023-02-16 00:49:20,994 INFO L226 Difference]: Without dead ends: 2529 [2023-02-16 00:49:20,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 00:49:20,996 INFO L413 NwaCegarLoop]: 762 mSDtfsCounter, 321 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-02-16 00:49:20,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 1173 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2023-02-16 00:49:20,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2023-02-16 00:49:21,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 1803. [2023-02-16 00:49:21,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1308 states have (on average 1.3432721712538227) internal successors, (1757), 1328 states have internal predecessors, (1757), 362 states have call successors, (362), 128 states have call predecessors, (362), 132 states have return successors, (497), 356 states have call predecessors, (497), 354 states have call successors, (497) [2023-02-16 00:49:21,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 2616 transitions. [2023-02-16 00:49:21,104 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 2616 transitions. Word has length 44 [2023-02-16 00:49:21,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:49:21,104 INFO L495 AbstractCegarLoop]: Abstraction has 1803 states and 2616 transitions. [2023-02-16 00:49:21,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:49:21,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 2616 transitions. [2023-02-16 00:49:21,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-16 00:49:21,105 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:49:21,105 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:49:21,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-16 00:49:21,105 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:49:21,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:49:21,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1553092361, now seen corresponding path program 1 times [2023-02-16 00:49:21,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:49:21,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782523826] [2023-02-16 00:49:21,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:49:21,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:49:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:49:23,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 00:49:23,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:49:23,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782523826] [2023-02-16 00:49:23,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782523826] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:49:23,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:49:23,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 00:49:23,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272202691] [2023-02-16 00:49:23,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:49:23,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 00:49:23,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:49:23,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 00:49:23,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-16 00:49:23,231 INFO L87 Difference]: Start difference. First operand 1803 states and 2616 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:49:25,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:49:27,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:49:29,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:49:31,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:49:33,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:49:33,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:49:33,823 INFO L93 Difference]: Finished difference Result 1817 states and 2631 transitions. [2023-02-16 00:49:33,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 00:49:33,823 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-02-16 00:49:33,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:49:33,828 INFO L225 Difference]: With dead ends: 1817 [2023-02-16 00:49:33,829 INFO L226 Difference]: Without dead ends: 1813 [2023-02-16 00:49:33,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-16 00:49:33,830 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 42 mSDsluCounter, 1789 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 2249 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2023-02-16 00:49:33,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 2249 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 5 Unknown, 0 Unchecked, 10.4s Time] [2023-02-16 00:49:33,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2023-02-16 00:49:33,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 1809. [2023-02-16 00:49:33,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1314 states have (on average 1.3424657534246576) internal successors, (1764), 1334 states have internal predecessors, (1764), 362 states have call successors, (362), 128 states have call predecessors, (362), 132 states have return successors, (497), 356 states have call predecessors, (497), 354 states have call successors, (497) [2023-02-16 00:49:33,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 2623 transitions. [2023-02-16 00:49:33,924 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 2623 transitions. Word has length 45 [2023-02-16 00:49:33,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:49:33,924 INFO L495 AbstractCegarLoop]: Abstraction has 1809 states and 2623 transitions. [2023-02-16 00:49:33,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:49:33,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 2623 transitions. [2023-02-16 00:49:33,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-16 00:49:33,925 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:49:33,925 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:49:33,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-16 00:49:33,925 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:49:33,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:49:33,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1552815531, now seen corresponding path program 1 times [2023-02-16 00:49:33,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:49:33,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372815588] [2023-02-16 00:49:33,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:49:33,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:49:34,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:49:35,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 00:49:35,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:49:35,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372815588] [2023-02-16 00:49:35,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372815588] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:49:35,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:49:35,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 00:49:35,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237122305] [2023-02-16 00:49:35,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:49:35,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 00:49:35,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:49:35,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 00:49:35,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-16 00:49:35,889 INFO L87 Difference]: Start difference. First operand 1809 states and 2623 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:49:38,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:49:39,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:49:39,588 INFO L93 Difference]: Finished difference Result 2549 states and 3796 transitions. [2023-02-16 00:49:39,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 00:49:39,588 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-02-16 00:49:39,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:49:39,594 INFO L225 Difference]: With dead ends: 2549 [2023-02-16 00:49:39,595 INFO L226 Difference]: Without dead ends: 2522 [2023-02-16 00:49:39,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-02-16 00:49:39,596 INFO L413 NwaCegarLoop]: 664 mSDtfsCounter, 1119 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 427 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1120 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-02-16 00:49:39,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1120 Valid, 1290 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 469 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2023-02-16 00:49:39,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2522 states. [2023-02-16 00:49:39,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2522 to 1786. [2023-02-16 00:49:39,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1291 states have (on average 1.3446940356312935) internal successors, (1736), 1311 states have internal predecessors, (1736), 362 states have call successors, (362), 128 states have call predecessors, (362), 132 states have return successors, (497), 356 states have call predecessors, (497), 354 states have call successors, (497) [2023-02-16 00:49:39,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 2595 transitions. [2023-02-16 00:49:39,796 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 2595 transitions. Word has length 45 [2023-02-16 00:49:39,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:49:39,797 INFO L495 AbstractCegarLoop]: Abstraction has 1786 states and 2595 transitions. [2023-02-16 00:49:39,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:49:39,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 2595 transitions. [2023-02-16 00:49:39,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-16 00:49:39,798 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:49:39,798 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:49:39,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-16 00:49:39,798 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:49:39,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:49:39,798 INFO L85 PathProgramCache]: Analyzing trace with hash -974225584, now seen corresponding path program 1 times [2023-02-16 00:49:39,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:49:39,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778287500] [2023-02-16 00:49:39,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:49:39,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:49:40,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:49:42,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-16 00:49:42,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:49:42,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 00:49:42,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:49:42,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778287500] [2023-02-16 00:49:42,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778287500] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:49:42,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:49:42,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-16 00:49:42,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826498309] [2023-02-16 00:49:42,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:49:42,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 00:49:42,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:49:42,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 00:49:42,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-16 00:49:42,191 INFO L87 Difference]: Start difference. First operand 1786 states and 2595 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 00:49:44,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:49:46,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:49:48,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:49:50,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:49:52,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:49:54,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:49:56,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:49:58,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:50:02,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:50:02,643 INFO L93 Difference]: Finished difference Result 1946 states and 2923 transitions. [2023-02-16 00:50:02,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 00:50:02,643 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-02-16 00:50:02,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:50:02,649 INFO L225 Difference]: With dead ends: 1946 [2023-02-16 00:50:02,649 INFO L226 Difference]: Without dead ends: 1927 [2023-02-16 00:50:02,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-16 00:50:02,651 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 87 mSDsluCounter, 1765 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 71 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 2153 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.2s IncrementalHoareTripleChecker+Time [2023-02-16 00:50:02,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 2153 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1051 Invalid, 8 Unknown, 0 Unchecked, 20.2s Time] [2023-02-16 00:50:02,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1927 states. [2023-02-16 00:50:02,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1927 to 1773. [2023-02-16 00:50:02,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1773 states, 1279 states have (on average 1.346364347146208) internal successors, (1722), 1299 states have internal predecessors, (1722), 361 states have call successors, (361), 128 states have call predecessors, (361), 132 states have return successors, (496), 355 states have call predecessors, (496), 353 states have call successors, (496) [2023-02-16 00:50:02,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1773 states to 1773 states and 2579 transitions. [2023-02-16 00:50:02,761 INFO L78 Accepts]: Start accepts. Automaton has 1773 states and 2579 transitions. Word has length 47 [2023-02-16 00:50:02,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:50:02,761 INFO L495 AbstractCegarLoop]: Abstraction has 1773 states and 2579 transitions. [2023-02-16 00:50:02,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-16 00:50:02,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1773 states and 2579 transitions. [2023-02-16 00:50:02,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-16 00:50:02,762 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:50:02,762 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:50:02,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-16 00:50:02,763 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:50:02,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:50:02,763 INFO L85 PathProgramCache]: Analyzing trace with hash 571500937, now seen corresponding path program 1 times [2023-02-16 00:50:02,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:50:02,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035998169] [2023-02-16 00:50:02,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:50:02,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:50:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:50:05,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-16 00:50:05,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:50:05,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 00:50:05,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:50:05,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 00:50:05,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:50:05,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035998169] [2023-02-16 00:50:05,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035998169] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:50:05,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:50:05,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-16 00:50:05,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605721896] [2023-02-16 00:50:05,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:50:05,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-16 00:50:05,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:50:05,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-16 00:50:05,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-02-16 00:50:05,432 INFO L87 Difference]: Start difference. First operand 1773 states and 2579 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-16 00:50:07,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:50:09,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:50:11,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:50:13,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:50:15,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:50:17,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:50:19,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:50:21,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:50:23,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:50:25,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:50:30,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:50:30,742 INFO L93 Difference]: Finished difference Result 1929 states and 2903 transitions. [2023-02-16 00:50:30,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-16 00:50:30,744 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2023-02-16 00:50:30,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:50:30,749 INFO L225 Difference]: With dead ends: 1929 [2023-02-16 00:50:30,749 INFO L226 Difference]: Without dead ends: 1897 [2023-02-16 00:50:30,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-16 00:50:30,750 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 86 mSDsluCounter, 2332 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 68 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 2707 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.1s IncrementalHoareTripleChecker+Time [2023-02-16 00:50:30,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 2707 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1344 Invalid, 10 Unknown, 0 Unchecked, 25.1s Time] [2023-02-16 00:50:30,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1897 states. [2023-02-16 00:50:30,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1897 to 1740. [2023-02-16 00:50:30,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1740 states, 1251 states have (on average 1.3509192645883292) internal successors, (1690), 1270 states have internal predecessors, (1690), 358 states have call successors, (358), 126 states have call predecessors, (358), 130 states have return successors, (486), 353 states have call predecessors, (486), 351 states have call successors, (486) [2023-02-16 00:50:30,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1740 states to 1740 states and 2534 transitions. [2023-02-16 00:50:30,914 INFO L78 Accepts]: Start accepts. Automaton has 1740 states and 2534 transitions. Word has length 55 [2023-02-16 00:50:30,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:50:30,914 INFO L495 AbstractCegarLoop]: Abstraction has 1740 states and 2534 transitions. [2023-02-16 00:50:30,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-16 00:50:30,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1740 states and 2534 transitions. [2023-02-16 00:50:30,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-16 00:50:30,915 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:50:30,915 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:50:30,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-16 00:50:30,916 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:50:30,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:50:30,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1520031651, now seen corresponding path program 1 times [2023-02-16 00:50:30,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:50:30,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901443445] [2023-02-16 00:50:30,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:50:30,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:50:31,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:50:32,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-16 00:50:32,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:50:32,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-16 00:50:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:50:32,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-02-16 00:50:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:50:32,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-02-16 00:50:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:50:32,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-16 00:50:32,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:50:32,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 00:50:32,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:50:32,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901443445] [2023-02-16 00:50:32,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901443445] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:50:32,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:50:32,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 00:50:32,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601827293] [2023-02-16 00:50:32,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:50:32,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 00:50:32,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:50:32,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 00:50:32,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-16 00:50:32,734 INFO L87 Difference]: Start difference. First operand 1740 states and 2534 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-16 00:50:34,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:50:36,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:50:38,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:50:42,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:50:42,407 INFO L93 Difference]: Finished difference Result 1992 states and 2963 transitions. [2023-02-16 00:50:42,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 00:50:42,408 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2023-02-16 00:50:42,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:50:42,411 INFO L225 Difference]: With dead ends: 1992 [2023-02-16 00:50:42,411 INFO L226 Difference]: Without dead ends: 1190 [2023-02-16 00:50:42,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-02-16 00:50:42,413 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 628 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 92 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2023-02-16 00:50:42,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [672 Valid, 888 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 845 Invalid, 3 Unknown, 0 Unchecked, 9.3s Time] [2023-02-16 00:50:42,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2023-02-16 00:50:42,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1036. [2023-02-16 00:50:42,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 758 states have (on average 1.3324538258575198) internal successors, (1010), 772 states have internal predecessors, (1010), 195 states have call successors, (195), 78 states have call predecessors, (195), 82 states have return successors, (269), 192 states have call predecessors, (269), 188 states have call successors, (269) [2023-02-16 00:50:42,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 1474 transitions. [2023-02-16 00:50:42,481 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 1474 transitions. Word has length 73 [2023-02-16 00:50:42,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:50:42,481 INFO L495 AbstractCegarLoop]: Abstraction has 1036 states and 1474 transitions. [2023-02-16 00:50:42,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-16 00:50:42,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 1474 transitions. [2023-02-16 00:50:42,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-16 00:50:42,482 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:50:42,482 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:50:42,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-16 00:50:42,482 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:50:42,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:50:42,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1400087629, now seen corresponding path program 1 times [2023-02-16 00:50:42,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:50:42,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631114644] [2023-02-16 00:50:42,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:50:42,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:50:43,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:50:44,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-16 00:50:44,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:50:44,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-16 00:50:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:50:44,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-02-16 00:50:44,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:50:44,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-16 00:50:44,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:50:44,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 00:50:44,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:50:44,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631114644] [2023-02-16 00:50:44,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631114644] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:50:44,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:50:44,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 00:50:44,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654517209] [2023-02-16 00:50:44,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:50:44,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 00:50:44,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:50:44,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 00:50:44,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-16 00:50:44,184 INFO L87 Difference]: Start difference. First operand 1036 states and 1474 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-16 00:50:46,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:50:48,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:50:50,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:50:52,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-16 00:50:54,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []