./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 2329fc70 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-?-2329fc7 [2023-02-13 23:17:52,169 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-13 23:17:52,170 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-13 23:17:52,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-13 23:17:52,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-13 23:17:52,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-13 23:17:52,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-13 23:17:52,199 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-13 23:17:52,200 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-13 23:17:52,202 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-13 23:17:52,203 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-13 23:17:52,207 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-13 23:17:52,207 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-13 23:17:52,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-13 23:17:52,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-13 23:17:52,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-13 23:17:52,216 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-13 23:17:52,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-13 23:17:52,219 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-13 23:17:52,223 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-13 23:17:52,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-13 23:17:52,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-13 23:17:52,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-13 23:17:52,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-13 23:17:52,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-13 23:17:52,232 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-13 23:17:52,232 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-13 23:17:52,233 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-13 23:17:52,233 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-13 23:17:52,233 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-13 23:17:52,234 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-13 23:17:52,234 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-13 23:17:52,234 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-13 23:17:52,235 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-13 23:17:52,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-13 23:17:52,235 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-13 23:17:52,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-13 23:17:52,236 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-13 23:17:52,236 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-13 23:17:52,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-13 23:17:52,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-13 23:17:52,240 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-13 23:17:52,268 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-13 23:17:52,268 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-13 23:17:52,268 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-13 23:17:52,268 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-13 23:17:52,269 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-13 23:17:52,269 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-13 23:17:52,269 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-13 23:17:52,269 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-13 23:17:52,270 INFO L138 SettingsManager]: * Use SBE=true [2023-02-13 23:17:52,270 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-13 23:17:52,270 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-13 23:17:52,270 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-13 23:17:52,270 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-13 23:17:52,271 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-13 23:17:52,271 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-13 23:17:52,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-13 23:17:52,271 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-13 23:17:52,271 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-13 23:17:52,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-13 23:17:52,271 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-13 23:17:52,271 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-13 23:17:52,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-13 23:17:52,271 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-13 23:17:52,271 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-13 23:17:52,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 23:17:52,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-13 23:17:52,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-13 23:17:52,272 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-13 23:17:52,272 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-13 23:17:52,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-13 23:17:52,272 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-13 23:17:52,272 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-13 23:17:52,272 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-13 23:17:52,272 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-13 23:17:52,272 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-13 23:17:52,273 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0996d70f204c5713a65b04e25037e48d7532ec1ba0c10162e12c5c0d518b4e3 [2023-02-13 23:17:52,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-13 23:17:52,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-13 23:17:52,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-13 23:17:52,488 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-13 23:17:52,488 INFO L275 PluginConnector]: CDTParser initialized [2023-02-13 23:17:52,489 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/diskperf.i.cil-1.c [2023-02-13 23:17:53,371 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-13 23:17:53,732 INFO L351 CDTParser]: Found 1 translation units. [2023-02-13 23:17:53,733 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/diskperf.i.cil-1.c [2023-02-13 23:17:53,756 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbc4c1743/6c6fab3aa73449c0ad4c368e0af07f1f/FLAGc15b645b8 [2023-02-13 23:17:53,973 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbc4c1743/6c6fab3aa73449c0ad4c368e0af07f1f [2023-02-13 23:17:53,975 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-13 23:17:53,976 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-13 23:17:53,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-13 23:17:53,977 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-13 23:17:53,980 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-13 23:17:53,980 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 11:17:53" (1/1) ... [2023-02-13 23:17:53,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48f1a3aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:17:53, skipping insertion in model container [2023-02-13 23:17:53,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 11:17:53" (1/1) ... [2023-02-13 23:17:53,985 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-13 23:17:54,035 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-13 23:17:54,377 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] [2023-02-13 23:17:54,474 WARN L623 FunctionHandler]: Unknown extern function swprintf [2023-02-13 23:17:54,558 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 23:17:54,622 INFO L203 MainTranslator]: Completed pre-run [2023-02-13 23:17:54,683 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] [2023-02-13 23:17:54,737 WARN L623 FunctionHandler]: Unknown extern function swprintf [2023-02-13 23:17:54,812 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 23:17:54,851 INFO L208 MainTranslator]: Completed translation [2023-02-13 23:17:54,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:17:54 WrapperNode [2023-02-13 23:17:54,852 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-13 23:17:54,853 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-13 23:17:54,854 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-13 23:17:54,854 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-13 23:17:54,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:17:54" (1/1) ... [2023-02-13 23:17:54,914 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:17:54" (1/1) ... [2023-02-13 23:17:54,971 INFO L138 Inliner]: procedures = 127, calls = 1459, calls flagged for inlining = 20, calls inlined = 18, statements flattened = 3749 [2023-02-13 23:17:54,971 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-13 23:17:54,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-13 23:17:54,972 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-13 23:17:54,972 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-13 23:17:54,978 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:17:54" (1/1) ... [2023-02-13 23:17:54,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:17:54" (1/1) ... [2023-02-13 23:17:55,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:17:54" (1/1) ... [2023-02-13 23:17:55,009 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:17:54" (1/1) ... [2023-02-13 23:17:55,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:17:54" (1/1) ... [2023-02-13 23:17:55,169 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:17:54" (1/1) ... [2023-02-13 23:17:55,183 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:17:54" (1/1) ... [2023-02-13 23:17:55,203 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:17:54" (1/1) ... [2023-02-13 23:17:55,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-13 23:17:55,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-13 23:17:55,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-13 23:17:55,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-13 23:17:55,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:17:54" (1/1) ... [2023-02-13 23:17:55,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 23:17:55,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:17:55,246 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) [2023-02-13 23:17:55,264 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 [2023-02-13 23:17:55,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-02-13 23:17:55,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-02-13 23:17:55,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-02-13 23:17:55,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-13 23:17:55,273 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2023-02-13 23:17:55,273 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2023-02-13 23:17:55,273 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfSendToNextDriver [2023-02-13 23:17:55,273 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfSendToNextDriver [2023-02-13 23:17:55,273 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2023-02-13 23:17:55,274 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2023-02-13 23:17:55,274 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfAddCounters [2023-02-13 23:17:55,274 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfAddCounters [2023-02-13 23:17:55,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-02-13 23:17:55,274 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-02-13 23:17:55,274 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedDecrement [2023-02-13 23:17:55,274 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedDecrement [2023-02-13 23:17:55,274 INFO L130 BoogieDeclarations]: Found specification of procedure IoWMIRegistrationControl [2023-02-13 23:17:55,274 INFO L138 BoogieDeclarations]: Found implementation of procedure IoWMIRegistrationControl [2023-02-13 23:17:55,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-13 23:17:55,275 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2023-02-13 23:17:55,275 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2023-02-13 23:17:55,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-02-13 23:17:55,275 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-02-13 23:17:55,275 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2023-02-13 23:17:55,275 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2023-02-13 23:17:55,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-13 23:17:55,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-13 23:17:55,276 INFO L130 BoogieDeclarations]: Found specification of procedure KeQuerySystemTime [2023-02-13 23:17:55,276 INFO L138 BoogieDeclarations]: Found implementation of procedure KeQuerySystemTime [2023-02-13 23:17:55,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-13 23:17:55,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-13 23:17:55,277 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2023-02-13 23:17:55,277 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2023-02-13 23:17:55,277 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-13 23:17:55,277 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfIrpCompletion [2023-02-13 23:17:55,277 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfIrpCompletion [2023-02-13 23:17:55,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-13 23:17:55,277 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfLogError [2023-02-13 23:17:55,278 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfLogError [2023-02-13 23:17:55,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-13 23:17:55,278 INFO L130 BoogieDeclarations]: Found specification of procedure KeQueryPerformanceCounter [2023-02-13 23:17:55,278 INFO L138 BoogieDeclarations]: Found implementation of procedure KeQueryPerformanceCounter [2023-02-13 23:17:55,278 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedIncrement [2023-02-13 23:17:55,278 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedIncrement [2023-02-13 23:17:55,278 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2023-02-13 23:17:55,279 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2023-02-13 23:17:55,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2023-02-13 23:17:55,279 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2023-02-13 23:17:55,279 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfForwardIrpSynchronous [2023-02-13 23:17:55,279 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfForwardIrpSynchronous [2023-02-13 23:17:55,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-13 23:17:55,280 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfIoCompletion [2023-02-13 23:17:55,280 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfIoCompletion [2023-02-13 23:17:55,281 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_guard [2023-02-13 23:17:55,281 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_guard [2023-02-13 23:17:55,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-02-13 23:17:55,281 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2023-02-13 23:17:55,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2023-02-13 23:17:55,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-13 23:17:55,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-13 23:17:55,886 INFO L235 CfgBuilder]: Building ICFG [2023-02-13 23:17:55,888 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-13 23:17:56,110 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-13 23:17:56,126 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2023-02-13 23:17:56,126 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2023-02-13 23:17:56,186 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-13 23:17:56,195 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-02-13 23:17:56,195 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-02-13 23:17:56,422 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-13 23:17:56,439 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2023-02-13 23:17:56,439 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2023-02-13 23:17:56,537 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-13 23:17:56,538 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-13 23:17:56,542 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-13 23:18:30,109 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##61: assume false; [2023-02-13 23:18:30,109 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##62: assume !false; [2023-02-13 23:18:30,109 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##129: assume !false; [2023-02-13 23:18:30,109 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##128: assume false; [2023-02-13 23:18:30,109 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##35: assume !false; [2023-02-13 23:18:30,109 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##34: assume false; [2023-02-13 23:18:30,126 INFO L276 CfgBuilder]: Performing block encoding [2023-02-13 23:18:30,147 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-13 23:18:30,148 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-13 23:18:30,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 11:18:30 BoogieIcfgContainer [2023-02-13 23:18:30,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-13 23:18:30,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-13 23:18:30,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-13 23:18:30,152 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-13 23:18:30,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.02 11:17:53" (1/3) ... [2023-02-13 23:18:30,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dff6473 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 11:18:30, skipping insertion in model container [2023-02-13 23:18:30,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:17:54" (2/3) ... [2023-02-13 23:18:30,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dff6473 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 11:18:30, skipping insertion in model container [2023-02-13 23:18:30,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 11:18:30" (3/3) ... [2023-02-13 23:18:30,154 INFO L112 eAbstractionObserver]: Analyzing ICFG diskperf.i.cil-1.c [2023-02-13 23:18:30,164 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-13 23:18:30,164 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-13 23:18:30,204 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-13 23:18:30,208 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;@74a99283, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-13 23:18:30,208 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-13 23:18:30,214 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) [2023-02-13 23:18:30,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-13 23:18:30,219 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:18:30,219 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:18:30,220 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:18:30,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:18:30,224 INFO L85 PathProgramCache]: Analyzing trace with hash 2013573229, now seen corresponding path program 1 times [2023-02-13 23:18:30,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:18:30,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985157936] [2023-02-13 23:18:30,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:18:30,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:18:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:18:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:18:31,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:18:31,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985157936] [2023-02-13 23:18:31,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985157936] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:18:31,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:18:31,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-13 23:18:31,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868579129] [2023-02-13 23:18:31,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:18:31,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-13 23:18:31,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:18:31,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-13 23:18:31,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-13 23:18:31,345 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) [2023-02-13 23:18:31,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:18:31,417 INFO L93 Difference]: Finished difference Result 750 states and 1130 transitions. [2023-02-13 23:18:31,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-13 23:18:31,419 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 [2023-02-13 23:18:31,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:18:31,434 INFO L225 Difference]: With dead ends: 750 [2023-02-13 23:18:31,434 INFO L226 Difference]: Without dead ends: 371 [2023-02-13 23:18:31,440 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 [2023-02-13 23:18:31,442 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 [2023-02-13 23:18:31,443 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] [2023-02-13 23:18:31,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2023-02-13 23:18:31,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2023-02-13 23:18:31,501 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) [2023-02-13 23:18:31,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 512 transitions. [2023-02-13 23:18:31,506 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 512 transitions. Word has length 17 [2023-02-13 23:18:31,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:18:31,506 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 512 transitions. [2023-02-13 23:18:31,506 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) [2023-02-13 23:18:31,507 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 512 transitions. [2023-02-13 23:18:31,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-13 23:18:31,507 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:18:31,507 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:18:31,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-13 23:18:31,508 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:18:31,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:18:31,508 INFO L85 PathProgramCache]: Analyzing trace with hash -6791183, now seen corresponding path program 1 times [2023-02-13 23:18:31,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:18:31,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582175319] [2023-02-13 23:18:31,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:18:31,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:18:31,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:18:32,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:18:32,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:18:32,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582175319] [2023-02-13 23:18:32,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582175319] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:18:32,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:18:32,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-13 23:18:32,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216572439] [2023-02-13 23:18:32,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:18:32,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-13 23:18:32,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:18:32,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-13 23:18:32,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-13 23:18:32,966 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) [2023-02-13 23:18:33,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:18:33,119 INFO L93 Difference]: Finished difference Result 744 states and 1027 transitions. [2023-02-13 23:18:33,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-13 23:18:33,124 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 [2023-02-13 23:18:33,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:18:33,126 INFO L225 Difference]: With dead ends: 744 [2023-02-13 23:18:33,127 INFO L226 Difference]: Without dead ends: 377 [2023-02-13 23:18:33,129 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 [2023-02-13 23:18:33,130 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 [2023-02-13 23:18:33,131 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] [2023-02-13 23:18:33,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2023-02-13 23:18:33,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 375. [2023-02-13 23:18:33,146 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) [2023-02-13 23:18:33,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 516 transitions. [2023-02-13 23:18:33,150 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 516 transitions. Word has length 19 [2023-02-13 23:18:33,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:18:33,150 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 516 transitions. [2023-02-13 23:18:33,150 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) [2023-02-13 23:18:33,150 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 516 transitions. [2023-02-13 23:18:33,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-13 23:18:33,152 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:18:33,152 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] [2023-02-13 23:18:33,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-13 23:18:33,152 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:18:33,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:18:33,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1840508881, now seen corresponding path program 1 times [2023-02-13 23:18:33,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:18:33,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810561843] [2023-02-13 23:18:33,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:18:33,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:18:34,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:18:34,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 23:18:34,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:18:34,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810561843] [2023-02-13 23:18:34,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810561843] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:18:34,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:18:34,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-13 23:18:34,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411139827] [2023-02-13 23:18:34,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:18:34,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-13 23:18:34,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:18:34,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-13 23:18:34,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 23:18:34,856 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) [2023-02-13 23:18:35,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:18:35,034 INFO L93 Difference]: Finished difference Result 395 states and 542 transitions. [2023-02-13 23:18:35,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-13 23:18:35,038 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 [2023-02-13 23:18:35,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:18:35,039 INFO L225 Difference]: With dead ends: 395 [2023-02-13 23:18:35,040 INFO L226 Difference]: Without dead ends: 375 [2023-02-13 23:18:35,040 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 [2023-02-13 23:18:35,041 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, 0.2s IncrementalHoareTripleChecker+Time [2023-02-13 23:18:35,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 965 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-13 23:18:35,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2023-02-13 23:18:35,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 375. [2023-02-13 23:18:35,058 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) [2023-02-13 23:18:35,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 515 transitions. [2023-02-13 23:18:35,074 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 515 transitions. Word has length 23 [2023-02-13 23:18:35,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:18:35,075 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 515 transitions. [2023-02-13 23:18:35,075 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) [2023-02-13 23:18:35,075 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 515 transitions. [2023-02-13 23:18:35,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-13 23:18:35,075 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:18:35,075 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] [2023-02-13 23:18:35,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-13 23:18:35,076 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:18:35,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:18:35,076 INFO L85 PathProgramCache]: Analyzing trace with hash 2125296181, now seen corresponding path program 1 times [2023-02-13 23:18:35,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:18:35,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447640870] [2023-02-13 23:18:35,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:18:35,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:18:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:18:37,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 23:18:37,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:18:37,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447640870] [2023-02-13 23:18:37,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447640870] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:18:37,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:18:37,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-13 23:18:37,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026361486] [2023-02-13 23:18:37,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:18:37,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-13 23:18:37,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:18:37,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-13 23:18:37,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 23:18:37,023 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) [2023-02-13 23:18:39,105 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 [] [2023-02-13 23:18:39,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:18:39,356 INFO L93 Difference]: Finished difference Result 869 states and 1216 transitions. [2023-02-13 23:18:39,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-13 23:18:39,357 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 [2023-02-13 23:18:39,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:18:39,361 INFO L225 Difference]: With dead ends: 869 [2023-02-13 23:18:39,361 INFO L226 Difference]: Without dead ends: 614 [2023-02-13 23:18:39,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 23:18:39,362 INFO L413 NwaCegarLoop]: 715 mSDtfsCounter, 431 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s 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, 2.3s IncrementalHoareTripleChecker+Time [2023-02-13 23:18:39,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 1066 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 75 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2023-02-13 23:18:39,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2023-02-13 23:18:39,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 594. [2023-02-13 23:18:39,393 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) [2023-02-13 23:18:39,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 830 transitions. [2023-02-13 23:18:39,398 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 830 transitions. Word has length 25 [2023-02-13 23:18:39,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:18:39,399 INFO L495 AbstractCegarLoop]: Abstraction has 594 states and 830 transitions. [2023-02-13 23:18:39,399 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) [2023-02-13 23:18:39,400 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 830 transitions. [2023-02-13 23:18:39,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-13 23:18:39,403 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:18:39,403 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] [2023-02-13 23:18:39,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-13 23:18:39,403 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:18:39,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:18:39,404 INFO L85 PathProgramCache]: Analyzing trace with hash -642930051, now seen corresponding path program 1 times [2023-02-13 23:18:39,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:18:39,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317685985] [2023-02-13 23:18:39,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:18:39,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:18:40,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:18:41,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 23:18:41,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:18:41,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317685985] [2023-02-13 23:18:41,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317685985] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:18:41,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:18:41,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-13 23:18:41,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327778007] [2023-02-13 23:18:41,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:18:41,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-13 23:18:41,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:18:41,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-13 23:18:41,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 23:18:41,785 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) [2023-02-13 23:18:41,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:18:41,901 INFO L93 Difference]: Finished difference Result 1408 states and 2008 transitions. [2023-02-13 23:18:41,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-13 23:18:41,902 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 [2023-02-13 23:18:41,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:18:41,914 INFO L225 Difference]: With dead ends: 1408 [2023-02-13 23:18:41,915 INFO L226 Difference]: Without dead ends: 945 [2023-02-13 23:18:41,917 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 [2023-02-13 23:18:41,917 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 [2023-02-13 23:18:41,918 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] [2023-02-13 23:18:41,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2023-02-13 23:18:41,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 915. [2023-02-13 23:18:41,949 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) [2023-02-13 23:18:41,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1302 transitions. [2023-02-13 23:18:41,956 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1302 transitions. Word has length 33 [2023-02-13 23:18:41,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:18:41,956 INFO L495 AbstractCegarLoop]: Abstraction has 915 states and 1302 transitions. [2023-02-13 23:18:41,956 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) [2023-02-13 23:18:41,956 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1302 transitions. [2023-02-13 23:18:41,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-13 23:18:41,960 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:18:41,960 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] [2023-02-13 23:18:41,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-13 23:18:41,961 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:18:41,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:18:41,961 INFO L85 PathProgramCache]: Analyzing trace with hash 401969732, now seen corresponding path program 1 times [2023-02-13 23:18:41,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:18:41,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983785974] [2023-02-13 23:18:41,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:18:41,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:18:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:18:43,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 23:18:43,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:18:43,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983785974] [2023-02-13 23:18:43,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983785974] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:18:43,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:18:43,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-13 23:18:43,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875553349] [2023-02-13 23:18:43,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:18:43,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-13 23:18:43,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:18:43,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-13 23:18:43,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 23:18:43,646 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) [2023-02-13 23:18:45,704 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 [] [2023-02-13 23:18:45,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:18:45,868 INFO L93 Difference]: Finished difference Result 929 states and 1321 transitions. [2023-02-13 23:18:45,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-13 23:18:45,869 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 [2023-02-13 23:18:45,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:18:45,872 INFO L225 Difference]: With dead ends: 929 [2023-02-13 23:18:45,872 INFO L226 Difference]: Without dead ends: 925 [2023-02-13 23:18:45,872 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 [2023-02-13 23:18:45,873 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 [2023-02-13 23:18:45,873 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] [2023-02-13 23:18:45,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2023-02-13 23:18:45,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 924. [2023-02-13 23:18:45,890 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) [2023-02-13 23:18:45,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1314 transitions. [2023-02-13 23:18:45,894 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1314 transitions. Word has length 33 [2023-02-13 23:18:45,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:18:45,894 INFO L495 AbstractCegarLoop]: Abstraction has 924 states and 1314 transitions. [2023-02-13 23:18:45,894 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) [2023-02-13 23:18:45,894 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1314 transitions. [2023-02-13 23:18:45,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-13 23:18:45,895 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:18:45,895 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] [2023-02-13 23:18:45,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-13 23:18:45,896 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:18:45,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:18:45,896 INFO L85 PathProgramCache]: Analyzing trace with hash 937185154, now seen corresponding path program 1 times [2023-02-13 23:18:45,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:18:45,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404611906] [2023-02-13 23:18:45,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:18:45,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:18:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:18:47,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-13 23:18:47,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:18:47,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 23:18:47,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:18:47,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404611906] [2023-02-13 23:18:47,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404611906] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:18:47,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:18:47,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-13 23:18:47,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713489603] [2023-02-13 23:18:47,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:18:47,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-13 23:18:47,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:18:47,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-13 23:18:47,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-13 23:18:47,970 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) [2023-02-13 23:18:50,084 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 [] [2023-02-13 23:18:52,221 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 [] [2023-02-13 23:18:55,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:18:55,173 INFO L93 Difference]: Finished difference Result 981 states and 1395 transitions. [2023-02-13 23:18:55,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-13 23:18:55,174 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 [2023-02-13 23:18:55,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:18:55,177 INFO L225 Difference]: With dead ends: 981 [2023-02-13 23:18:55,177 INFO L226 Difference]: Without dead ends: 970 [2023-02-13 23:18:55,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-13 23:18:55,178 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 653 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 133 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s 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, 6.9s IncrementalHoareTripleChecker+Time [2023-02-13 23:18:55,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [690 Valid, 980 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 769 Invalid, 2 Unknown, 0 Unchecked, 6.9s Time] [2023-02-13 23:18:55,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2023-02-13 23:18:55,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 948. [2023-02-13 23:18:55,205 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) [2023-02-13 23:18:55,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1352 transitions. [2023-02-13 23:18:55,213 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1352 transitions. Word has length 37 [2023-02-13 23:18:55,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:18:55,214 INFO L495 AbstractCegarLoop]: Abstraction has 948 states and 1352 transitions. [2023-02-13 23:18:55,214 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) [2023-02-13 23:18:55,214 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1352 transitions. [2023-02-13 23:18:55,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-13 23:18:55,216 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:18:55,216 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] [2023-02-13 23:18:55,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-13 23:18:55,217 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:18:55,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:18:55,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1448171803, now seen corresponding path program 1 times [2023-02-13 23:18:55,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:18:55,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359529411] [2023-02-13 23:18:55,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:18:55,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:18:56,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:18:57,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-13 23:18:57,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:18:57,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 23:18:57,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:18:57,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359529411] [2023-02-13 23:18:57,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359529411] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:18:57,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:18:57,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-13 23:18:57,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739287917] [2023-02-13 23:18:57,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:18:57,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-13 23:18:57,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:18:57,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-13 23:18:57,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-13 23:18:57,686 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) [2023-02-13 23:18:59,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:19:01,874 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 [] [2023-02-13 23:19:04,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:19:04,727 INFO L93 Difference]: Finished difference Result 972 states and 1380 transitions. [2023-02-13 23:19:04,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-13 23:19:04,739 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 [2023-02-13 23:19:04,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:19:04,742 INFO L225 Difference]: With dead ends: 972 [2023-02-13 23:19:04,742 INFO L226 Difference]: Without dead ends: 964 [2023-02-13 23:19:04,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-13 23:19:04,743 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 642 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 129 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s 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, 6.8s IncrementalHoareTripleChecker+Time [2023-02-13 23:19:04,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [679 Valid, 974 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 765 Invalid, 2 Unknown, 0 Unchecked, 6.8s Time] [2023-02-13 23:19:04,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2023-02-13 23:19:04,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 948. [2023-02-13 23:19:04,799 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) [2023-02-13 23:19:04,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1351 transitions. [2023-02-13 23:19:04,805 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1351 transitions. Word has length 38 [2023-02-13 23:19:04,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:19:04,806 INFO L495 AbstractCegarLoop]: Abstraction has 948 states and 1351 transitions. [2023-02-13 23:19:04,806 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) [2023-02-13 23:19:04,806 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1351 transitions. [2023-02-13 23:19:04,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-13 23:19:04,807 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:19:04,808 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] [2023-02-13 23:19:04,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-13 23:19:04,808 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:19:04,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:19:04,814 INFO L85 PathProgramCache]: Analyzing trace with hash 2084178201, now seen corresponding path program 1 times [2023-02-13 23:19:04,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:19:04,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857635672] [2023-02-13 23:19:04,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:19:04,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:19:05,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:19:06,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-13 23:19:06,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:19:06,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 23:19:06,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:19:06,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857635672] [2023-02-13 23:19:06,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857635672] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:19:06,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:19:06,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-13 23:19:06,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043799083] [2023-02-13 23:19:06,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:19:06,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-13 23:19:06,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:19:06,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-13 23:19:06,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-13 23:19:06,364 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) [2023-02-13 23:19:08,453 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 [] [2023-02-13 23:19:10,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:19:10,408 INFO L93 Difference]: Finished difference Result 1745 states and 2521 transitions. [2023-02-13 23:19:10,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-13 23:19:10,409 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 [2023-02-13 23:19:10,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:19:10,419 INFO L225 Difference]: With dead ends: 1745 [2023-02-13 23:19:10,420 INFO L226 Difference]: Without dead ends: 1716 [2023-02-13 23:19:10,420 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 [2023-02-13 23:19:10,423 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 686 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 126 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s 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, 3.9s IncrementalHoareTripleChecker+Time [2023-02-13 23:19:10,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 981 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 401 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2023-02-13 23:19:10,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2023-02-13 23:19:10,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1677. [2023-02-13 23:19:10,575 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) [2023-02-13 23:19:10,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 2426 transitions. [2023-02-13 23:19:10,582 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 2426 transitions. Word has length 39 [2023-02-13 23:19:10,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:19:10,582 INFO L495 AbstractCegarLoop]: Abstraction has 1677 states and 2426 transitions. [2023-02-13 23:19:10,583 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) [2023-02-13 23:19:10,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 2426 transitions. [2023-02-13 23:19:10,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-13 23:19:10,583 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:19:10,584 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] [2023-02-13 23:19:10,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-13 23:19:10,584 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:19:10,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:19:10,584 INFO L85 PathProgramCache]: Analyzing trace with hash 193456973, now seen corresponding path program 1 times [2023-02-13 23:19:10,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:19:10,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051859454] [2023-02-13 23:19:10,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:19:10,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:19:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:19:12,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-13 23:19:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:19:12,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 23:19:12,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:19:12,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051859454] [2023-02-13 23:19:12,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051859454] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:19:12,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:19:12,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-13 23:19:12,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737786822] [2023-02-13 23:19:12,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:19:12,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-13 23:19:12,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:19:12,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-13 23:19:12,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-13 23:19:12,402 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) [2023-02-13 23:19:14,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:19:16,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:19:18,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:19:18,957 INFO L93 Difference]: Finished difference Result 1710 states and 2471 transitions. [2023-02-13 23:19:18,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-13 23:19:18,958 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 [2023-02-13 23:19:18,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:19:18,964 INFO L225 Difference]: With dead ends: 1710 [2023-02-13 23:19:18,964 INFO L226 Difference]: Without dead ends: 1692 [2023-02-13 23:19:18,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-13 23:19:18,965 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 158 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 65 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s 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, 6.5s IncrementalHoareTripleChecker+Time [2023-02-13 23:19:18,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 1235 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 541 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2023-02-13 23:19:18,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2023-02-13 23:19:19,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1673. [2023-02-13 23:19:19,015 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) [2023-02-13 23:19:19,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 2420 transitions. [2023-02-13 23:19:19,021 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 2420 transitions. Word has length 40 [2023-02-13 23:19:19,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:19:19,022 INFO L495 AbstractCegarLoop]: Abstraction has 1673 states and 2420 transitions. [2023-02-13 23:19:19,022 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) [2023-02-13 23:19:19,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 2420 transitions. [2023-02-13 23:19:19,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-13 23:19:19,023 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:19:19,023 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] [2023-02-13 23:19:19,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-13 23:19:19,023 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:19:19,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:19:19,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1037165454, now seen corresponding path program 1 times [2023-02-13 23:19:19,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:19:19,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491678125] [2023-02-13 23:19:19,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:19:19,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:19:20,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:19:20,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-13 23:19:20,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:19:20,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 23:19:20,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:19:20,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491678125] [2023-02-13 23:19:20,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491678125] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:19:20,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:19:20,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-13 23:19:20,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761464698] [2023-02-13 23:19:20,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:19:20,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-13 23:19:20,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:19:20,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-13 23:19:20,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-13 23:19:20,887 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) [2023-02-13 23:19:22,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:19:25,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:19:27,049 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 [] [2023-02-13 23:19:30,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:19:30,229 INFO L93 Difference]: Finished difference Result 2633 states and 4035 transitions. [2023-02-13 23:19:30,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-13 23:19:30,230 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 [2023-02-13 23:19:30,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:19:30,241 INFO L225 Difference]: With dead ends: 2633 [2023-02-13 23:19:30,241 INFO L226 Difference]: Without dead ends: 2625 [2023-02-13 23:19:30,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-13 23:19:30,244 INFO L413 NwaCegarLoop]: 523 mSDtfsCounter, 437 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 125 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s 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, 9.1s IncrementalHoareTripleChecker+Time [2023-02-13 23:19:30,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 1031 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 690 Invalid, 3 Unknown, 0 Unchecked, 9.1s Time] [2023-02-13 23:19:30,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2023-02-13 23:19:30,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 1815. [2023-02-13 23:19:30,339 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) [2023-02-13 23:19:30,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 2637 transitions. [2023-02-13 23:19:30,346 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 2637 transitions. Word has length 43 [2023-02-13 23:19:30,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:19:30,346 INFO L495 AbstractCegarLoop]: Abstraction has 1815 states and 2637 transitions. [2023-02-13 23:19:30,347 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) [2023-02-13 23:19:30,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 2637 transitions. [2023-02-13 23:19:30,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-13 23:19:30,348 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:19:30,348 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] [2023-02-13 23:19:30,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-13 23:19:30,348 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:19:30,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:19:30,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1937989103, now seen corresponding path program 1 times [2023-02-13 23:19:30,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:19:30,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048223045] [2023-02-13 23:19:30,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:19:30,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:19:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:19:32,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-13 23:19:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:19:32,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 23:19:32,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:19:32,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048223045] [2023-02-13 23:19:32,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048223045] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:19:32,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:19:32,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-13 23:19:32,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339882361] [2023-02-13 23:19:32,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:19:32,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-13 23:19:32,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:19:32,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-13 23:19:32,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-13 23:19:32,845 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) [2023-02-13 23:19:34,917 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 [] [2023-02-13 23:19:37,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:19:40,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:19:40,170 INFO L93 Difference]: Finished difference Result 1864 states and 2700 transitions. [2023-02-13 23:19:40,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-13 23:19:40,171 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 [2023-02-13 23:19:40,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:19:40,177 INFO L225 Difference]: With dead ends: 1864 [2023-02-13 23:19:40,177 INFO L226 Difference]: Without dead ends: 1832 [2023-02-13 23:19:40,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-02-13 23:19:40,178 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 171 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 66 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s 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, 7.1s IncrementalHoareTripleChecker+Time [2023-02-13 23:19:40,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 1552 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 728 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2023-02-13 23:19:40,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2023-02-13 23:19:40,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1813. [2023-02-13 23:19:40,250 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) [2023-02-13 23:19:40,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 2632 transitions. [2023-02-13 23:19:40,255 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 2632 transitions. Word has length 44 [2023-02-13 23:19:40,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:19:40,256 INFO L495 AbstractCegarLoop]: Abstraction has 1813 states and 2632 transitions. [2023-02-13 23:19:40,257 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) [2023-02-13 23:19:40,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 2632 transitions. [2023-02-13 23:19:40,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-13 23:19:40,258 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:19:40,259 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] [2023-02-13 23:19:40,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-13 23:19:40,259 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:19:40,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:19:40,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1633946811, now seen corresponding path program 1 times [2023-02-13 23:19:40,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:19:40,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26218995] [2023-02-13 23:19:40,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:19:40,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:19:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:19:42,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-13 23:19:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:19:42,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 23:19:42,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:19:42,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26218995] [2023-02-13 23:19:42,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26218995] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:19:42,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:19:42,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-13 23:19:42,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124241088] [2023-02-13 23:19:42,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:19:42,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-13 23:19:42,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:19:42,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-13 23:19:42,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-13 23:19:42,849 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) [2023-02-13 23:19:44,957 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 [] [2023-02-13 23:19:47,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:19:49,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:19:54,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:19:54,010 INFO L93 Difference]: Finished difference Result 2635 states and 4032 transitions. [2023-02-13 23:19:54,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-13 23:19:54,010 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 [2023-02-13 23:19:54,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:19:54,019 INFO L225 Difference]: With dead ends: 2635 [2023-02-13 23:19:54,019 INFO L226 Difference]: Without dead ends: 2627 [2023-02-13 23:19:54,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-13 23:19:54,021 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 1224 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 425 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s 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, 10.6s IncrementalHoareTripleChecker+Time [2023-02-13 23:19:54,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1253 Valid, 1133 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 1067 Invalid, 3 Unknown, 0 Unchecked, 10.6s Time] [2023-02-13 23:19:54,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2627 states. [2023-02-13 23:19:54,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2627 to 1813. [2023-02-13 23:19:54,112 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) [2023-02-13 23:19:54,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 2631 transitions. [2023-02-13 23:19:54,117 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 2631 transitions. Word has length 44 [2023-02-13 23:19:54,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:19:54,117 INFO L495 AbstractCegarLoop]: Abstraction has 1813 states and 2631 transitions. [2023-02-13 23:19:54,117 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) [2023-02-13 23:19:54,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 2631 transitions. [2023-02-13 23:19:54,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-13 23:19:54,118 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:19:54,118 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] [2023-02-13 23:19:54,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-13 23:19:54,118 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:19:54,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:19:54,118 INFO L85 PathProgramCache]: Analyzing trace with hash -9767716, now seen corresponding path program 1 times [2023-02-13 23:19:54,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:19:54,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170695229] [2023-02-13 23:19:54,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:19:54,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:19:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:19:56,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-13 23:19:56,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:19:56,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 23:19:56,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:19:56,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170695229] [2023-02-13 23:19:56,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170695229] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:19:56,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:19:56,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-13 23:19:56,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613017821] [2023-02-13 23:19:56,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:19:56,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-13 23:19:56,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:19:56,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-13 23:19:56,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-13 23:19:56,553 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) [2023-02-13 23:19:58,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:20:00,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:20:02,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:20:04,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:20:06,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:20:08,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:20:10,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:20:13,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:20:17,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:20:17,572 INFO L93 Difference]: Finished difference Result 1982 states and 2970 transitions. [2023-02-13 23:20:17,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-13 23:20:17,573 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 [2023-02-13 23:20:17,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:20:17,580 INFO L225 Difference]: With dead ends: 1982 [2023-02-13 23:20:17,581 INFO L226 Difference]: Without dead ends: 1978 [2023-02-13 23:20:17,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-13 23:20:17,582 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 91 mSDsluCounter, 1926 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 75 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s 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, 20.8s IncrementalHoareTripleChecker+Time [2023-02-13 23:20:17,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 2351 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1099 Invalid, 8 Unknown, 0 Unchecked, 20.8s Time] [2023-02-13 23:20:17,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2023-02-13 23:20:17,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1820. [2023-02-13 23:20:17,664 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) [2023-02-13 23:20:17,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 2639 transitions. [2023-02-13 23:20:17,669 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 2639 transitions. Word has length 45 [2023-02-13 23:20:17,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:20:17,669 INFO L495 AbstractCegarLoop]: Abstraction has 1820 states and 2639 transitions. [2023-02-13 23:20:17,669 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) [2023-02-13 23:20:17,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 2639 transitions. [2023-02-13 23:20:17,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-13 23:20:17,670 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:20:17,670 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] [2023-02-13 23:20:17,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-13 23:20:17,670 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:20:17,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:20:17,671 INFO L85 PathProgramCache]: Analyzing trace with hash -10044546, now seen corresponding path program 1 times [2023-02-13 23:20:17,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:20:17,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33796878] [2023-02-13 23:20:17,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:20:17,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:20:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:20:19,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-13 23:20:19,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:20:19,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 23:20:19,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:20:19,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33796878] [2023-02-13 23:20:19,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33796878] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:20:19,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:20:19,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-13 23:20:19,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605770784] [2023-02-13 23:20:19,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:20:19,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-13 23:20:19,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:20:19,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-13 23:20:19,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-13 23:20:19,606 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) [2023-02-13 23:20:21,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:20:23,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:20:25,809 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 [] [2023-02-13 23:20:30,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:20:30,974 INFO L93 Difference]: Finished difference Result 2636 states and 4032 transitions. [2023-02-13 23:20:30,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-13 23:20:30,974 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 [2023-02-13 23:20:30,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:20:30,984 INFO L225 Difference]: With dead ends: 2636 [2023-02-13 23:20:30,984 INFO L226 Difference]: Without dead ends: 2620 [2023-02-13 23:20:30,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-13 23:20:30,986 INFO L413 NwaCegarLoop]: 494 mSDtfsCounter, 1208 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 424 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s 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, 10.7s IncrementalHoareTripleChecker+Time [2023-02-13 23:20:30,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1238 Valid, 1130 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 1064 Invalid, 3 Unknown, 0 Unchecked, 10.7s Time] [2023-02-13 23:20:30,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2620 states. [2023-02-13 23:20:31,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2620 to 1812. [2023-02-13 23:20:31,082 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) [2023-02-13 23:20:31,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 2628 transitions. [2023-02-13 23:20:31,087 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 2628 transitions. Word has length 45 [2023-02-13 23:20:31,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:20:31,088 INFO L495 AbstractCegarLoop]: Abstraction has 1812 states and 2628 transitions. [2023-02-13 23:20:31,088 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) [2023-02-13 23:20:31,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 2628 transitions. [2023-02-13 23:20:31,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-13 23:20:31,089 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:20:31,089 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] [2023-02-13 23:20:31,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-13 23:20:31,089 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:20:31,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:20:31,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1045402083, now seen corresponding path program 1 times [2023-02-13 23:20:31,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:20:31,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822981956] [2023-02-13 23:20:31,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:20:31,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:20:32,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:20:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 23:20:33,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:20:33,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822981956] [2023-02-13 23:20:33,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822981956] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:20:33,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:20:33,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-13 23:20:33,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671568777] [2023-02-13 23:20:33,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:20:33,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-13 23:20:33,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:20:33,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-13 23:20:33,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-13 23:20:33,093 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) [2023-02-13 23:20:33,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:20:33,991 INFO L93 Difference]: Finished difference Result 1839 states and 2653 transitions. [2023-02-13 23:20:33,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-13 23:20:33,991 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 [2023-02-13 23:20:33,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:20:33,997 INFO L225 Difference]: With dead ends: 1839 [2023-02-13 23:20:33,997 INFO L226 Difference]: Without dead ends: 1815 [2023-02-13 23:20:33,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-13 23:20:33,999 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 482 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2023-02-13 23:20:33,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 752 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-13 23:20:34,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2023-02-13 23:20:34,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1804. [2023-02-13 23:20:34,093 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) [2023-02-13 23:20:34,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 2617 transitions. [2023-02-13 23:20:34,098 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 2617 transitions. Word has length 44 [2023-02-13 23:20:34,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:20:34,098 INFO L495 AbstractCegarLoop]: Abstraction has 1804 states and 2617 transitions. [2023-02-13 23:20:34,098 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) [2023-02-13 23:20:34,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 2617 transitions. [2023-02-13 23:20:34,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-13 23:20:34,099 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:20:34,099 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] [2023-02-13 23:20:34,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-13 23:20:34,099 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:20:34,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:20:34,099 INFO L85 PathProgramCache]: Analyzing trace with hash 470915374, now seen corresponding path program 1 times [2023-02-13 23:20:34,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:20:34,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430641254] [2023-02-13 23:20:34,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:20:34,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:20:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:20:36,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 23:20:36,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:20:36,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430641254] [2023-02-13 23:20:36,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430641254] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:20:36,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:20:36,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-13 23:20:36,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915776343] [2023-02-13 23:20:36,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:20:36,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-13 23:20:36,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:20:36,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-13 23:20:36,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-13 23:20:36,304 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) [2023-02-13 23:20:37,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:20:37,169 INFO L93 Difference]: Finished difference Result 1842 states and 2658 transitions. [2023-02-13 23:20:37,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-13 23:20:37,170 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 [2023-02-13 23:20:37,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:20:37,176 INFO L225 Difference]: With dead ends: 1842 [2023-02-13 23:20:37,176 INFO L226 Difference]: Without dead ends: 1805 [2023-02-13 23:20:37,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-13 23:20:37,178 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 467 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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 [2023-02-13 23:20:37,178 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] [2023-02-13 23:20:37,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2023-02-13 23:20:37,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1803. [2023-02-13 23:20:37,283 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) [2023-02-13 23:20:37,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 2612 transitions. [2023-02-13 23:20:37,288 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 2612 transitions. Word has length 44 [2023-02-13 23:20:37,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:20:37,288 INFO L495 AbstractCegarLoop]: Abstraction has 1803 states and 2612 transitions. [2023-02-13 23:20:37,288 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) [2023-02-13 23:20:37,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 2612 transitions. [2023-02-13 23:20:37,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-13 23:20:37,289 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:20:37,289 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] [2023-02-13 23:20:37,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-13 23:20:37,290 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:20:37,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:20:37,290 INFO L85 PathProgramCache]: Analyzing trace with hash -103073746, now seen corresponding path program 1 times [2023-02-13 23:20:37,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:20:37,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736132630] [2023-02-13 23:20:37,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:20:37,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:20:38,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:20:38,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 23:20:38,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:20:38,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736132630] [2023-02-13 23:20:38,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736132630] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:20:38,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:20:38,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-13 23:20:38,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899887863] [2023-02-13 23:20:38,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:20:38,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-13 23:20:38,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:20:38,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-13 23:20:38,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 23:20:38,906 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) [2023-02-13 23:20:40,966 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 [] [2023-02-13 23:20:41,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:20:41,353 INFO L93 Difference]: Finished difference Result 2542 states and 3790 transitions. [2023-02-13 23:20:41,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-13 23:20:41,354 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 [2023-02-13 23:20:41,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:20:41,363 INFO L225 Difference]: With dead ends: 2542 [2023-02-13 23:20:41,363 INFO L226 Difference]: Without dead ends: 2529 [2023-02-13 23:20:41,365 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 [2023-02-13 23:20:41,365 INFO L413 NwaCegarLoop]: 759 mSDtfsCounter, 321 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-02-13 23:20:41,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 1170 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2023-02-13 23:20:41,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2023-02-13 23:20:41,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 1803. [2023-02-13 23:20:41,597 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) [2023-02-13 23:20:41,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 2616 transitions. [2023-02-13 23:20:41,603 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 2616 transitions. Word has length 44 [2023-02-13 23:20:41,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:20:41,603 INFO L495 AbstractCegarLoop]: Abstraction has 1803 states and 2616 transitions. [2023-02-13 23:20:41,603 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) [2023-02-13 23:20:41,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 2616 transitions. [2023-02-13 23:20:41,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-13 23:20:41,605 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:20:41,605 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] [2023-02-13 23:20:41,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-13 23:20:41,605 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:20:41,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:20:41,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1553092361, now seen corresponding path program 1 times [2023-02-13 23:20:41,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:20:41,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870684083] [2023-02-13 23:20:41,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:20:41,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:20:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:20:43,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 23:20:43,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:20:43,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870684083] [2023-02-13 23:20:43,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870684083] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:20:43,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:20:43,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-13 23:20:43,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754139430] [2023-02-13 23:20:43,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:20:43,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-13 23:20:43,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:20:43,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-13 23:20:43,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-13 23:20:43,941 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) [2023-02-13 23:20:46,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:20:48,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:20:50,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:20:52,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:20:54,213 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 [] [2023-02-13 23:20:54,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:20:54,583 INFO L93 Difference]: Finished difference Result 1817 states and 2631 transitions. [2023-02-13 23:20:54,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-13 23:20:54,584 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 [2023-02-13 23:20:54,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:20:54,589 INFO L225 Difference]: With dead ends: 1817 [2023-02-13 23:20:54,589 INFO L226 Difference]: Without dead ends: 1813 [2023-02-13 23:20:54,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-13 23:20:54,590 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 [2023-02-13 23:20:54,590 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] [2023-02-13 23:20:54,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2023-02-13 23:20:54,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 1809. [2023-02-13 23:20:54,685 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) [2023-02-13 23:20:54,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 2623 transitions. [2023-02-13 23:20:54,690 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 2623 transitions. Word has length 45 [2023-02-13 23:20:54,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:20:54,690 INFO L495 AbstractCegarLoop]: Abstraction has 1809 states and 2623 transitions. [2023-02-13 23:20:54,690 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) [2023-02-13 23:20:54,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 2623 transitions. [2023-02-13 23:20:54,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-13 23:20:54,691 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:20:54,691 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] [2023-02-13 23:20:54,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-13 23:20:54,691 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:20:54,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:20:54,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1552815531, now seen corresponding path program 1 times [2023-02-13 23:20:54,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:20:54,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012218239] [2023-02-13 23:20:54,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:20:54,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:20:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:20:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 23:20:56,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:20:56,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012218239] [2023-02-13 23:20:56,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012218239] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:20:56,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:20:56,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-13 23:20:56,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558267700] [2023-02-13 23:20:56,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:20:56,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-13 23:20:56,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:20:56,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-13 23:20:56,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-13 23:20:56,692 INFO L87 Difference]: Start difference. First operand 1809 states and 2623 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 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) [2023-02-13 23:20:57,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:20:57,907 INFO L93 Difference]: Finished difference Result 2537 states and 3783 transitions. [2023-02-13 23:20:57,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-13 23:20:57,908 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 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 [2023-02-13 23:20:57,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:20:57,915 INFO L225 Difference]: With dead ends: 2537 [2023-02-13 23:20:57,915 INFO L226 Difference]: Without dead ends: 2510 [2023-02-13 23:20:57,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-13 23:20:57,920 INFO L413 NwaCegarLoop]: 747 mSDtfsCounter, 665 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-13 23:20:57,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 1046 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-13 23:20:57,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2510 states. [2023-02-13 23:20:58,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2510 to 1786. [2023-02-13 23:20:58,032 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) [2023-02-13 23:20:58,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 2595 transitions. [2023-02-13 23:20:58,037 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 2595 transitions. Word has length 45 [2023-02-13 23:20:58,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:20:58,037 INFO L495 AbstractCegarLoop]: Abstraction has 1786 states and 2595 transitions. [2023-02-13 23:20:58,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 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) [2023-02-13 23:20:58,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 2595 transitions. [2023-02-13 23:20:58,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-13 23:20:58,038 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:20:58,038 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] [2023-02-13 23:20:58,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-13 23:20:58,038 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:20:58,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:20:58,039 INFO L85 PathProgramCache]: Analyzing trace with hash -974225584, now seen corresponding path program 1 times [2023-02-13 23:20:58,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:20:58,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153438333] [2023-02-13 23:20:58,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:20:58,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:20:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:21:00,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-13 23:21:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:21:00,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 23:21:00,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:21:00,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153438333] [2023-02-13 23:21:00,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153438333] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:21:00,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:21:00,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-13 23:21:00,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022670270] [2023-02-13 23:21:00,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:21:00,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-13 23:21:00,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:21:00,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-13 23:21:00,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-13 23:21:00,574 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) [2023-02-13 23:21:02,744 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 [] [2023-02-13 23:21:04,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:21:06,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:21:08,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:21:10,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:21:12,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:21:14,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:21:16,940 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 [] [2023-02-13 23:21:21,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:21:21,666 INFO L93 Difference]: Finished difference Result 1946 states and 2923 transitions. [2023-02-13 23:21:21,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-13 23:21:21,667 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 [2023-02-13 23:21:21,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:21:21,672 INFO L225 Difference]: With dead ends: 1946 [2023-02-13 23:21:21,672 INFO L226 Difference]: Without dead ends: 1927 [2023-02-13 23:21:21,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-13 23:21:21,674 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 87 mSDsluCounter, 1765 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 71 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.5s 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, 20.8s IncrementalHoareTripleChecker+Time [2023-02-13 23:21:21,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 2153 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1051 Invalid, 8 Unknown, 0 Unchecked, 20.8s Time] [2023-02-13 23:21:21,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1927 states. [2023-02-13 23:21:21,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1927 to 1773. [2023-02-13 23:21:21,773 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) [2023-02-13 23:21:21,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1773 states to 1773 states and 2579 transitions. [2023-02-13 23:21:21,778 INFO L78 Accepts]: Start accepts. Automaton has 1773 states and 2579 transitions. Word has length 47 [2023-02-13 23:21:21,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:21:21,778 INFO L495 AbstractCegarLoop]: Abstraction has 1773 states and 2579 transitions. [2023-02-13 23:21:21,778 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) [2023-02-13 23:21:21,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1773 states and 2579 transitions. [2023-02-13 23:21:21,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-13 23:21:21,779 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:21:21,779 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] [2023-02-13 23:21:21,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-13 23:21:21,780 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:21:21,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:21:21,780 INFO L85 PathProgramCache]: Analyzing trace with hash 571500937, now seen corresponding path program 1 times [2023-02-13 23:21:21,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:21:21,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250647949] [2023-02-13 23:21:21,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:21:21,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:21:23,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:21:24,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-13 23:21:24,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:21:24,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-13 23:21:24,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:21:25,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 23:21:25,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:21:25,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250647949] [2023-02-13 23:21:25,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250647949] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:21:25,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:21:25,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-13 23:21:25,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116153442] [2023-02-13 23:21:25,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:21:25,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-13 23:21:25,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:21:25,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-13 23:21:25,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-02-13 23:21:25,055 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) [2023-02-13 23:21:27,330 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 [] [2023-02-13 23:21:29,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:21:31,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:21:33,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:21:35,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:21:37,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:21:39,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:21:41,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:21:43,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:21:45,465 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 [] [2023-02-13 23:21:52,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:21:52,092 INFO L93 Difference]: Finished difference Result 1929 states and 2903 transitions. [2023-02-13 23:21:52,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-13 23:21:52,095 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 [2023-02-13 23:21:52,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:21:52,100 INFO L225 Difference]: With dead ends: 1929 [2023-02-13 23:21:52,100 INFO L226 Difference]: Without dead ends: 1897 [2023-02-13 23:21:52,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-13 23:21:52,102 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 86 mSDsluCounter, 2332 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 68 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.3s 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, 26.7s IncrementalHoareTripleChecker+Time [2023-02-13 23:21:52,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 2707 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1344 Invalid, 10 Unknown, 0 Unchecked, 26.7s Time] [2023-02-13 23:21:52,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1897 states. [2023-02-13 23:21:52,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1897 to 1740. [2023-02-13 23:21:52,304 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) [2023-02-13 23:21:52,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1740 states to 1740 states and 2534 transitions. [2023-02-13 23:21:52,308 INFO L78 Accepts]: Start accepts. Automaton has 1740 states and 2534 transitions. Word has length 55 [2023-02-13 23:21:52,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:21:52,308 INFO L495 AbstractCegarLoop]: Abstraction has 1740 states and 2534 transitions. [2023-02-13 23:21:52,309 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) [2023-02-13 23:21:52,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1740 states and 2534 transitions. [2023-02-13 23:21:52,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-13 23:21:52,309 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:21:52,310 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] [2023-02-13 23:21:52,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-13 23:21:52,310 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:21:52,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:21:52,310 INFO L85 PathProgramCache]: Analyzing trace with hash -594664819, now seen corresponding path program 1 times [2023-02-13 23:21:52,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:21:52,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281762227] [2023-02-13 23:21:52,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:21:52,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:21:53,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:21:54,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-13 23:21:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:21:54,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-13 23:21:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:21:54,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-02-13 23:21:54,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:21:54,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 23:21:54,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:21:54,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281762227] [2023-02-13 23:21:54,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281762227] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:21:54,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:21:54,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-13 23:21:54,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829580828] [2023-02-13 23:21:54,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:21:54,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-13 23:21:54,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:21:54,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-13 23:21:54,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-13 23:21:54,436 INFO L87 Difference]: Start difference. First operand 1740 states and 2534 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-13 23:21:56,527 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 [] [2023-02-13 23:21:58,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:22:00,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:22:03,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:22:03,955 INFO L93 Difference]: Finished difference Result 1992 states and 2963 transitions. [2023-02-13 23:22:03,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-13 23:22:03,956 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2023-02-13 23:22:03,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:22:03,959 INFO L225 Difference]: With dead ends: 1992 [2023-02-13 23:22:03,959 INFO L226 Difference]: Without dead ends: 1190 [2023-02-13 23:22:03,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-02-13 23:22:03,962 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 707 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 157 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2023-02-13 23:22:03,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [751 Valid, 800 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 626 Invalid, 3 Unknown, 0 Unchecked, 9.1s Time] [2023-02-13 23:22:03,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2023-02-13 23:22:04,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1036. [2023-02-13 23:22:04,023 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) [2023-02-13 23:22:04,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 1474 transitions. [2023-02-13 23:22:04,026 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 1474 transitions. Word has length 59 [2023-02-13 23:22:04,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:22:04,026 INFO L495 AbstractCegarLoop]: Abstraction has 1036 states and 1474 transitions. [2023-02-13 23:22:04,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-13 23:22:04,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 1474 transitions. [2023-02-13 23:22:04,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-13 23:22:04,028 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:22:04,028 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] [2023-02-13 23:22:04,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-13 23:22:04,028 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:22:04,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:22:04,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1400087629, now seen corresponding path program 1 times [2023-02-13 23:22:04,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:22:04,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790227419] [2023-02-13 23:22:04,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:22:04,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:22:05,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:22:05,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-13 23:22:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:22:05,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-13 23:22:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:22:05,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-02-13 23:22:05,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:22:05,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-13 23:22:05,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:22:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 23:22:05,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:22:05,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790227419] [2023-02-13 23:22:05,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790227419] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:22:05,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:22:05,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-13 23:22:05,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886816960] [2023-02-13 23:22:05,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:22:05,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-13 23:22:05,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:22:05,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-13 23:22:05,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-13 23:22:05,861 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) [2023-02-13 23:22:07,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:22:10,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-13 23:22:12,126 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 []