./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ntdrivers/floppy.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ntdrivers/floppy.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 986945cc1d8674c803a19893f7d2aec71de46e5693e78eba56c7bdad24c6e341 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 11:11:01,087 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 11:11:01,088 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 11:11:01,138 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 11:11:01,139 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 11:11:01,140 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 11:11:01,141 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 11:11:01,142 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 11:11:01,143 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 11:11:01,144 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 11:11:01,145 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 11:11:01,146 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 11:11:01,146 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 11:11:01,147 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 11:11:01,148 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 11:11:01,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 11:11:01,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 11:11:01,150 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 11:11:01,151 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 11:11:01,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 11:11:01,154 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 11:11:01,155 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 11:11:01,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 11:11:01,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 11:11:01,157 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 11:11:01,160 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 11:11:01,160 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 11:11:01,160 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 11:11:01,161 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 11:11:01,162 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 11:11:01,162 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 11:11:01,163 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 11:11:01,163 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 11:11:01,164 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 11:11:01,165 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 11:11:01,166 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 11:11:01,166 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 11:11:01,166 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 11:11:01,167 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 11:11:01,167 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 11:11:01,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 11:11:01,168 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 11:11:01,169 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 11:11:01,187 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 11:11:01,187 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 11:11:01,188 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 11:11:01,188 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 11:11:01,188 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 11:11:01,189 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 11:11:01,189 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 11:11:01,189 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 11:11:01,189 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 11:11:01,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 11:11:01,190 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 11:11:01,190 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 11:11:01,190 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 11:11:01,190 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 11:11:01,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 11:11:01,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 11:11:01,191 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 11:11:01,191 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 11:11:01,191 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 11:11:01,192 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 11:11:01,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 11:11:01,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 11:11:01,192 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 11:11:01,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 11:11:01,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:11:01,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 11:11:01,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 11:11:01,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 11:11:01,193 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 11:11:01,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 11:11:01,194 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 11:11:01,194 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 11:11:01,194 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 11:11:01,194 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 986945cc1d8674c803a19893f7d2aec71de46e5693e78eba56c7bdad24c6e341 [2022-07-22 11:11:01,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 11:11:01,421 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 11:11:01,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 11:11:01,425 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 11:11:01,426 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 11:11:01,427 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/floppy.i.cil-1.c [2022-07-22 11:11:01,482 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c53ef069/ac2574fbeab24e7d8fa3101b000a0ff3/FLAG542046dcd [2022-07-22 11:11:02,132 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 11:11:02,133 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-1.c [2022-07-22 11:11:02,183 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c53ef069/ac2574fbeab24e7d8fa3101b000a0ff3/FLAG542046dcd [2022-07-22 11:11:02,462 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c53ef069/ac2574fbeab24e7d8fa3101b000a0ff3 [2022-07-22 11:11:02,465 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 11:11:02,467 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 11:11:02,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 11:11:02,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 11:11:02,472 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 11:11:02,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:11:02" (1/1) ... [2022-07-22 11:11:02,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1be15773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:11:02, skipping insertion in model container [2022-07-22 11:11:02,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:11:02" (1/1) ... [2022-07-22 11:11:02,480 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 11:11:02,565 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 11:11:03,067 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-1.c[76734,76747] [2022-07-22 11:11:03,458 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:11:03,512 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 11:11:03,576 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-1.c[76734,76747] [2022-07-22 11:11:03,812 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:11:03,857 INFO L208 MainTranslator]: Completed translation [2022-07-22 11:11:03,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:11:03 WrapperNode [2022-07-22 11:11:03,858 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 11:11:03,859 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 11:11:03,859 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 11:11:03,859 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 11:11:03,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:11:03" (1/1) ... [2022-07-22 11:11:03,950 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:11:03" (1/1) ... [2022-07-22 11:11:04,060 INFO L137 Inliner]: procedures = 126, calls = 2874, calls flagged for inlining = 36, calls inlined = 25, statements flattened = 3043 [2022-07-22 11:11:04,060 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 11:11:04,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 11:11:04,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 11:11:04,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 11:11:04,069 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:11:03" (1/1) ... [2022-07-22 11:11:04,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:11:03" (1/1) ... [2022-07-22 11:11:04,098 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:11:03" (1/1) ... [2022-07-22 11:11:04,107 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:11:03" (1/1) ... [2022-07-22 11:11:04,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:11:03" (1/1) ... [2022-07-22 11:11:04,224 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:11:03" (1/1) ... [2022-07-22 11:11:04,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:11:03" (1/1) ... [2022-07-22 11:11:04,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 11:11:04,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 11:11:04,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 11:11:04,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 11:11:04,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:11:03" (1/1) ... [2022-07-22 11:11:04,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:11:04,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:11:04,309 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 11:11:04,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 11:11:04,352 INFO L130 BoogieDeclarations]: Found specification of procedure IoGetConfigurationInformation [2022-07-22 11:11:04,352 INFO L138 BoogieDeclarations]: Found implementation of procedure IoGetConfigurationInformation [2022-07-22 11:11:04,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-07-22 11:11:04,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-07-22 11:11:04,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-22 11:11:04,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 11:11:04,353 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-07-22 11:11:04,353 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-07-22 11:11:04,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-07-22 11:11:04,354 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-07-22 11:11:04,354 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-07-22 11:11:04,354 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-07-22 11:11:04,354 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2022-07-22 11:11:04,354 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2022-07-22 11:11:04,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 11:11:04,354 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2022-07-22 11:11:04,354 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2022-07-22 11:11:04,355 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-07-22 11:11:04,355 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-07-22 11:11:04,355 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedExchange [2022-07-22 11:11:04,355 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedExchange [2022-07-22 11:11:04,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-22 11:11:04,355 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-22 11:11:04,356 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-07-22 11:11:04,356 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-07-22 11:11:04,356 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-07-22 11:11:04,356 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-07-22 11:11:04,356 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2022-07-22 11:11:04,356 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2022-07-22 11:11:04,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 11:11:04,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 11:11:04,357 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2022-07-22 11:11:04,357 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2022-07-22 11:11:04,357 INFO L130 BoogieDeclarations]: Found specification of procedure ExfInterlockedInsertTailList [2022-07-22 11:11:04,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ExfInterlockedInsertTailList [2022-07-22 11:11:04,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 11:11:04,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-22 11:11:04,358 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-07-22 11:11:04,358 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-07-22 11:11:04,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-22 11:11:04,358 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2022-07-22 11:11:04,359 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2022-07-22 11:11:04,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 11:11:04,359 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-07-22 11:11:04,359 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-07-22 11:11:04,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 11:11:04,359 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2022-07-22 11:11:04,359 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2022-07-22 11:11:04,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-07-22 11:11:04,360 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2022-07-22 11:11:04,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2022-07-22 11:11:04,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 11:11:04,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 11:11:04,803 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 11:11:04,805 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 11:11:04,848 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:11:04,860 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-07-22 11:11:04,860 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-07-22 11:11:04,863 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:11:04,956 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2022-07-22 11:11:04,957 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2022-07-22 11:11:04,973 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:11:04,984 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-07-22 11:11:04,984 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-07-22 11:11:05,055 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:11:05,121 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-07-22 11:11:05,121 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-07-22 11:11:05,122 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:11:05,123 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:11:05,123 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:11:05,226 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume !false; [2022-07-22 11:11:05,226 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2022-07-22 11:11:05,226 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2022-07-22 11:11:05,226 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume false; [2022-07-22 11:11:05,227 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2022-07-22 11:11:05,227 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2022-07-22 11:11:05,229 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:11:05,234 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:11:05,235 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:11:05,622 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2022-07-22 11:11:05,623 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2022-07-22 11:11:05,623 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##139: assume false; [2022-07-22 11:11:05,623 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##140: assume !false; [2022-07-22 11:11:05,623 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##124: assume !false; [2022-07-22 11:11:05,623 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##123: assume false; [2022-07-22 11:11:05,645 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:11:05,671 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-07-22 11:11:05,671 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-07-22 11:11:05,679 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:11:05,680 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:11:05,681 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:11:05,683 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:11:05,683 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:11:05,686 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:11:05,687 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:11:05,688 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-22 11:11:09,183 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##97: assume !false; [2022-07-22 11:11:09,183 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##96: assume false; [2022-07-22 11:11:09,184 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##76: assume false; [2022-07-22 11:11:09,184 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##177: assume !false; [2022-07-22 11:11:09,184 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##176: assume false; [2022-07-22 11:11:09,184 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##77: assume !false; [2022-07-22 11:11:09,184 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##48: assume !false; [2022-07-22 11:11:09,184 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume false; [2022-07-22 11:11:09,184 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##27: assume !false; [2022-07-22 11:11:09,184 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume false; [2022-07-22 11:11:09,184 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##162: assume false; [2022-07-22 11:11:09,184 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##163: assume !false; [2022-07-22 11:11:09,185 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##210: assume false; [2022-07-22 11:11:09,185 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##211: assume !false; [2022-07-22 11:11:09,185 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##108: assume !false; [2022-07-22 11:11:09,185 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##107: assume false; [2022-07-22 11:11:09,199 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 11:11:09,219 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 11:11:09,219 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-22 11:11:09,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:11:09 BoogieIcfgContainer [2022-07-22 11:11:09,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 11:11:09,227 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 11:11:09,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 11:11:09,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 11:11:09,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 11:11:02" (1/3) ... [2022-07-22 11:11:09,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@127ebd59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:11:09, skipping insertion in model container [2022-07-22 11:11:09,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:11:03" (2/3) ... [2022-07-22 11:11:09,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@127ebd59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:11:09, skipping insertion in model container [2022-07-22 11:11:09,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:11:09" (3/3) ... [2022-07-22 11:11:09,237 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy.i.cil-1.c [2022-07-22 11:11:09,250 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 11:11:09,251 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 11:11:09,335 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 11:11:09,341 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@c2766cc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@370ac1cc [2022-07-22 11:11:09,342 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 11:11:09,349 INFO L276 IsEmpty]: Start isEmpty. Operand has 564 states, 453 states have (on average 1.5011037527593818) internal successors, (680), 486 states have internal predecessors, (680), 90 states have call successors, (90), 19 states have call predecessors, (90), 19 states have return successors, (90), 84 states have call predecessors, (90), 90 states have call successors, (90) [2022-07-22 11:11:09,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-22 11:11:09,357 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:09,358 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:11:09,358 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:09,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:09,364 INFO L85 PathProgramCache]: Analyzing trace with hash -197079634, now seen corresponding path program 1 times [2022-07-22 11:11:09,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:09,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463690641] [2022-07-22 11:11:09,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:09,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:09,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:10,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:11:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:10,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:11:10,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:10,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:10,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:10,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463690641] [2022-07-22 11:11:10,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463690641] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:10,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:10,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:11:10,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245840665] [2022-07-22 11:11:10,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:10,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:11:10,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:10,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:11:10,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:11:10,090 INFO L87 Difference]: Start difference. First operand has 564 states, 453 states have (on average 1.5011037527593818) internal successors, (680), 486 states have internal predecessors, (680), 90 states have call successors, (90), 19 states have call predecessors, (90), 19 states have return successors, (90), 84 states have call predecessors, (90), 90 states have call successors, (90) Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 11:11:14,088 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:14,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:14,328 INFO L93 Difference]: Finished difference Result 1130 states and 1773 transitions. [2022-07-22 11:11:14,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 11:11:14,331 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-07-22 11:11:14,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:14,346 INFO L225 Difference]: With dead ends: 1130 [2022-07-22 11:11:14,359 INFO L226 Difference]: Without dead ends: 639 [2022-07-22 11:11:14,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:11:14,377 INFO L413 NwaCegarLoop]: 749 mSDtfsCounter, 393 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 226 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 2105 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:14,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 2105 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 757 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2022-07-22 11:11:14,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-07-22 11:11:14,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 563. [2022-07-22 11:11:14,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 452 states have (on average 1.4623893805309736) internal successors, (661), 483 states have internal predecessors, (661), 90 states have call successors, (90), 21 states have call predecessors, (90), 20 states have return successors, (67), 65 states have call predecessors, (67), 67 states have call successors, (67) [2022-07-22 11:11:14,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 818 transitions. [2022-07-22 11:11:14,461 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 818 transitions. Word has length 26 [2022-07-22 11:11:14,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:14,461 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 818 transitions. [2022-07-22 11:11:14,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 11:11:14,462 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 818 transitions. [2022-07-22 11:11:14,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-22 11:11:14,463 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:14,463 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:11:14,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 11:11:14,464 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:14,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:14,464 INFO L85 PathProgramCache]: Analyzing trace with hash -169212496, now seen corresponding path program 1 times [2022-07-22 11:11:14,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:14,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888448932] [2022-07-22 11:11:14,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:14,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:14,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:11:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:14,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:11:14,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:14,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:14,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888448932] [2022-07-22 11:11:14,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888448932] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:14,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:14,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 11:11:14,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503567883] [2022-07-22 11:11:14,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:14,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 11:11:14,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:14,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 11:11:14,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:11:14,703 INFO L87 Difference]: Start difference. First operand 563 states and 818 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 11:11:18,568 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:18,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:18,757 INFO L93 Difference]: Finished difference Result 1183 states and 1738 transitions. [2022-07-22 11:11:18,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 11:11:18,758 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2022-07-22 11:11:18,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:18,764 INFO L225 Difference]: With dead ends: 1183 [2022-07-22 11:11:18,764 INFO L226 Difference]: Without dead ends: 639 [2022-07-22 11:11:18,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 11:11:18,767 INFO L413 NwaCegarLoop]: 739 mSDtfsCounter, 359 mSDsluCounter, 1964 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 218 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 2703 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:18,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 2703 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 948 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2022-07-22 11:11:18,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-07-22 11:11:18,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 563. [2022-07-22 11:11:18,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 452 states have (on average 1.4601769911504425) internal successors, (660), 483 states have internal predecessors, (660), 90 states have call successors, (90), 21 states have call predecessors, (90), 20 states have return successors, (67), 65 states have call predecessors, (67), 67 states have call successors, (67) [2022-07-22 11:11:18,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 817 transitions. [2022-07-22 11:11:18,800 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 817 transitions. Word has length 29 [2022-07-22 11:11:18,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:18,800 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 817 transitions. [2022-07-22 11:11:18,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 11:11:18,800 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 817 transitions. [2022-07-22 11:11:18,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-22 11:11:18,801 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:18,801 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:11:18,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 11:11:18,802 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:18,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:18,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1081663514, now seen corresponding path program 1 times [2022-07-22 11:11:18,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:18,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875816565] [2022-07-22 11:11:18,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:18,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:18,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:19,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:11:19,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:19,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:11:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:19,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:19,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875816565] [2022-07-22 11:11:19,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875816565] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:19,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:19,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:11:19,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933705093] [2022-07-22 11:11:19,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:19,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:11:19,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:19,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:11:19,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:11:19,068 INFO L87 Difference]: Start difference. First operand 563 states and 817 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 11:11:22,450 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:23,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:23,670 INFO L93 Difference]: Finished difference Result 1494 states and 2232 transitions. [2022-07-22 11:11:23,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 11:11:23,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2022-07-22 11:11:23,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:23,677 INFO L225 Difference]: With dead ends: 1494 [2022-07-22 11:11:23,678 INFO L226 Difference]: Without dead ends: 1093 [2022-07-22 11:11:23,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:11:23,681 INFO L413 NwaCegarLoop]: 913 mSDtfsCounter, 1298 mSDsluCounter, 1455 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 407 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1330 SdHoareTripleChecker+Valid, 2368 SdHoareTripleChecker+Invalid, 1405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:23,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1330 Valid, 2368 Invalid, 1405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [407 Valid, 997 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2022-07-22 11:11:23,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2022-07-22 11:11:23,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 979. [2022-07-22 11:11:23,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 813 states have (on average 1.4452644526445264) internal successors, (1175), 840 states have internal predecessors, (1175), 124 states have call successors, (124), 38 states have call predecessors, (124), 41 states have return successors, (147), 108 states have call predecessors, (147), 109 states have call successors, (147) [2022-07-22 11:11:23,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 1446 transitions. [2022-07-22 11:11:23,727 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 1446 transitions. Word has length 33 [2022-07-22 11:11:23,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:23,727 INFO L495 AbstractCegarLoop]: Abstraction has 979 states and 1446 transitions. [2022-07-22 11:11:23,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 11:11:23,728 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 1446 transitions. [2022-07-22 11:11:23,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 11:11:23,730 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:23,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:11:23,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 11:11:23,731 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:23,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:23,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1331144769, now seen corresponding path program 1 times [2022-07-22 11:11:23,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:23,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412775618] [2022-07-22 11:11:23,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:23,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:23,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:11:23,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:24,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:11:24,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:24,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 11:11:24,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:24,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:24,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:24,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412775618] [2022-07-22 11:11:24,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412775618] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:24,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:24,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:11:24,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225274614] [2022-07-22 11:11:24,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:24,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:11:24,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:24,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:11:24,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:11:24,036 INFO L87 Difference]: Start difference. First operand 979 states and 1446 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:11:27,482 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:28,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:28,346 INFO L93 Difference]: Finished difference Result 1814 states and 2766 transitions. [2022-07-22 11:11:28,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 11:11:28,347 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-07-22 11:11:28,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:28,356 INFO L225 Difference]: With dead ends: 1814 [2022-07-22 11:11:28,357 INFO L226 Difference]: Without dead ends: 1796 [2022-07-22 11:11:28,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:11:28,359 INFO L413 NwaCegarLoop]: 769 mSDtfsCounter, 1429 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 386 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1494 SdHoareTripleChecker+Valid, 1999 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:28,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1494 Valid, 1999 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 789 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2022-07-22 11:11:28,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1796 states. [2022-07-22 11:11:28,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1796 to 1569. [2022-07-22 11:11:28,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1569 states, 1311 states have (on average 1.4683447749809306) internal successors, (1925), 1356 states have internal predecessors, (1925), 189 states have call successors, (189), 61 states have call predecessors, (189), 68 states have return successors, (250), 164 states have call predecessors, (250), 174 states have call successors, (250) [2022-07-22 11:11:28,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1569 states to 1569 states and 2364 transitions. [2022-07-22 11:11:28,426 INFO L78 Accepts]: Start accepts. Automaton has 1569 states and 2364 transitions. Word has length 45 [2022-07-22 11:11:28,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:28,427 INFO L495 AbstractCegarLoop]: Abstraction has 1569 states and 2364 transitions. [2022-07-22 11:11:28,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:11:28,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1569 states and 2364 transitions. [2022-07-22 11:11:28,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-22 11:11:28,429 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:28,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:11:28,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 11:11:28,430 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:28,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:28,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1069708837, now seen corresponding path program 1 times [2022-07-22 11:11:28,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:28,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131560613] [2022-07-22 11:11:28,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:28,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:28,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:28,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:11:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:28,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:11:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:28,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:28,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:28,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131560613] [2022-07-22 11:11:28,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131560613] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:28,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:28,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:11:28,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689970263] [2022-07-22 11:11:28,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:28,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:11:28,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:28,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:11:28,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:11:28,731 INFO L87 Difference]: Start difference. First operand 1569 states and 2364 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 11:11:32,786 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:33,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:33,154 INFO L93 Difference]: Finished difference Result 1793 states and 2748 transitions. [2022-07-22 11:11:33,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 11:11:33,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2022-07-22 11:11:33,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:33,162 INFO L225 Difference]: With dead ends: 1793 [2022-07-22 11:11:33,162 INFO L226 Difference]: Without dead ends: 1789 [2022-07-22 11:11:33,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:11:33,164 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 460 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 234 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 1992 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:33,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 1992 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 744 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2022-07-22 11:11:33,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2022-07-22 11:11:33,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 1602. [2022-07-22 11:11:33,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1342 states have (on average 1.4679582712369597) internal successors, (1970), 1384 states have internal predecessors, (1970), 190 states have call successors, (190), 63 states have call predecessors, (190), 69 states have return successors, (251), 165 states have call predecessors, (251), 175 states have call successors, (251) [2022-07-22 11:11:33,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 2411 transitions. [2022-07-22 11:11:33,225 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 2411 transitions. Word has length 43 [2022-07-22 11:11:33,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:33,226 INFO L495 AbstractCegarLoop]: Abstraction has 1602 states and 2411 transitions. [2022-07-22 11:11:33,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 11:11:33,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 2411 transitions. [2022-07-22 11:11:33,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 11:11:33,227 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:33,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:11:33,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 11:11:33,228 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:33,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:33,229 INFO L85 PathProgramCache]: Analyzing trace with hash -897411344, now seen corresponding path program 1 times [2022-07-22 11:11:33,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:33,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817148340] [2022-07-22 11:11:33,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:33,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:33,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:33,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:11:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:33,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:11:33,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:33,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:33,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:33,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817148340] [2022-07-22 11:11:33,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817148340] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:33,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:33,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:11:33,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692844425] [2022-07-22 11:11:33,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:33,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:11:33,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:33,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:11:33,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:11:33,419 INFO L87 Difference]: Start difference. First operand 1602 states and 2411 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 11:11:36,609 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:38,722 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:39,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:39,939 INFO L93 Difference]: Finished difference Result 3169 states and 4941 transitions. [2022-07-22 11:11:39,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 11:11:39,939 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2022-07-22 11:11:39,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:39,958 INFO L225 Difference]: With dead ends: 3169 [2022-07-22 11:11:39,959 INFO L226 Difference]: Without dead ends: 3166 [2022-07-22 11:11:39,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:11:39,963 INFO L413 NwaCegarLoop]: 1138 mSDtfsCounter, 901 mSDsluCounter, 1739 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 297 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 2877 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:39,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [927 Valid, 2877 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1143 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2022-07-22 11:11:39,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3166 states. [2022-07-22 11:11:40,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3166 to 2550. [2022-07-22 11:11:40,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2173 states have (on average 1.4832029452369995) internal successors, (3223), 2225 states have internal predecessors, (3223), 266 states have call successors, (266), 99 states have call predecessors, (266), 110 states have return successors, (392), 236 states have call predecessors, (392), 251 states have call successors, (392) [2022-07-22 11:11:40,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 3881 transitions. [2022-07-22 11:11:40,080 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 3881 transitions. Word has length 45 [2022-07-22 11:11:40,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:40,081 INFO L495 AbstractCegarLoop]: Abstraction has 2550 states and 3881 transitions. [2022-07-22 11:11:40,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 11:11:40,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 3881 transitions. [2022-07-22 11:11:40,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-22 11:11:40,083 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:40,083 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:11:40,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 11:11:40,084 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:40,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:40,085 INFO L85 PathProgramCache]: Analyzing trace with hash -285485209, now seen corresponding path program 1 times [2022-07-22 11:11:40,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:40,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518229939] [2022-07-22 11:11:40,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:40,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:40,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:11:40,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:40,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:11:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:40,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-22 11:11:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:40,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 11:11:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:40,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:40,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:40,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518229939] [2022-07-22 11:11:40,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518229939] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:40,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:40,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 11:11:40,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858649763] [2022-07-22 11:11:40,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:40,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 11:11:40,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:40,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 11:11:40,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:11:40,425 INFO L87 Difference]: Start difference. First operand 2550 states and 3881 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:11:44,636 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:46,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:46,290 INFO L93 Difference]: Finished difference Result 3798 states and 5980 transitions. [2022-07-22 11:11:46,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 11:11:46,291 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2022-07-22 11:11:46,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:46,310 INFO L225 Difference]: With dead ends: 3798 [2022-07-22 11:11:46,310 INFO L226 Difference]: Without dead ends: 3790 [2022-07-22 11:11:46,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2022-07-22 11:11:46,313 INFO L413 NwaCegarLoop]: 1044 mSDtfsCounter, 2650 mSDsluCounter, 2144 mSDsCounter, 0 mSdLazyCounter, 2014 mSolverCounterSat, 1070 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2711 SdHoareTripleChecker+Valid, 3188 SdHoareTripleChecker+Invalid, 3085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1070 IncrementalHoareTripleChecker+Valid, 2014 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:46,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2711 Valid, 3188 Invalid, 3085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1070 Valid, 2014 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2022-07-22 11:11:46,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2022-07-22 11:11:46,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 3139. [2022-07-22 11:11:46,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3139 states, 2670 states have (on average 1.4876404494382023) internal successors, (3972), 2741 states have internal predecessors, (3972), 332 states have call successors, (332), 116 states have call predecessors, (332), 136 states have return successors, (525), 292 states have call predecessors, (525), 317 states have call successors, (525) [2022-07-22 11:11:46,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3139 states to 3139 states and 4829 transitions. [2022-07-22 11:11:46,447 INFO L78 Accepts]: Start accepts. Automaton has 3139 states and 4829 transitions. Word has length 47 [2022-07-22 11:11:46,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:46,447 INFO L495 AbstractCegarLoop]: Abstraction has 3139 states and 4829 transitions. [2022-07-22 11:11:46,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:11:46,448 INFO L276 IsEmpty]: Start isEmpty. Operand 3139 states and 4829 transitions. [2022-07-22 11:11:46,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-22 11:11:46,449 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:46,449 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:11:46,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 11:11:46,450 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:46,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:46,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1518670529, now seen corresponding path program 1 times [2022-07-22 11:11:46,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:46,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961764369] [2022-07-22 11:11:46,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:46,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:46,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:11:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:46,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:11:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:46,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 11:11:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:46,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:46,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:46,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961764369] [2022-07-22 11:11:46,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961764369] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:46,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:46,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:11:46,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575105011] [2022-07-22 11:11:46,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:46,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:11:46,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:46,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:11:46,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:11:46,661 INFO L87 Difference]: Start difference. First operand 3139 states and 4829 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:11:50,199 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:53,017 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:11:53,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:11:53,686 INFO L93 Difference]: Finished difference Result 9987 states and 15921 transitions. [2022-07-22 11:11:53,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 11:11:53,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-07-22 11:11:53,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:11:53,730 INFO L225 Difference]: With dead ends: 9987 [2022-07-22 11:11:53,731 INFO L226 Difference]: Without dead ends: 7066 [2022-07-22 11:11:53,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:11:53,754 INFO L413 NwaCegarLoop]: 957 mSDtfsCounter, 1297 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 339 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1366 SdHoareTripleChecker+Valid, 2361 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:11:53,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1366 Valid, 2361 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 850 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-07-22 11:11:53,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7066 states. [2022-07-22 11:11:54,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7066 to 6230. [2022-07-22 11:11:54,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6230 states, 5324 states have (on average 1.5005634861006762) internal successors, (7989), 5487 states have internal predecessors, (7989), 647 states have call successors, (647), 214 states have call predecessors, (647), 258 states have return successors, (1139), 551 states have call predecessors, (1139), 635 states have call successors, (1139) [2022-07-22 11:11:54,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6230 states to 6230 states and 9775 transitions. [2022-07-22 11:11:54,128 INFO L78 Accepts]: Start accepts. Automaton has 6230 states and 9775 transitions. Word has length 46 [2022-07-22 11:11:54,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:11:54,129 INFO L495 AbstractCegarLoop]: Abstraction has 6230 states and 9775 transitions. [2022-07-22 11:11:54,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:11:54,129 INFO L276 IsEmpty]: Start isEmpty. Operand 6230 states and 9775 transitions. [2022-07-22 11:11:54,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-22 11:11:54,132 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:11:54,132 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:11:54,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 11:11:54,133 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:11:54,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:11:54,133 INFO L85 PathProgramCache]: Analyzing trace with hash 2006170664, now seen corresponding path program 1 times [2022-07-22 11:11:54,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:11:54,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702314425] [2022-07-22 11:11:54,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:11:54,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:11:54,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:54,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:11:54,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:54,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:11:54,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:11:54,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:11:54,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:11:54,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702314425] [2022-07-22 11:11:54,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702314425] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:11:54,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:11:54,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 11:11:54,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085027209] [2022-07-22 11:11:54,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:11:54,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 11:11:54,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:11:54,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 11:11:54,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:11:54,354 INFO L87 Difference]: Start difference. First operand 6230 states and 9775 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 11:11:58,030 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:00,115 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:01,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:12:01,629 INFO L93 Difference]: Finished difference Result 13181 states and 20868 transitions. [2022-07-22 11:12:01,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 11:12:01,630 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2022-07-22 11:12:01,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:12:01,667 INFO L225 Difference]: With dead ends: 13181 [2022-07-22 11:12:01,667 INFO L226 Difference]: Without dead ends: 7261 [2022-07-22 11:12:01,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-07-22 11:12:01,690 INFO L413 NwaCegarLoop]: 907 mSDtfsCounter, 2164 mSDsluCounter, 1363 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 694 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2207 SdHoareTripleChecker+Valid, 2270 SdHoareTripleChecker+Invalid, 1833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 694 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-07-22 11:12:01,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2207 Valid, 2270 Invalid, 1833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [694 Valid, 1137 Invalid, 2 Unknown, 0 Unchecked, 6.9s Time] [2022-07-22 11:12:01,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7261 states. [2022-07-22 11:12:01,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7261 to 6221. [2022-07-22 11:12:01,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6221 states, 5315 states have (on average 1.4991533396048917) internal successors, (7968), 5478 states have internal predecessors, (7968), 647 states have call successors, (647), 214 states have call predecessors, (647), 258 states have return successors, (1139), 551 states have call predecessors, (1139), 635 states have call successors, (1139) [2022-07-22 11:12:02,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6221 states to 6221 states and 9754 transitions. [2022-07-22 11:12:02,025 INFO L78 Accepts]: Start accepts. Automaton has 6221 states and 9754 transitions. Word has length 46 [2022-07-22 11:12:02,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:12:02,027 INFO L495 AbstractCegarLoop]: Abstraction has 6221 states and 9754 transitions. [2022-07-22 11:12:02,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 11:12:02,028 INFO L276 IsEmpty]: Start isEmpty. Operand 6221 states and 9754 transitions. [2022-07-22 11:12:02,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 11:12:02,029 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:12:02,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:12:02,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 11:12:02,030 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:12:02,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:12:02,030 INFO L85 PathProgramCache]: Analyzing trace with hash -703618871, now seen corresponding path program 1 times [2022-07-22 11:12:02,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:12:02,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187133592] [2022-07-22 11:12:02,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:12:02,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:12:02,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:02,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:12:02,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:02,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:12:02,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:02,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-22 11:12:02,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:02,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 11:12:02,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:12:02,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:12:02,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187133592] [2022-07-22 11:12:02,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187133592] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:12:02,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:12:02,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 11:12:02,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077953705] [2022-07-22 11:12:02,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:12:02,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 11:12:02,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:12:02,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 11:12:02,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:12:02,352 INFO L87 Difference]: Start difference. First operand 6221 states and 9754 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:12:06,895 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:09,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:12:09,241 INFO L93 Difference]: Finished difference Result 7131 states and 11388 transitions. [2022-07-22 11:12:09,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 11:12:09,241 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2022-07-22 11:12:09,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:12:09,268 INFO L225 Difference]: With dead ends: 7131 [2022-07-22 11:12:09,269 INFO L226 Difference]: Without dead ends: 7126 [2022-07-22 11:12:09,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2022-07-22 11:12:09,274 INFO L413 NwaCegarLoop]: 1024 mSDtfsCounter, 2455 mSDsluCounter, 2107 mSDsCounter, 0 mSdLazyCounter, 2011 mSolverCounterSat, 925 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2517 SdHoareTripleChecker+Valid, 3131 SdHoareTripleChecker+Invalid, 2937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 925 IncrementalHoareTripleChecker+Valid, 2011 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:12:09,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2517 Valid, 3131 Invalid, 2937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [925 Valid, 2011 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2022-07-22 11:12:09,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7126 states. [2022-07-22 11:12:09,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7126 to 6221. [2022-07-22 11:12:09,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6221 states, 5315 states have (on average 1.4989651928504233) internal successors, (7967), 5478 states have internal predecessors, (7967), 647 states have call successors, (647), 214 states have call predecessors, (647), 258 states have return successors, (1139), 551 states have call predecessors, (1139), 635 states have call successors, (1139) [2022-07-22 11:12:09,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6221 states to 6221 states and 9753 transitions. [2022-07-22 11:12:09,627 INFO L78 Accepts]: Start accepts. Automaton has 6221 states and 9753 transitions. Word has length 48 [2022-07-22 11:12:09,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:12:09,628 INFO L495 AbstractCegarLoop]: Abstraction has 6221 states and 9753 transitions. [2022-07-22 11:12:09,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:12:09,628 INFO L276 IsEmpty]: Start isEmpty. Operand 6221 states and 9753 transitions. [2022-07-22 11:12:09,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-22 11:12:09,630 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:12:09,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:12:09,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 11:12:09,630 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:12:09,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:12:09,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1527761131, now seen corresponding path program 1 times [2022-07-22 11:12:09,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:12:09,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775735674] [2022-07-22 11:12:09,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:12:09,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:12:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:09,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:12:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:10,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:12:10,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:10,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 11:12:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:10,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 11:12:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:10,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:12:10,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:12:10,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775735674] [2022-07-22 11:12:10,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775735674] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:12:10,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:12:10,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 11:12:10,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918471624] [2022-07-22 11:12:10,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:12:10,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 11:12:10,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:12:10,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 11:12:10,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-22 11:12:10,123 INFO L87 Difference]: Start difference. First operand 6221 states and 9753 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:12:14,415 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:16,440 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:17,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:12:17,541 INFO L93 Difference]: Finished difference Result 13280 states and 21298 transitions. [2022-07-22 11:12:17,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 11:12:17,542 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2022-07-22 11:12:17,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:12:17,567 INFO L225 Difference]: With dead ends: 13280 [2022-07-22 11:12:17,567 INFO L226 Difference]: Without dead ends: 7024 [2022-07-22 11:12:17,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-07-22 11:12:17,606 INFO L413 NwaCegarLoop]: 697 mSDtfsCounter, 657 mSDsluCounter, 2282 mSDsCounter, 0 mSdLazyCounter, 1720 mSolverCounterSat, 261 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 2979 SdHoareTripleChecker+Invalid, 1983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 1720 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:12:17,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 2979 Invalid, 1983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 1720 Invalid, 2 Unknown, 0 Unchecked, 7.0s Time] [2022-07-22 11:12:17,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7024 states. [2022-07-22 11:12:17,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7024 to 6248. [2022-07-22 11:12:17,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6248 states, 5340 states have (on average 1.496629213483146) internal successors, (7992), 5505 states have internal predecessors, (7992), 647 states have call successors, (647), 214 states have call predecessors, (647), 260 states have return successors, (1144), 551 states have call predecessors, (1144), 635 states have call successors, (1144) [2022-07-22 11:12:17,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6248 states to 6248 states and 9783 transitions. [2022-07-22 11:12:17,912 INFO L78 Accepts]: Start accepts. Automaton has 6248 states and 9783 transitions. Word has length 50 [2022-07-22 11:12:17,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:12:17,912 INFO L495 AbstractCegarLoop]: Abstraction has 6248 states and 9783 transitions. [2022-07-22 11:12:17,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:12:17,913 INFO L276 IsEmpty]: Start isEmpty. Operand 6248 states and 9783 transitions. [2022-07-22 11:12:17,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-22 11:12:17,914 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:12:17,914 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:12:17,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 11:12:17,915 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:12:17,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:12:17,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1588923091, now seen corresponding path program 1 times [2022-07-22 11:12:17,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:12:17,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776826553] [2022-07-22 11:12:17,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:12:17,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:12:18,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:18,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:12:18,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:18,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 11:12:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:18,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-22 11:12:18,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:18,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 11:12:18,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:18,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:12:18,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:12:18,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776826553] [2022-07-22 11:12:18,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776826553] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:12:18,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67034385] [2022-07-22 11:12:18,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:12:18,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:12:18,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:12:18,428 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:12:18,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 11:12:19,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:19,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 2370 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 11:12:19,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:12:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:12:19,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:12:19,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:12:19,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67034385] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:12:19,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:12:19,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2022-07-22 11:12:19,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954519211] [2022-07-22 11:12:19,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:12:19,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 11:12:19,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:12:19,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 11:12:19,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-07-22 11:12:19,487 INFO L87 Difference]: Start difference. First operand 6248 states and 9783 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 10 states have internal predecessors, (61), 2 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-22 11:12:23,957 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:25,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:12:25,095 INFO L93 Difference]: Finished difference Result 13331 states and 21354 transitions. [2022-07-22 11:12:25,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 11:12:25,095 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 10 states have internal predecessors, (61), 2 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 51 [2022-07-22 11:12:25,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:12:25,126 INFO L225 Difference]: With dead ends: 13331 [2022-07-22 11:12:25,126 INFO L226 Difference]: Without dead ends: 7047 [2022-07-22 11:12:25,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2022-07-22 11:12:25,153 INFO L413 NwaCegarLoop]: 696 mSDtfsCounter, 1043 mSDsluCounter, 2049 mSDsCounter, 0 mSdLazyCounter, 1427 mSolverCounterSat, 482 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1064 SdHoareTripleChecker+Valid, 2745 SdHoareTripleChecker+Invalid, 1910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 1427 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:12:25,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1064 Valid, 2745 Invalid, 1910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 1427 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2022-07-22 11:12:25,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7047 states. [2022-07-22 11:12:25,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7047 to 6271. [2022-07-22 11:12:25,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6271 states, 5363 states have (on average 1.4944993473801977) internal successors, (8015), 5528 states have internal predecessors, (8015), 647 states have call successors, (647), 214 states have call predecessors, (647), 260 states have return successors, (1144), 551 states have call predecessors, (1144), 635 states have call successors, (1144) [2022-07-22 11:12:25,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6271 states to 6271 states and 9806 transitions. [2022-07-22 11:12:25,533 INFO L78 Accepts]: Start accepts. Automaton has 6271 states and 9806 transitions. Word has length 51 [2022-07-22 11:12:25,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:12:25,533 INFO L495 AbstractCegarLoop]: Abstraction has 6271 states and 9806 transitions. [2022-07-22 11:12:25,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 10 states have internal predecessors, (61), 2 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-22 11:12:25,533 INFO L276 IsEmpty]: Start isEmpty. Operand 6271 states and 9806 transitions. [2022-07-22 11:12:25,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-22 11:12:25,535 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:12:25,535 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:12:25,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 11:12:25,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-22 11:12:25,760 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:12:25,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:12:25,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1153105173, now seen corresponding path program 2 times [2022-07-22 11:12:25,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:12:25,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588345522] [2022-07-22 11:12:25,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:12:25,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:12:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:26,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:12:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:26,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 11:12:26,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:26,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 11:12:26,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:26,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 11:12:26,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:26,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:12:26,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:12:26,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588345522] [2022-07-22 11:12:26,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588345522] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:12:26,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236059182] [2022-07-22 11:12:26,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 11:12:26,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:12:26,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:12:26,360 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:12:26,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 11:12:30,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 11:12:30,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:12:30,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 2415 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 11:12:30,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:12:30,774 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:12:30,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:12:31,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:12:31,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236059182] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:12:31,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:12:31,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 23 [2022-07-22 11:12:31,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414780633] [2022-07-22 11:12:31,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:12:31,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 11:12:31,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:12:31,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 11:12:31,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2022-07-22 11:12:31,102 INFO L87 Difference]: Start difference. First operand 6271 states and 9806 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 19 states have internal predecessors, (70), 2 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-22 11:12:37,985 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-22 11:12:39,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:12:39,407 INFO L93 Difference]: Finished difference Result 13497 states and 21603 transitions. [2022-07-22 11:12:39,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-22 11:12:39,408 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 19 states have internal predecessors, (70), 2 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 54 [2022-07-22 11:12:39,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:12:39,436 INFO L225 Difference]: With dead ends: 13497 [2022-07-22 11:12:39,437 INFO L226 Difference]: Without dead ends: 7113 [2022-07-22 11:12:39,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=485, Invalid=1585, Unknown=0, NotChecked=0, Total=2070 [2022-07-22 11:12:39,463 INFO L413 NwaCegarLoop]: 699 mSDtfsCounter, 700 mSDsluCounter, 4316 mSDsCounter, 0 mSdLazyCounter, 3163 mSolverCounterSat, 314 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 5015 SdHoareTripleChecker+Invalid, 3478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 3163 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:12:39,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 5015 Invalid, 3478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 3163 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2022-07-22 11:12:39,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7113 states. [2022-07-22 11:12:39,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7113 to 6337. [2022-07-22 11:12:39,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6337 states, 5429 states have (on average 1.488487750967029) internal successors, (8081), 5594 states have internal predecessors, (8081), 647 states have call successors, (647), 214 states have call predecessors, (647), 260 states have return successors, (1144), 551 states have call predecessors, (1144), 635 states have call successors, (1144) [2022-07-22 11:12:39,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6337 states to 6337 states and 9872 transitions. [2022-07-22 11:12:39,876 INFO L78 Accepts]: Start accepts. Automaton has 6337 states and 9872 transitions. Word has length 54 [2022-07-22 11:12:39,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:12:39,876 INFO L495 AbstractCegarLoop]: Abstraction has 6337 states and 9872 transitions. [2022-07-22 11:12:39,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 19 states have internal predecessors, (70), 2 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-22 11:12:39,877 INFO L276 IsEmpty]: Start isEmpty. Operand 6337 states and 9872 transitions. [2022-07-22 11:12:39,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-22 11:12:39,878 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:12:39,879 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:12:39,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 11:12:40,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-22 11:12:40,100 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:12:40,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:12:40,100 INFO L85 PathProgramCache]: Analyzing trace with hash -983008789, now seen corresponding path program 3 times [2022-07-22 11:12:40,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:12:40,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537357982] [2022-07-22 11:12:40,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:12:40,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:12:40,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:40,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:12:40,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:40,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 11:12:40,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:40,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-22 11:12:40,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:40,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-22 11:12:40,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:12:40,946 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:12:40,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:12:40,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537357982] [2022-07-22 11:12:40,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537357982] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:12:40,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345656174] [2022-07-22 11:12:40,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 11:12:40,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:12:40,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:12:40,950 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:12:40,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process