./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ad0884018313fc350052496ea1071e31a8b2c3997d36767afc87946a21697816 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 11:44:41,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 11:44:41,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 11:44:41,216 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 11:44:41,216 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 11:44:41,217 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 11:44:41,218 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 11:44:41,219 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 11:44:41,220 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 11:44:41,220 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 11:44:41,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 11:44:41,222 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 11:44:41,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 11:44:41,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 11:44:41,223 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 11:44:41,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 11:44:41,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 11:44:41,225 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 11:44:41,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 11:44:41,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 11:44:41,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 11:44:41,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 11:44:41,241 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 11:44:41,242 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 11:44:41,248 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 11:44:41,248 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 11:44:41,248 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 11:44:41,252 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 11:44:41,253 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 11:44:41,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 11:44:41,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 11:44:41,254 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 11:44:41,256 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 11:44:41,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 11:44:41,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 11:44:41,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 11:44:41,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 11:44:41,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 11:44:41,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 11:44:41,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 11:44:41,259 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 11:44:41,260 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 11:44:41,286 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 11:44:41,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 11:44:41,287 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 11:44:41,287 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 11:44:41,288 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 11:44:41,288 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 11:44:41,288 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 11:44:41,288 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 11:44:41,288 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 11:44:41,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 11:44:41,289 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 11:44:41,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 11:44:41,289 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 11:44:41,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 11:44:41,290 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 11:44:41,290 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 11:44:41,290 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 11:44:41,290 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 11:44:41,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 11:44:41,290 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 11:44:41,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 11:44:41,291 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 11:44:41,291 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 11:44:41,291 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 11:44:41,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:44:41,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 11:44:41,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 11:44:41,292 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 11:44:41,292 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 11:44:41,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 11:44:41,292 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 11:44:41,292 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 11:44:41,292 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 11:44:41,292 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 11:44:41,293 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad0884018313fc350052496ea1071e31a8b2c3997d36767afc87946a21697816 [2021-12-14 11:44:41,475 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 11:44:41,500 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 11:44:41,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 11:44:41,502 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 11:44:41,503 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 11:44:41,504 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c [2021-12-14 11:44:41,572 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edd149bb8/0e3e4526b4404a13a3374ea9554da13e/FLAG255c76251 [2021-12-14 11:44:42,167 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 11:44:42,168 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c [2021-12-14 11:44:42,203 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edd149bb8/0e3e4526b4404a13a3374ea9554da13e/FLAG255c76251 [2021-12-14 11:44:42,584 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edd149bb8/0e3e4526b4404a13a3374ea9554da13e [2021-12-14 11:44:42,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 11:44:42,589 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 11:44:42,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 11:44:42,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 11:44:42,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 11:44:42,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:44:42" (1/1) ... [2021-12-14 11:44:42,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a1d2ffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:44:42, skipping insertion in model container [2021-12-14 11:44:42,595 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:44:42" (1/1) ... [2021-12-14 11:44:42,599 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 11:44:42,689 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 11:44:43,131 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c[90162,90175] [2021-12-14 11:44:43,678 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:44:43,685 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 11:44:43,742 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c[90162,90175] [2021-12-14 11:44:43,993 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:44:44,013 INFO L208 MainTranslator]: Completed translation [2021-12-14 11:44:44,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:44:44 WrapperNode [2021-12-14 11:44:44,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 11:44:44,015 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 11:44:44,015 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 11:44:44,015 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 11:44:44,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:44:44" (1/1) ... [2021-12-14 11:44:44,078 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:44:44" (1/1) ... [2021-12-14 11:44:44,154 INFO L137 Inliner]: procedures = 120, calls = 2195, calls flagged for inlining = 23, calls inlined = 19, statements flattened = 2336 [2021-12-14 11:44:44,155 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 11:44:44,155 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 11:44:44,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 11:44:44,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 11:44:44,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:44:44" (1/1) ... [2021-12-14 11:44:44,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:44:44" (1/1) ... [2021-12-14 11:44:44,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:44:44" (1/1) ... [2021-12-14 11:44:44,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:44:44" (1/1) ... [2021-12-14 11:44:44,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:44:44" (1/1) ... [2021-12-14 11:44:44,275 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:44:44" (1/1) ... [2021-12-14 11:44:44,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:44:44" (1/1) ... [2021-12-14 11:44:44,309 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 11:44:44,310 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 11:44:44,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 11:44:44,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 11:44:44,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:44:44" (1/1) ... [2021-12-14 11:44:44,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:44:44,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:44:44,354 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) [2021-12-14 11:44:44,389 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 [2021-12-14 11:44:44,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-14 11:44:44,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-14 11:44:44,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-14 11:44:44,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 11:44:44,408 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2021-12-14 11:44:44,408 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2021-12-14 11:44:44,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-14 11:44:44,408 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-14 11:44:44,408 INFO L130 BoogieDeclarations]: Found specification of procedure MmLockPagableDataSection [2021-12-14 11:44:44,408 INFO L138 BoogieDeclarations]: Found implementation of procedure MmLockPagableDataSection [2021-12-14 11:44:44,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 11:44:44,409 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2021-12-14 11:44:44,409 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2021-12-14 11:44:44,409 INFO L130 BoogieDeclarations]: Found specification of procedure IoOpenDeviceRegistryKey [2021-12-14 11:44:44,409 INFO L138 BoogieDeclarations]: Found implementation of procedure IoOpenDeviceRegistryKey [2021-12-14 11:44:44,409 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2021-12-14 11:44:44,409 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2021-12-14 11:44:44,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-14 11:44:44,410 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-14 11:44:44,410 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_malloc [2021-12-14 11:44:44,410 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_malloc [2021-12-14 11:44:44,410 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2021-12-14 11:44:44,410 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2021-12-14 11:44:44,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 11:44:44,410 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2021-12-14 11:44:44,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2021-12-14 11:44:44,410 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2021-12-14 11:44:44,411 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2021-12-14 11:44:44,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 11:44:44,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 11:44:44,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 11:44:44,411 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2021-12-14 11:44:44,411 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2021-12-14 11:44:44,411 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-14 11:44:44,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 11:44:44,411 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2021-12-14 11:44:44,412 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2021-12-14 11:44:44,412 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2021-12-14 11:44:44,412 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2021-12-14 11:44:44,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 11:44:44,412 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2021-12-14 11:44:44,412 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2021-12-14 11:44:44,412 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2021-12-14 11:44:44,412 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2021-12-14 11:44:44,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 11:44:44,413 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2021-12-14 11:44:44,413 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2021-12-14 11:44:44,413 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-14 11:44:44,413 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2021-12-14 11:44:44,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2021-12-14 11:44:44,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 11:44:44,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 11:44:44,413 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2021-12-14 11:44:44,414 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2021-12-14 11:44:44,738 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 11:44:44,739 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 11:44:44,862 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-14 11:44:44,874 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2021-12-14 11:44:44,874 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2021-12-14 11:44:45,187 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-14 11:44:45,210 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2021-12-14 11:44:45,211 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2021-12-14 11:44:45,234 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-14 11:44:45,236 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-14 11:44:45,239 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-14 11:44:45,253 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-14 11:44:45,260 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-14 11:44:45,273 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-14 11:44:53,533 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##276: assume false; [2021-12-14 11:44:53,533 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##277: assume !false; [2021-12-14 11:44:53,534 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##504: assume !false; [2021-12-14 11:44:53,534 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##503: assume false; [2021-12-14 11:44:53,534 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L3709: CdAudioPnp_#res#1 := 0; [2021-12-14 11:44:53,534 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##172: assume !false; [2021-12-14 11:44:53,534 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##171: assume false; [2021-12-14 11:44:53,534 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##65: assume !false; [2021-12-14 11:44:53,534 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##64: assume false; [2021-12-14 11:44:53,534 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##43: assume !false; [2021-12-14 11:44:53,534 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##42: assume false; [2021-12-14 11:44:53,534 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##32: assume false; [2021-12-14 11:44:53,534 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##33: assume !false; [2021-12-14 11:44:53,561 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-14 11:44:53,564 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2021-12-14 11:44:53,564 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2021-12-14 11:44:53,575 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 11:44:53,589 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 11:44:53,590 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-14 11:44:53,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:44:53 BoogieIcfgContainer [2021-12-14 11:44:53,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 11:44:53,594 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 11:44:53,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 11:44:53,596 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 11:44:53,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:44:42" (1/3) ... [2021-12-14 11:44:53,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6142cd75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:44:53, skipping insertion in model container [2021-12-14 11:44:53,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:44:44" (2/3) ... [2021-12-14 11:44:53,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6142cd75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:44:53, skipping insertion in model container [2021-12-14 11:44:53,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:44:53" (3/3) ... [2021-12-14 11:44:53,600 INFO L111 eAbstractionObserver]: Analyzing ICFG cdaudio.i.cil-1.c [2021-12-14 11:44:53,606 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 11:44:53,606 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 11:44:53,654 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 11:44:53,668 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 11:44:53,668 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 11:44:53,694 INFO L276 IsEmpty]: Start isEmpty. Operand has 617 states, 483 states have (on average 1.5196687370600415) internal successors, (734), 502 states have internal predecessors, (734), 113 states have call successors, (113), 19 states have call predecessors, (113), 19 states have return successors, (113), 108 states have call predecessors, (113), 113 states have call successors, (113) [2021-12-14 11:44:53,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-14 11:44:53,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:44:53,699 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:44:53,700 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:44:53,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:44:53,703 INFO L85 PathProgramCache]: Analyzing trace with hash 5486212, now seen corresponding path program 1 times [2021-12-14 11:44:53,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:44:53,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98129305] [2021-12-14 11:44:53,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:44:53,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:44:53,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:44:53,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:44:53,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:44:53,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98129305] [2021-12-14 11:44:53,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98129305] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:44:53,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:44:53,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 11:44:53,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759787551] [2021-12-14 11:44:53,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:44:53,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 11:44:53,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:44:53,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 11:44:53,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 11:44:53,999 INFO L87 Difference]: Start difference. First operand has 617 states, 483 states have (on average 1.5196687370600415) internal successors, (734), 502 states have internal predecessors, (734), 113 states have call successors, (113), 19 states have call predecessors, (113), 19 states have return successors, (113), 108 states have call predecessors, (113), 113 states have call successors, (113) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:44:54,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:44:54,143 INFO L93 Difference]: Finished difference Result 1237 states and 1975 transitions. [2021-12-14 11:44:54,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 11:44:54,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-14 11:44:54,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:44:54,157 INFO L225 Difference]: With dead ends: 1237 [2021-12-14 11:44:54,157 INFO L226 Difference]: Without dead ends: 610 [2021-12-14 11:44:54,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 11:44:54,168 INFO L933 BasicCegarLoop]: 928 mSDtfsCounter, 20 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1795 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:44:54,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 1795 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:44:54,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-12-14 11:44:54,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2021-12-14 11:44:54,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 478 states have (on average 1.4853556485355648) internal successors, (710), 495 states have internal predecessors, (710), 113 states have call successors, (113), 19 states have call predecessors, (113), 18 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2021-12-14 11:44:54,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 920 transitions. [2021-12-14 11:44:54,288 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 920 transitions. Word has length 19 [2021-12-14 11:44:54,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:44:54,288 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 920 transitions. [2021-12-14 11:44:54,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:44:54,289 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 920 transitions. [2021-12-14 11:44:54,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-14 11:44:54,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:44:54,290 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:44:54,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 11:44:54,290 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:44:54,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:44:54,291 INFO L85 PathProgramCache]: Analyzing trace with hash 405571933, now seen corresponding path program 1 times [2021-12-14 11:44:54,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:44:54,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520670799] [2021-12-14 11:44:54,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:44:54,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:44:54,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:44:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:44:54,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:44:54,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520670799] [2021-12-14 11:44:54,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520670799] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:44:54,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:44:54,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 11:44:54,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130441078] [2021-12-14 11:44:54,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:44:54,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 11:44:54,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:44:54,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 11:44:54,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 11:44:54,381 INFO L87 Difference]: Start difference. First operand 610 states and 920 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:44:54,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:44:54,521 INFO L93 Difference]: Finished difference Result 1123 states and 1681 transitions. [2021-12-14 11:44:54,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 11:44:54,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-14 11:44:54,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:44:54,531 INFO L225 Difference]: With dead ends: 1123 [2021-12-14 11:44:54,532 INFO L226 Difference]: Without dead ends: 882 [2021-12-14 11:44:54,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 11:44:54,537 INFO L933 BasicCegarLoop]: 1241 mSDtfsCounter, 834 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 1655 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:44:54,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [834 Valid, 1655 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:44:54,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-12-14 11:44:54,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 863. [2021-12-14 11:44:54,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 688 states have (on average 1.4651162790697674) internal successors, (1008), 691 states have internal predecessors, (1008), 142 states have call successors, (142), 33 states have call predecessors, (142), 32 states have return successors, (146), 140 states have call predecessors, (146), 130 states have call successors, (146) [2021-12-14 11:44:54,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1296 transitions. [2021-12-14 11:44:54,596 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1296 transitions. Word has length 21 [2021-12-14 11:44:54,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:44:54,597 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 1296 transitions. [2021-12-14 11:44:54,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:44:54,598 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1296 transitions. [2021-12-14 11:44:54,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-14 11:44:54,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:44:54,603 INFO L514 BasicCegarLoop]: 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] [2021-12-14 11:44:54,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 11:44:54,604 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:44:54,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:44:54,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1497789841, now seen corresponding path program 1 times [2021-12-14 11:44:54,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:44:54,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533991871] [2021-12-14 11:44:54,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:44:54,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:44:54,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:44:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:44:54,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:44:54,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533991871] [2021-12-14 11:44:54,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533991871] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:44:54,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:44:54,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 11:44:54,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21306303] [2021-12-14 11:44:54,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:44:54,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 11:44:54,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:44:54,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 11:44:54,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 11:44:54,691 INFO L87 Difference]: Start difference. First operand 863 states and 1296 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:44:54,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:44:54,800 INFO L93 Difference]: Finished difference Result 1823 states and 2803 transitions. [2021-12-14 11:44:54,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 11:44:54,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-14 11:44:54,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:44:54,807 INFO L225 Difference]: With dead ends: 1823 [2021-12-14 11:44:54,807 INFO L226 Difference]: Without dead ends: 1428 [2021-12-14 11:44:54,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 11:44:54,809 INFO L933 BasicCegarLoop]: 1422 mSDtfsCounter, 575 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 2288 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:44:54,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 2288 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:44:54,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-12-14 11:44:54,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1026. [2021-12-14 11:44:54,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 809 states have (on average 1.4536464771322621) internal successors, (1176), 811 states have internal predecessors, (1176), 170 states have call successors, (170), 46 states have call predecessors, (170), 46 states have return successors, (217), 170 states have call predecessors, (217), 158 states have call successors, (217) [2021-12-14 11:44:54,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1563 transitions. [2021-12-14 11:44:54,841 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1563 transitions. Word has length 28 [2021-12-14 11:44:54,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:44:54,841 INFO L470 AbstractCegarLoop]: Abstraction has 1026 states and 1563 transitions. [2021-12-14 11:44:54,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:44:54,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1563 transitions. [2021-12-14 11:44:54,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-14 11:44:54,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:44:54,842 INFO L514 BasicCegarLoop]: 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] [2021-12-14 11:44:54,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 11:44:54,842 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:44:54,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:44:54,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1577683242, now seen corresponding path program 1 times [2021-12-14 11:44:54,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:44:54,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114628062] [2021-12-14 11:44:54,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:44:54,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:44:54,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:44:54,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:44:54,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:44:54,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114628062] [2021-12-14 11:44:54,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114628062] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:44:54,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:44:54,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 11:44:54,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948278383] [2021-12-14 11:44:54,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:44:54,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 11:44:54,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:44:54,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 11:44:54,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 11:44:54,910 INFO L87 Difference]: Start difference. First operand 1026 states and 1563 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:44:54,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:44:54,949 INFO L93 Difference]: Finished difference Result 1670 states and 2499 transitions. [2021-12-14 11:44:54,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 11:44:54,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-14 11:44:54,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:44:54,956 INFO L225 Difference]: With dead ends: 1670 [2021-12-14 11:44:54,956 INFO L226 Difference]: Without dead ends: 1538 [2021-12-14 11:44:54,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 11:44:54,957 INFO L933 BasicCegarLoop]: 1151 mSDtfsCounter, 837 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:44:54,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [837 Valid, 1549 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:44:54,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-12-14 11:44:55,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1477. [2021-12-14 11:44:55,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1173 states have (on average 1.4578005115089514) internal successors, (1710), 1171 states have internal predecessors, (1710), 227 states have call successors, (227), 72 states have call predecessors, (227), 76 states have return successors, (298), 233 states have call predecessors, (298), 218 states have call successors, (298) [2021-12-14 11:44:55,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 2235 transitions. [2021-12-14 11:44:55,031 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 2235 transitions. Word has length 28 [2021-12-14 11:44:55,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:44:55,032 INFO L470 AbstractCegarLoop]: Abstraction has 1477 states and 2235 transitions. [2021-12-14 11:44:55,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:44:55,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 2235 transitions. [2021-12-14 11:44:55,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-14 11:44:55,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:44:55,033 INFO L514 BasicCegarLoop]: 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] [2021-12-14 11:44:55,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 11:44:55,033 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:44:55,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:44:55,034 INFO L85 PathProgramCache]: Analyzing trace with hash 574098819, now seen corresponding path program 1 times [2021-12-14 11:44:55,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:44:55,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648914148] [2021-12-14 11:44:55,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:44:55,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:44:55,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:44:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:44:55,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:44:55,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648914148] [2021-12-14 11:44:55,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648914148] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:44:55,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:44:55,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 11:44:55,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285232643] [2021-12-14 11:44:55,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:44:55,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 11:44:55,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:44:55,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 11:44:55,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 11:44:55,095 INFO L87 Difference]: Start difference. First operand 1477 states and 2235 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:44:55,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:44:55,540 INFO L93 Difference]: Finished difference Result 2654 states and 4047 transitions. [2021-12-14 11:44:55,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 11:44:55,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-14 11:44:55,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:44:55,548 INFO L225 Difference]: With dead ends: 2654 [2021-12-14 11:44:55,548 INFO L226 Difference]: Without dead ends: 1775 [2021-12-14 11:44:55,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 11:44:55,552 INFO L933 BasicCegarLoop]: 1164 mSDtfsCounter, 1408 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1410 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 11:44:55,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1410 Valid, 1476 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 11:44:55,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2021-12-14 11:44:55,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1465. [2021-12-14 11:44:55,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1163 states have (on average 1.4548581255374033) internal successors, (1692), 1161 states have internal predecessors, (1692), 225 states have call successors, (225), 70 states have call predecessors, (225), 76 states have return successors, (294), 233 states have call predecessors, (294), 216 states have call successors, (294) [2021-12-14 11:44:55,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 2211 transitions. [2021-12-14 11:44:55,601 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 2211 transitions. Word has length 29 [2021-12-14 11:44:55,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:44:55,602 INFO L470 AbstractCegarLoop]: Abstraction has 1465 states and 2211 transitions. [2021-12-14 11:44:55,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:44:55,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 2211 transitions. [2021-12-14 11:44:55,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-14 11:44:55,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:44:55,603 INFO L514 BasicCegarLoop]: 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] [2021-12-14 11:44:55,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 11:44:55,604 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:44:55,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:44:55,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1666004885, now seen corresponding path program 1 times [2021-12-14 11:44:55,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:44:55,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959217881] [2021-12-14 11:44:55,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:44:55,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:44:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:44:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:44:55,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:44:55,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959217881] [2021-12-14 11:44:55,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959217881] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:44:55,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:44:55,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 11:44:55,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624781015] [2021-12-14 11:44:55,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:44:55,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 11:44:55,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:44:55,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 11:44:55,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 11:44:55,673 INFO L87 Difference]: Start difference. First operand 1465 states and 2211 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:44:55,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:44:55,743 INFO L93 Difference]: Finished difference Result 1468 states and 2213 transitions. [2021-12-14 11:44:55,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 11:44:55,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-14 11:44:55,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:44:55,749 INFO L225 Difference]: With dead ends: 1468 [2021-12-14 11:44:55,749 INFO L226 Difference]: Without dead ends: 1464 [2021-12-14 11:44:55,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 11:44:55,752 INFO L933 BasicCegarLoop]: 879 mSDtfsCounter, 34 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1701 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:44:55,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1701 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:44:55,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-12-14 11:44:55,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1464. [2021-12-14 11:44:55,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1163 states have (on average 1.4531384350816854) internal successors, (1690), 1160 states have internal predecessors, (1690), 224 states have call successors, (224), 70 states have call predecessors, (224), 76 states have return successors, (294), 233 states have call predecessors, (294), 216 states have call successors, (294) [2021-12-14 11:44:55,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 2208 transitions. [2021-12-14 11:44:55,800 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 2208 transitions. Word has length 28 [2021-12-14 11:44:55,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:44:55,801 INFO L470 AbstractCegarLoop]: Abstraction has 1464 states and 2208 transitions. [2021-12-14 11:44:55,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:44:55,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 2208 transitions. [2021-12-14 11:44:55,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-14 11:44:55,804 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:44:55,804 INFO L514 BasicCegarLoop]: 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] [2021-12-14 11:44:55,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 11:44:55,804 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:44:55,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:44:55,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1579997021, now seen corresponding path program 1 times [2021-12-14 11:44:55,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:44:55,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864252422] [2021-12-14 11:44:55,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:44:55,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:44:55,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:44:55,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 11:44:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:44:55,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:44:55,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:44:55,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864252422] [2021-12-14 11:44:55,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864252422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:44:55,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:44:55,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 11:44:55,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850775587] [2021-12-14 11:44:55,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:44:55,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 11:44:55,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:44:55,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 11:44:55,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 11:44:55,920 INFO L87 Difference]: Start difference. First operand 1464 states and 2208 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 11:45:00,349 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 11:45:02,918 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 11:45:04,970 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 11:45:07,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:45:07,206 INFO L93 Difference]: Finished difference Result 2260 states and 3359 transitions. [2021-12-14 11:45:07,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 11:45:07,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-12-14 11:45:07,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:45:07,213 INFO L225 Difference]: With dead ends: 2260 [2021-12-14 11:45:07,213 INFO L226 Difference]: Without dead ends: 1239 [2021-12-14 11:45:07,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 11:45:07,215 INFO L933 BasicCegarLoop]: 949 mSDtfsCounter, 793 mSDsluCounter, 1591 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 287 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 2540 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2021-12-14 11:45:07,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [796 Valid, 2540 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 456 Invalid, 3 Unknown, 0 Unchecked, 11.2s Time] [2021-12-14 11:45:07,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2021-12-14 11:45:07,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1097. [2021-12-14 11:45:07,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 872 states have (on average 1.4311926605504588) internal successors, (1248), 871 states have internal predecessors, (1248), 163 states have call successors, (163), 55 states have call predecessors, (163), 61 states have return successors, (215), 170 states have call predecessors, (215), 155 states have call successors, (215) [2021-12-14 11:45:07,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1626 transitions. [2021-12-14 11:45:07,248 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1626 transitions. Word has length 41 [2021-12-14 11:45:07,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:45:07,248 INFO L470 AbstractCegarLoop]: Abstraction has 1097 states and 1626 transitions. [2021-12-14 11:45:07,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 11:45:07,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1626 transitions. [2021-12-14 11:45:07,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-14 11:45:07,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:45:07,249 INFO L514 BasicCegarLoop]: 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] [2021-12-14 11:45:07,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 11:45:07,252 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:45:07,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:45:07,253 INFO L85 PathProgramCache]: Analyzing trace with hash -9397451, now seen corresponding path program 1 times [2021-12-14 11:45:07,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:45:07,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799923859] [2021-12-14 11:45:07,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:45:07,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:45:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:07,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:45:07,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:45:07,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799923859] [2021-12-14 11:45:07,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799923859] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:45:07,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:45:07,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 11:45:07,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562151303] [2021-12-14 11:45:07,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:45:07,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 11:45:07,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:45:07,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 11:45:07,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 11:45:07,331 INFO L87 Difference]: Start difference. First operand 1097 states and 1626 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:45:07,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:45:07,641 INFO L93 Difference]: Finished difference Result 1158 states and 1706 transitions. [2021-12-14 11:45:07,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 11:45:07,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-14 11:45:07,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:45:07,645 INFO L225 Difference]: With dead ends: 1158 [2021-12-14 11:45:07,645 INFO L226 Difference]: Without dead ends: 1114 [2021-12-14 11:45:07,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 11:45:07,646 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 912 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 912 SdHoareTripleChecker+Valid, 1526 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 11:45:07,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [912 Valid, 1526 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 11:45:07,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-12-14 11:45:07,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1097. [2021-12-14 11:45:07,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 872 states have (on average 1.4288990825688073) internal successors, (1246), 871 states have internal predecessors, (1246), 163 states have call successors, (163), 55 states have call predecessors, (163), 61 states have return successors, (215), 170 states have call predecessors, (215), 155 states have call successors, (215) [2021-12-14 11:45:07,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1624 transitions. [2021-12-14 11:45:07,707 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1624 transitions. Word has length 37 [2021-12-14 11:45:07,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:45:07,709 INFO L470 AbstractCegarLoop]: Abstraction has 1097 states and 1624 transitions. [2021-12-14 11:45:07,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:45:07,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1624 transitions. [2021-12-14 11:45:07,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-14 11:45:07,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:45:07,711 INFO L514 BasicCegarLoop]: 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] [2021-12-14 11:45:07,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 11:45:07,712 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:45:07,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:45:07,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1221971472, now seen corresponding path program 1 times [2021-12-14 11:45:07,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:45:07,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051926290] [2021-12-14 11:45:07,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:45:07,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:45:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:45:07,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:45:07,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051926290] [2021-12-14 11:45:07,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051926290] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:45:07,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:45:07,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 11:45:07,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591378695] [2021-12-14 11:45:07,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:45:07,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 11:45:07,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:45:07,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 11:45:07,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 11:45:07,798 INFO L87 Difference]: Start difference. First operand 1097 states and 1624 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:45:08,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:45:08,090 INFO L93 Difference]: Finished difference Result 1148 states and 1689 transitions. [2021-12-14 11:45:08,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 11:45:08,091 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-14 11:45:08,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:45:08,095 INFO L225 Difference]: With dead ends: 1148 [2021-12-14 11:45:08,095 INFO L226 Difference]: Without dead ends: 1076 [2021-12-14 11:45:08,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 11:45:08,098 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 893 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 1525 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 11:45:08,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [893 Valid, 1525 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 11:45:08,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2021-12-14 11:45:08,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 1074. [2021-12-14 11:45:08,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 851 states have (on average 1.434782608695652) internal successors, (1221), 857 states have internal predecessors, (1221), 163 states have call successors, (163), 55 states have call predecessors, (163), 59 states have return successors, (206), 161 states have call predecessors, (206), 155 states have call successors, (206) [2021-12-14 11:45:08,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1590 transitions. [2021-12-14 11:45:08,139 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1590 transitions. Word has length 39 [2021-12-14 11:45:08,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:45:08,139 INFO L470 AbstractCegarLoop]: Abstraction has 1074 states and 1590 transitions. [2021-12-14 11:45:08,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:45:08,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1590 transitions. [2021-12-14 11:45:08,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-14 11:45:08,141 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:45:08,141 INFO L514 BasicCegarLoop]: 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] [2021-12-14 11:45:08,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 11:45:08,142 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:45:08,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:45:08,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1795960592, now seen corresponding path program 1 times [2021-12-14 11:45:08,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:45:08,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726482833] [2021-12-14 11:45:08,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:45:08,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:45:08,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:45:08,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:45:08,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726482833] [2021-12-14 11:45:08,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726482833] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:45:08,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:45:08,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 11:45:08,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530698239] [2021-12-14 11:45:08,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:45:08,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 11:45:08,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:45:08,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 11:45:08,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 11:45:08,217 INFO L87 Difference]: Start difference. First operand 1074 states and 1590 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:45:08,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:45:08,657 INFO L93 Difference]: Finished difference Result 1358 states and 2005 transitions. [2021-12-14 11:45:08,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 11:45:08,658 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-14 11:45:08,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:45:08,664 INFO L225 Difference]: With dead ends: 1358 [2021-12-14 11:45:08,664 INFO L226 Difference]: Without dead ends: 1349 [2021-12-14 11:45:08,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 11:45:08,666 INFO L933 BasicCegarLoop]: 1172 mSDtfsCounter, 1143 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 1819 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 11:45:08,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1152 Valid, 1819 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 11:45:08,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2021-12-14 11:45:08,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 1090. [2021-12-14 11:45:08,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 866 states have (on average 1.430715935334873) internal successors, (1239), 872 states have internal predecessors, (1239), 163 states have call successors, (163), 55 states have call predecessors, (163), 60 states have return successors, (206), 162 states have call predecessors, (206), 155 states have call successors, (206) [2021-12-14 11:45:08,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1608 transitions. [2021-12-14 11:45:08,705 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1608 transitions. Word has length 39 [2021-12-14 11:45:08,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:45:08,705 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 1608 transitions. [2021-12-14 11:45:08,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:45:08,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1608 transitions. [2021-12-14 11:45:08,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-14 11:45:08,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:45:08,707 INFO L514 BasicCegarLoop]: 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] [2021-12-14 11:45:08,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 11:45:08,708 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:45:08,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:45:08,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1796237422, now seen corresponding path program 1 times [2021-12-14 11:45:08,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:45:08,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127741412] [2021-12-14 11:45:08,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:45:08,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:45:08,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:45:08,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:45:08,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127741412] [2021-12-14 11:45:08,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127741412] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:45:08,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:45:08,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 11:45:08,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862467871] [2021-12-14 11:45:08,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:45:08,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 11:45:08,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:45:08,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 11:45:08,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 11:45:08,764 INFO L87 Difference]: Start difference. First operand 1090 states and 1608 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:45:08,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:45:08,824 INFO L93 Difference]: Finished difference Result 1192 states and 1745 transitions. [2021-12-14 11:45:08,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 11:45:08,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-14 11:45:08,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:45:08,829 INFO L225 Difference]: With dead ends: 1192 [2021-12-14 11:45:08,830 INFO L226 Difference]: Without dead ends: 1164 [2021-12-14 11:45:08,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 11:45:08,832 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 867 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:45:08,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [867 Valid, 938 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:45:08,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-12-14 11:45:08,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1141. [2021-12-14 11:45:08,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 913 states have (on average 1.429353778751369) internal successors, (1305), 919 states have internal predecessors, (1305), 164 states have call successors, (164), 56 states have call predecessors, (164), 63 states have return successors, (209), 165 states have call predecessors, (209), 156 states have call successors, (209) [2021-12-14 11:45:08,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 1678 transitions. [2021-12-14 11:45:08,875 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 1678 transitions. Word has length 39 [2021-12-14 11:45:08,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:45:08,876 INFO L470 AbstractCegarLoop]: Abstraction has 1141 states and 1678 transitions. [2021-12-14 11:45:08,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:45:08,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 1678 transitions. [2021-12-14 11:45:08,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-14 11:45:08,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:45:08,878 INFO L514 BasicCegarLoop]: 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] [2021-12-14 11:45:08,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 11:45:08,878 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:45:08,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:45:08,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1810582331, now seen corresponding path program 1 times [2021-12-14 11:45:08,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:45:08,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695391621] [2021-12-14 11:45:08,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:45:08,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:45:08,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:08,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:45:08,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:45:08,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695391621] [2021-12-14 11:45:08,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695391621] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:45:08,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:45:08,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 11:45:08,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574776328] [2021-12-14 11:45:08,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:45:08,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 11:45:08,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:45:08,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 11:45:08,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 11:45:08,934 INFO L87 Difference]: Start difference. First operand 1141 states and 1678 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:45:09,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:45:09,012 INFO L93 Difference]: Finished difference Result 1402 states and 2062 transitions. [2021-12-14 11:45:09,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 11:45:09,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-14 11:45:09,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:45:09,020 INFO L225 Difference]: With dead ends: 1402 [2021-12-14 11:45:09,020 INFO L226 Difference]: Without dead ends: 1389 [2021-12-14 11:45:09,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 11:45:09,022 INFO L933 BasicCegarLoop]: 1188 mSDtfsCounter, 353 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 2000 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:45:09,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 2000 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:45:09,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2021-12-14 11:45:09,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 1138. [2021-12-14 11:45:09,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 910 states have (on average 1.4263736263736264) internal successors, (1298), 916 states have internal predecessors, (1298), 164 states have call successors, (164), 56 states have call predecessors, (164), 63 states have return successors, (209), 165 states have call predecessors, (209), 156 states have call successors, (209) [2021-12-14 11:45:09,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1671 transitions. [2021-12-14 11:45:09,068 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1671 transitions. Word has length 39 [2021-12-14 11:45:09,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:45:09,068 INFO L470 AbstractCegarLoop]: Abstraction has 1138 states and 1671 transitions. [2021-12-14 11:45:09,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:45:09,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1671 transitions. [2021-12-14 11:45:09,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-14 11:45:09,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:45:09,070 INFO L514 BasicCegarLoop]: 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] [2021-12-14 11:45:09,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 11:45:09,070 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:45:09,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:45:09,070 INFO L85 PathProgramCache]: Analyzing trace with hash -935716902, now seen corresponding path program 1 times [2021-12-14 11:45:09,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:45:09,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632889423] [2021-12-14 11:45:09,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:45:09,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:45:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:09,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-14 11:45:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:09,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:45:09,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:45:09,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632889423] [2021-12-14 11:45:09,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632889423] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:45:09,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:45:09,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 11:45:09,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725815940] [2021-12-14 11:45:09,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:45:09,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 11:45:09,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:45:09,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 11:45:09,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 11:45:09,166 INFO L87 Difference]: Start difference. First operand 1138 states and 1671 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 11:45:12,946 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 11:45:16,435 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 11:45:19,563 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 [] [2021-12-14 11:45:19,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:45:19,682 INFO L93 Difference]: Finished difference Result 1761 states and 2599 transitions. [2021-12-14 11:45:19,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 11:45:19,686 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-12-14 11:45:19,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:45:19,690 INFO L225 Difference]: With dead ends: 1761 [2021-12-14 11:45:19,690 INFO L226 Difference]: Without dead ends: 1129 [2021-12-14 11:45:19,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 11:45:19,692 INFO L933 BasicCegarLoop]: 851 mSDtfsCounter, 910 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 135 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2021-12-14 11:45:19,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [970 Valid, 1246 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 324 Invalid, 2 Unknown, 0 Unchecked, 10.4s Time] [2021-12-14 11:45:19,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2021-12-14 11:45:19,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 1070. [2021-12-14 11:45:19,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 849 states have (on average 1.4204946996466432) internal successors, (1206), 853 states have internal predecessors, (1206), 161 states have call successors, (161), 55 states have call predecessors, (161), 59 states have return successors, (205), 161 states have call predecessors, (205), 155 states have call successors, (205) [2021-12-14 11:45:19,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1572 transitions. [2021-12-14 11:45:19,734 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1572 transitions. Word has length 42 [2021-12-14 11:45:19,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:45:19,734 INFO L470 AbstractCegarLoop]: Abstraction has 1070 states and 1572 transitions. [2021-12-14 11:45:19,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 11:45:19,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1572 transitions. [2021-12-14 11:45:19,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-14 11:45:19,735 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:45:19,735 INFO L514 BasicCegarLoop]: 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] [2021-12-14 11:45:19,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 11:45:19,736 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:45:19,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:45:19,736 INFO L85 PathProgramCache]: Analyzing trace with hash 159691478, now seen corresponding path program 1 times [2021-12-14 11:45:19,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:45:19,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282942054] [2021-12-14 11:45:19,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:45:19,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:45:19,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:19,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:45:19,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:45:19,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282942054] [2021-12-14 11:45:19,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282942054] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:45:19,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:45:19,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 11:45:19,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199123661] [2021-12-14 11:45:19,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:45:19,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 11:45:19,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:45:19,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 11:45:19,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 11:45:19,806 INFO L87 Difference]: Start difference. First operand 1070 states and 1572 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:45:19,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:45:19,922 INFO L93 Difference]: Finished difference Result 1082 states and 1584 transitions. [2021-12-14 11:45:19,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 11:45:19,923 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-14 11:45:19,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:45:19,928 INFO L225 Difference]: With dead ends: 1082 [2021-12-14 11:45:19,928 INFO L226 Difference]: Without dead ends: 1054 [2021-12-14 11:45:19,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-14 11:45:19,929 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 34 mSDsluCounter, 3425 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 4293 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:45:19,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 4293 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:45:19,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-12-14 11:45:19,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1054. [2021-12-14 11:45:19,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 833 states have (on average 1.424969987995198) internal successors, (1187), 837 states have internal predecessors, (1187), 161 states have call successors, (161), 55 states have call predecessors, (161), 59 states have return successors, (205), 161 states have call predecessors, (205), 155 states have call successors, (205) [2021-12-14 11:45:19,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1553 transitions. [2021-12-14 11:45:19,967 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1553 transitions. Word has length 40 [2021-12-14 11:45:19,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:45:19,967 INFO L470 AbstractCegarLoop]: Abstraction has 1054 states and 1553 transitions. [2021-12-14 11:45:19,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:45:19,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1553 transitions. [2021-12-14 11:45:19,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-14 11:45:19,969 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:45:19,969 INFO L514 BasicCegarLoop]: 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] [2021-12-14 11:45:19,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 11:45:19,969 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:45:19,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:45:19,970 INFO L85 PathProgramCache]: Analyzing trace with hash 209462248, now seen corresponding path program 1 times [2021-12-14 11:45:19,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:45:19,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562555779] [2021-12-14 11:45:19,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:45:19,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:45:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:20,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 11:45:20,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:20,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-14 11:45:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:20,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:45:20,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:45:20,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562555779] [2021-12-14 11:45:20,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562555779] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:45:20,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:45:20,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 11:45:20,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178213075] [2021-12-14 11:45:20,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:45:20,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 11:45:20,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:45:20,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 11:45:20,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 11:45:20,072 INFO L87 Difference]: Start difference. First operand 1054 states and 1553 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 11:45:24,619 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 11:45:27,657 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 11:45:29,699 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 11:45:31,535 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 11:45:31,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:45:31,599 INFO L93 Difference]: Finished difference Result 1720 states and 2550 transitions. [2021-12-14 11:45:31,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 11:45:31,601 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2021-12-14 11:45:31,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:45:31,606 INFO L225 Difference]: With dead ends: 1720 [2021-12-14 11:45:31,606 INFO L226 Difference]: Without dead ends: 1185 [2021-12-14 11:45:31,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-14 11:45:31,609 INFO L933 BasicCegarLoop]: 904 mSDtfsCounter, 594 mSDsluCounter, 1481 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 264 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 2385 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2021-12-14 11:45:31,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 2385 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 572 Invalid, 2 Unknown, 0 Unchecked, 11.4s Time] [2021-12-14 11:45:31,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2021-12-14 11:45:31,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1021. [2021-12-14 11:45:31,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 808 states have (on average 1.4245049504950495) internal successors, (1151), 815 states have internal predecessors, (1151), 156 states have call successors, (156), 51 states have call predecessors, (156), 56 states have return successors, (212), 154 states have call predecessors, (212), 150 states have call successors, (212) [2021-12-14 11:45:31,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1519 transitions. [2021-12-14 11:45:31,689 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1519 transitions. Word has length 49 [2021-12-14 11:45:31,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:45:31,689 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 1519 transitions. [2021-12-14 11:45:31,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 11:45:31,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1519 transitions. [2021-12-14 11:45:31,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-14 11:45:31,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:45:31,691 INFO L514 BasicCegarLoop]: 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] [2021-12-14 11:45:31,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 11:45:31,691 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:45:31,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:45:31,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1748370751, now seen corresponding path program 1 times [2021-12-14 11:45:31,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:45:31,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099310438] [2021-12-14 11:45:31,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:45:31,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:45:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:31,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 11:45:31,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:31,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 11:45:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:31,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:45:31,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:45:31,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099310438] [2021-12-14 11:45:31,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099310438] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:45:31,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:45:31,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 11:45:31,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535645892] [2021-12-14 11:45:31,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:45:31,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 11:45:31,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:45:31,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 11:45:31,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 11:45:31,765 INFO L87 Difference]: Start difference. First operand 1021 states and 1519 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 11:45:36,607 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 11:45:39,288 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 11:45:41,330 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 11:45:43,442 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 11:45:45,465 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 11:45:45,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:45:45,541 INFO L93 Difference]: Finished difference Result 1133 states and 1690 transitions. [2021-12-14 11:45:45,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 11:45:45,544 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2021-12-14 11:45:45,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:45:45,548 INFO L225 Difference]: With dead ends: 1133 [2021-12-14 11:45:45,549 INFO L226 Difference]: Without dead ends: 1105 [2021-12-14 11:45:45,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 11:45:45,550 INFO L933 BasicCegarLoop]: 828 mSDtfsCounter, 280 mSDsluCounter, 1629 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 253 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 2457 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2021-12-14 11:45:45,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 2457 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 581 Invalid, 4 Unknown, 0 Unchecked, 13.7s Time] [2021-12-14 11:45:45,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-12-14 11:45:45,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 1022. [2021-12-14 11:45:45,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 809 states have (on average 1.4239802224969098) internal successors, (1152), 816 states have internal predecessors, (1152), 156 states have call successors, (156), 51 states have call predecessors, (156), 56 states have return successors, (212), 154 states have call predecessors, (212), 150 states have call successors, (212) [2021-12-14 11:45:45,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 1520 transitions. [2021-12-14 11:45:45,598 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 1520 transitions. Word has length 49 [2021-12-14 11:45:45,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:45:45,598 INFO L470 AbstractCegarLoop]: Abstraction has 1022 states and 1520 transitions. [2021-12-14 11:45:45,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 11:45:45,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 1520 transitions. [2021-12-14 11:45:45,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-14 11:45:45,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:45:45,600 INFO L514 BasicCegarLoop]: 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] [2021-12-14 11:45:45,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 11:45:45,600 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:45:45,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:45:45,601 INFO L85 PathProgramCache]: Analyzing trace with hash -2123894719, now seen corresponding path program 1 times [2021-12-14 11:45:45,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:45:45,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918790404] [2021-12-14 11:45:45,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:45:45,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:45:45,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:45,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 11:45:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:45,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 11:45:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:45,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:45:45,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:45:45,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918790404] [2021-12-14 11:45:45,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918790404] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:45:45,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:45:45,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 11:45:45,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113815230] [2021-12-14 11:45:45,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:45:45,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 11:45:45,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:45:45,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 11:45:45,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 11:45:45,681 INFO L87 Difference]: Start difference. First operand 1022 states and 1520 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 11:45:49,726 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 11:45:51,167 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 11:45:52,581 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 11:45:53,926 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []