./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-qlogic-qla3xxx.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5f08f0f0 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/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-qlogic-qla3xxx.cil.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-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 64bit --witnessprinter.graph.data.programhash 5663310b82fa3e5d48c5bcacd13ac8ac886029c41a2f8f3bd2b8442c496a9447 --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5f08f0f [2021-11-05 20:49:54,212 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-05 20:49:54,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-05 20:49:54,251 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-05 20:49:54,251 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-05 20:49:54,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-05 20:49:54,256 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-05 20:49:54,260 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-05 20:49:54,263 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-05 20:49:54,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-05 20:49:54,268 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-05 20:49:54,277 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-05 20:49:54,277 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-05 20:49:54,279 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-05 20:49:54,281 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-05 20:49:54,284 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-05 20:49:54,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-05 20:49:54,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-05 20:49:54,288 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-05 20:49:54,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-05 20:49:54,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-05 20:49:54,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-05 20:49:54,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-05 20:49:54,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-05 20:49:54,301 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-05 20:49:54,301 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-05 20:49:54,302 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-05 20:49:54,302 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-05 20:49:54,302 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-05 20:49:54,303 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-05 20:49:54,303 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-05 20:49:54,304 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-05 20:49:54,304 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-05 20:49:54,305 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-05 20:49:54,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-05 20:49:54,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-05 20:49:54,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-05 20:49:54,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-05 20:49:54,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-05 20:49:54,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-05 20:49:54,307 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-05 20:49:54,308 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-05 20:49:54,330 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-05 20:49:54,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-05 20:49:54,331 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-05 20:49:54,331 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-05 20:49:54,333 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-05 20:49:54,333 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-05 20:49:54,333 INFO L138 SettingsManager]: * Use SBE=true [2021-11-05 20:49:54,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-05 20:49:54,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-05 20:49:54,333 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-05 20:49:54,334 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-05 20:49:54,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-05 20:49:54,334 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-05 20:49:54,334 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-05 20:49:54,335 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-05 20:49:54,335 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-05 20:49:54,335 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-05 20:49:54,335 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-05 20:49:54,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-05 20:49:54,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-05 20:49:54,336 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-05 20:49:54,336 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-05 20:49:54,336 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-05 20:49:54,336 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-05 20:49:54,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-05 20:49:54,336 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-05 20:49:54,337 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-05 20:49:54,337 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-05 20:49:54,337 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-05 20:49:54,337 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5663310b82fa3e5d48c5bcacd13ac8ac886029c41a2f8f3bd2b8442c496a9447 [2021-11-05 20:49:54,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-05 20:49:54,575 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-05 20:49:54,577 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-05 20:49:54,578 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-05 20:49:54,578 INFO L275 PluginConnector]: CDTParser initialized [2021-11-05 20:49:54,579 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-qlogic-qla3xxx.cil.i [2021-11-05 20:49:54,615 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f991d0ed0/f5b7541a5c7a43f7bb66018728c832f1/FLAG919145f89 [2021-11-05 20:49:55,290 INFO L306 CDTParser]: Found 1 translation units. [2021-11-05 20:49:55,291 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-qlogic-qla3xxx.cil.i [2021-11-05 20:49:55,333 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f991d0ed0/f5b7541a5c7a43f7bb66018728c832f1/FLAG919145f89 [2021-11-05 20:49:55,424 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f991d0ed0/f5b7541a5c7a43f7bb66018728c832f1 [2021-11-05 20:49:55,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-05 20:49:55,428 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-05 20:49:55,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-05 20:49:55,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-05 20:49:55,441 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-05 20:49:55,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.11 08:49:55" (1/1) ... [2021-11-05 20:49:55,443 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f2574f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 08:49:55, skipping insertion in model container [2021-11-05 20:49:55,443 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.11 08:49:55" (1/1) ... [2021-11-05 20:49:55,447 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-05 20:49:55,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-05 20:49:58,037 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-qlogic-qla3xxx.cil.i[408897,408910] [2021-11-05 20:49:58,040 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-qlogic-qla3xxx.cil.i[409066,409079] [2021-11-05 20:49:58,040 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-qlogic-qla3xxx.cil.i[409233,409246] [2021-11-05 20:49:58,040 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-qlogic-qla3xxx.cil.i[409401,409414] [2021-11-05 20:49:58,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-05 20:49:58,081 INFO L203 MainTranslator]: Completed pre-run [2021-11-05 20:49:58,391 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-qlogic-qla3xxx.cil.i[408897,408910] [2021-11-05 20:49:58,393 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-qlogic-qla3xxx.cil.i[409066,409079] [2021-11-05 20:49:58,393 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-qlogic-qla3xxx.cil.i[409233,409246] [2021-11-05 20:49:58,393 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-qlogic-qla3xxx.cil.i[409401,409414] [2021-11-05 20:49:58,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-05 20:49:58,573 INFO L208 MainTranslator]: Completed translation [2021-11-05 20:49:58,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 08:49:58 WrapperNode [2021-11-05 20:49:58,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-05 20:49:58,575 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-05 20:49:58,575 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-05 20:49:58,576 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-05 20:49:58,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 08:49:58" (1/1) ... [2021-11-05 20:49:58,684 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 08:49:58" (1/1) ... [2021-11-05 20:50:07,524 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-05 20:50:07,525 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-05 20:50:07,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-05 20:50:07,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-05 20:50:07,531 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 08:49:58" (1/1) ... [2021-11-05 20:50:07,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 08:49:58" (1/1) ... [2021-11-05 20:50:08,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 08:49:58" (1/1) ... [2021-11-05 20:50:08,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 08:49:58" (1/1) ... [2021-11-05 20:50:10,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 08:49:58" (1/1) ... [2021-11-05 20:50:10,929 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 08:49:58" (1/1) ... [2021-11-05 20:50:11,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 08:49:58" (1/1) ... [2021-11-05 20:50:11,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-05 20:50:11,789 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-05 20:50:11,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-05 20:50:11,790 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-05 20:50:11,790 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 08:49:58" (1/1) ... [2021-11-05 20:50:11,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-05 20:50:11,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 20:50:11,824 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) [2021-11-05 20:50:11,839 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 [2021-11-05 20:50:11,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-05 20:50:11,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-05 20:50:11,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-05 20:50:11,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-05 20:50:11,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-05 20:50:11,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-05 20:50:11,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-05 20:50:11,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-05 20:50:11,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-05 20:50:11,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-05 20:50:11,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-05 20:50:11,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-05 20:50:11,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-05 20:50:11,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-05 20:50:11,854 INFO L130 BoogieDeclarations]: Found specification of procedure delayed_work_timer_fn [2021-11-05 20:50:11,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-05 20:52:09,920 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_0_switch_break#2: ldv_switch_0_#res := 0; [2021-11-05 20:52:09,921 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_0_switch_break: ldv_switch_0_#res := 0; [2021-11-05 20:52:09,922 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_1_switch_break#2: ldv_switch_1_#res := 0; [2021-11-05 20:52:09,922 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_1_switch_break#3: ldv_switch_1_#res := 0; [2021-11-05 20:52:09,922 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_1_switch_break: ldv_switch_1_#res := 0; [2021-11-05 20:52:09,923 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-05 20:52:10,200 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-05 20:52:10,200 INFO L299 CfgBuilder]: Removed 57606 assume(true) statements. [2021-11-05 20:52:10,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.11 08:52:10 BoogieIcfgContainer [2021-11-05 20:52:10,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-05 20:52:10,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-05 20:52:10,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-05 20:52:10,249 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-05 20:52:10,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.11 08:49:55" (1/3) ... [2021-11-05 20:52:10,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@726c0212 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.11 08:52:10, skipping insertion in model container [2021-11-05 20:52:10,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 08:49:58" (2/3) ... [2021-11-05 20:52:10,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@726c0212 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.11 08:52:10, skipping insertion in model container [2021-11-05 20:52:10,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.11 08:52:10" (3/3) ... [2021-11-05 20:52:10,250 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-qlogic-qla3xxx.cil.i [2021-11-05 20:52:10,253 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-05 20:52:10,254 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 141 error locations. [2021-11-05 20:52:10,382 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-05 20:52:10,387 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 [2021-11-05 20:52:10,387 INFO L340 AbstractCegarLoop]: Starting to check reachability of 141 error locations. [2021-11-05 20:52:10,805 INFO L276 IsEmpty]: Start isEmpty. Operand has 42290 states, 42149 states have (on average 1.2542646326128735) internal successors, (52866), 42289 states have internal predecessors, (52866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 20:52:10,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-05 20:52:10,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 20:52:10,812 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] [2021-11-05 20:52:10,813 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 138 more)] === [2021-11-05 20:52:10,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 20:52:10,816 INFO L85 PathProgramCache]: Analyzing trace with hash 103332009, now seen corresponding path program 1 times [2021-11-05 20:52:10,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 20:52:10,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656652463] [2021-11-05 20:52:10,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 20:52:10,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 20:52:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 20:52:11,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 20:52:11,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 20:52:11,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656652463] [2021-11-05 20:52:11,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656652463] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 20:52:11,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 20:52:11,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 20:52:11,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314004446] [2021-11-05 20:52:11,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 20:52:11,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 20:52:11,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 20:52:11,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 20:52:11,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 20:52:11,425 INFO L87 Difference]: Start difference. First operand has 42290 states, 42149 states have (on average 1.2542646326128735) internal successors, (52866), 42289 states have internal predecessors, (52866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 20:52:13,477 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 20:52:15,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 20:52:15,809 INFO L93 Difference]: Finished difference Result 126554 states and 158197 transitions. [2021-11-05 20:52:15,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 20:52:15,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-05 20:52:15,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 20:52:16,080 INFO L225 Difference]: With dead ends: 126554 [2021-11-05 20:52:16,080 INFO L226 Difference]: Without dead ends: 83797 [2021-11-05 20:52:16,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.22ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 20:52:16,193 INFO L933 BasicCegarLoop]: 52599 mSDtfsCounter, 52360 mSDsluCounter, 52559 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2069.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52360 SdHoareTripleChecker+Valid, 105158 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 148.51ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2248.95ms IncrementalHoareTripleChecker+Time [2021-11-05 20:52:16,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52360 Valid, 105158 Invalid, 14 Unknown, 0 Unchecked, 148.51ms Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 1 Unknown, 0 Unchecked, 2248.95ms Time] [2021-11-05 20:52:16,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83797 states. [2021-11-05 20:52:18,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83797 to 83567. [2021-11-05 20:52:18,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83567 states, 83426 states have (on average 1.243221537650133) internal successors, (103717), 83566 states have internal predecessors, (103717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 20:52:18,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83567 states to 83567 states and 103717 transitions. [2021-11-05 20:52:18,425 INFO L78 Accepts]: Start accepts. Automaton has 83567 states and 103717 transitions. Word has length 39 [2021-11-05 20:52:18,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 20:52:18,425 INFO L470 AbstractCegarLoop]: Abstraction has 83567 states and 103717 transitions. [2021-11-05 20:52:18,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 20:52:18,426 INFO L276 IsEmpty]: Start isEmpty. Operand 83567 states and 103717 transitions. [2021-11-05 20:52:18,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-05 20:52:18,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 20:52:18,428 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] [2021-11-05 20:52:18,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-05 20:52:18,428 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 138 more)] === [2021-11-05 20:52:18,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 20:52:18,429 INFO L85 PathProgramCache]: Analyzing trace with hash -2012062014, now seen corresponding path program 1 times [2021-11-05 20:52:18,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 20:52:18,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698511753] [2021-11-05 20:52:18,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 20:52:18,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 20:52:18,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 20:52:18,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 20:52:18,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 20:52:18,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698511753] [2021-11-05 20:52:18,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698511753] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 20:52:18,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 20:52:18,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 20:52:18,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550122040] [2021-11-05 20:52:18,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 20:52:18,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 20:52:18,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 20:52:18,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 20:52:18,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 20:52:18,618 INFO L87 Difference]: Start difference. First operand 83567 states and 103717 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 20:52:20,657 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 20:52:23,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 20:52:23,578 INFO L93 Difference]: Finished difference Result 243877 states and 302463 transitions. [2021-11-05 20:52:23,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 20:52:23,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-05 20:52:23,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 20:52:23,980 INFO L225 Difference]: With dead ends: 243877 [2021-11-05 20:52:23,981 INFO L226 Difference]: Without dead ends: 160378 [2021-11-05 20:52:24,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.18ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 20:52:24,138 INFO L933 BasicCegarLoop]: 51998 mSDtfsCounter, 51768 mSDsluCounter, 47843 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2233.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 51768 SdHoareTripleChecker+Valid, 99841 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 75.41ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2399.20ms IncrementalHoareTripleChecker+Time [2021-11-05 20:52:24,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51768 Valid, 99841 Invalid, 93 Unknown, 0 Unchecked, 75.41ms Time], IncrementalHoareTripleChecker [32 Valid, 60 Invalid, 1 Unknown, 0 Unchecked, 2399.20ms Time] [2021-11-05 20:52:24,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160378 states. [2021-11-05 20:52:27,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160378 to 159286. [2021-11-05 20:52:27,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159286 states, 159145 states have (on average 1.2421942253919382) internal successors, (197689), 159285 states have internal predecessors, (197689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 20:52:27,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159286 states to 159286 states and 197689 transitions. [2021-11-05 20:52:27,664 INFO L78 Accepts]: Start accepts. Automaton has 159286 states and 197689 transitions. Word has length 40 [2021-11-05 20:52:27,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 20:52:27,664 INFO L470 AbstractCegarLoop]: Abstraction has 159286 states and 197689 transitions. [2021-11-05 20:52:27,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 20:52:27,665 INFO L276 IsEmpty]: Start isEmpty. Operand 159286 states and 197689 transitions. [2021-11-05 20:52:27,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-05 20:52:27,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 20:52:27,667 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] [2021-11-05 20:52:27,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-05 20:52:27,667 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 138 more)] === [2021-11-05 20:52:27,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 20:52:27,668 INFO L85 PathProgramCache]: Analyzing trace with hash -2065747957, now seen corresponding path program 1 times [2021-11-05 20:52:27,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 20:52:27,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629521652] [2021-11-05 20:52:27,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 20:52:27,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 20:52:27,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 20:52:27,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 20:52:27,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 20:52:27,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629521652] [2021-11-05 20:52:27,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629521652] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 20:52:27,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 20:52:27,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 20:52:27,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266832811] [2021-11-05 20:52:27,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 20:52:27,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 20:52:27,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 20:52:27,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 20:52:27,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 20:52:27,851 INFO L87 Difference]: Start difference. First operand 159286 states and 197689 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 20:52:29,891 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 20:52:32,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 20:52:32,388 INFO L93 Difference]: Finished difference Result 242867 states and 301344 transitions. [2021-11-05 20:52:32,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 20:52:32,389 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-05 20:52:32,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 20:52:32,535 INFO L225 Difference]: With dead ends: 242867 [2021-11-05 20:52:32,536 INFO L226 Difference]: Without dead ends: 83649 [2021-11-05 20:52:32,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.88ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 20:52:32,711 INFO L933 BasicCegarLoop]: 52152 mSDtfsCounter, 1752 mSDsluCounter, 51914 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2190.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1752 SdHoareTripleChecker+Valid, 104066 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 45.85ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2359.01ms IncrementalHoareTripleChecker+Time [2021-11-05 20:52:32,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1752 Valid, 104066 Invalid, 94 Unknown, 0 Unchecked, 45.85ms Time], IncrementalHoareTripleChecker [19 Valid, 74 Invalid, 1 Unknown, 0 Unchecked, 2359.01ms Time] [2021-11-05 20:52:32,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83649 states. [2021-11-05 20:52:34,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83649 to 83527. [2021-11-05 20:52:34,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83527 states, 83386 states have (on average 1.242270884800806) internal successors, (103588), 83526 states have internal predecessors, (103588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 20:52:34,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83527 states to 83527 states and 103588 transitions. [2021-11-05 20:52:34,435 INFO L78 Accepts]: Start accepts. Automaton has 83527 states and 103588 transitions. Word has length 44 [2021-11-05 20:52:34,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 20:52:34,435 INFO L470 AbstractCegarLoop]: Abstraction has 83527 states and 103588 transitions. [2021-11-05 20:52:34,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 20:52:34,435 INFO L276 IsEmpty]: Start isEmpty. Operand 83527 states and 103588 transitions. [2021-11-05 20:52:34,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-05 20:52:34,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 20:52:34,437 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, 1, 1, 1] [2021-11-05 20:52:34,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-05 20:52:34,437 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 138 more)] === [2021-11-05 20:52:34,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 20:52:34,438 INFO L85 PathProgramCache]: Analyzing trace with hash -66140840, now seen corresponding path program 1 times [2021-11-05 20:52:34,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 20:52:34,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468584035] [2021-11-05 20:52:34,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 20:52:34,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 20:52:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 20:52:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 20:52:34,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 20:52:34,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468584035] [2021-11-05 20:52:34,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468584035] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 20:52:34,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 20:52:34,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 20:52:34,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230288738] [2021-11-05 20:52:34,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 20:52:34,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 20:52:34,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 20:52:34,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 20:52:34,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 20:52:34,633 INFO L87 Difference]: Start difference. First operand 83527 states and 103588 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 20:52:36,671 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 20:52:39,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 20:52:39,366 INFO L93 Difference]: Finished difference Result 243589 states and 302089 transitions. [2021-11-05 20:52:39,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 20:52:39,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-05 20:52:39,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 20:52:39,673 INFO L225 Difference]: With dead ends: 243589 [2021-11-05 20:52:39,674 INFO L226 Difference]: Without dead ends: 160130 [2021-11-05 20:52:39,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.67ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 20:52:39,816 INFO L933 BasicCegarLoop]: 52014 mSDtfsCounter, 50516 mSDsluCounter, 51914 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2159.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 50516 SdHoareTripleChecker+Valid, 103928 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 246.93ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2303.70ms IncrementalHoareTripleChecker+Time [2021-11-05 20:52:39,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50516 Valid, 103928 Invalid, 68 Unknown, 0 Unchecked, 246.93ms Time], IncrementalHoareTripleChecker [9 Valid, 58 Invalid, 1 Unknown, 0 Unchecked, 2303.70ms Time] [2021-11-05 20:52:40,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160130 states. [2021-11-05 20:52:42,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160130 to 159251. [2021-11-05 20:52:43,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159251 states, 159110 states have (on average 1.242121802526554) internal successors, (197634), 159250 states have internal predecessors, (197634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 20:52:43,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159251 states to 159251 states and 197634 transitions. [2021-11-05 20:52:43,291 INFO L78 Accepts]: Start accepts. Automaton has 159251 states and 197634 transitions. Word has length 52 [2021-11-05 20:52:43,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 20:52:43,291 INFO L470 AbstractCegarLoop]: Abstraction has 159251 states and 197634 transitions. [2021-11-05 20:52:43,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 20:52:43,292 INFO L276 IsEmpty]: Start isEmpty. Operand 159251 states and 197634 transitions. [2021-11-05 20:52:43,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-05 20:52:43,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 20:52:43,293 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 20:52:43,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-05 20:52:43,293 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 138 more)] === [2021-11-05 20:52:43,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 20:52:43,293 INFO L85 PathProgramCache]: Analyzing trace with hash 2130093876, now seen corresponding path program 1 times [2021-11-05 20:52:43,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 20:52:43,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042938105] [2021-11-05 20:52:43,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 20:52:43,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 20:52:43,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 20:52:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 20:52:43,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 20:52:43,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042938105] [2021-11-05 20:52:43,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042938105] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 20:52:43,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 20:52:43,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 20:52:43,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886928088] [2021-11-05 20:52:43,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 20:52:43,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 20:52:43,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 20:52:43,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 20:52:43,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 20:52:43,417 INFO L87 Difference]: Start difference. First operand 159251 states and 197634 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 20:52:45,455 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []