./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 5b36d44f 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-5b36d44 [2021-11-07 17:31:13,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 17:31:13,827 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 17:31:13,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 17:31:13,867 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 17:31:13,870 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 17:31:13,872 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 17:31:13,875 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 17:31:13,877 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 17:31:13,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 17:31:13,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 17:31:13,881 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 17:31:13,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 17:31:13,883 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 17:31:13,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 17:31:13,890 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 17:31:13,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 17:31:13,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 17:31:13,897 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 17:31:13,899 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 17:31:13,902 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 17:31:13,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 17:31:13,903 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 17:31:13,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 17:31:13,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 17:31:13,910 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 17:31:13,910 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 17:31:13,911 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 17:31:13,912 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 17:31:13,913 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 17:31:13,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 17:31:13,914 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 17:31:13,915 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 17:31:13,916 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 17:31:13,918 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 17:31:13,918 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 17:31:13,919 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 17:31:13,919 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 17:31:13,919 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 17:31:13,920 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 17:31:13,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 17:31:13,921 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-07 17:31:13,953 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 17:31:13,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 17:31:13,953 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 17:31:13,954 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 17:31:13,955 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 17:31:13,955 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 17:31:13,955 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 17:31:13,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 17:31:13,956 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 17:31:13,956 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 17:31:13,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 17:31:13,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 17:31:13,957 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 17:31:13,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 17:31:13,957 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 17:31:13,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 17:31:13,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 17:31:13,958 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 17:31:13,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 17:31:13,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 17:31:13,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 17:31:13,959 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 17:31:13,959 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 17:31:13,959 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 17:31:13,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 17:31:13,959 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 17:31:13,959 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 17:31:13,960 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 17:31:13,960 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 17:31:13,960 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5663310b82fa3e5d48c5bcacd13ac8ac886029c41a2f8f3bd2b8442c496a9447 [2021-11-07 17:31:14,163 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 17:31:14,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 17:31:14,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 17:31:14,191 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 17:31:14,192 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 17:31:14,193 INFO L432 ainManager$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 [2021-11-07 17:31:14,254 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31e5e2f04/64da8f2a5fbf46a7ae96ac4da07b2358/FLAG42e236872 [2021-11-07 17:31:14,987 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 17:31:14,988 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 [2021-11-07 17:31:15,051 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31e5e2f04/64da8f2a5fbf46a7ae96ac4da07b2358/FLAG42e236872 [2021-11-07 17:31:15,530 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31e5e2f04/64da8f2a5fbf46a7ae96ac4da07b2358 [2021-11-07 17:31:15,533 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 17:31:15,535 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 17:31:15,537 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 17:31:15,537 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 17:31:15,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 17:31:15,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:31:15" (1/1) ... [2021-11-07 17:31:15,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3549250b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:31:15, skipping insertion in model container [2021-11-07 17:31:15,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:31:15" (1/1) ... [2021-11-07 17:31:15,553 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 17:31:15,680 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 17:31:18,742 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] [2021-11-07 17:31:18,745 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] [2021-11-07 17:31:18,745 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] [2021-11-07 17:31:18,746 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] [2021-11-07 17:31:18,777 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 17:31:18,838 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 17:31:19,194 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] [2021-11-07 17:31:19,195 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] [2021-11-07 17:31:19,196 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] [2021-11-07 17:31:19,197 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] [2021-11-07 17:31:19,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 17:31:19,402 INFO L208 MainTranslator]: Completed translation [2021-11-07 17:31:19,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:31:19 WrapperNode [2021-11-07 17:31:19,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 17:31:19,403 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 17:31:19,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 17:31:19,404 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 17:31:19,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:31:19" (1/1) ... [2021-11-07 17:31:19,501 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:31:19" (1/1) ... [2021-11-07 17:31:29,480 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 17:31:29,481 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 17:31:29,482 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 17:31:29,482 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 17:31:29,488 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:31:19" (1/1) ... [2021-11-07 17:31:29,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:31:19" (1/1) ... [2021-11-07 17:31:30,627 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:31:19" (1/1) ... [2021-11-07 17:31:30,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:31:19" (1/1) ... [2021-11-07 17:31:33,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:31:19" (1/1) ... [2021-11-07 17:31:33,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:31:19" (1/1) ... [2021-11-07 17:31:34,425 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:31:19" (1/1) ... [2021-11-07 17:31:35,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 17:31:35,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 17:31:35,605 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 17:31:35,605 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 17:31:35,606 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:31:19" (1/1) ... [2021-11-07 17:31:35,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 17:31:35,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 17:31:35,641 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) [2021-11-07 17:31:35,659 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 [2021-11-07 17:31:35,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 17:31:35,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-07 17:31:35,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-07 17:31:35,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 17:31:35,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 17:31:35,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 17:31:35,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 17:31:35,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 17:31:35,676 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 17:31:35,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 17:31:35,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 17:31:35,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 17:31:35,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 17:31:35,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 17:31:35,677 INFO L130 BoogieDeclarations]: Found specification of procedure delayed_work_timer_fn [2021-11-07 17:31:35,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 17:33:39,350 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_0_switch_break#2: ldv_switch_0_#res := 0; [2021-11-07 17:33:39,351 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_0_switch_break: ldv_switch_0_#res := 0; [2021-11-07 17:33:39,352 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_1_switch_break#2: ldv_switch_1_#res := 0; [2021-11-07 17:33:39,352 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_1_switch_break#3: ldv_switch_1_#res := 0; [2021-11-07 17:33:39,352 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_1_switch_break: ldv_switch_1_#res := 0; [2021-11-07 17:33:39,353 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-07 17:33:39,502 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 17:33:39,502 INFO L299 CfgBuilder]: Removed 57606 assume(true) statements. [2021-11-07 17:33:39,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:33:39 BoogieIcfgContainer [2021-11-07 17:33:39,537 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 17:33:39,538 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 17:33:39,539 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 17:33:39,544 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 17:33:39,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 05:31:15" (1/3) ... [2021-11-07 17:33:39,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a05c462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:33:39, skipping insertion in model container [2021-11-07 17:33:39,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:31:19" (2/3) ... [2021-11-07 17:33:39,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a05c462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:33:39, skipping insertion in model container [2021-11-07 17:33:39,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:33:39" (3/3) ... [2021-11-07 17:33:39,546 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-qlogic-qla3xxx.cil.i [2021-11-07 17:33:39,550 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 17:33:39,550 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 141 error locations. [2021-11-07 17:33:39,682 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 17:33:39,687 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 [2021-11-07 17:33:39,687 INFO L340 AbstractCegarLoop]: Starting to check reachability of 141 error locations. [2021-11-07 17:33:40,095 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) [2021-11-07 17:33:40,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 17:33:40,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 17:33:40,104 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] [2021-11-07 17:33:40,104 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)] === [2021-11-07 17:33:40,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 17:33:40,108 INFO L85 PathProgramCache]: Analyzing trace with hash 103332009, now seen corresponding path program 1 times [2021-11-07 17:33:40,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 17:33:40,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638615963] [2021-11-07 17:33:40,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 17:33:40,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 17:33:40,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 17:33:40,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 17:33:40,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 17:33:40,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638615963] [2021-11-07 17:33:40,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638615963] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 17:33:40,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 17:33:40,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 17:33:40,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951127949] [2021-11-07 17:33:40,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 17:33:40,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 17:33:40,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 17:33:40,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 17:33:40,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 17:33:40,826 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) [2021-11-07 17:33:42,895 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 17:33:45,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 17:33:45,794 INFO L93 Difference]: Finished difference Result 126554 states and 158197 transitions. [2021-11-07 17:33:45,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 17:33:45,805 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 [2021-11-07 17:33:45,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 17:33:46,137 INFO L225 Difference]: With dead ends: 126554 [2021-11-07 17:33:46,138 INFO L226 Difference]: Without dead ends: 83797 [2021-11-07 17:33:46,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.33ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 17:33:46,249 INFO L933 BasicCegarLoop]: 52599 mSDtfsCounter, 52360 mSDsluCounter, 52559 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2080.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52360 SdHoareTripleChecker+Valid, 105158 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 206.33ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2241.60ms IncrementalHoareTripleChecker+Time [2021-11-07 17:33:46,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52360 Valid, 105158 Invalid, 14 Unknown, 0 Unchecked, 206.33ms Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 1 Unknown, 0 Unchecked, 2241.60ms Time] [2021-11-07 17:33:46,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83797 states. [2021-11-07 17:33:48,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83797 to 83567. [2021-11-07 17:33:48,648 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) [2021-11-07 17:33:48,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83567 states to 83567 states and 103717 transitions. [2021-11-07 17:33:48,908 INFO L78 Accepts]: Start accepts. Automaton has 83567 states and 103717 transitions. Word has length 39 [2021-11-07 17:33:48,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 17:33:48,908 INFO L470 AbstractCegarLoop]: Abstraction has 83567 states and 103717 transitions. [2021-11-07 17:33:48,908 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) [2021-11-07 17:33:48,908 INFO L276 IsEmpty]: Start isEmpty. Operand 83567 states and 103717 transitions. [2021-11-07 17:33:48,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 17:33:48,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 17:33:48,910 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] [2021-11-07 17:33:48,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 17:33:48,911 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)] === [2021-11-07 17:33:48,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 17:33:48,912 INFO L85 PathProgramCache]: Analyzing trace with hash -2012062014, now seen corresponding path program 1 times [2021-11-07 17:33:48,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 17:33:48,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142015689] [2021-11-07 17:33:48,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 17:33:48,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 17:33:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 17:33:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 17:33:49,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 17:33:49,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142015689] [2021-11-07 17:33:49,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142015689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 17:33:49,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 17:33:49,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 17:33:49,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145489455] [2021-11-07 17:33:49,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 17:33:49,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 17:33:49,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 17:33:49,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 17:33:49,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 17:33:49,173 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) [2021-11-07 17:33:51,232 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 17:33:54,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 17:33:54,486 INFO L93 Difference]: Finished difference Result 243877 states and 302463 transitions. [2021-11-07 17:33:54,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 17:33:54,487 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 [2021-11-07 17:33:54,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 17:33:55,009 INFO L225 Difference]: With dead ends: 243877 [2021-11-07 17:33:55,010 INFO L226 Difference]: Without dead ends: 160378 [2021-11-07 17:33:55,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.62ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 17:33:55,178 INFO L933 BasicCegarLoop]: 51998 mSDtfsCounter, 51768 mSDsluCounter, 47843 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2287.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 51768 SdHoareTripleChecker+Valid, 99841 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 93.89ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2488.85ms IncrementalHoareTripleChecker+Time [2021-11-07 17:33:55,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51768 Valid, 99841 Invalid, 93 Unknown, 0 Unchecked, 93.89ms Time], IncrementalHoareTripleChecker [32 Valid, 60 Invalid, 1 Unknown, 0 Unchecked, 2488.85ms Time] [2021-11-07 17:33:55,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160378 states. [2021-11-07 17:33:58,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160378 to 159286. [2021-11-07 17:33:58,553 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) [2021-11-07 17:33:58,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159286 states to 159286 states and 197689 transitions. [2021-11-07 17:33:58,911 INFO L78 Accepts]: Start accepts. Automaton has 159286 states and 197689 transitions. Word has length 40 [2021-11-07 17:33:58,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 17:33:58,912 INFO L470 AbstractCegarLoop]: Abstraction has 159286 states and 197689 transitions. [2021-11-07 17:33:58,912 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) [2021-11-07 17:33:58,912 INFO L276 IsEmpty]: Start isEmpty. Operand 159286 states and 197689 transitions. [2021-11-07 17:33:58,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 17:33:58,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 17:33:58,915 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] [2021-11-07 17:33:58,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 17:33:58,915 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)] === [2021-11-07 17:33:58,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 17:33:58,916 INFO L85 PathProgramCache]: Analyzing trace with hash -2065747957, now seen corresponding path program 1 times [2021-11-07 17:33:58,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 17:33:58,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136734872] [2021-11-07 17:33:58,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 17:33:58,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 17:33:58,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 17:33:59,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 17:33:59,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 17:33:59,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136734872] [2021-11-07 17:33:59,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136734872] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 17:33:59,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 17:33:59,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 17:33:59,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617564841] [2021-11-07 17:33:59,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 17:33:59,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 17:33:59,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 17:33:59,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 17:33:59,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 17:33:59,091 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) [2021-11-07 17:34:01,153 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 17:34:03,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 17:34:03,849 INFO L93 Difference]: Finished difference Result 242867 states and 301344 transitions. [2021-11-07 17:34:03,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 17:34:03,849 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 [2021-11-07 17:34:03,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 17:34:04,043 INFO L225 Difference]: With dead ends: 242867 [2021-11-07 17:34:04,043 INFO L226 Difference]: Without dead ends: 83649 [2021-11-07 17:34:04,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.27ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 17:34:04,290 INFO L933 BasicCegarLoop]: 52152 mSDtfsCounter, 1752 mSDsluCounter, 51914 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2212.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1752 SdHoareTripleChecker+Valid, 104066 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 49.21ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2439.22ms IncrementalHoareTripleChecker+Time [2021-11-07 17:34:04,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1752 Valid, 104066 Invalid, 94 Unknown, 0 Unchecked, 49.21ms Time], IncrementalHoareTripleChecker [19 Valid, 74 Invalid, 1 Unknown, 0 Unchecked, 2439.22ms Time] [2021-11-07 17:34:04,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83649 states. [2021-11-07 17:34:05,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83649 to 83527. [2021-11-07 17:34:05,918 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) [2021-11-07 17:34:06,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83527 states to 83527 states and 103588 transitions. [2021-11-07 17:34:06,091 INFO L78 Accepts]: Start accepts. Automaton has 83527 states and 103588 transitions. Word has length 44 [2021-11-07 17:34:06,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 17:34:06,092 INFO L470 AbstractCegarLoop]: Abstraction has 83527 states and 103588 transitions. [2021-11-07 17:34:06,092 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) [2021-11-07 17:34:06,092 INFO L276 IsEmpty]: Start isEmpty. Operand 83527 states and 103588 transitions. [2021-11-07 17:34:06,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 17:34:06,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 17:34:06,094 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] [2021-11-07 17:34:06,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 17:34:06,095 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)] === [2021-11-07 17:34:06,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 17:34:06,096 INFO L85 PathProgramCache]: Analyzing trace with hash -66140840, now seen corresponding path program 1 times [2021-11-07 17:34:06,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 17:34:06,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236812302] [2021-11-07 17:34:06,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 17:34:06,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 17:34:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 17:34:06,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 17:34:06,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 17:34:06,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236812302] [2021-11-07 17:34:06,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236812302] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 17:34:06,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 17:34:06,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 17:34:06,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297649813] [2021-11-07 17:34:06,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 17:34:06,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 17:34:06,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 17:34:06,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 17:34:06,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 17:34:06,310 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) [2021-11-07 17:34:08,359 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 17:34:11,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 17:34:11,244 INFO L93 Difference]: Finished difference Result 243589 states and 302089 transitions. [2021-11-07 17:34:11,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 17:34:11,245 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 [2021-11-07 17:34:11,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 17:34:11,580 INFO L225 Difference]: With dead ends: 243589 [2021-11-07 17:34:11,581 INFO L226 Difference]: Without dead ends: 160130 [2021-11-07 17:34:11,728 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 [2021-11-07 17:34:11,729 INFO L933 BasicCegarLoop]: 52014 mSDtfsCounter, 50516 mSDsluCounter, 51914 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2165.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 50516 SdHoareTripleChecker+Valid, 103928 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 77.15ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2336.81ms IncrementalHoareTripleChecker+Time [2021-11-07 17:34:11,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50516 Valid, 103928 Invalid, 68 Unknown, 0 Unchecked, 77.15ms Time], IncrementalHoareTripleChecker [9 Valid, 58 Invalid, 1 Unknown, 0 Unchecked, 2336.81ms Time] [2021-11-07 17:34:11,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160130 states. [2021-11-07 17:34:14,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160130 to 159251. [2021-11-07 17:34:14,952 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) [2021-11-07 17:34:15,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159251 states to 159251 states and 197634 transitions. [2021-11-07 17:34:15,641 INFO L78 Accepts]: Start accepts. Automaton has 159251 states and 197634 transitions. Word has length 52 [2021-11-07 17:34:15,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 17:34:15,642 INFO L470 AbstractCegarLoop]: Abstraction has 159251 states and 197634 transitions. [2021-11-07 17:34:15,642 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) [2021-11-07 17:34:15,643 INFO L276 IsEmpty]: Start isEmpty. Operand 159251 states and 197634 transitions. [2021-11-07 17:34:15,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 17:34:15,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 17:34:15,645 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] [2021-11-07 17:34:15,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 17:34:15,645 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)] === [2021-11-07 17:34:15,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 17:34:15,646 INFO L85 PathProgramCache]: Analyzing trace with hash 2130093876, now seen corresponding path program 1 times [2021-11-07 17:34:15,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 17:34:15,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590016075] [2021-11-07 17:34:15,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 17:34:15,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 17:34:15,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 17:34:15,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 17:34:15,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 17:34:15,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590016075] [2021-11-07 17:34:15,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590016075] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 17:34:15,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 17:34:15,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 17:34:15,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770293204] [2021-11-07 17:34:15,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 17:34:15,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 17:34:15,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 17:34:15,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 17:34:15,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 17:34:15,821 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) [2021-11-07 17:34:17,873 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []