./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--xen-netback--xen-netback.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4d014703 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-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--xen-netback--xen-netback.ko-entry_point.cil.out.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 f816b5cf025191130f4fa3c768ff88e2f73399115a7a3b9220171373d5eeca46 --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-4d01470 [2021-11-02 20:36:56,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 20:36:56,909 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 20:36:56,944 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 20:36:56,945 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 20:36:56,945 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 20:36:56,946 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 20:36:56,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 20:36:56,949 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 20:36:56,949 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 20:36:56,950 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 20:36:56,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 20:36:56,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 20:36:56,952 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 20:36:56,953 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 20:36:56,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 20:36:56,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 20:36:56,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 20:36:56,956 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 20:36:56,958 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 20:36:56,959 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 20:36:56,960 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 20:36:56,961 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 20:36:56,961 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 20:36:56,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 20:36:56,964 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 20:36:56,964 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 20:36:56,965 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 20:36:56,965 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 20:36:56,966 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 20:36:56,966 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 20:36:56,967 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 20:36:56,967 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 20:36:56,968 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 20:36:56,968 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 20:36:56,969 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 20:36:56,969 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 20:36:56,969 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 20:36:56,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 20:36:56,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 20:36:56,971 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 20:36:56,972 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-02 20:36:57,001 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 20:36:57,001 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 20:36:57,002 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 20:36:57,002 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 20:36:57,002 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 20:36:57,002 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 20:36:57,003 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 20:36:57,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 20:36:57,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 20:36:57,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 20:36:57,003 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 20:36:57,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 20:36:57,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 20:36:57,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 20:36:57,003 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 20:36:57,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 20:36:57,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 20:36:57,004 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 20:36:57,004 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 20:36:57,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 20:36:57,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 20:36:57,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 20:36:57,004 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 20:36:57,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 20:36:57,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 20:36:57,004 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 20:36:57,005 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 20:36:57,005 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 20:36:57,005 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 20:36:57,005 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f816b5cf025191130f4fa3c768ff88e2f73399115a7a3b9220171373d5eeca46 [2021-11-02 20:36:57,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 20:36:57,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 20:36:57,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 20:36:57,187 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 20:36:57,188 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 20:36:57,189 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--xen-netback--xen-netback.ko-entry_point.cil.out.i [2021-11-02 20:36:57,235 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43e8c8f4d/3f895aaa5f2a4dd49b6e8e61337a280d/FLAG457109cd9 [2021-11-02 20:36:57,892 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 20:36:57,893 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--xen-netback--xen-netback.ko-entry_point.cil.out.i [2021-11-02 20:36:57,947 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43e8c8f4d/3f895aaa5f2a4dd49b6e8e61337a280d/FLAG457109cd9 [2021-11-02 20:36:58,208 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43e8c8f4d/3f895aaa5f2a4dd49b6e8e61337a280d [2021-11-02 20:36:58,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 20:36:58,210 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 20:36:58,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 20:36:58,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 20:36:58,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 20:36:58,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:36:58" (1/1) ... [2021-11-02 20:36:58,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a89dbb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:58, skipping insertion in model container [2021-11-02 20:36:58,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:36:58" (1/1) ... [2021-11-02 20:36:58,231 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 20:36:58,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 20:37:00,511 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-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--xen-netback--xen-netback.ko-entry_point.cil.out.i[397231,397244] [2021-11-02 20:37:00,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 20:37:00,591 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 20:37:01,037 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-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--xen-netback--xen-netback.ko-entry_point.cil.out.i[397231,397244] [2021-11-02 20:37:01,045 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 20:37:01,153 INFO L208 MainTranslator]: Completed translation [2021-11-02 20:37:01,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:37:01 WrapperNode [2021-11-02 20:37:01,153 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 20:37:01,155 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 20:37:01,155 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 20:37:01,156 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 20:37:01,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:37:01" (1/1) ... [2021-11-02 20:37:01,247 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:37:01" (1/1) ... [2021-11-02 20:37:02,020 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 20:37:02,021 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 20:37:02,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 20:37:02,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 20:37:02,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:37:01" (1/1) ... [2021-11-02 20:37:02,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:37:01" (1/1) ... [2021-11-02 20:37:02,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:37:01" (1/1) ... [2021-11-02 20:37:02,352 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:37:01" (1/1) ... [2021-11-02 20:37:03,001 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:37:01" (1/1) ... [2021-11-02 20:37:03,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:37:01" (1/1) ... [2021-11-02 20:37:03,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:37:01" (1/1) ... [2021-11-02 20:37:03,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 20:37:03,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 20:37:03,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 20:37:03,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 20:37:03,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:37:01" (1/1) ... [2021-11-02 20:37:03,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 20:37:03,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 20:37:03,319 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) [2021-11-02 20:37:03,349 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 [2021-11-02 20:37:03,360 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-02 20:37:03,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 20:37:03,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-02 20:37:03,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-02 20:37:03,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 20:37:03,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 20:37:03,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 20:37:03,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 20:37:03,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 20:37:03,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-02 20:37:03,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-02 20:37:03,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 20:37:03,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 20:37:03,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-02 20:37:03,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 20:37:03,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 20:37:19,467 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 20:37:19,468 INFO L299 CfgBuilder]: Removed 8575 assume(true) statements. [2021-11-02 20:37:19,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:37:19 BoogieIcfgContainer [2021-11-02 20:37:19,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 20:37:19,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 20:37:19,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 20:37:19,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 20:37:19,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:36:58" (1/3) ... [2021-11-02 20:37:19,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6635821a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:37:19, skipping insertion in model container [2021-11-02 20:37:19,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:37:01" (2/3) ... [2021-11-02 20:37:19,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6635821a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:37:19, skipping insertion in model container [2021-11-02 20:37:19,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:37:19" (3/3) ... [2021-11-02 20:37:19,480 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--net--xen-netback--xen-netback.ko-entry_point.cil.out.i [2021-11-02 20:37:19,484 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 20:37:19,484 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2021-11-02 20:37:19,532 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 20:37:19,537 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 [2021-11-02 20:37:19,537 INFO L340 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2021-11-02 20:37:19,610 INFO L276 IsEmpty]: Start isEmpty. Operand has 8154 states, 8138 states have (on average 1.343450479233227) internal successors, (10933), 8153 states have internal predecessors, (10933), 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) [2021-11-02 20:37:19,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 20:37:19,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 20:37:19,616 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 20:37:19,616 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 12 more)] === [2021-11-02 20:37:19,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 20:37:19,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1393914949, now seen corresponding path program 1 times [2021-11-02 20:37:19,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 20:37:19,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470535141] [2021-11-02 20:37:19,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 20:37:19,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 20:37:19,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 20:37:20,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 20:37:20,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 20:37:20,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470535141] [2021-11-02 20:37:20,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470535141] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 20:37:20,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 20:37:20,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 20:37:20,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268665944] [2021-11-02 20:37:20,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 20:37:20,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 20:37:20,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 20:37:20,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 20:37:20,202 INFO L87 Difference]: Start difference. First operand has 8154 states, 8138 states have (on average 1.343450479233227) internal successors, (10933), 8153 states have internal predecessors, (10933), 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 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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) [2021-11-02 20:37:22,287 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 20:39:06,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 20:39:06,831 INFO L93 Difference]: Finished difference Result 24436 states and 32774 transitions. [2021-11-02 20:39:06,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 20:39:06,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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 17 [2021-11-02 20:39:06,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 20:39:06,893 INFO L225 Difference]: With dead ends: 24436 [2021-11-02 20:39:06,894 INFO L226 Difference]: Without dead ends: 16039 [2021-11-02 20:39:06,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.11ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 20:39:06,911 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 10496 mSDsluCounter, 10491 mSDsCounter, 0 mSdLazyCounter, 20845 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96759.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10496 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 20861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 241.93ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 20845 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 104244.85ms IncrementalHoareTripleChecker+Time [2021-11-02 20:39:06,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10496 Valid, 232 Invalid, 20861 Unknown, 0 Unchecked, 241.93ms Time], IncrementalHoareTripleChecker [15 Valid, 20845 Invalid, 1 Unknown, 0 Unchecked, 104244.85ms Time] [2021-11-02 20:39:06,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16039 states. [2021-11-02 20:39:07,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16039 to 16011. [2021-11-02 20:39:07,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16011 states, 15996 states have (on average 1.2846961740435108) internal successors, (20550), 16010 states have internal predecessors, (20550), 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) [2021-11-02 20:39:07,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16011 states to 16011 states and 20550 transitions. [2021-11-02 20:39:07,305 INFO L78 Accepts]: Start accepts. Automaton has 16011 states and 20550 transitions. Word has length 17 [2021-11-02 20:39:07,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 20:39:07,306 INFO L470 AbstractCegarLoop]: Abstraction has 16011 states and 20550 transitions. [2021-11-02 20:39:07,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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) [2021-11-02 20:39:07,307 INFO L276 IsEmpty]: Start isEmpty. Operand 16011 states and 20550 transitions. [2021-11-02 20:39:07,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-02 20:39:07,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 20:39:07,317 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 20:39:07,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 20:39:07,318 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 12 more)] === [2021-11-02 20:39:07,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 20:39:07,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1538739172, now seen corresponding path program 1 times [2021-11-02 20:39:07,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 20:39:07,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917684012] [2021-11-02 20:39:07,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 20:39:07,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 20:39:07,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 20:39:07,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 20:39:07,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 20:39:07,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917684012] [2021-11-02 20:39:07,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917684012] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 20:39:07,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 20:39:07,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 20:39:07,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892303622] [2021-11-02 20:39:07,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 20:39:07,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 20:39:07,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 20:39:07,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 20:39:07,551 INFO L87 Difference]: Start difference. First operand 16011 states and 20550 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2021-11-02 20:39:09,602 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 [] [2021-11-02 20:39:13,192 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 20:40:48,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 20:40:48,469 INFO L93 Difference]: Finished difference Result 32865 states and 42270 transitions. [2021-11-02 20:40:48,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 20:40:48,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 42 [2021-11-02 20:40:48,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 20:40:48,519 INFO L225 Difference]: With dead ends: 32865 [2021-11-02 20:40:48,519 INFO L226 Difference]: Without dead ends: 16857 [2021-11-02 20:40:48,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.81ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 20:40:48,548 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 591 mSDsluCounter, 10283 mSDsCounter, 0 mSdLazyCounter, 20625 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 92773.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 20627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 134.70ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20625 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 99594.31ms IncrementalHoareTripleChecker+Time [2021-11-02 20:40:48,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [591 Valid, 0 Invalid, 20627 Unknown, 0 Unchecked, 134.70ms Time], IncrementalHoareTripleChecker [1 Valid, 20625 Invalid, 1 Unknown, 0 Unchecked, 99594.31ms Time] [2021-11-02 20:40:48,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16857 states. [2021-11-02 20:40:48,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16857 to 16817. [2021-11-02 20:40:48,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16817 states, 16802 states have (on average 1.2902035471967623) internal successors, (21678), 16816 states have internal predecessors, (21678), 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) [2021-11-02 20:40:48,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16817 states to 16817 states and 21678 transitions. [2021-11-02 20:40:48,831 INFO L78 Accepts]: Start accepts. Automaton has 16817 states and 21678 transitions. Word has length 42 [2021-11-02 20:40:48,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 20:40:48,832 INFO L470 AbstractCegarLoop]: Abstraction has 16817 states and 21678 transitions. [2021-11-02 20:40:48,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2021-11-02 20:40:48,835 INFO L276 IsEmpty]: Start isEmpty. Operand 16817 states and 21678 transitions. [2021-11-02 20:40:48,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-02 20:40:48,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 20:40:48,840 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 20:40:48,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 20:40:48,841 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 12 more)] === [2021-11-02 20:40:48,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 20:40:48,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1876995584, now seen corresponding path program 1 times [2021-11-02 20:40:48,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 20:40:48,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513605715] [2021-11-02 20:40:48,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 20:40:48,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 20:40:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 20:40:49,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 20:40:49,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 20:40:49,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513605715] [2021-11-02 20:40:49,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513605715] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 20:40:49,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 20:40:49,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 20:40:49,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403780538] [2021-11-02 20:40:49,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 20:40:49,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 20:40:49,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 20:40:49,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 20:40:49,129 INFO L87 Difference]: Start difference. First operand 16817 states and 21678 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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) [2021-11-02 20:40:51,183 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 [] [2021-11-02 20:40:58,057 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 20:41:00,078 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 20:41:01,277 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 20:43:20,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 20:43:20,822 INFO L93 Difference]: Finished difference Result 33646 states and 43373 transitions. [2021-11-02 20:43:20,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 20:43:20,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 72 [2021-11-02 20:43:20,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 20:43:20,855 INFO L225 Difference]: With dead ends: 33646 [2021-11-02 20:43:20,856 INFO L226 Difference]: Without dead ends: 16826 [2021-11-02 20:43:20,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 96.57ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 20:43:20,881 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 20600 mSDsCounter, 0 mSdLazyCounter, 30913 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 140846.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 30916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 220.96ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30913 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 150316.29ms IncrementalHoareTripleChecker+Time [2021-11-02 20:43:20,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 30916 Unknown, 0 Unchecked, 220.96ms Time], IncrementalHoareTripleChecker [1 Valid, 30913 Invalid, 2 Unknown, 0 Unchecked, 150316.29ms Time] [2021-11-02 20:43:20,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16826 states. [2021-11-02 20:43:21,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16826 to 16820. [2021-11-02 20:43:21,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16820 states, 16805 states have (on average 1.2900327283546564) internal successors, (21679), 16819 states have internal predecessors, (21679), 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) [2021-11-02 20:43:21,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16820 states to 16820 states and 21679 transitions. [2021-11-02 20:43:21,135 INFO L78 Accepts]: Start accepts. Automaton has 16820 states and 21679 transitions. Word has length 72 [2021-11-02 20:43:21,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 20:43:21,135 INFO L470 AbstractCegarLoop]: Abstraction has 16820 states and 21679 transitions. [2021-11-02 20:43:21,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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) [2021-11-02 20:43:21,136 INFO L276 IsEmpty]: Start isEmpty. Operand 16820 states and 21679 transitions. [2021-11-02 20:43:21,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-02 20:43:21,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 20:43:21,140 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 20:43:21,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 20:43:21,140 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 12 more)] === [2021-11-02 20:43:21,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 20:43:21,141 INFO L85 PathProgramCache]: Analyzing trace with hash 866752574, now seen corresponding path program 1 times [2021-11-02 20:43:21,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 20:43:21,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480130283] [2021-11-02 20:43:21,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 20:43:21,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 20:43:21,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 20:43:21,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 20:43:21,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 20:43:21,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480130283] [2021-11-02 20:43:21,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480130283] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 20:43:21,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 20:43:21,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 20:43:21,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999433364] [2021-11-02 20:43:21,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 20:43:21,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 20:43:21,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 20:43:21,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 20:43:21,440 INFO L87 Difference]: Start difference. First operand 16820 states and 21679 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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) [2021-11-02 20:43:23,498 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 [] [2021-11-02 20:43:33,358 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 20:46:53,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 20:46:53,237 INFO L93 Difference]: Finished difference Result 33660 states and 43382 transitions. [2021-11-02 20:46:53,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 20:46:53,238 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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 81 [2021-11-02 20:46:53,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 20:46:53,269 INFO L225 Difference]: With dead ends: 33660 [2021-11-02 20:46:53,269 INFO L226 Difference]: Without dead ends: 16833 [2021-11-02 20:46:53,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 203.25ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 20:46:53,300 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 20 mSDsluCounter, 30899 mSDsCounter, 0 mSdLazyCounter, 41220 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 196304.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 41227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 304.37ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41220 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 210045.21ms IncrementalHoareTripleChecker+Time [2021-11-02 20:46:53,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 0 Invalid, 41227 Unknown, 0 Unchecked, 304.37ms Time], IncrementalHoareTripleChecker [5 Valid, 41220 Invalid, 2 Unknown, 0 Unchecked, 210045.21ms Time] [2021-11-02 20:46:53,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16833 states. [2021-11-02 20:46:53,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16833 to 16755. [2021-11-02 20:46:53,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16755 states, 16740 states have (on average 1.2900836320191158) internal successors, (21596), 16754 states have internal predecessors, (21596), 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) [2021-11-02 20:46:53,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16755 states to 16755 states and 21596 transitions. [2021-11-02 20:46:53,565 INFO L78 Accepts]: Start accepts. Automaton has 16755 states and 21596 transitions. Word has length 81 [2021-11-02 20:46:53,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 20:46:53,567 INFO L470 AbstractCegarLoop]: Abstraction has 16755 states and 21596 transitions. [2021-11-02 20:46:53,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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) [2021-11-02 20:46:53,567 INFO L276 IsEmpty]: Start isEmpty. Operand 16755 states and 21596 transitions. [2021-11-02 20:46:53,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-02 20:46:53,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 20:46:53,572 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 20:46:53,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 20:46:53,573 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 12 more)] === [2021-11-02 20:46:53,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 20:46:53,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1542568662, now seen corresponding path program 1 times [2021-11-02 20:46:53,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 20:46:53,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914270239] [2021-11-02 20:46:53,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 20:46:53,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 20:46:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 20:46:53,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 20:46:53,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 20:46:53,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914270239] [2021-11-02 20:46:53,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914270239] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 20:46:53,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 20:46:53,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 20:46:53,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022704957] [2021-11-02 20:46:53,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 20:46:53,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 20:46:53,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 20:46:53,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 20:46:53,860 INFO L87 Difference]: Start difference. First operand 16755 states and 21596 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2021-11-02 20:46:55,925 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 [] [2021-11-02 20:47:02,735 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 20:48:51,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 20:48:51,274 INFO L93 Difference]: Finished difference Result 33525 states and 43225 transitions. [2021-11-02 20:48:51,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 20:48:51,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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 89 [2021-11-02 20:48:51,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 20:48:51,299 INFO L225 Difference]: With dead ends: 33525 [2021-11-02 20:48:51,299 INFO L226 Difference]: Without dead ends: 16773 [2021-11-02 20:48:51,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.22ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 20:48:51,320 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 10275 mSDsCounter, 0 mSdLazyCounter, 20604 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 106132.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 20614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 142.12ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 20604 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 116286.79ms IncrementalHoareTripleChecker+Time [2021-11-02 20:48:51,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 20614 Unknown, 0 Unchecked, 142.12ms Time], IncrementalHoareTripleChecker [8 Valid, 20604 Invalid, 2 Unknown, 0 Unchecked, 116286.79ms Time] [2021-11-02 20:48:51,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16773 states. [2021-11-02 20:48:51,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16773 to 16773. [2021-11-02 20:48:51,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16773 states, 16758 states have (on average 1.2897720491705453) internal successors, (21614), 16772 states have internal predecessors, (21614), 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) [2021-11-02 20:48:51,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16773 states to 16773 states and 21614 transitions. [2021-11-02 20:48:51,540 INFO L78 Accepts]: Start accepts. Automaton has 16773 states and 21614 transitions. Word has length 89 [2021-11-02 20:48:51,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 20:48:51,541 INFO L470 AbstractCegarLoop]: Abstraction has 16773 states and 21614 transitions. [2021-11-02 20:48:51,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2021-11-02 20:48:51,541 INFO L276 IsEmpty]: Start isEmpty. Operand 16773 states and 21614 transitions. [2021-11-02 20:48:51,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-02 20:48:51,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 20:48:51,546 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 20:48:51,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 20:48:51,546 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 12 more)] === [2021-11-02 20:48:51,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 20:48:51,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1043650204, now seen corresponding path program 1 times [2021-11-02 20:48:51,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 20:48:51,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880923895] [2021-11-02 20:48:51,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 20:48:51,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 20:48:51,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 20:48:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 20:48:51,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 20:48:51,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880923895] [2021-11-02 20:48:51,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880923895] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 20:48:51,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 20:48:51,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 20:48:51,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986487948] [2021-11-02 20:48:51,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 20:48:51,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 20:48:51,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 20:48:51,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 20:48:51,889 INFO L87 Difference]: Start difference. First operand 16773 states and 21614 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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) [2021-11-02 20:48:54,516 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.63s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 20:50:31,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 20:50:31,206 INFO L93 Difference]: Finished difference Result 34453 states and 44480 transitions. [2021-11-02 20:50:31,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 20:50:31,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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 90 [2021-11-02 20:50:31,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 20:50:31,238 INFO L225 Difference]: With dead ends: 34453 [2021-11-02 20:50:31,238 INFO L226 Difference]: Without dead ends: 17683 [2021-11-02 20:50:31,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 118.13ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 20:50:31,261 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 16394 mSDsluCounter, 5366 mSDsCounter, 0 mSdLazyCounter, 15718 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 86887.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16394 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 15749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 197.04ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 15718 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 97787.20ms IncrementalHoareTripleChecker+Time [2021-11-02 20:50:31,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16394 Valid, 0 Invalid, 15749 Unknown, 0 Unchecked, 197.04ms Time], IncrementalHoareTripleChecker [30 Valid, 15718 Invalid, 1 Unknown, 0 Unchecked, 97787.20ms Time] [2021-11-02 20:50:31,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17683 states. [2021-11-02 20:50:31,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17683 to 17573. [2021-11-02 20:50:31,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17573 states, 17558 states have (on average 1.2949652580020503) internal successors, (22737), 17572 states have internal predecessors, (22737), 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) [2021-11-02 20:50:31,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17573 states to 17573 states and 22737 transitions. [2021-11-02 20:50:31,589 INFO L78 Accepts]: Start accepts. Automaton has 17573 states and 22737 transitions. Word has length 90 [2021-11-02 20:50:31,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 20:50:31,590 INFO L470 AbstractCegarLoop]: Abstraction has 17573 states and 22737 transitions. [2021-11-02 20:50:31,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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) [2021-11-02 20:50:31,590 INFO L276 IsEmpty]: Start isEmpty. Operand 17573 states and 22737 transitions. [2021-11-02 20:50:31,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-02 20:50:31,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 20:50:31,595 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 20:50:31,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 20:50:31,595 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 12 more)] === [2021-11-02 20:50:31,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 20:50:31,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1418104566, now seen corresponding path program 1 times [2021-11-02 20:50:31,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 20:50:31,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421866758] [2021-11-02 20:50:31,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 20:50:31,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 20:50:31,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 20:50:32,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 20:50:32,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 20:50:32,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421866758] [2021-11-02 20:50:32,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421866758] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 20:50:32,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548344162] [2021-11-02 20:50:32,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 20:50:32,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 20:50:32,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 20:50:32,260 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 20:50:32,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 20:50:33,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 20:50:33,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 3821 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 20:50:33,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 20:50:34,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 20:50:34,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 20:50:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 20:50:34,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548344162] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 20:50:34,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 20:50:34,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-02 20:50:34,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716335238] [2021-11-02 20:50:34,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 20:50:34,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 20:50:34,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 20:50:34,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-11-02 20:50:34,627 INFO L87 Difference]: Start difference. First operand 17573 states and 22737 transitions. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 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) [2021-11-02 20:50:36,685 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 20:50:50,666 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 20:50:52,685 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 20:50:54,002 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 20:50:55,116 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] Killed by 15