./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 173e3943 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-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.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 d88455bf5089be24833f69dfcbd91003e7e136bcd5efcd63ae18e59d7f59e87d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 14:44:00,416 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 14:44:00,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 14:44:00,455 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 14:44:00,455 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 14:44:00,458 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 14:44:00,460 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 14:44:00,462 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 14:44:00,464 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 14:44:00,468 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 14:44:00,469 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 14:44:00,470 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 14:44:00,470 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 14:44:00,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 14:44:00,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 14:44:00,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 14:44:00,477 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 14:44:00,478 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 14:44:00,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 14:44:00,485 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 14:44:00,486 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 14:44:00,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 14:44:00,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 14:44:00,489 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 14:44:00,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 14:44:00,494 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 14:44:00,495 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 14:44:00,496 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 14:44:00,496 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 14:44:00,497 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 14:44:00,497 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 14:44:00,498 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 14:44:00,500 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 14:44:00,500 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 14:44:00,501 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 14:44:00,502 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 14:44:00,502 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 14:44:00,502 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 14:44:00,503 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 14:44:00,503 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 14:44:00,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 14:44:00,508 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 14:44:00,540 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 14:44:00,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 14:44:00,541 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 14:44:00,541 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 14:44:00,542 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 14:44:00,542 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 14:44:00,542 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 14:44:00,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 14:44:00,543 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 14:44:00,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 14:44:00,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 14:44:00,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 14:44:00,544 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 14:44:00,544 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 14:44:00,544 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 14:44:00,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 14:44:00,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 14:44:00,545 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 14:44:00,545 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 14:44:00,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:44:00,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 14:44:00,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 14:44:00,546 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 14:44:00,546 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 14:44:00,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 14:44:00,546 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 14:44:00,546 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 14:44:00,547 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 14:44:00,547 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 14:44:00,547 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d88455bf5089be24833f69dfcbd91003e7e136bcd5efcd63ae18e59d7f59e87d [2021-11-06 14:44:00,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 14:44:00,816 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 14:44:00,819 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 14:44:00,820 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 14:44:00,823 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 14:44:00,824 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i [2021-11-06 14:44:00,882 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba2fae920/292917cdb7cb4ffb96d6b834770d0ae6/FLAG5288b8c08 [2021-11-06 14:44:01,550 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 14:44:01,551 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i [2021-11-06 14:44:01,593 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba2fae920/292917cdb7cb4ffb96d6b834770d0ae6/FLAG5288b8c08 [2021-11-06 14:44:01,656 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba2fae920/292917cdb7cb4ffb96d6b834770d0ae6 [2021-11-06 14:44:01,658 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 14:44:01,659 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 14:44:01,660 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 14:44:01,661 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 14:44:01,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 14:44:01,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:44:01" (1/1) ... [2021-11-06 14:44:01,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19476de5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:44:01, skipping insertion in model container [2021-11-06 14:44:01,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:44:01" (1/1) ... [2021-11-06 14:44:01,671 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 14:44:01,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 14:44:02,589 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-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i[205251,205264] [2021-11-06 14:44:03,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:44:03,472 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 14:44:03,628 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-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i[205251,205264] [2021-11-06 14:44:03,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:44:03,864 INFO L208 MainTranslator]: Completed translation [2021-11-06 14:44:03,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:44:03 WrapperNode [2021-11-06 14:44:03,865 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 14:44:03,867 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 14:44:03,867 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 14:44:03,868 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 14:44:03,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:44:03" (1/1) ... [2021-11-06 14:44:03,971 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:44:03" (1/1) ... [2021-11-06 14:44:04,439 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 14:44:04,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 14:44:04,440 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 14:44:04,440 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 14:44:04,447 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:44:03" (1/1) ... [2021-11-06 14:44:04,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:44:03" (1/1) ... [2021-11-06 14:44:04,599 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:44:03" (1/1) ... [2021-11-06 14:44:04,600 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:44:03" (1/1) ... [2021-11-06 14:44:05,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:44:03" (1/1) ... [2021-11-06 14:44:05,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:44:03" (1/1) ... [2021-11-06 14:44:05,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:44:03" (1/1) ... [2021-11-06 14:44:05,236 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 14:44:05,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 14:44:05,238 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 14:44:05,238 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 14:44:05,239 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:44:03" (1/1) ... [2021-11-06 14:44:05,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:44:05,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:44:05,269 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) [2021-11-06 14:44:05,290 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 [2021-11-06 14:44:05,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-06 14:44:05,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-06 14:44:05,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 14:44:05,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 14:44:05,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u32 [2021-11-06 14:44:05,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 14:44:05,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 14:44:05,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-06 14:44:05,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 14:44:05,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 14:44:05,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 14:44:05,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 14:44:05,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 14:44:05,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 14:44:05,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 14:44:05,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 14:44:37,948 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 14:44:37,949 INFO L299 CfgBuilder]: Removed 2280 assume(true) statements. [2021-11-06 14:44:37,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:44:37 BoogieIcfgContainer [2021-11-06 14:44:37,952 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 14:44:37,954 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 14:44:37,954 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 14:44:37,956 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 14:44:37,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 02:44:01" (1/3) ... [2021-11-06 14:44:37,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22306cde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:44:37, skipping insertion in model container [2021-11-06 14:44:37,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:44:03" (2/3) ... [2021-11-06 14:44:37,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22306cde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:44:37, skipping insertion in model container [2021-11-06 14:44:37,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:44:37" (3/3) ... [2021-11-06 14:44:37,959 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i [2021-11-06 14:44:37,963 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 14:44:37,963 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-06 14:44:38,012 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 14:44:38,016 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 [2021-11-06 14:44:38,017 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-06 14:44:38,062 INFO L276 IsEmpty]: Start isEmpty. Operand has 2753 states, 2751 states have (on average 1.490367139222101) internal successors, (4100), 2752 states have internal predecessors, (4100), 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) [2021-11-06 14:44:38,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-06 14:44:38,070 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:44:38,071 INFO L513 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] [2021-11-06 14:44:38,071 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:44:38,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:44:38,075 INFO L85 PathProgramCache]: Analyzing trace with hash -883522735, now seen corresponding path program 1 times [2021-11-06 14:44:38,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:44:38,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660993205] [2021-11-06 14:44:38,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:44:38,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:44:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:44:38,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:44:38,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:44:38,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660993205] [2021-11-06 14:44:38,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660993205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:44:38,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:44:38,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:44:38,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392177368] [2021-11-06 14:44:38,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:44:38,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:44:38,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:44:38,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:44:38,949 INFO L87 Difference]: Start difference. First operand has 2753 states, 2751 states have (on average 1.490367139222101) internal successors, (4100), 2752 states have internal predecessors, (4100), 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 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2021-11-06 14:44:41,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:44:41,470 INFO L93 Difference]: Finished difference Result 8166 states and 12178 transitions. [2021-11-06 14:44:41,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:44:41,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 38 [2021-11-06 14:44:41,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:44:41,512 INFO L225 Difference]: With dead ends: 8166 [2021-11-06 14:44:41,512 INFO L226 Difference]: Without dead ends: 5404 [2021-11-06 14:44:41,525 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:44:41,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5404 states. [2021-11-06 14:44:41,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5404 to 5404. [2021-11-06 14:44:41,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5404 states, 5403 states have (on average 1.4614103275957802) internal successors, (7896), 5403 states have internal predecessors, (7896), 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) [2021-11-06 14:44:41,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5404 states to 5404 states and 7896 transitions. [2021-11-06 14:44:41,721 INFO L78 Accepts]: Start accepts. Automaton has 5404 states and 7896 transitions. Word has length 38 [2021-11-06 14:44:41,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:44:41,722 INFO L470 AbstractCegarLoop]: Abstraction has 5404 states and 7896 transitions. [2021-11-06 14:44:41,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2021-11-06 14:44:41,722 INFO L276 IsEmpty]: Start isEmpty. Operand 5404 states and 7896 transitions. [2021-11-06 14:44:41,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-06 14:44:41,727 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:44:41,727 INFO L513 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] [2021-11-06 14:44:41,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 14:44:41,728 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:44:41,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:44:41,729 INFO L85 PathProgramCache]: Analyzing trace with hash 24310010, now seen corresponding path program 1 times [2021-11-06 14:44:41,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:44:41,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120296116] [2021-11-06 14:44:41,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:44:41,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:44:41,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:44:42,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:44:42,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:44:42,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120296116] [2021-11-06 14:44:42,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120296116] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:44:42,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:44:42,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:44:42,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101932705] [2021-11-06 14:44:42,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:44:42,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:44:42,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:44:42,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:44:42,184 INFO L87 Difference]: Start difference. First operand 5404 states and 7896 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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) [2021-11-06 14:44:42,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:44:42,780 INFO L93 Difference]: Finished difference Result 16116 states and 23573 transitions. [2021-11-06 14:44:42,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:44:42,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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 46 [2021-11-06 14:44:42,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:44:42,821 INFO L225 Difference]: With dead ends: 16116 [2021-11-06 14:44:42,822 INFO L226 Difference]: Without dead ends: 10749 [2021-11-06 14:44:42,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:44:42,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10749 states. [2021-11-06 14:44:43,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10749 to 10733. [2021-11-06 14:44:43,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10733 states, 10732 states have (on average 1.4627282892284756) internal successors, (15698), 10732 states have internal predecessors, (15698), 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) [2021-11-06 14:44:43,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10733 states to 10733 states and 15698 transitions. [2021-11-06 14:44:43,114 INFO L78 Accepts]: Start accepts. Automaton has 10733 states and 15698 transitions. Word has length 46 [2021-11-06 14:44:43,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:44:43,115 INFO L470 AbstractCegarLoop]: Abstraction has 10733 states and 15698 transitions. [2021-11-06 14:44:43,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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) [2021-11-06 14:44:43,116 INFO L276 IsEmpty]: Start isEmpty. Operand 10733 states and 15698 transitions. [2021-11-06 14:44:43,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-06 14:44:43,124 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:44:43,124 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:44:43,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 14:44:43,125 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:44:43,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:44:43,134 INFO L85 PathProgramCache]: Analyzing trace with hash 224524464, now seen corresponding path program 1 times [2021-11-06 14:44:43,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:44:43,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084193186] [2021-11-06 14:44:43,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:44:43,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:44:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:44:43,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:44:43,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:44:43,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084193186] [2021-11-06 14:44:43,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084193186] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:44:43,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:44:43,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:44:43,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509332029] [2021-11-06 14:44:43,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:44:43,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:44:43,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:44:43,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:44:43,486 INFO L87 Difference]: Start difference. First operand 10733 states and 15698 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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) [2021-11-06 14:44:43,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:44:43,985 INFO L93 Difference]: Finished difference Result 23393 states and 34137 transitions. [2021-11-06 14:44:43,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:44:43,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 77 [2021-11-06 14:44:43,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:44:44,045 INFO L225 Difference]: With dead ends: 23393 [2021-11-06 14:44:44,046 INFO L226 Difference]: Without dead ends: 12707 [2021-11-06 14:44:44,066 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:44:44,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12707 states. [2021-11-06 14:44:44,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12707 to 12695. [2021-11-06 14:44:44,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12695 states, 12694 states have (on average 1.4558058925476602) internal successors, (18480), 12694 states have internal predecessors, (18480), 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) [2021-11-06 14:44:44,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12695 states to 12695 states and 18480 transitions. [2021-11-06 14:44:44,374 INFO L78 Accepts]: Start accepts. Automaton has 12695 states and 18480 transitions. Word has length 77 [2021-11-06 14:44:44,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:44:44,376 INFO L470 AbstractCegarLoop]: Abstraction has 12695 states and 18480 transitions. [2021-11-06 14:44:44,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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) [2021-11-06 14:44:44,377 INFO L276 IsEmpty]: Start isEmpty. Operand 12695 states and 18480 transitions. [2021-11-06 14:44:44,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-06 14:44:44,381 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:44:44,381 INFO L513 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] [2021-11-06 14:44:44,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 14:44:44,382 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:44:44,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:44:44,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1093431886, now seen corresponding path program 1 times [2021-11-06 14:44:44,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:44:44,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116441012] [2021-11-06 14:44:44,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:44:44,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:44:44,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:44:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:44:44,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:44:44,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116441012] [2021-11-06 14:44:44,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116441012] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:44:44,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:44:44,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:44:44,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549054757] [2021-11-06 14:44:44,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:44:44,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:44:44,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:44:44,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:44:44,689 INFO L87 Difference]: Start difference. First operand 12695 states and 18480 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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) [2021-11-06 14:44:45,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:44:45,120 INFO L93 Difference]: Finished difference Result 34253 states and 50040 transitions. [2021-11-06 14:44:45,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:44:45,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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 [2021-11-06 14:44:45,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:44:45,178 INFO L225 Difference]: With dead ends: 34253 [2021-11-06 14:44:45,178 INFO L226 Difference]: Without dead ends: 21605 [2021-11-06 14:44:45,205 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:44:45,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21605 states. [2021-11-06 14:44:45,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21605 to 21587. [2021-11-06 14:44:45,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21587 states, 21586 states have (on average 1.4635411841008061) internal successors, (31592), 21586 states have internal predecessors, (31592), 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) [2021-11-06 14:44:45,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21587 states to 21587 states and 31592 transitions. [2021-11-06 14:44:45,860 INFO L78 Accepts]: Start accepts. Automaton has 21587 states and 31592 transitions. Word has length 81 [2021-11-06 14:44:45,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:44:45,860 INFO L470 AbstractCegarLoop]: Abstraction has 21587 states and 31592 transitions. [2021-11-06 14:44:45,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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) [2021-11-06 14:44:45,861 INFO L276 IsEmpty]: Start isEmpty. Operand 21587 states and 31592 transitions. [2021-11-06 14:44:45,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-06 14:44:45,870 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:44:45,870 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:44:45,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 14:44:45,871 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:44:45,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:44:45,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1828511617, now seen corresponding path program 1 times [2021-11-06 14:44:45,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:44:45,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618511732] [2021-11-06 14:44:45,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:44:45,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:44:46,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:44:46,276 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:44:46,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:44:46,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618511732] [2021-11-06 14:44:46,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618511732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:44:46,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:44:46,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:44:46,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373953699] [2021-11-06 14:44:46,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:44:46,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:44:46,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:44:46,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:44:46,278 INFO L87 Difference]: Start difference. First operand 21587 states and 31592 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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) [2021-11-06 14:44:48,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:44:48,036 INFO L93 Difference]: Finished difference Result 107400 states and 157263 transitions. [2021-11-06 14:44:48,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:44:48,036 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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 93 [2021-11-06 14:44:48,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:44:48,269 INFO L225 Difference]: With dead ends: 107400 [2021-11-06 14:44:48,270 INFO L226 Difference]: Without dead ends: 85860 [2021-11-06 14:44:48,547 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:44:48,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85860 states. [2021-11-06 14:44:49,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85860 to 21603. [2021-11-06 14:44:49,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21603 states, 21602 states have (on average 1.463197852050736) internal successors, (31608), 21602 states have internal predecessors, (31608), 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) [2021-11-06 14:44:49,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21603 states to 21603 states and 31608 transitions. [2021-11-06 14:44:49,635 INFO L78 Accepts]: Start accepts. Automaton has 21603 states and 31608 transitions. Word has length 93 [2021-11-06 14:44:49,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:44:49,638 INFO L470 AbstractCegarLoop]: Abstraction has 21603 states and 31608 transitions. [2021-11-06 14:44:49,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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) [2021-11-06 14:44:49,639 INFO L276 IsEmpty]: Start isEmpty. Operand 21603 states and 31608 transitions. [2021-11-06 14:44:49,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-06 14:44:49,655 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:44:49,655 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:44:49,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 14:44:49,656 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:44:49,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:44:49,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1200765987, now seen corresponding path program 1 times [2021-11-06 14:44:49,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:44:49,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006217456] [2021-11-06 14:44:49,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:44:49,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:44:49,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:44:50,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:44:50,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:44:50,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006217456] [2021-11-06 14:44:50,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006217456] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:44:50,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:44:50,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:44:50,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420846467] [2021-11-06 14:44:50,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:44:50,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:44:50,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:44:50,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:44:50,035 INFO L87 Difference]: Start difference. First operand 21603 states and 31608 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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) [2021-11-06 14:44:51,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:44:51,192 INFO L93 Difference]: Finished difference Result 58187 states and 85266 transitions. [2021-11-06 14:44:51,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:44:51,192 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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 96 [2021-11-06 14:44:51,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:44:51,293 INFO L225 Difference]: With dead ends: 58187 [2021-11-06 14:44:51,293 INFO L226 Difference]: Without dead ends: 36631 [2021-11-06 14:44:51,328 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:44:51,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36631 states. [2021-11-06 14:44:51,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36631 to 21603. [2021-11-06 14:44:51,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21603 states, 21602 states have (on average 1.4628275159707433) internal successors, (31600), 21602 states have internal predecessors, (31600), 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) [2021-11-06 14:44:51,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21603 states to 21603 states and 31600 transitions. [2021-11-06 14:44:51,890 INFO L78 Accepts]: Start accepts. Automaton has 21603 states and 31600 transitions. Word has length 96 [2021-11-06 14:44:51,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:44:51,890 INFO L470 AbstractCegarLoop]: Abstraction has 21603 states and 31600 transitions. [2021-11-06 14:44:51,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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) [2021-11-06 14:44:51,891 INFO L276 IsEmpty]: Start isEmpty. Operand 21603 states and 31600 transitions. [2021-11-06 14:44:51,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-06 14:44:51,901 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:44:51,902 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:44:51,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 14:44:51,902 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:44:51,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:44:51,903 INFO L85 PathProgramCache]: Analyzing trace with hash -2073132955, now seen corresponding path program 1 times [2021-11-06 14:44:51,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:44:51,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528284172] [2021-11-06 14:44:51,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:44:51,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:44:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:44:52,413 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:44:52,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:44:52,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528284172] [2021-11-06 14:44:52,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528284172] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:44:52,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563707008] [2021-11-06 14:44:52,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:44:52,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:44:52,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:44:52,416 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) [2021-11-06 14:44:52,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-06 14:44:54,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:44:54,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 5493 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-06 14:44:54,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:44:54,644 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:44:54,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563707008] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:44:54,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:44:54,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-06 14:44:54,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936658328] [2021-11-06 14:44:54,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:44:54,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:44:54,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:44:54,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:44:54,647 INFO L87 Difference]: Start difference. First operand 21603 states and 31600 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2021-11-06 14:44:57,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:44:57,369 INFO L93 Difference]: Finished difference Result 43184 states and 63173 transitions. [2021-11-06 14:44:57,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:44:57,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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 96 [2021-11-06 14:44:57,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:44:57,422 INFO L225 Difference]: With dead ends: 43184 [2021-11-06 14:44:57,422 INFO L226 Difference]: Without dead ends: 21618 [2021-11-06 14:44:57,454 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-06 14:44:57,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21618 states. [2021-11-06 14:44:57,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21618 to 21608. [2021-11-06 14:44:57,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21608 states, 21607 states have (on average 1.4626278520849725) internal successors, (31603), 21607 states have internal predecessors, (31603), 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) [2021-11-06 14:44:57,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21608 states to 21608 states and 31603 transitions. [2021-11-06 14:44:57,975 INFO L78 Accepts]: Start accepts. Automaton has 21608 states and 31603 transitions. Word has length 96 [2021-11-06 14:44:57,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:44:57,975 INFO L470 AbstractCegarLoop]: Abstraction has 21608 states and 31603 transitions. [2021-11-06 14:44:57,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2021-11-06 14:44:57,976 INFO L276 IsEmpty]: Start isEmpty. Operand 21608 states and 31603 transitions. [2021-11-06 14:44:57,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-06 14:44:57,988 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:44:57,988 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:44:58,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-06 14:44:58,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:44:58,204 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:44:58,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:44:58,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1871309021, now seen corresponding path program 1 times [2021-11-06 14:44:58,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:44:58,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058244022] [2021-11-06 14:44:58,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:44:58,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:44:58,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:44:58,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:44:58,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:44:58,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058244022] [2021-11-06 14:44:58,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058244022] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:44:58,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772349557] [2021-11-06 14:44:58,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:44:58,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:44:58,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:44:58,546 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:44:58,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-06 14:45:00,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:00,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 5493 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 14:45:00,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:45:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:45:00,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772349557] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:45:00,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:45:00,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-06 14:45:00,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587423885] [2021-11-06 14:45:00,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:45:00,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:45:00,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:45:00,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:45:00,742 INFO L87 Difference]: Start difference. First operand 21608 states and 31603 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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) [2021-11-06 14:45:04,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:45:04,228 INFO L93 Difference]: Finished difference Result 64728 states and 94691 transitions. [2021-11-06 14:45:04,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:45:04,229 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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 96 [2021-11-06 14:45:04,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:45:04,357 INFO L225 Difference]: With dead ends: 64728 [2021-11-06 14:45:04,357 INFO L226 Difference]: Without dead ends: 64716 [2021-11-06 14:45:04,378 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:45:04,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64716 states. [2021-11-06 14:45:05,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64716 to 57536. [2021-11-06 14:45:05,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57536 states, 57535 states have (on average 1.4659772312505432) internal successors, (84345), 57535 states have internal predecessors, (84345), 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) [2021-11-06 14:45:05,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57536 states to 57536 states and 84345 transitions. [2021-11-06 14:45:05,998 INFO L78 Accepts]: Start accepts. Automaton has 57536 states and 84345 transitions. Word has length 96 [2021-11-06 14:45:05,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:45:05,999 INFO L470 AbstractCegarLoop]: Abstraction has 57536 states and 84345 transitions. [2021-11-06 14:45:05,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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) [2021-11-06 14:45:05,999 INFO L276 IsEmpty]: Start isEmpty. Operand 57536 states and 84345 transitions. [2021-11-06 14:45:06,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-06 14:45:06,035 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:45:06,035 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:45:06,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-06 14:45:06,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-06 14:45:06,248 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:45:06,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:45:06,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1346718497, now seen corresponding path program 1 times [2021-11-06 14:45:06,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:45:06,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369455925] [2021-11-06 14:45:06,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:06,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:45:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:06,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:45:06,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:45:06,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369455925] [2021-11-06 14:45:06,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369455925] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:45:06,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:45:06,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:45:06,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130401815] [2021-11-06 14:45:06,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:45:06,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:45:06,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:45:06,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:45:06,878 INFO L87 Difference]: Start difference. First operand 57536 states and 84345 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2021-11-06 14:45:10,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:45:10,888 INFO L93 Difference]: Finished difference Result 138471 states and 203314 transitions. [2021-11-06 14:45:10,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:45:10,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 97 [2021-11-06 14:45:10,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:45:11,027 INFO L225 Difference]: With dead ends: 138471 [2021-11-06 14:45:11,027 INFO L226 Difference]: Without dead ends: 80982 [2021-11-06 14:45:11,094 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:45:11,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80982 states. [2021-11-06 14:45:13,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80982 to 80940. [2021-11-06 14:45:13,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80940 states, 80939 states have (on average 1.4691681389688531) internal successors, (118913), 80939 states have internal predecessors, (118913), 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) [2021-11-06 14:45:13,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80940 states to 80940 states and 118913 transitions. [2021-11-06 14:45:13,298 INFO L78 Accepts]: Start accepts. Automaton has 80940 states and 118913 transitions. Word has length 97 [2021-11-06 14:45:13,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:45:13,298 INFO L470 AbstractCegarLoop]: Abstraction has 80940 states and 118913 transitions. [2021-11-06 14:45:13,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2021-11-06 14:45:13,298 INFO L276 IsEmpty]: Start isEmpty. Operand 80940 states and 118913 transitions. [2021-11-06 14:45:13,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-06 14:45:13,311 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:45:13,312 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:45:13,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-06 14:45:13,312 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:45:13,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:45:13,312 INFO L85 PathProgramCache]: Analyzing trace with hash 594711244, now seen corresponding path program 1 times [2021-11-06 14:45:13,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:45:13,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356846536] [2021-11-06 14:45:13,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:13,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:45:13,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:13,610 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:45:13,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:45:13,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356846536] [2021-11-06 14:45:13,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356846536] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:45:13,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:45:13,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:45:13,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789848134] [2021-11-06 14:45:13,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:45:13,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:45:13,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:45:13,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:45:13,614 INFO L87 Difference]: Start difference. First operand 80940 states and 118913 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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) [2021-11-06 14:45:17,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:45:17,134 INFO L93 Difference]: Finished difference Result 123388 states and 181214 transitions. [2021-11-06 14:45:17,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:45:17,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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 104 [2021-11-06 14:45:17,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:45:17,199 INFO L225 Difference]: With dead ends: 123388 [2021-11-06 14:45:17,199 INFO L226 Difference]: Without dead ends: 42391 [2021-11-06 14:45:17,259 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:45:17,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42391 states. [2021-11-06 14:45:18,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42391 to 42365. [2021-11-06 14:45:18,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42365 states, 42364 states have (on average 1.4657964309319234) internal successors, (62097), 42364 states have internal predecessors, (62097), 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) [2021-11-06 14:45:18,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42365 states to 42365 states and 62097 transitions. [2021-11-06 14:45:18,381 INFO L78 Accepts]: Start accepts. Automaton has 42365 states and 62097 transitions. Word has length 104 [2021-11-06 14:45:18,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:45:18,381 INFO L470 AbstractCegarLoop]: Abstraction has 42365 states and 62097 transitions. [2021-11-06 14:45:18,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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) [2021-11-06 14:45:18,382 INFO L276 IsEmpty]: Start isEmpty. Operand 42365 states and 62097 transitions. [2021-11-06 14:45:18,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-06 14:45:18,400 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:45:18,401 INFO L513 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:45:18,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-06 14:45:18,402 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:45:18,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:45:18,402 INFO L85 PathProgramCache]: Analyzing trace with hash -112229699, now seen corresponding path program 1 times [2021-11-06 14:45:18,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:45:18,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248700216] [2021-11-06 14:45:18,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:18,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:45:18,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:18,798 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-06 14:45:18,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:45:18,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248700216] [2021-11-06 14:45:18,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248700216] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:45:18,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:45:18,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:45:18,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728613730] [2021-11-06 14:45:18,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:45:18,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:45:18,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:45:18,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:45:18,802 INFO L87 Difference]: Start difference. First operand 42365 states and 62097 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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) [2021-11-06 14:45:20,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:45:20,582 INFO L93 Difference]: Finished difference Result 105613 states and 154847 transitions. [2021-11-06 14:45:20,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:45:20,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 116 [2021-11-06 14:45:20,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:45:20,723 INFO L225 Difference]: With dead ends: 105613 [2021-11-06 14:45:20,723 INFO L226 Difference]: Without dead ends: 84419 [2021-11-06 14:45:20,767 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:45:20,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84419 states. [2021-11-06 14:45:22,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84419 to 42391. [2021-11-06 14:45:22,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42391 states, 42390 states have (on average 1.4655107336636) internal successors, (62123), 42390 states have internal predecessors, (62123), 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) [2021-11-06 14:45:22,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42391 states to 42391 states and 62123 transitions. [2021-11-06 14:45:22,272 INFO L78 Accepts]: Start accepts. Automaton has 42391 states and 62123 transitions. Word has length 116 [2021-11-06 14:45:22,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:45:22,273 INFO L470 AbstractCegarLoop]: Abstraction has 42391 states and 62123 transitions. [2021-11-06 14:45:22,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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) [2021-11-06 14:45:22,273 INFO L276 IsEmpty]: Start isEmpty. Operand 42391 states and 62123 transitions. [2021-11-06 14:45:22,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-06 14:45:22,289 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:45:22,289 INFO L513 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:45:22,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-06 14:45:22,290 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:45:22,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:45:22,291 INFO L85 PathProgramCache]: Analyzing trace with hash 756383260, now seen corresponding path program 1 times [2021-11-06 14:45:22,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:45:22,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022925666] [2021-11-06 14:45:22,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:22,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:45:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:22,792 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-06 14:45:22,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:45:22,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022925666] [2021-11-06 14:45:22,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022925666] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:45:22,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:45:22,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:45:22,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722413365] [2021-11-06 14:45:22,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:45:22,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:45:22,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:45:22,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:45:22,796 INFO L87 Difference]: Start difference. First operand 42391 states and 62123 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 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) [2021-11-06 14:45:26,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:45:26,474 INFO L93 Difference]: Finished difference Result 104567 states and 153324 transitions. [2021-11-06 14:45:26,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:45:26,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 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 118 [2021-11-06 14:45:26,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:45:26,564 INFO L225 Difference]: With dead ends: 104567 [2021-11-06 14:45:26,564 INFO L226 Difference]: Without dead ends: 59315 [2021-11-06 14:45:26,610 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:45:26,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59315 states. [2021-11-06 14:45:27,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59315 to 39807. [2021-11-06 14:45:28,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39807 states, 39806 states have (on average 1.468547455157514) internal successors, (58457), 39806 states have internal predecessors, (58457), 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) [2021-11-06 14:45:28,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39807 states to 39807 states and 58457 transitions. [2021-11-06 14:45:28,062 INFO L78 Accepts]: Start accepts. Automaton has 39807 states and 58457 transitions. Word has length 118 [2021-11-06 14:45:28,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:45:28,063 INFO L470 AbstractCegarLoop]: Abstraction has 39807 states and 58457 transitions. [2021-11-06 14:45:28,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 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) [2021-11-06 14:45:28,063 INFO L276 IsEmpty]: Start isEmpty. Operand 39807 states and 58457 transitions. [2021-11-06 14:45:28,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-06 14:45:28,076 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:45:28,077 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:45:28,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-06 14:45:28,077 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:45:28,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:45:28,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1418619509, now seen corresponding path program 1 times [2021-11-06 14:45:28,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:45:28,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652473649] [2021-11-06 14:45:28,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:28,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:45:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:28,517 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:45:28,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:45:28,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652473649] [2021-11-06 14:45:28,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652473649] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:45:28,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:45:28,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:45:28,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626839880] [2021-11-06 14:45:28,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:45:28,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:45:28,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:45:28,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:45:28,520 INFO L87 Difference]: Start difference. First operand 39807 states and 58457 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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) [2021-11-06 14:45:31,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:45:31,915 INFO L93 Difference]: Finished difference Result 79400 states and 116673 transitions. [2021-11-06 14:45:31,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:45:31,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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 120 [2021-11-06 14:45:31,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:45:31,981 INFO L225 Difference]: With dead ends: 79400 [2021-11-06 14:45:31,981 INFO L226 Difference]: Without dead ends: 40694 [2021-11-06 14:45:32,021 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:45:32,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40694 states.