./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--can--can-dev.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--can--can-dev.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 4442f8b76e61cf25cc45d29938cede5ddeca8e04e09b48cb8e4f2b249d1a9c57 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 14:32:57,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 14:32:57,341 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 14:32:57,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 14:32:57,398 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 14:32:57,400 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 14:32:57,401 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 14:32:57,403 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 14:32:57,404 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 14:32:57,407 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 14:32:57,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 14:32:57,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 14:32:57,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 14:32:57,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 14:32:57,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 14:32:57,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 14:32:57,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 14:32:57,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 14:32:57,417 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 14:32:57,421 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 14:32:57,422 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 14:32:57,422 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 14:32:57,423 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 14:32:57,424 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 14:32:57,429 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 14:32:57,429 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 14:32:57,429 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 14:32:57,430 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 14:32:57,431 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 14:32:57,431 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 14:32:57,431 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 14:32:57,432 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 14:32:57,433 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 14:32:57,434 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 14:32:57,434 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 14:32:57,435 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 14:32:57,435 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 14:32:57,435 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 14:32:57,435 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 14:32:57,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 14:32:57,437 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 14:32:57,437 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 14:32:57,461 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 14:32:57,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 14:32:57,462 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 14:32:57,462 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 14:32:57,462 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 14:32:57,463 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 14:32:57,463 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 14:32:57,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 14:32:57,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 14:32:57,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 14:32:57,464 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 14:32:57,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 14:32:57,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 14:32:57,464 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 14:32:57,464 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 14:32:57,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 14:32:57,465 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 14:32:57,465 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 14:32:57,465 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 14:32:57,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:32:57,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 14:32:57,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 14:32:57,465 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 14:32:57,466 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 14:32:57,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 14:32:57,466 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 14:32:57,466 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 14:32:57,467 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 14:32:57,467 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 14:32:57,467 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4442f8b76e61cf25cc45d29938cede5ddeca8e04e09b48cb8e4f2b249d1a9c57 [2021-11-06 14:32:57,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 14:32:57,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 14:32:57,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 14:32:57,679 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 14:32:57,680 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 14:32:57,681 INFO L432 ainManager$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--can--can-dev.ko-entry_point.cil.out.i [2021-11-06 14:32:57,755 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61254c977/83d3e259630f425681c2a89d7e66df52/FLAG778c0b6a5 [2021-11-06 14:32:58,374 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 14:32:58,375 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--can--can-dev.ko-entry_point.cil.out.i [2021-11-06 14:32:58,412 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61254c977/83d3e259630f425681c2a89d7e66df52/FLAG778c0b6a5 [2021-11-06 14:32:58,718 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61254c977/83d3e259630f425681c2a89d7e66df52 [2021-11-06 14:32:58,720 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 14:32:58,722 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 14:32:58,723 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 14:32:58,723 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 14:32:58,736 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 14:32:58,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:32:58" (1/1) ... [2021-11-06 14:32:58,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41a2cf8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:32:58, skipping insertion in model container [2021-11-06 14:32:58,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:32:58" (1/1) ... [2021-11-06 14:32:58,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 14:32:58,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 14:32:59,358 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--can--can-dev.ko-entry_point.cil.out.i[167793,167806] [2021-11-06 14:32:59,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:32:59,800 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 14:32:59,890 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--can--can-dev.ko-entry_point.cil.out.i[167793,167806] [2021-11-06 14:33:00,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:33:00,045 INFO L208 MainTranslator]: Completed translation [2021-11-06 14:33:00,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:33:00 WrapperNode [2021-11-06 14:33:00,046 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 14:33:00,048 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 14:33:00,048 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 14:33:00,048 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 14:33:00,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:33:00" (1/1) ... [2021-11-06 14:33:00,125 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:33:00" (1/1) ... [2021-11-06 14:33:00,378 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 14:33:00,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 14:33:00,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 14:33:00,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 14:33:00,385 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:33:00" (1/1) ... [2021-11-06 14:33:00,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:33:00" (1/1) ... [2021-11-06 14:33:00,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:33:00" (1/1) ... [2021-11-06 14:33:00,436 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:33:00" (1/1) ... [2021-11-06 14:33:00,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:33:00" (1/1) ... [2021-11-06 14:33:00,653 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:33:00" (1/1) ... [2021-11-06 14:33:00,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:33:00" (1/1) ... [2021-11-06 14:33:00,714 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 14:33:00,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 14:33:00,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 14:33:00,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 14:33:00,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:33:00" (1/1) ... [2021-11-06 14:33:00,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:33:00,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:33:00,781 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 14:33:00,814 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 14:33:00,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 14:33:00,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-06 14:33:00,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-06 14:33:00,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 14:33:00,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 14:33:00,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 14:33:00,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 14:33:00,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 14:33:00,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 14:33:00,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 14:33:00,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 14:33:00,832 INFO L130 BoogieDeclarations]: Found specification of procedure can_fill_info [2021-11-06 14:33:00,832 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fill_info [2021-11-06 14:33:00,832 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-06 14:33:00,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-06 14:33:00,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 14:33:00,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-06 14:33:00,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 14:33:00,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 14:33:08,684 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 14:33:08,685 INFO L299 CfgBuilder]: Removed 1345 assume(true) statements. [2021-11-06 14:33:08,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:33:08 BoogieIcfgContainer [2021-11-06 14:33:08,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 14:33:08,689 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 14:33:08,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 14:33:08,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 14:33:08,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 02:32:58" (1/3) ... [2021-11-06 14:33:08,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cff5918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:33:08, skipping insertion in model container [2021-11-06 14:33:08,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:33:00" (2/3) ... [2021-11-06 14:33:08,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cff5918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:33:08, skipping insertion in model container [2021-11-06 14:33:08,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:33:08" (3/3) ... [2021-11-06 14:33:08,693 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--can--can-dev.ko-entry_point.cil.out.i [2021-11-06 14:33:08,696 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 14:33:08,696 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-06 14:33:08,728 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 14:33:08,731 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 14:33:08,735 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-06 14:33:08,785 INFO L276 IsEmpty]: Start isEmpty. Operand has 1820 states, 1810 states have (on average 1.4850828729281769) internal successors, (2688), 1811 states have internal predecessors, (2688), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-06 14:33:08,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-06 14:33:08,791 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:33:08,791 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] [2021-11-06 14:33:08,792 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:33:08,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:33:08,795 INFO L85 PathProgramCache]: Analyzing trace with hash -636873605, now seen corresponding path program 1 times [2021-11-06 14:33:08,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:33:08,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619798779] [2021-11-06 14:33:08,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:08,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:33:09,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:33:09,167 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 14:33:09,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:33:09,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619798779] [2021-11-06 14:33:09,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619798779] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:33:09,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:33:09,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:33:09,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506157448] [2021-11-06 14:33:09,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:33:09,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:33:09,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:33:09,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:33:09,187 INFO L87 Difference]: Start difference. First operand has 1820 states, 1810 states have (on average 1.4850828729281769) internal successors, (2688), 1811 states have internal predecessors, (2688), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 14:33:09,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:33:09,570 INFO L93 Difference]: Finished difference Result 5402 states and 8026 transitions. [2021-11-06 14:33:09,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:33:09,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 20 [2021-11-06 14:33:09,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:33:09,596 INFO L225 Difference]: With dead ends: 5402 [2021-11-06 14:33:09,596 INFO L226 Difference]: Without dead ends: 3553 [2021-11-06 14:33:09,605 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 14:33:09,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3553 states. [2021-11-06 14:33:09,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3553 to 3553. [2021-11-06 14:33:09,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3553 states, 3536 states have (on average 1.4369343891402715) internal successors, (5081), 3536 states have internal predecessors, (5081), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-06 14:33:09,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3553 states to 3553 states and 5105 transitions. [2021-11-06 14:33:09,738 INFO L78 Accepts]: Start accepts. Automaton has 3553 states and 5105 transitions. Word has length 20 [2021-11-06 14:33:09,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:33:09,739 INFO L470 AbstractCegarLoop]: Abstraction has 3553 states and 5105 transitions. [2021-11-06 14:33:09,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 14:33:09,739 INFO L276 IsEmpty]: Start isEmpty. Operand 3553 states and 5105 transitions. [2021-11-06 14:33:09,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-06 14:33:09,743 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:33:09,743 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] [2021-11-06 14:33:09,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 14:33:09,744 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:33:09,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:33:09,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1054608242, now seen corresponding path program 1 times [2021-11-06 14:33:09,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:33:09,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455767312] [2021-11-06 14:33:09,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:09,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:33:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:33:09,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:33:09,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:33:09,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455767312] [2021-11-06 14:33:09,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455767312] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:33:09,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:33:09,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:33:09,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331909783] [2021-11-06 14:33:09,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:33:09,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:33:09,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:33:09,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:33:09,851 INFO L87 Difference]: Start difference. First operand 3553 states and 5105 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 14:33:10,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:33:10,342 INFO L93 Difference]: Finished difference Result 10639 states and 15294 transitions. [2021-11-06 14:33:10,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:33:10,342 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 26 [2021-11-06 14:33:10,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:33:10,367 INFO L225 Difference]: With dead ends: 10639 [2021-11-06 14:33:10,367 INFO L226 Difference]: Without dead ends: 7089 [2021-11-06 14:33:10,377 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 14:33:10,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7089 states. [2021-11-06 14:33:10,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7089 to 6969. [2021-11-06 14:33:10,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6969 states, 6936 states have (on average 1.4391580161476356) internal successors, (9982), 6936 states have internal predecessors, (9982), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-06 14:33:10,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6969 states to 6969 states and 10030 transitions. [2021-11-06 14:33:10,505 INFO L78 Accepts]: Start accepts. Automaton has 6969 states and 10030 transitions. Word has length 26 [2021-11-06 14:33:10,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:33:10,505 INFO L470 AbstractCegarLoop]: Abstraction has 6969 states and 10030 transitions. [2021-11-06 14:33:10,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 14:33:10,505 INFO L276 IsEmpty]: Start isEmpty. Operand 6969 states and 10030 transitions. [2021-11-06 14:33:10,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-06 14:33:10,516 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:33:10,517 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] [2021-11-06 14:33:10,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 14:33:10,519 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:33:10,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:33:10,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1900546352, now seen corresponding path program 1 times [2021-11-06 14:33:10,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:33:10,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090927615] [2021-11-06 14:33:10,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:10,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:33:10,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:33:10,676 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 14:33:10,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:33:10,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090927615] [2021-11-06 14:33:10,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090927615] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:33:10,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:33:10,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:33:10,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709198379] [2021-11-06 14:33:10,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:33:10,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:33:10,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:33:10,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:33:10,679 INFO L87 Difference]: Start difference. First operand 6969 states and 10030 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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 14:33:12,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:33:12,576 INFO L93 Difference]: Finished difference Result 27021 states and 38914 transitions. [2021-11-06 14:33:12,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:33:12,576 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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 70 [2021-11-06 14:33:12,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:33:12,635 INFO L225 Difference]: With dead ends: 27021 [2021-11-06 14:33:12,635 INFO L226 Difference]: Without dead ends: 20061 [2021-11-06 14:33:12,650 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:33:12,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20061 states. [2021-11-06 14:33:12,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20061 to 20045. [2021-11-06 14:33:12,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20045 states, 19948 states have (on average 1.438139161820734) internal successors, (28688), 19948 states have internal predecessors, (28688), 72 states have call successors, (72), 24 states have call predecessors, (72), 24 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-11-06 14:33:13,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20045 states to 20045 states and 28832 transitions. [2021-11-06 14:33:13,051 INFO L78 Accepts]: Start accepts. Automaton has 20045 states and 28832 transitions. Word has length 70 [2021-11-06 14:33:13,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:33:13,052 INFO L470 AbstractCegarLoop]: Abstraction has 20045 states and 28832 transitions. [2021-11-06 14:33:13,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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 14:33:13,052 INFO L276 IsEmpty]: Start isEmpty. Operand 20045 states and 28832 transitions. [2021-11-06 14:33:13,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-06 14:33:13,063 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:33:13,063 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 14:33:13,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 14:33:13,064 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:33:13,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:33:13,064 INFO L85 PathProgramCache]: Analyzing trace with hash -110241493, now seen corresponding path program 1 times [2021-11-06 14:33:13,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:33:13,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945337968] [2021-11-06 14:33:13,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:13,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:33:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:33:13,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:33:13,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:33:13,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945337968] [2021-11-06 14:33:13,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945337968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:33:13,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:33:13,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:33:13,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837041678] [2021-11-06 14:33:13,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:33:13,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:33:13,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:33:13,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:33:13,254 INFO L87 Difference]: Start difference. First operand 20045 states and 28832 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 14:33:14,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:33:14,517 INFO L93 Difference]: Finished difference Result 93068 states and 134517 transitions. [2021-11-06 14:33:14,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:33:14,517 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 71 [2021-11-06 14:33:14,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:33:14,700 INFO L225 Difference]: With dead ends: 93068 [2021-11-06 14:33:14,700 INFO L226 Difference]: Without dead ends: 73032 [2021-11-06 14:33:14,766 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 14:33:14,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73032 states. [2021-11-06 14:33:15,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73032 to 20149. [2021-11-06 14:33:15,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20149 states, 20052 states have (on average 1.435866746459206) internal successors, (28792), 20052 states have internal predecessors, (28792), 72 states have call successors, (72), 24 states have call predecessors, (72), 24 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-11-06 14:33:15,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20149 states to 20149 states and 28936 transitions. [2021-11-06 14:33:15,707 INFO L78 Accepts]: Start accepts. Automaton has 20149 states and 28936 transitions. Word has length 71 [2021-11-06 14:33:15,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:33:15,709 INFO L470 AbstractCegarLoop]: Abstraction has 20149 states and 28936 transitions. [2021-11-06 14:33:15,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 14:33:15,709 INFO L276 IsEmpty]: Start isEmpty. Operand 20149 states and 28936 transitions. [2021-11-06 14:33:15,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-06 14:33:15,722 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:33:15,722 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 14:33:15,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 14:33:15,722 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:33:15,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:33:15,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1159529646, now seen corresponding path program 1 times [2021-11-06 14:33:15,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:33:15,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009655815] [2021-11-06 14:33:15,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:15,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:33:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:33:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 14:33:16,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:33:16,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009655815] [2021-11-06 14:33:16,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009655815] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:33:16,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:33:16,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:33:16,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874455461] [2021-11-06 14:33:16,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:33:16,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:33:16,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:33:16,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:33:16,151 INFO L87 Difference]: Start difference. First operand 20149 states and 28936 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 14:33:17,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:33:17,005 INFO L93 Difference]: Finished difference Result 50122 states and 71995 transitions. [2021-11-06 14:33:17,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:33:17,006 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 74 [2021-11-06 14:33:17,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:33:17,052 INFO L225 Difference]: With dead ends: 50122 [2021-11-06 14:33:17,052 INFO L226 Difference]: Without dead ends: 29982 [2021-11-06 14:33:17,072 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 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 14:33:17,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29982 states. [2021-11-06 14:33:17,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29982 to 20167. [2021-11-06 14:33:17,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20167 states, 20070 states have (on average 1.4353263577478823) internal successors, (28807), 20070 states have internal predecessors, (28807), 72 states have call successors, (72), 24 states have call predecessors, (72), 24 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-11-06 14:33:17,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20167 states to 20167 states and 28951 transitions. [2021-11-06 14:33:17,597 INFO L78 Accepts]: Start accepts. Automaton has 20167 states and 28951 transitions. Word has length 74 [2021-11-06 14:33:17,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:33:17,599 INFO L470 AbstractCegarLoop]: Abstraction has 20167 states and 28951 transitions. [2021-11-06 14:33:17,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 14:33:17,600 INFO L276 IsEmpty]: Start isEmpty. Operand 20167 states and 28951 transitions. [2021-11-06 14:33:17,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-06 14:33:17,611 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:33:17,611 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 14:33:17,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 14:33:17,612 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:33:17,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:33:17,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1839588016, now seen corresponding path program 1 times [2021-11-06 14:33:17,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:33:17,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302846010] [2021-11-06 14:33:17,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:17,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:33:18,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:33:18,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:33:18,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:33:18,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302846010] [2021-11-06 14:33:18,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302846010] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:33:18,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:33:18,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-06 14:33:18,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155315532] [2021-11-06 14:33:18,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-06 14:33:18,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:33:18,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-06 14:33:18,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-06 14:33:18,588 INFO L87 Difference]: Start difference. First operand 20167 states and 28951 transitions. Second operand has 11 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 11 states have internal predecessors, (74), 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 14:33:23,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:33:23,652 INFO L93 Difference]: Finished difference Result 124134 states and 179920 transitions. [2021-11-06 14:33:23,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-06 14:33:23,653 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 11 states have internal predecessors, (74), 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 74 [2021-11-06 14:33:23,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:33:23,869 INFO L225 Difference]: With dead ends: 124134 [2021-11-06 14:33:23,869 INFO L226 Difference]: Without dead ends: 103976 [2021-11-06 14:33:23,909 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2021-11-06 14:33:23,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103976 states. [2021-11-06 14:33:25,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103976 to 20375. [2021-11-06 14:33:25,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20375 states, 20278 states have (on average 1.4282966762008087) internal successors, (28963), 20278 states have internal predecessors, (28963), 72 states have call successors, (72), 24 states have call predecessors, (72), 24 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-11-06 14:33:25,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20375 states to 20375 states and 29107 transitions. [2021-11-06 14:33:25,801 INFO L78 Accepts]: Start accepts. Automaton has 20375 states and 29107 transitions. Word has length 74 [2021-11-06 14:33:25,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:33:25,801 INFO L470 AbstractCegarLoop]: Abstraction has 20375 states and 29107 transitions. [2021-11-06 14:33:25,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 11 states have internal predecessors, (74), 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 14:33:25,804 INFO L276 IsEmpty]: Start isEmpty. Operand 20375 states and 29107 transitions. [2021-11-06 14:33:25,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-06 14:33:25,817 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:33:25,817 INFO L513 BasicCegarLoop]: trace histogram [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 14:33:25,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 14:33:25,818 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:33:25,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:33:25,818 INFO L85 PathProgramCache]: Analyzing trace with hash -849825764, now seen corresponding path program 1 times [2021-11-06 14:33:25,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:33:25,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021201528] [2021-11-06 14:33:25,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:25,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:33:25,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:33:25,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:33:25,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:33:25,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021201528] [2021-11-06 14:33:25,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021201528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:33:25,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:33:25,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:33:25,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969570810] [2021-11-06 14:33:25,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:33:25,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:33:25,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:33:25,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:33:25,912 INFO L87 Difference]: Start difference. First operand 20375 states and 29107 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 14:33:28,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:33:28,166 INFO L93 Difference]: Finished difference Result 49330 states and 70595 transitions. [2021-11-06 14:33:28,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:33:28,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 76 [2021-11-06 14:33:28,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:33:28,230 INFO L225 Difference]: With dead ends: 49330 [2021-11-06 14:33:28,230 INFO L226 Difference]: Without dead ends: 38987 [2021-11-06 14:33:28,250 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 14:33:28,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38987 states. [2021-11-06 14:33:29,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38987 to 20531. [2021-11-06 14:33:29,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20531 states, 20434 states have (on average 1.4250269159244398) internal successors, (29119), 20434 states have internal predecessors, (29119), 72 states have call successors, (72), 24 states have call predecessors, (72), 24 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-11-06 14:33:29,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20531 states to 20531 states and 29263 transitions. [2021-11-06 14:33:29,461 INFO L78 Accepts]: Start accepts. Automaton has 20531 states and 29263 transitions. Word has length 76 [2021-11-06 14:33:29,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:33:29,461 INFO L470 AbstractCegarLoop]: Abstraction has 20531 states and 29263 transitions. [2021-11-06 14:33:29,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 14:33:29,462 INFO L276 IsEmpty]: Start isEmpty. Operand 20531 states and 29263 transitions. [2021-11-06 14:33:29,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-06 14:33:29,474 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:33:29,474 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 14:33:29,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-06 14:33:29,474 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:33:29,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:33:29,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1669469059, now seen corresponding path program 1 times [2021-11-06 14:33:29,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:33:29,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282953534] [2021-11-06 14:33:29,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:29,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:33:29,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:33:29,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:33:29,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:33:29,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282953534] [2021-11-06 14:33:29,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282953534] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:33:29,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:33:29,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:33:29,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631225129] [2021-11-06 14:33:29,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:33:29,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:33:29,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:33:29,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:33:29,610 INFO L87 Difference]: Start difference. First operand 20531 states and 29263 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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 14:33:32,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:33:32,109 INFO L93 Difference]: Finished difference Result 49952 states and 71222 transitions. [2021-11-06 14:33:32,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:33:32,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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 78 [2021-11-06 14:33:32,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:33:32,160 INFO L225 Difference]: With dead ends: 49952 [2021-11-06 14:33:32,160 INFO L226 Difference]: Without dead ends: 29430 [2021-11-06 14:33:32,193 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 14:33:32,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29430 states. [2021-11-06 14:33:33,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29430 to 20297. [2021-11-06 14:33:33,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20297 states, 20200 states have (on average 1.4183663366336634) internal successors, (28651), 20200 states have internal predecessors, (28651), 72 states have call successors, (72), 24 states have call predecessors, (72), 24 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-11-06 14:33:33,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20297 states to 20297 states and 28795 transitions. [2021-11-06 14:33:33,512 INFO L78 Accepts]: Start accepts. Automaton has 20297 states and 28795 transitions. Word has length 78 [2021-11-06 14:33:33,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:33:33,513 INFO L470 AbstractCegarLoop]: Abstraction has 20297 states and 28795 transitions. [2021-11-06 14:33:33,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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 14:33:33,513 INFO L276 IsEmpty]: Start isEmpty. Operand 20297 states and 28795 transitions. [2021-11-06 14:33:33,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-06 14:33:33,525 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:33:33,525 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 14:33:33,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-06 14:33:33,525 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:33:33,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:33:33,526 INFO L85 PathProgramCache]: Analyzing trace with hash 135443171, now seen corresponding path program 1 times [2021-11-06 14:33:33,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:33:33,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932669331] [2021-11-06 14:33:33,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:33,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:33:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:33:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:33:33,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:33:33,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932669331] [2021-11-06 14:33:33,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932669331] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:33:33,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:33:33,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:33:33,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634673932] [2021-11-06 14:33:33,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:33:33,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:33:33,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:33:33,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:33:33,694 INFO L87 Difference]: Start difference. First operand 20297 states and 28795 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 14:33:34,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:33:34,858 INFO L93 Difference]: Finished difference Result 40637 states and 57684 transitions. [2021-11-06 14:33:34,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:33:34,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 79 [2021-11-06 14:33:34,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:33:34,899 INFO L225 Difference]: With dead ends: 40637 [2021-11-06 14:33:34,899 INFO L226 Difference]: Without dead ends: 20349 [2021-11-06 14:33:34,925 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 14:33:34,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20349 states. [2021-11-06 14:33:36,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20349 to 20349. [2021-11-06 14:33:36,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20349 states, 20252 states have (on average 1.4172921192968595) internal successors, (28703), 20252 states have internal predecessors, (28703), 72 states have call successors, (72), 24 states have call predecessors, (72), 24 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-11-06 14:33:36,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20349 states to 20349 states and 28847 transitions. [2021-11-06 14:33:36,485 INFO L78 Accepts]: Start accepts. Automaton has 20349 states and 28847 transitions. Word has length 79 [2021-11-06 14:33:36,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:33:36,485 INFO L470 AbstractCegarLoop]: Abstraction has 20349 states and 28847 transitions. [2021-11-06 14:33:36,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 14:33:36,485 INFO L276 IsEmpty]: Start isEmpty. Operand 20349 states and 28847 transitions. [2021-11-06 14:33:36,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-06 14:33:36,496 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:33:36,497 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 14:33:36,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-06 14:33:36,497 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:33:36,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:33:36,498 INFO L85 PathProgramCache]: Analyzing trace with hash 67353562, now seen corresponding path program 1 times [2021-11-06 14:33:36,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:33:36,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484380481] [2021-11-06 14:33:36,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:36,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:33:36,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:33:36,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:33:36,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:33:36,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484380481] [2021-11-06 14:33:36,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484380481] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:33:36,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464176240] [2021-11-06 14:33:36,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:36,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:33:36,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:33:36,715 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 14:33:36,716 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 14:33:38,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:33:38,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 2180 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-06 14:33:38,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:33:38,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:33:38,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464176240] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:33:38,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:33:38,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-06 14:33:38,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779166644] [2021-11-06 14:33:38,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:33:38,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:33:38,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:33:38,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:33:38,749 INFO L87 Difference]: Start difference. First operand 20349 states and 28847 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 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 14:33:39,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:33:39,977 INFO L93 Difference]: Finished difference Result 40741 states and 57788 transitions. [2021-11-06 14:33:39,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:33:39,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 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 80 [2021-11-06 14:33:39,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:33:40,025 INFO L225 Difference]: With dead ends: 40741 [2021-11-06 14:33:40,025 INFO L226 Difference]: Without dead ends: 20401 [2021-11-06 14:33:40,052 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:33:40,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20401 states. [2021-11-06 14:33:41,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20401 to 20401. [2021-11-06 14:33:41,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20401 states, 20304 states have (on average 1.4162234042553192) internal successors, (28755), 20304 states have internal predecessors, (28755), 72 states have call successors, (72), 24 states have call predecessors, (72), 24 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-11-06 14:33:41,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20401 states to 20401 states and 28899 transitions. [2021-11-06 14:33:41,373 INFO L78 Accepts]: Start accepts. Automaton has 20401 states and 28899 transitions. Word has length 80 [2021-11-06 14:33:41,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:33:41,374 INFO L470 AbstractCegarLoop]: Abstraction has 20401 states and 28899 transitions. [2021-11-06 14:33:41,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 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 14:33:41,374 INFO L276 IsEmpty]: Start isEmpty. Operand 20401 states and 28899 transitions. [2021-11-06 14:33:41,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-06 14:33:41,387 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:33:41,387 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 14:33:41,417 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 14:33:41,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-06 14:33:41,595 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:33:41,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:33:41,599 INFO L85 PathProgramCache]: Analyzing trace with hash -2043424317, now seen corresponding path program 2 times [2021-11-06 14:33:41,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:33:41,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109496097] [2021-11-06 14:33:41,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:41,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:33:41,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:33:41,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:33:41,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:33:41,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109496097] [2021-11-06 14:33:41,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109496097] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:33:41,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197327137] [2021-11-06 14:33:41,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:33:41,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:33:41,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:33:41,820 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 14:33:41,862 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 14:33:46,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:33:46,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:33:46,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 2186 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-06 14:33:46,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:33:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:33:47,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197327137] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:33:47,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:33:47,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [5] total 16 [2021-11-06 14:33:47,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813949660] [2021-11-06 14:33:47,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-06 14:33:47,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:33:47,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-06 14:33:47,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-11-06 14:33:47,197 INFO L87 Difference]: Start difference. First operand 20401 states and 28899 transitions. Second operand has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 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 14:33:56,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:33:56,065 INFO L93 Difference]: Finished difference Result 124108 states and 178516 transitions. [2021-11-06 14:33:56,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-06 14:33:56,066 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 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 14:33:56,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:33:56,259 INFO L225 Difference]: With dead ends: 124108 [2021-11-06 14:33:56,259 INFO L226 Difference]: Without dead ends: 103716 [2021-11-06 14:33:56,305 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=264, Invalid=858, Unknown=0, NotChecked=0, Total=1122 [2021-11-06 14:33:56,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103716 states. [2021-11-06 14:33:58,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103716 to 20921. [2021-11-06 14:33:58,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20921 states, 20824 states have (on average 1.4083269304648482) internal successors, (29327), 20824 states have internal predecessors, (29327), 72 states have call successors, (72), 24 states have call predecessors, (72), 24 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-11-06 14:33:58,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20921 states to 20921 states and 29471 transitions. [2021-11-06 14:33:58,458 INFO L78 Accepts]: Start accepts. Automaton has 20921 states and 29471 transitions. Word has length 81 [2021-11-06 14:33:58,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:33:58,458 INFO L470 AbstractCegarLoop]: Abstraction has 20921 states and 29471 transitions. [2021-11-06 14:33:58,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 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 14:33:58,458 INFO L276 IsEmpty]: Start isEmpty. Operand 20921 states and 29471 transitions. [2021-11-06 14:33:58,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-06 14:33:58,468 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:33:58,469 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 14:33:58,497 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 14:33:58,683 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,SelfDestructingSolverStorable10 [2021-11-06 14:33:58,684 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:33:58,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:33:58,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1857176193, now seen corresponding path program 1 times [2021-11-06 14:33:58,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:33:58,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219466935] [2021-11-06 14:33:58,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:58,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:33:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:33:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:33:58,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:33:58,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219466935] [2021-11-06 14:33:58,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219466935] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:33:58,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545262539] [2021-11-06 14:33:58,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:58,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:33:58,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:33:58,873 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:33:58,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-06 14:34:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:34:01,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 2192 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-06 14:34:01,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:34:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:34:01,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545262539] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:34:01,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:34:01,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [5] total 18 [2021-11-06 14:34:01,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503490327] [2021-11-06 14:34:01,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-06 14:34:01,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:34:01,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-06 14:34:01,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-11-06 14:34:01,463 INFO L87 Difference]: Start difference. First operand 20921 states and 29471 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 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)