./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--realtek--atp.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5f08f0f0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--realtek--atp.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 b615ef3e9ec848bbbdbcac9993fc5d609594ef1caaa279a862c4f038e6ec482e --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5f08f0f [2021-11-05 19:14:09,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-05 19:14:09,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-05 19:14:09,545 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-05 19:14:09,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-05 19:14:09,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-05 19:14:09,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-05 19:14:09,553 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-05 19:14:09,555 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-05 19:14:09,558 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-05 19:14:09,559 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-05 19:14:09,560 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-05 19:14:09,560 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-05 19:14:09,562 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-05 19:14:09,563 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-05 19:14:09,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-05 19:14:09,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-05 19:14:09,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-05 19:14:09,570 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-05 19:14:09,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-05 19:14:09,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-05 19:14:09,581 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-05 19:14:09,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-05 19:14:09,583 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-05 19:14:09,585 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-05 19:14:09,587 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-05 19:14:09,588 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-05 19:14:09,588 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-05 19:14:09,589 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-05 19:14:09,590 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-05 19:14:09,590 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-05 19:14:09,590 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-05 19:14:09,591 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-05 19:14:09,592 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-05 19:14:09,593 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-05 19:14:09,593 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-05 19:14:09,594 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-05 19:14:09,594 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-05 19:14:09,594 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-05 19:14:09,595 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-05 19:14:09,596 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-05 19:14:09,597 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-05 19:14:09,622 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-05 19:14:09,623 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-05 19:14:09,623 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-05 19:14:09,623 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-05 19:14:09,625 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-05 19:14:09,625 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-05 19:14:09,625 INFO L138 SettingsManager]: * Use SBE=true [2021-11-05 19:14:09,625 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-05 19:14:09,625 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-05 19:14:09,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-05 19:14:09,626 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-05 19:14:09,626 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-05 19:14:09,626 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-05 19:14:09,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-05 19:14:09,627 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-05 19:14:09,627 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-05 19:14:09,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-05 19:14:09,627 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-05 19:14:09,627 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-05 19:14:09,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-05 19:14:09,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-05 19:14:09,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-05 19:14:09,628 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-05 19:14:09,628 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-05 19:14:09,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-05 19:14:09,628 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-05 19:14:09,628 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-05 19:14:09,628 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-05 19:14:09,628 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-05 19:14:09,629 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b615ef3e9ec848bbbdbcac9993fc5d609594ef1caaa279a862c4f038e6ec482e [2021-11-05 19:14:09,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-05 19:14:09,907 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-05 19:14:09,909 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-05 19:14:09,910 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-05 19:14:09,911 INFO L275 PluginConnector]: CDTParser initialized [2021-11-05 19:14:09,912 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--realtek--atp.ko-entry_point.cil.out.i [2021-11-05 19:14:09,956 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33adcd172/6bbf1f457ccb49b79f7c74b78f23073d/FLAG3d0757acc [2021-11-05 19:14:10,508 INFO L306 CDTParser]: Found 1 translation units. [2021-11-05 19:14:10,509 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--realtek--atp.ko-entry_point.cil.out.i [2021-11-05 19:14:10,542 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33adcd172/6bbf1f457ccb49b79f7c74b78f23073d/FLAG3d0757acc [2021-11-05 19:14:10,722 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33adcd172/6bbf1f457ccb49b79f7c74b78f23073d [2021-11-05 19:14:10,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-05 19:14:10,726 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-05 19:14:10,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-05 19:14:10,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-05 19:14:10,730 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-05 19:14:10,730 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.11 07:14:10" (1/1) ... [2021-11-05 19:14:10,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6284af85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 07:14:10, skipping insertion in model container [2021-11-05 19:14:10,731 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.11 07:14:10" (1/1) ... [2021-11-05 19:14:10,736 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-05 19:14:10,824 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-05 19:14:11,668 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--realtek--atp.ko-entry_point.cil.out.i[208194,208207] [2021-11-05 19:14:11,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-05 19:14:11,734 INFO L203 MainTranslator]: Completed pre-run [2021-11-05 19:14:11,901 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--realtek--atp.ko-entry_point.cil.out.i[208194,208207] [2021-11-05 19:14:11,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-05 19:14:11,982 INFO L208 MainTranslator]: Completed translation [2021-11-05 19:14:11,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 07:14:11 WrapperNode [2021-11-05 19:14:11,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-05 19:14:11,985 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-05 19:14:11,985 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-05 19:14:11,985 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-05 19:14:11,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 07:14:11" (1/1) ... [2021-11-05 19:14:12,038 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 07:14:11" (1/1) ... [2021-11-05 19:14:12,975 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-05 19:14:12,976 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-05 19:14:12,977 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-05 19:14:12,977 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-05 19:14:12,983 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 07:14:11" (1/1) ... [2021-11-05 19:14:12,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 07:14:11" (1/1) ... [2021-11-05 19:14:13,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 07:14:11" (1/1) ... [2021-11-05 19:14:13,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 07:14:11" (1/1) ... [2021-11-05 19:14:13,318 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 07:14:11" (1/1) ... [2021-11-05 19:14:13,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 07:14:11" (1/1) ... [2021-11-05 19:14:13,443 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 07:14:11" (1/1) ... [2021-11-05 19:14:13,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-05 19:14:13,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-05 19:14:13,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-05 19:14:13,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-05 19:14:13,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 07:14:11" (1/1) ... [2021-11-05 19:14:13,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-05 19:14:13,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 19:14:13,578 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-05 19:14:13,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-05 19:14:13,607 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-05 19:14:13,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-05 19:14:13,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-05 19:14:13,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-05 19:14:13,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-05 19:14:13,608 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-05 19:14:13,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-05 19:14:13,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-05 19:14:13,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-05 19:14:13,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-05 19:14:13,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-05 19:14:18,912 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-05 19:14:18,912 INFO L299 CfgBuilder]: Removed 6842 assume(true) statements. [2021-11-05 19:14:18,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.11 07:14:18 BoogieIcfgContainer [2021-11-05 19:14:18,919 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-05 19:14:18,921 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-05 19:14:18,921 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-05 19:14:18,923 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-05 19:14:18,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.11 07:14:10" (1/3) ... [2021-11-05 19:14:18,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9337ff2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.11 07:14:18, skipping insertion in model container [2021-11-05 19:14:18,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 07:14:11" (2/3) ... [2021-11-05 19:14:18,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9337ff2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.11 07:14:18, skipping insertion in model container [2021-11-05 19:14:18,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.11 07:14:18" (3/3) ... [2021-11-05 19:14:18,926 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--realtek--atp.ko-entry_point.cil.out.i [2021-11-05 19:14:18,930 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-05 19:14:18,930 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-11-05 19:14:18,979 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-05 19:14:18,984 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-05 19:14:18,984 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-11-05 19:14:19,034 INFO L276 IsEmpty]: Start isEmpty. Operand has 3847 states, 3838 states have (on average 1.1357477853048463) internal successors, (4359), 3846 states have internal predecessors, (4359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:19,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-05 19:14:19,056 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 19:14:19,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 19:14:19,057 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-05 19:14:19,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 19:14:19,061 INFO L85 PathProgramCache]: Analyzing trace with hash 436413170, now seen corresponding path program 1 times [2021-11-05 19:14:19,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 19:14:19,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592068333] [2021-11-05 19:14:19,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 19:14:19,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 19:14:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 19:14:19,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 19:14:19,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 19:14:19,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592068333] [2021-11-05 19:14:19,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592068333] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 19:14:19,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 19:14:19,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-05 19:14:19,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75125733] [2021-11-05 19:14:19,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 19:14:19,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-05 19:14:19,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 19:14:19,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-05 19:14:19,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-05 19:14:19,435 INFO L87 Difference]: Start difference. First operand has 3847 states, 3838 states have (on average 1.1357477853048463) internal successors, (4359), 3846 states have internal predecessors, (4359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:19,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 19:14:19,584 INFO L93 Difference]: Finished difference Result 7690 states and 8713 transitions. [2021-11-05 19:14:19,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-05 19:14:19,586 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 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 85 [2021-11-05 19:14:19,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 19:14:19,612 INFO L225 Difference]: With dead ends: 7690 [2021-11-05 19:14:19,613 INFO L226 Difference]: Without dead ends: 3827 [2021-11-05 19:14:19,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.04ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-05 19:14:19,635 INFO L933 BasicCegarLoop]: 4337 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4337 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.32ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-05 19:14:19,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 4337 Invalid, 0 Unknown, 0 Unchecked, 11.32ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-05 19:14:19,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3827 states. [2021-11-05 19:14:19,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3827 to 3827. [2021-11-05 19:14:19,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3827 states, 3819 states have (on average 1.1277821419219691) internal successors, (4307), 3826 states have internal predecessors, (4307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:19,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 4307 transitions. [2021-11-05 19:14:19,765 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 4307 transitions. Word has length 85 [2021-11-05 19:14:19,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 19:14:19,765 INFO L470 AbstractCegarLoop]: Abstraction has 3827 states and 4307 transitions. [2021-11-05 19:14:19,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:19,766 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 4307 transitions. [2021-11-05 19:14:19,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-05 19:14:19,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 19:14:19,772 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 19:14:19,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-05 19:14:19,773 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-05 19:14:19,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 19:14:19,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1452762514, now seen corresponding path program 1 times [2021-11-05 19:14:19,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 19:14:19,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074327012] [2021-11-05 19:14:19,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 19:14:19,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 19:14:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 19:14:19,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 19:14:19,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 19:14:19,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074327012] [2021-11-05 19:14:19,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074327012] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 19:14:19,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 19:14:19,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 19:14:19,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433043873] [2021-11-05 19:14:19,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 19:14:19,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 19:14:19,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 19:14:19,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 19:14:19,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 19:14:19,943 INFO L87 Difference]: Start difference. First operand 3827 states and 4307 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:20,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 19:14:20,300 INFO L93 Difference]: Finished difference Result 12718 states and 14353 transitions. [2021-11-05 19:14:20,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 19:14:20,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 states have internal predecessors, (85), 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 85 [2021-11-05 19:14:20,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 19:14:20,327 INFO L225 Difference]: With dead ends: 12718 [2021-11-05 19:14:20,327 INFO L226 Difference]: Without dead ends: 8905 [2021-11-05 19:14:20,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.40ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 19:14:20,338 INFO L933 BasicCegarLoop]: 6519 mSDtfsCounter, 4637 mSDsluCounter, 8637 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4637 SdHoareTripleChecker+Valid, 15156 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.69ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 91.90ms IncrementalHoareTripleChecker+Time [2021-11-05 19:14:20,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4637 Valid, 15156 Invalid, 68 Unknown, 0 Unchecked, 24.69ms Time], IncrementalHoareTripleChecker [11 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 91.90ms Time] [2021-11-05 19:14:20,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8905 states. [2021-11-05 19:14:20,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8905 to 4806. [2021-11-05 19:14:20,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4806 states, 4798 states have (on average 1.1304710295956648) internal successors, (5424), 4805 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:20,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4806 states to 4806 states and 5424 transitions. [2021-11-05 19:14:20,481 INFO L78 Accepts]: Start accepts. Automaton has 4806 states and 5424 transitions. Word has length 85 [2021-11-05 19:14:20,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 19:14:20,481 INFO L470 AbstractCegarLoop]: Abstraction has 4806 states and 5424 transitions. [2021-11-05 19:14:20,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:20,482 INFO L276 IsEmpty]: Start isEmpty. Operand 4806 states and 5424 transitions. [2021-11-05 19:14:20,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-05 19:14:20,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 19:14:20,487 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 19:14:20,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-05 19:14:20,488 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-05 19:14:20,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 19:14:20,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1938859404, now seen corresponding path program 1 times [2021-11-05 19:14:20,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 19:14:20,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287130156] [2021-11-05 19:14:20,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 19:14:20,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 19:14:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 19:14:20,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 19:14:20,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 19:14:20,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287130156] [2021-11-05 19:14:20,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287130156] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 19:14:20,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 19:14:20,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 19:14:20,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237646929] [2021-11-05 19:14:20,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 19:14:20,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 19:14:20,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 19:14:20,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 19:14:20,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 19:14:20,605 INFO L87 Difference]: Start difference. First operand 4806 states and 5424 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:21,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 19:14:21,081 INFO L93 Difference]: Finished difference Result 17613 states and 19940 transitions. [2021-11-05 19:14:21,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 19:14:21,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 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 86 [2021-11-05 19:14:21,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 19:14:21,127 INFO L225 Difference]: With dead ends: 17613 [2021-11-05 19:14:21,128 INFO L226 Difference]: Without dead ends: 12821 [2021-11-05 19:14:21,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.03ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 19:14:21,141 INFO L933 BasicCegarLoop]: 5412 mSDtfsCounter, 5751 mSDsluCounter, 8560 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5751 SdHoareTripleChecker+Valid, 13972 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.36ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.50ms IncrementalHoareTripleChecker+Time [2021-11-05 19:14:21,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5751 Valid, 13972 Invalid, 60 Unknown, 0 Unchecked, 19.36ms Time], IncrementalHoareTripleChecker [13 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 61.50ms Time] [2021-11-05 19:14:21,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12821 states. [2021-11-05 19:14:21,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12821 to 8879. [2021-11-05 19:14:21,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8879 states, 8871 states have (on average 1.1307631608612332) internal successors, (10031), 8878 states have internal predecessors, (10031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:21,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8879 states to 8879 states and 10031 transitions. [2021-11-05 19:14:21,415 INFO L78 Accepts]: Start accepts. Automaton has 8879 states and 10031 transitions. Word has length 86 [2021-11-05 19:14:21,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 19:14:21,416 INFO L470 AbstractCegarLoop]: Abstraction has 8879 states and 10031 transitions. [2021-11-05 19:14:21,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:21,416 INFO L276 IsEmpty]: Start isEmpty. Operand 8879 states and 10031 transitions. [2021-11-05 19:14:21,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-05 19:14:21,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 19:14:21,423 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 19:14:21,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-05 19:14:21,423 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-05 19:14:21,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 19:14:21,424 INFO L85 PathProgramCache]: Analyzing trace with hash 390862694, now seen corresponding path program 1 times [2021-11-05 19:14:21,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 19:14:21,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267606510] [2021-11-05 19:14:21,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 19:14:21,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 19:14:21,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 19:14:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 19:14:21,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 19:14:21,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267606510] [2021-11-05 19:14:21,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267606510] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 19:14:21,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 19:14:21,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 19:14:21,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678716111] [2021-11-05 19:14:21,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 19:14:21,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 19:14:21,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 19:14:21,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 19:14:21,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 19:14:21,496 INFO L87 Difference]: Start difference. First operand 8879 states and 10031 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:22,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 19:14:22,135 INFO L93 Difference]: Finished difference Result 33057 states and 37455 transitions. [2021-11-05 19:14:22,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 19:14:22,136 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 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 87 [2021-11-05 19:14:22,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 19:14:22,194 INFO L225 Difference]: With dead ends: 33057 [2021-11-05 19:14:22,194 INFO L226 Difference]: Without dead ends: 24192 [2021-11-05 19:14:22,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.36ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 19:14:22,217 INFO L933 BasicCegarLoop]: 5411 mSDtfsCounter, 5757 mSDsluCounter, 8560 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5757 SdHoareTripleChecker+Valid, 13971 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.65ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.84ms IncrementalHoareTripleChecker+Time [2021-11-05 19:14:22,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5757 Valid, 13971 Invalid, 60 Unknown, 0 Unchecked, 20.65ms Time], IncrementalHoareTripleChecker [13 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 50.84ms Time] [2021-11-05 19:14:22,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24192 states. [2021-11-05 19:14:22,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24192 to 16325. [2021-11-05 19:14:22,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16325 states, 16317 states have (on average 1.1312128454985597) internal successors, (18458), 16324 states have internal predecessors, (18458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:22,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16325 states to 16325 states and 18458 transitions. [2021-11-05 19:14:22,652 INFO L78 Accepts]: Start accepts. Automaton has 16325 states and 18458 transitions. Word has length 87 [2021-11-05 19:14:22,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 19:14:22,653 INFO L470 AbstractCegarLoop]: Abstraction has 16325 states and 18458 transitions. [2021-11-05 19:14:22,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:22,653 INFO L276 IsEmpty]: Start isEmpty. Operand 16325 states and 18458 transitions. [2021-11-05 19:14:22,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-05 19:14:22,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 19:14:22,663 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 19:14:22,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-05 19:14:22,664 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-05 19:14:22,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 19:14:22,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1184389102, now seen corresponding path program 1 times [2021-11-05 19:14:22,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 19:14:22,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41273340] [2021-11-05 19:14:22,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 19:14:22,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 19:14:22,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 19:14:22,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 19:14:22,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 19:14:22,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41273340] [2021-11-05 19:14:22,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41273340] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 19:14:22,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 19:14:22,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 19:14:22,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823557311] [2021-11-05 19:14:22,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 19:14:22,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 19:14:22,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 19:14:22,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 19:14:22,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 19:14:22,778 INFO L87 Difference]: Start difference. First operand 16325 states and 18458 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:24,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 19:14:24,012 INFO L93 Difference]: Finished difference Result 61841 states and 70116 transitions. [2021-11-05 19:14:24,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 19:14:24,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-05 19:14:24,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 19:14:24,104 INFO L225 Difference]: With dead ends: 61841 [2021-11-05 19:14:24,105 INFO L226 Difference]: Without dead ends: 45530 [2021-11-05 19:14:24,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.55ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 19:14:24,137 INFO L933 BasicCegarLoop]: 5410 mSDtfsCounter, 5763 mSDsluCounter, 8560 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5763 SdHoareTripleChecker+Valid, 13970 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.14ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.50ms IncrementalHoareTripleChecker+Time [2021-11-05 19:14:24,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5763 Valid, 13970 Invalid, 60 Unknown, 0 Unchecked, 22.14ms Time], IncrementalHoareTripleChecker [13 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 47.50ms Time] [2021-11-05 19:14:24,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45530 states. [2021-11-05 19:14:25,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45530 to 29816. [2021-11-05 19:14:25,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29816 states, 29808 states have (on average 1.1317767042404723) internal successors, (33736), 29815 states have internal predecessors, (33736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:25,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29816 states to 29816 states and 33736 transitions. [2021-11-05 19:14:25,140 INFO L78 Accepts]: Start accepts. Automaton has 29816 states and 33736 transitions. Word has length 88 [2021-11-05 19:14:25,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 19:14:25,140 INFO L470 AbstractCegarLoop]: Abstraction has 29816 states and 33736 transitions. [2021-11-05 19:14:25,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:25,141 INFO L276 IsEmpty]: Start isEmpty. Operand 29816 states and 33736 transitions. [2021-11-05 19:14:25,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-05 19:14:25,150 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 19:14:25,150 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 19:14:25,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-05 19:14:25,151 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-05 19:14:25,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 19:14:25,152 INFO L85 PathProgramCache]: Analyzing trace with hash -490209564, now seen corresponding path program 1 times [2021-11-05 19:14:25,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 19:14:25,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321621857] [2021-11-05 19:14:25,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 19:14:25,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 19:14:25,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 19:14:25,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-05 19:14:25,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 19:14:25,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321621857] [2021-11-05 19:14:25,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321621857] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 19:14:25,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 19:14:25,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 19:14:25,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960194160] [2021-11-05 19:14:25,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 19:14:25,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-05 19:14:25,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 19:14:25,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-05 19:14:25,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-05 19:14:25,260 INFO L87 Difference]: Start difference. First operand 29816 states and 33736 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:26,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 19:14:26,940 INFO L93 Difference]: Finished difference Result 91688 states and 103876 transitions. [2021-11-05 19:14:26,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-05 19:14:26,941 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-05 19:14:26,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 19:14:27,096 INFO L225 Difference]: With dead ends: 91688 [2021-11-05 19:14:27,097 INFO L226 Difference]: Without dead ends: 61886 [2021-11-05 19:14:27,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.94ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-05 19:14:27,176 INFO L933 BasicCegarLoop]: 7783 mSDtfsCounter, 7972 mSDsluCounter, 18691 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7972 SdHoareTripleChecker+Valid, 26474 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.30ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 91.42ms IncrementalHoareTripleChecker+Time [2021-11-05 19:14:27,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7972 Valid, 26474 Invalid, 143 Unknown, 0 Unchecked, 22.30ms Time], IncrementalHoareTripleChecker [32 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 91.42ms Time] [2021-11-05 19:14:27,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61886 states. [2021-11-05 19:14:28,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61886 to 29856. [2021-11-05 19:14:28,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29856 states, 29848 states have (on average 1.1316001072098634) internal successors, (33776), 29855 states have internal predecessors, (33776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:28,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29856 states to 29856 states and 33776 transitions. [2021-11-05 19:14:28,372 INFO L78 Accepts]: Start accepts. Automaton has 29856 states and 33776 transitions. Word has length 92 [2021-11-05 19:14:28,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 19:14:28,372 INFO L470 AbstractCegarLoop]: Abstraction has 29856 states and 33776 transitions. [2021-11-05 19:14:28,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:28,372 INFO L276 IsEmpty]: Start isEmpty. Operand 29856 states and 33776 transitions. [2021-11-05 19:14:28,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-05 19:14:28,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 19:14:28,380 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 19:14:28,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-05 19:14:28,381 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-05 19:14:28,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 19:14:28,382 INFO L85 PathProgramCache]: Analyzing trace with hash -2132119318, now seen corresponding path program 1 times [2021-11-05 19:14:28,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 19:14:28,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771094731] [2021-11-05 19:14:28,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 19:14:28,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 19:14:28,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 19:14:28,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 19:14:28,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 19:14:28,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771094731] [2021-11-05 19:14:28,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771094731] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 19:14:28,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 19:14:28,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 19:14:28,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93775482] [2021-11-05 19:14:28,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 19:14:28,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 19:14:28,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 19:14:28,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 19:14:28,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 19:14:28,462 INFO L87 Difference]: Start difference. First operand 29856 states and 33776 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:29,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 19:14:29,857 INFO L93 Difference]: Finished difference Result 81174 states and 91829 transitions. [2021-11-05 19:14:29,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 19:14:29,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 108 [2021-11-05 19:14:29,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 19:14:29,970 INFO L225 Difference]: With dead ends: 81174 [2021-11-05 19:14:29,971 INFO L226 Difference]: Without dead ends: 51332 [2021-11-05 19:14:30,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.07ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 19:14:30,039 INFO L933 BasicCegarLoop]: 7462 mSDtfsCounter, 3701 mSDsluCounter, 4227 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3701 SdHoareTripleChecker+Valid, 11689 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.71ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.83ms IncrementalHoareTripleChecker+Time [2021-11-05 19:14:30,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3701 Valid, 11689 Invalid, 65 Unknown, 0 Unchecked, 8.71ms Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 62.83ms Time] [2021-11-05 19:14:30,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51332 states. [2021-11-05 19:14:31,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51332 to 47060. [2021-11-05 19:14:31,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47060 states, 47052 states have (on average 1.135679673552665) internal successors, (53436), 47059 states have internal predecessors, (53436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:31,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47060 states to 47060 states and 53436 transitions. [2021-11-05 19:14:31,619 INFO L78 Accepts]: Start accepts. Automaton has 47060 states and 53436 transitions. Word has length 108 [2021-11-05 19:14:31,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 19:14:31,619 INFO L470 AbstractCegarLoop]: Abstraction has 47060 states and 53436 transitions. [2021-11-05 19:14:31,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:31,620 INFO L276 IsEmpty]: Start isEmpty. Operand 47060 states and 53436 transitions. [2021-11-05 19:14:31,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-11-05 19:14:31,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 19:14:31,630 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 19:14:31,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-05 19:14:31,631 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-05 19:14:31,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 19:14:31,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1870052933, now seen corresponding path program 1 times [2021-11-05 19:14:31,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 19:14:31,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775122428] [2021-11-05 19:14:31,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 19:14:31,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 19:14:31,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 19:14:31,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 19:14:31,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 19:14:31,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775122428] [2021-11-05 19:14:31,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775122428] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 19:14:31,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 19:14:31,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 19:14:31,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25975796] [2021-11-05 19:14:31,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 19:14:31,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 19:14:31,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 19:14:31,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 19:14:31,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 19:14:31,892 INFO L87 Difference]: Start difference. First operand 47060 states and 53436 transitions. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:33,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 19:14:33,186 INFO L93 Difference]: Finished difference Result 95514 states and 108521 transitions. [2021-11-05 19:14:33,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 19:14:33,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 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 237 [2021-11-05 19:14:33,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 19:14:33,264 INFO L225 Difference]: With dead ends: 95514 [2021-11-05 19:14:33,265 INFO L226 Difference]: Without dead ends: 48468 [2021-11-05 19:14:33,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.30ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 19:14:33,323 INFO L933 BasicCegarLoop]: 4283 mSDtfsCounter, 36 mSDsluCounter, 4265 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 8548 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.86ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.90ms IncrementalHoareTripleChecker+Time [2021-11-05 19:14:33,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 8548 Invalid, 72 Unknown, 0 Unchecked, 5.86ms Time], IncrementalHoareTripleChecker [14 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 52.90ms Time] [2021-11-05 19:14:33,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48468 states. [2021-11-05 19:14:34,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48468 to 47316. [2021-11-05 19:14:34,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47316 states, 47308 states have (on average 1.1349454637693412) internal successors, (53692), 47315 states have internal predecessors, (53692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:34,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47316 states to 47316 states and 53692 transitions. [2021-11-05 19:14:34,954 INFO L78 Accepts]: Start accepts. Automaton has 47316 states and 53692 transitions. Word has length 237 [2021-11-05 19:14:34,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 19:14:34,957 INFO L470 AbstractCegarLoop]: Abstraction has 47316 states and 53692 transitions. [2021-11-05 19:14:34,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:34,958 INFO L276 IsEmpty]: Start isEmpty. Operand 47316 states and 53692 transitions. [2021-11-05 19:14:34,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-05 19:14:34,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 19:14:34,986 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 19:14:34,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-05 19:14:34,989 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-05 19:14:34,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 19:14:34,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1525441174, now seen corresponding path program 1 times [2021-11-05 19:14:34,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 19:14:34,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123182961] [2021-11-05 19:14:34,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 19:14:34,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 19:14:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 19:14:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 19:14:35,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 19:14:35,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123182961] [2021-11-05 19:14:35,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123182961] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 19:14:35,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373044605] [2021-11-05 19:14:35,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 19:14:35,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 19:14:35,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 19:14:35,097 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) [2021-11-05 19:14:35,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-05 19:14:35,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 19:14:35,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 2821 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-05 19:14:35,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 19:14:36,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 19:14:36,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 19:14:36,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373044605] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 19:14:36,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-05 19:14:36,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-05 19:14:36,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439371082] [2021-11-05 19:14:36,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 19:14:36,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 19:14:36,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 19:14:36,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 19:14:36,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-05 19:14:36,057 INFO L87 Difference]: Start difference. First operand 47316 states and 53692 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:37,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 19:14:37,528 INFO L93 Difference]: Finished difference Result 95738 states and 108585 transitions. [2021-11-05 19:14:37,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 19:14:37,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 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 240 [2021-11-05 19:14:37,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 19:14:37,615 INFO L225 Difference]: With dead ends: 95738 [2021-11-05 19:14:37,616 INFO L226 Difference]: Without dead ends: 48436 [2021-11-05 19:14:37,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 6.34ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-05 19:14:37,673 INFO L933 BasicCegarLoop]: 4301 mSDtfsCounter, 72 mSDsluCounter, 4295 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 8596 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.76ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.11ms IncrementalHoareTripleChecker+Time [2021-11-05 19:14:37,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 8596 Invalid, 18 Unknown, 0 Unchecked, 5.76ms Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 16.11ms Time] [2021-11-05 19:14:37,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48436 states. [2021-11-05 19:14:39,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48436 to 47348. [2021-11-05 19:14:39,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47348 states, 47340 states have (on average 1.134854245880862) internal successors, (53724), 47347 states have internal predecessors, (53724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:39,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47348 states to 47348 states and 53724 transitions. [2021-11-05 19:14:39,162 INFO L78 Accepts]: Start accepts. Automaton has 47348 states and 53724 transitions. Word has length 240 [2021-11-05 19:14:39,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 19:14:39,163 INFO L470 AbstractCegarLoop]: Abstraction has 47348 states and 53724 transitions. [2021-11-05 19:14:39,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:39,163 INFO L276 IsEmpty]: Start isEmpty. Operand 47348 states and 53724 transitions. [2021-11-05 19:14:39,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-05 19:14:39,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 19:14:39,173 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 19:14:39,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-05 19:14:39,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 19:14:39,396 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-05 19:14:39,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 19:14:39,396 INFO L85 PathProgramCache]: Analyzing trace with hash 708218715, now seen corresponding path program 1 times [2021-11-05 19:14:39,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 19:14:39,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654970928] [2021-11-05 19:14:39,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 19:14:39,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 19:14:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 19:14:39,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 19:14:39,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 19:14:39,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654970928] [2021-11-05 19:14:39,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654970928] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 19:14:39,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176657662] [2021-11-05 19:14:39,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 19:14:39,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 19:14:39,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 19:14:39,494 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) [2021-11-05 19:14:39,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-05 19:14:40,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 19:14:40,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 2920 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-05 19:14:40,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 19:14:40,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 19:14:40,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 19:14:40,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176657662] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 19:14:40,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-05 19:14:40,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-05 19:14:40,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794415180] [2021-11-05 19:14:40,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 19:14:40,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 19:14:40,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 19:14:40,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 19:14:40,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-05 19:14:40,674 INFO L87 Difference]: Start difference. First operand 47348 states and 53724 transitions. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:42,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 19:14:42,571 INFO L93 Difference]: Finished difference Result 116814 states and 132845 transitions. [2021-11-05 19:14:42,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 19:14:42,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 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 253 [2021-11-05 19:14:42,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 19:14:42,706 INFO L225 Difference]: With dead ends: 116814 [2021-11-05 19:14:42,706 INFO L226 Difference]: Without dead ends: 69480 [2021-11-05 19:14:42,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 6.22ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-05 19:14:42,756 INFO L933 BasicCegarLoop]: 7437 mSDtfsCounter, 3837 mSDsluCounter, 4120 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3837 SdHoareTripleChecker+Valid, 11557 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.59ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 69.57ms IncrementalHoareTripleChecker+Time [2021-11-05 19:14:42,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3837 Valid, 11557 Invalid, 104 Unknown, 0 Unchecked, 9.59ms Time], IncrementalHoareTripleChecker [30 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 69.57ms Time] [2021-11-05 19:14:42,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69480 states. [2021-11-05 19:14:44,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69480 to 65176. [2021-11-05 19:14:44,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65176 states, 65168 states have (on average 1.1395777068499877) internal successors, (74264), 65175 states have internal predecessors, (74264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:44,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65176 states to 65176 states and 74264 transitions. [2021-11-05 19:14:44,837 INFO L78 Accepts]: Start accepts. Automaton has 65176 states and 74264 transitions. Word has length 253 [2021-11-05 19:14:44,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 19:14:44,838 INFO L470 AbstractCegarLoop]: Abstraction has 65176 states and 74264 transitions. [2021-11-05 19:14:44,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:44,838 INFO L276 IsEmpty]: Start isEmpty. Operand 65176 states and 74264 transitions. [2021-11-05 19:14:44,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-11-05 19:14:44,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 19:14:44,850 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 19:14:44,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-05 19:14:45,072 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,SelfDestructingSolverStorable9 [2021-11-05 19:14:45,073 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-05 19:14:45,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 19:14:45,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1010432159, now seen corresponding path program 1 times [2021-11-05 19:14:45,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 19:14:45,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429124747] [2021-11-05 19:14:45,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 19:14:45,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 19:14:45,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 19:14:45,199 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-05 19:14:45,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 19:14:45,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429124747] [2021-11-05 19:14:45,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429124747] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 19:14:45,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752380333] [2021-11-05 19:14:45,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 19:14:45,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 19:14:45,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 19:14:45,216 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) [2021-11-05 19:14:45,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-05 19:14:45,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 19:14:45,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 2967 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-05 19:14:45,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 19:14:46,237 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-05 19:14:46,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 19:14:46,698 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-05 19:14:46,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752380333] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 19:14:46,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-05 19:14:46,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-05 19:14:46,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591171380] [2021-11-05 19:14:46,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-05 19:14:46,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-05 19:14:46,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 19:14:46,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-05 19:14:46,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-05 19:14:46,701 INFO L87 Difference]: Start difference. First operand 65176 states and 74264 transitions. Second operand has 7 states, 7 states have (on average 38.42857142857143) internal successors, (269), 7 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:49,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 19:14:49,233 INFO L93 Difference]: Finished difference Result 138018 states and 157345 transitions. [2021-11-05 19:14:49,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-05 19:14:49,234 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 38.42857142857143) internal successors, (269), 7 states have internal predecessors, (269), 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 270 [2021-11-05 19:14:49,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 19:14:49,380 INFO L225 Difference]: With dead ends: 138018 [2021-11-05 19:14:49,380 INFO L226 Difference]: Without dead ends: 72856 [2021-11-05 19:14:49,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 12.43ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-05 19:14:49,482 INFO L933 BasicCegarLoop]: 4283 mSDtfsCounter, 284 mSDsluCounter, 4345 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 267.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 8628 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.57ms SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 296.76ms IncrementalHoareTripleChecker+Time [2021-11-05 19:14:49,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 8628 Invalid, 231 Unknown, 0 Unchecked, 7.57ms Time], IncrementalHoareTripleChecker [85 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 296.76ms Time] [2021-11-05 19:14:49,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72856 states. [2021-11-05 19:14:51,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72856 to 71512. [2021-11-05 19:14:51,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71512 states, 71504 states have (on average 1.1272096665920788) internal successors, (80600), 71511 states have internal predecessors, (80600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:51,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71512 states to 71512 states and 80600 transitions. [2021-11-05 19:14:51,752 INFO L78 Accepts]: Start accepts. Automaton has 71512 states and 80600 transitions. Word has length 270 [2021-11-05 19:14:51,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 19:14:51,754 INFO L470 AbstractCegarLoop]: Abstraction has 71512 states and 80600 transitions. [2021-11-05 19:14:51,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 38.42857142857143) internal successors, (269), 7 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 19:14:51,754 INFO L276 IsEmpty]: Start isEmpty. Operand 71512 states and 80600 transitions. [2021-11-05 19:14:51,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-05 19:14:51,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 19:14:51,768 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 19:14:51,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-05 19:14:51,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 19:14:51,983 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-05 19:14:51,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 19:14:51,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1582728398, now seen corresponding path program 2 times [2021-11-05 19:14:51,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 19:14:51,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294287029] [2021-11-05 19:14:51,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 19:14:51,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 19:14:52,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 19:14:52,158 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-05 19:14:52,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 19:14:52,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294287029] [2021-11-05 19:14:52,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294287029] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 19:14:52,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 19:14:52,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 19:14:52,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096137043] [2021-11-05 19:14:52,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 19:14:52,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 19:14:52,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 19:14:52,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 19:14:52,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-05 19:14:52,160 INFO L87 Difference]: Start difference. First operand 71512 states and 80600 transitions. Second operand has 4 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 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)