./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem11_label54.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/eca-rers2012/Problem11_label54.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-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 32bit --witnessprinter.graph.data.programhash edb6f856db72a43ad08c83ff0e1ee56d288f58300ccdf5a7b1b400a926b63cbe --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 22:39:14,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 22:39:14,609 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 22:39:14,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 22:39:14,681 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 22:39:14,684 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 22:39:14,686 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 22:39:14,691 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 22:39:14,693 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 22:39:14,697 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 22:39:14,698 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 22:39:14,699 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 22:39:14,699 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 22:39:14,705 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 22:39:14,707 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 22:39:14,710 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 22:39:14,711 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 22:39:14,712 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 22:39:14,714 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 22:39:14,720 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 22:39:14,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 22:39:14,722 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 22:39:14,724 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 22:39:14,725 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 22:39:14,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 22:39:14,731 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 22:39:14,731 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 22:39:14,733 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 22:39:14,733 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 22:39:14,734 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 22:39:14,734 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 22:39:14,735 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 22:39:14,737 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 22:39:14,738 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 22:39:14,739 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 22:39:14,739 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 22:39:14,740 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 22:39:14,740 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 22:39:14,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 22:39:14,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 22:39:14,742 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 22:39:14,744 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 22:39:14,783 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 22:39:14,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 22:39:14,784 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 22:39:14,785 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 22:39:14,786 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 22:39:14,786 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 22:39:14,787 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 22:39:14,787 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 22:39:14,787 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 22:39:14,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 22:39:14,788 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 22:39:14,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 22:39:14,788 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 22:39:14,789 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 22:39:14,789 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 22:39:14,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 22:39:14,789 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 22:39:14,789 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 22:39:14,790 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 22:39:14,790 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 22:39:14,790 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 22:39:14,790 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 22:39:14,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 22:39:14,791 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 22:39:14,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:39:14,791 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 22:39:14,791 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 22:39:14,791 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 22:39:14,792 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 22:39:14,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 22:39:14,792 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 22:39:14,792 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 22:39:14,793 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 22:39:14,793 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 22:39:14,793 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> edb6f856db72a43ad08c83ff0e1ee56d288f58300ccdf5a7b1b400a926b63cbe [2021-12-15 22:39:15,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 22:39:15,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 22:39:15,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 22:39:15,076 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 22:39:15,077 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 22:39:15,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem11_label54.c [2021-12-15 22:39:15,145 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0faf0eb6f/35981784c8a740ac9edfec9eb8540262/FLAG4b16946c3 [2021-12-15 22:39:15,692 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 22:39:15,692 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem11_label54.c [2021-12-15 22:39:15,704 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0faf0eb6f/35981784c8a740ac9edfec9eb8540262/FLAG4b16946c3 [2021-12-15 22:39:16,166 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0faf0eb6f/35981784c8a740ac9edfec9eb8540262 [2021-12-15 22:39:16,169 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 22:39:16,170 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 22:39:16,171 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 22:39:16,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 22:39:16,174 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 22:39:16,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:39:16" (1/1) ... [2021-12-15 22:39:16,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@562287d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:39:16, skipping insertion in model container [2021-12-15 22:39:16,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:39:16" (1/1) ... [2021-12-15 22:39:16,181 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 22:39:16,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 22:39:16,449 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem11_label54.c[5423,5436] [2021-12-15 22:39:16,634 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:39:16,639 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 22:39:16,654 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem11_label54.c[5423,5436] [2021-12-15 22:39:16,758 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:39:16,771 INFO L208 MainTranslator]: Completed translation [2021-12-15 22:39:16,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:39:16 WrapperNode [2021-12-15 22:39:16,771 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 22:39:16,772 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 22:39:16,772 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 22:39:16,772 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 22:39:16,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:39:16" (1/1) ... [2021-12-15 22:39:16,802 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:39:16" (1/1) ... [2021-12-15 22:39:16,921 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 999 [2021-12-15 22:39:16,921 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 22:39:16,922 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 22:39:16,922 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 22:39:16,923 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 22:39:16,929 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:39:16" (1/1) ... [2021-12-15 22:39:16,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:39:16" (1/1) ... [2021-12-15 22:39:16,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:39:16" (1/1) ... [2021-12-15 22:39:16,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:39:16" (1/1) ... [2021-12-15 22:39:16,992 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:39:16" (1/1) ... [2021-12-15 22:39:17,015 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:39:16" (1/1) ... [2021-12-15 22:39:17,023 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:39:16" (1/1) ... [2021-12-15 22:39:17,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 22:39:17,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 22:39:17,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 22:39:17,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 22:39:17,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:39:16" (1/1) ... [2021-12-15 22:39:17,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:39:17,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:39:17,069 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) [2021-12-15 22:39:17,089 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 [2021-12-15 22:39:17,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 22:39:17,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 22:39:17,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 22:39:17,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 22:39:17,171 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 22:39:17,172 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 22:39:18,469 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 22:39:18,483 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 22:39:18,483 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 22:39:18,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:39:18 BoogieIcfgContainer [2021-12-15 22:39:18,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 22:39:18,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 22:39:18,489 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 22:39:18,492 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 22:39:18,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:39:16" (1/3) ... [2021-12-15 22:39:18,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@98ed8b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:39:18, skipping insertion in model container [2021-12-15 22:39:18,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:39:16" (2/3) ... [2021-12-15 22:39:18,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@98ed8b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:39:18, skipping insertion in model container [2021-12-15 22:39:18,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:39:18" (3/3) ... [2021-12-15 22:39:18,496 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11_label54.c [2021-12-15 22:39:18,502 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 22:39:18,502 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 22:39:18,557 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 22:39:18,564 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 [2021-12-15 22:39:18,564 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 22:39:18,594 INFO L276 IsEmpty]: Start isEmpty. Operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 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) [2021-12-15 22:39:18,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-15 22:39:18,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:39:18,604 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] [2021-12-15 22:39:18,605 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:39:18,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:39:18,610 INFO L85 PathProgramCache]: Analyzing trace with hash 2088660649, now seen corresponding path program 1 times [2021-12-15 22:39:18,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:39:18,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140085249] [2021-12-15 22:39:18,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:39:18,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:39:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:39:18,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:39:18,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:39:18,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140085249] [2021-12-15 22:39:18,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140085249] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:39:18,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:39:18,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:39:18,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071624667] [2021-12-15 22:39:18,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:39:18,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:39:18,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:39:18,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:39:18,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:18,887 INFO L87 Difference]: Start difference. First operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 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) [2021-12-15 22:39:19,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:39:19,909 INFO L93 Difference]: Finished difference Result 763 states and 1352 transitions. [2021-12-15 22:39:19,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:39:19,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 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 37 [2021-12-15 22:39:19,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:39:19,929 INFO L225 Difference]: With dead ends: 763 [2021-12-15 22:39:19,929 INFO L226 Difference]: Without dead ends: 416 [2021-12-15 22:39:19,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:19,946 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 236 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:39:19,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 89 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 22:39:19,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-12-15 22:39:19,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 408. [2021-12-15 22:39:20,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 1.6142506142506143) internal successors, (657), 407 states have internal predecessors, (657), 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) [2021-12-15 22:39:20,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 657 transitions. [2021-12-15 22:39:20,003 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 657 transitions. Word has length 37 [2021-12-15 22:39:20,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:39:20,004 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 657 transitions. [2021-12-15 22:39:20,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 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) [2021-12-15 22:39:20,005 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 657 transitions. [2021-12-15 22:39:20,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-15 22:39:20,007 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:39:20,008 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:39:20,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 22:39:20,008 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:39:20,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:39:20,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1296179654, now seen corresponding path program 1 times [2021-12-15 22:39:20,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:39:20,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111747274] [2021-12-15 22:39:20,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:39:20,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:39:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:39:20,125 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:39:20,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:39:20,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111747274] [2021-12-15 22:39:20,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111747274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:39:20,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:39:20,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:39:20,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215391896] [2021-12-15 22:39:20,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:39:20,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:39:20,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:39:20,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:39:20,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:20,129 INFO L87 Difference]: Start difference. First operand 408 states and 657 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:39:20,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:39:20,873 INFO L93 Difference]: Finished difference Result 1191 states and 1927 transitions. [2021-12-15 22:39:20,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:39:20,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-12-15 22:39:20,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:39:20,878 INFO L225 Difference]: With dead ends: 1191 [2021-12-15 22:39:20,878 INFO L226 Difference]: Without dead ends: 785 [2021-12-15 22:39:20,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:20,880 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 157 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:39:20,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 156 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:39:20,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2021-12-15 22:39:20,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 601. [2021-12-15 22:39:20,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 600 states have (on average 1.5) internal successors, (900), 600 states have internal predecessors, (900), 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) [2021-12-15 22:39:20,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 900 transitions. [2021-12-15 22:39:20,915 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 900 transitions. Word has length 102 [2021-12-15 22:39:20,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:39:20,916 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 900 transitions. [2021-12-15 22:39:20,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:39:20,917 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 900 transitions. [2021-12-15 22:39:20,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-15 22:39:20,919 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:39:20,920 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:39:20,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 22:39:20,920 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:39:20,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:39:20,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1017074320, now seen corresponding path program 1 times [2021-12-15 22:39:20,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:39:20,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509514220] [2021-12-15 22:39:20,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:39:20,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:39:20,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:39:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:39:20,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:39:20,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509514220] [2021-12-15 22:39:20,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509514220] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:39:20,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:39:20,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:39:20,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692589758] [2021-12-15 22:39:20,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:39:20,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:39:20,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:39:20,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:39:20,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:20,999 INFO L87 Difference]: Start difference. First operand 601 states and 900 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 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) [2021-12-15 22:39:21,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:39:21,718 INFO L93 Difference]: Finished difference Result 1582 states and 2353 transitions. [2021-12-15 22:39:21,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:39:21,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 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 105 [2021-12-15 22:39:21,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:39:21,722 INFO L225 Difference]: With dead ends: 1582 [2021-12-15 22:39:21,723 INFO L226 Difference]: Without dead ends: 983 [2021-12-15 22:39:21,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:21,725 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 144 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:39:21,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 115 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:39:21,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-12-15 22:39:21,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 972. [2021-12-15 22:39:21,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 1.3707518022657055) internal successors, (1331), 971 states have internal predecessors, (1331), 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) [2021-12-15 22:39:21,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1331 transitions. [2021-12-15 22:39:21,753 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1331 transitions. Word has length 105 [2021-12-15 22:39:21,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:39:21,753 INFO L470 AbstractCegarLoop]: Abstraction has 972 states and 1331 transitions. [2021-12-15 22:39:21,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 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) [2021-12-15 22:39:21,754 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1331 transitions. [2021-12-15 22:39:21,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-15 22:39:21,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:39:21,756 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:39:21,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 22:39:21,757 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:39:21,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:39:21,758 INFO L85 PathProgramCache]: Analyzing trace with hash -166569456, now seen corresponding path program 1 times [2021-12-15 22:39:21,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:39:21,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585925217] [2021-12-15 22:39:21,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:39:21,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:39:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:39:21,888 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:39:21,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:39:21,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585925217] [2021-12-15 22:39:21,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585925217] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:39:21,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:39:21,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:39:21,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20336144] [2021-12-15 22:39:21,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:39:21,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:39:21,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:39:21,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:39:21,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:21,891 INFO L87 Difference]: Start difference. First operand 972 states and 1331 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 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) [2021-12-15 22:39:22,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:39:22,590 INFO L93 Difference]: Finished difference Result 2680 states and 3671 transitions. [2021-12-15 22:39:22,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:39:22,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 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 106 [2021-12-15 22:39:22,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:39:22,595 INFO L225 Difference]: With dead ends: 2680 [2021-12-15 22:39:22,595 INFO L226 Difference]: Without dead ends: 1710 [2021-12-15 22:39:22,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:22,598 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 120 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:39:22,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 192 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:39:22,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2021-12-15 22:39:22,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1709. [2021-12-15 22:39:22,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1709 states, 1708 states have (on average 1.2318501170960188) internal successors, (2104), 1708 states have internal predecessors, (2104), 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) [2021-12-15 22:39:22,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 2104 transitions. [2021-12-15 22:39:22,626 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 2104 transitions. Word has length 106 [2021-12-15 22:39:22,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:39:22,626 INFO L470 AbstractCegarLoop]: Abstraction has 1709 states and 2104 transitions. [2021-12-15 22:39:22,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 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) [2021-12-15 22:39:22,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 2104 transitions. [2021-12-15 22:39:22,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-12-15 22:39:22,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:39:22,630 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:39:22,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 22:39:22,631 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:39:22,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:39:22,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1961217037, now seen corresponding path program 1 times [2021-12-15 22:39:22,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:39:22,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842519829] [2021-12-15 22:39:22,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:39:22,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:39:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:39:22,755 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:39:22,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:39:22,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842519829] [2021-12-15 22:39:22,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842519829] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:39:22,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:39:22,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:39:22,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081606273] [2021-12-15 22:39:22,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:39:22,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:39:22,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:39:22,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:39:22,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:22,759 INFO L87 Difference]: Start difference. First operand 1709 states and 2104 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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) [2021-12-15 22:39:23,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:39:23,463 INFO L93 Difference]: Finished difference Result 3980 states and 4958 transitions. [2021-12-15 22:39:23,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:39:23,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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 217 [2021-12-15 22:39:23,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:39:23,474 INFO L225 Difference]: With dead ends: 3980 [2021-12-15 22:39:23,475 INFO L226 Difference]: Without dead ends: 2457 [2021-12-15 22:39:23,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:23,484 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 135 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:39:23,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 334 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:39:23,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-12-15 22:39:23,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2080. [2021-12-15 22:39:23,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 2079 states have (on average 1.227994227994228) internal successors, (2553), 2079 states have internal predecessors, (2553), 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) [2021-12-15 22:39:23,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 2553 transitions. [2021-12-15 22:39:23,526 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 2553 transitions. Word has length 217 [2021-12-15 22:39:23,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:39:23,528 INFO L470 AbstractCegarLoop]: Abstraction has 2080 states and 2553 transitions. [2021-12-15 22:39:23,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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) [2021-12-15 22:39:23,529 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 2553 transitions. [2021-12-15 22:39:23,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-12-15 22:39:23,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:39:23,532 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:39:23,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 22:39:23,535 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:39:23,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:39:23,536 INFO L85 PathProgramCache]: Analyzing trace with hash 629777389, now seen corresponding path program 1 times [2021-12-15 22:39:23,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:39:23,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812149242] [2021-12-15 22:39:23,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:39:23,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:39:23,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:39:23,664 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-15 22:39:23,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:39:23,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812149242] [2021-12-15 22:39:23,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812149242] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:39:23,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:39:23,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:39:23,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473971498] [2021-12-15 22:39:23,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:39:23,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:39:23,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:39:23,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:39:23,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:23,668 INFO L87 Difference]: Start difference. First operand 2080 states and 2553 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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) [2021-12-15 22:39:24,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:39:24,422 INFO L93 Difference]: Finished difference Result 5091 states and 6367 transitions. [2021-12-15 22:39:24,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:39:24,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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 218 [2021-12-15 22:39:24,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:39:24,430 INFO L225 Difference]: With dead ends: 5091 [2021-12-15 22:39:24,431 INFO L226 Difference]: Without dead ends: 2828 [2021-12-15 22:39:24,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:24,434 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 184 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:39:24,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 346 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:39:24,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2828 states. [2021-12-15 22:39:24,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2828 to 2828. [2021-12-15 22:39:24,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 1.2412451361867705) internal successors, (3509), 2827 states have internal predecessors, (3509), 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) [2021-12-15 22:39:24,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 3509 transitions. [2021-12-15 22:39:24,481 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 3509 transitions. Word has length 218 [2021-12-15 22:39:24,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:39:24,482 INFO L470 AbstractCegarLoop]: Abstraction has 2828 states and 3509 transitions. [2021-12-15 22:39:24,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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) [2021-12-15 22:39:24,482 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 3509 transitions. [2021-12-15 22:39:24,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-12-15 22:39:24,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:39:24,487 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:39:24,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 22:39:24,487 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:39:24,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:39:24,488 INFO L85 PathProgramCache]: Analyzing trace with hash 216235323, now seen corresponding path program 1 times [2021-12-15 22:39:24,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:39:24,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704328067] [2021-12-15 22:39:24,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:39:24,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:39:24,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:39:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:39:24,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:39:24,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704328067] [2021-12-15 22:39:24,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704328067] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:39:24,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:39:24,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:39:24,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644111312] [2021-12-15 22:39:24,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:39:24,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:39:24,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:39:24,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:39:24,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:39:24,621 INFO L87 Difference]: Start difference. First operand 2828 states and 3509 transitions. Second operand has 4 states, 4 states have (on average 63.75) internal successors, (255), 3 states have internal predecessors, (255), 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) [2021-12-15 22:39:25,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:39:25,840 INFO L93 Difference]: Finished difference Result 8627 states and 10846 transitions. [2021-12-15 22:39:25,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:39:25,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 63.75) internal successors, (255), 3 states have internal predecessors, (255), 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 255 [2021-12-15 22:39:25,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:39:25,858 INFO L225 Difference]: With dead ends: 8627 [2021-12-15 22:39:25,858 INFO L226 Difference]: Without dead ends: 5801 [2021-12-15 22:39:25,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:39:25,862 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 289 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-15 22:39:25,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 87 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-15 22:39:25,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5801 states. [2021-12-15 22:39:25,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5801 to 5432. [2021-12-15 22:39:25,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5432 states, 5431 states have (on average 1.2430491622169029) internal successors, (6751), 5431 states have internal predecessors, (6751), 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) [2021-12-15 22:39:25,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5432 states to 5432 states and 6751 transitions. [2021-12-15 22:39:25,957 INFO L78 Accepts]: Start accepts. Automaton has 5432 states and 6751 transitions. Word has length 255 [2021-12-15 22:39:25,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:39:25,958 INFO L470 AbstractCegarLoop]: Abstraction has 5432 states and 6751 transitions. [2021-12-15 22:39:25,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.75) internal successors, (255), 3 states have internal predecessors, (255), 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) [2021-12-15 22:39:25,958 INFO L276 IsEmpty]: Start isEmpty. Operand 5432 states and 6751 transitions. [2021-12-15 22:39:25,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-12-15 22:39:25,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:39:25,964 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:39:25,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 22:39:25,964 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:39:25,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:39:25,965 INFO L85 PathProgramCache]: Analyzing trace with hash -2143692386, now seen corresponding path program 1 times [2021-12-15 22:39:25,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:39:25,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078334000] [2021-12-15 22:39:25,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:39:25,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:39:26,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:39:26,074 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-15 22:39:26,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:39:26,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078334000] [2021-12-15 22:39:26,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078334000] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:39:26,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:39:26,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:39:26,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510831981] [2021-12-15 22:39:26,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:39:26,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:39:26,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:39:26,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:39:26,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:26,077 INFO L87 Difference]: Start difference. First operand 5432 states and 6751 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 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) [2021-12-15 22:39:26,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:39:26,783 INFO L93 Difference]: Finished difference Result 10679 states and 13514 transitions. [2021-12-15 22:39:26,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:39:26,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 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 269 [2021-12-15 22:39:26,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:39:26,804 INFO L225 Difference]: With dead ends: 10679 [2021-12-15 22:39:26,804 INFO L226 Difference]: Without dead ends: 6175 [2021-12-15 22:39:26,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:26,811 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 187 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:39:26,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 153 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:39:26,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6175 states. [2021-12-15 22:39:26,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6175 to 5432. [2021-12-15 22:39:26,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5432 states, 5431 states have (on average 1.2430491622169029) internal successors, (6751), 5431 states have internal predecessors, (6751), 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) [2021-12-15 22:39:26,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5432 states to 5432 states and 6751 transitions. [2021-12-15 22:39:26,904 INFO L78 Accepts]: Start accepts. Automaton has 5432 states and 6751 transitions. Word has length 269 [2021-12-15 22:39:26,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:39:26,906 INFO L470 AbstractCegarLoop]: Abstraction has 5432 states and 6751 transitions. [2021-12-15 22:39:26,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 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) [2021-12-15 22:39:26,906 INFO L276 IsEmpty]: Start isEmpty. Operand 5432 states and 6751 transitions. [2021-12-15 22:39:26,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-12-15 22:39:26,911 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:39:26,911 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:39:26,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 22:39:26,913 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:39:26,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:39:26,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1892161860, now seen corresponding path program 1 times [2021-12-15 22:39:26,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:39:26,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516865266] [2021-12-15 22:39:26,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:39:26,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:39:26,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:39:27,027 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-15 22:39:27,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:39:27,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516865266] [2021-12-15 22:39:27,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516865266] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:39:27,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:39:27,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:39:27,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200052883] [2021-12-15 22:39:27,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:39:27,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:39:27,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:39:27,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:39:27,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:27,030 INFO L87 Difference]: Start difference. First operand 5432 states and 6751 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 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) [2021-12-15 22:39:27,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:39:27,791 INFO L93 Difference]: Finished difference Result 14360 states and 18130 transitions. [2021-12-15 22:39:27,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:39:27,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 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 272 [2021-12-15 22:39:27,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:39:27,820 INFO L225 Difference]: With dead ends: 14360 [2021-12-15 22:39:27,820 INFO L226 Difference]: Without dead ends: 9298 [2021-12-15 22:39:27,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:27,828 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 183 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:39:27,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 107 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:39:27,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9298 states. [2021-12-15 22:39:27,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9298 to 9292. [2021-12-15 22:39:27,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9292 states, 9291 states have (on average 1.2449682488429663) internal successors, (11567), 9291 states have internal predecessors, (11567), 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) [2021-12-15 22:39:27,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9292 states to 9292 states and 11567 transitions. [2021-12-15 22:39:27,999 INFO L78 Accepts]: Start accepts. Automaton has 9292 states and 11567 transitions. Word has length 272 [2021-12-15 22:39:27,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:39:27,999 INFO L470 AbstractCegarLoop]: Abstraction has 9292 states and 11567 transitions. [2021-12-15 22:39:28,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 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) [2021-12-15 22:39:28,000 INFO L276 IsEmpty]: Start isEmpty. Operand 9292 states and 11567 transitions. [2021-12-15 22:39:28,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-12-15 22:39:28,009 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:39:28,009 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:39:28,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 22:39:28,010 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:39:28,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:39:28,013 INFO L85 PathProgramCache]: Analyzing trace with hash -218760648, now seen corresponding path program 1 times [2021-12-15 22:39:28,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:39:28,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054620686] [2021-12-15 22:39:28,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:39:28,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:39:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:39:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-12-15 22:39:28,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:39:28,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054620686] [2021-12-15 22:39:28,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054620686] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:39:28,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:39:28,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:39:28,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273461139] [2021-12-15 22:39:28,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:39:28,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:39:28,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:39:28,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:39:28,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:28,162 INFO L87 Difference]: Start difference. First operand 9292 states and 11567 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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) [2021-12-15 22:39:28,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:39:28,884 INFO L93 Difference]: Finished difference Result 19863 states and 25212 transitions. [2021-12-15 22:39:28,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:39:28,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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 310 [2021-12-15 22:39:28,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:39:28,914 INFO L225 Difference]: With dead ends: 19863 [2021-12-15 22:39:28,915 INFO L226 Difference]: Without dead ends: 12051 [2021-12-15 22:39:28,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:28,928 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 187 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:39:28,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 150 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:39:28,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12051 states. [2021-12-15 22:39:29,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12051 to 8543. [2021-12-15 22:39:29,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8543 states, 8542 states have (on average 1.244088035588855) internal successors, (10627), 8542 states have internal predecessors, (10627), 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) [2021-12-15 22:39:29,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8543 states to 8543 states and 10627 transitions. [2021-12-15 22:39:29,082 INFO L78 Accepts]: Start accepts. Automaton has 8543 states and 10627 transitions. Word has length 310 [2021-12-15 22:39:29,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:39:29,082 INFO L470 AbstractCegarLoop]: Abstraction has 8543 states and 10627 transitions. [2021-12-15 22:39:29,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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) [2021-12-15 22:39:29,083 INFO L276 IsEmpty]: Start isEmpty. Operand 8543 states and 10627 transitions. [2021-12-15 22:39:29,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2021-12-15 22:39:29,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:39:29,100 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:39:29,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 22:39:29,101 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:39:29,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:39:29,102 INFO L85 PathProgramCache]: Analyzing trace with hash 525833242, now seen corresponding path program 1 times [2021-12-15 22:39:29,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:39:29,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090143140] [2021-12-15 22:39:29,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:39:29,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:39:29,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:39:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2021-12-15 22:39:29,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:39:29,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090143140] [2021-12-15 22:39:29,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090143140] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:39:29,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:39:29,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:39:29,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277341917] [2021-12-15 22:39:29,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:39:29,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:39:29,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:39:29,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:39:29,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:29,305 INFO L87 Difference]: Start difference. First operand 8543 states and 10627 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 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) [2021-12-15 22:39:29,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:39:29,977 INFO L93 Difference]: Finished difference Result 19842 states and 24881 transitions. [2021-12-15 22:39:29,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:39:29,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 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 389 [2021-12-15 22:39:29,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:39:29,998 INFO L225 Difference]: With dead ends: 19842 [2021-12-15 22:39:29,998 INFO L226 Difference]: Without dead ends: 11301 [2021-12-15 22:39:30,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:30,011 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 78 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:39:30,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 148 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:39:30,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11301 states. [2021-12-15 22:39:30,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11301 to 7801. [2021-12-15 22:39:30,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7801 states, 7800 states have (on average 1.2061538461538461) internal successors, (9408), 7800 states have internal predecessors, (9408), 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) [2021-12-15 22:39:30,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7801 states to 7801 states and 9408 transitions. [2021-12-15 22:39:30,150 INFO L78 Accepts]: Start accepts. Automaton has 7801 states and 9408 transitions. Word has length 389 [2021-12-15 22:39:30,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:39:30,151 INFO L470 AbstractCegarLoop]: Abstraction has 7801 states and 9408 transitions. [2021-12-15 22:39:30,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 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) [2021-12-15 22:39:30,153 INFO L276 IsEmpty]: Start isEmpty. Operand 7801 states and 9408 transitions. [2021-12-15 22:39:30,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2021-12-15 22:39:30,164 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:39:30,165 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 22:39:30,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 22:39:30,165 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:39:30,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:39:30,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1148105623, now seen corresponding path program 1 times [2021-12-15 22:39:30,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:39:30,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016113448] [2021-12-15 22:39:30,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:39:30,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:39:30,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:39:30,363 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 320 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-15 22:39:30,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:39:30,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016113448] [2021-12-15 22:39:30,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016113448] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:39:30,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:39:30,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:39:30,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473890301] [2021-12-15 22:39:30,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:39:30,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:39:30,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:39:30,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:39:30,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:39:30,366 INFO L87 Difference]: Start difference. First operand 7801 states and 9408 transitions. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 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) [2021-12-15 22:39:31,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:39:31,656 INFO L93 Difference]: Finished difference Result 23362 states and 28069 transitions. [2021-12-15 22:39:31,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:39:31,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 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 394 [2021-12-15 22:39:31,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:39:31,687 INFO L225 Difference]: With dead ends: 23362 [2021-12-15 22:39:31,687 INFO L226 Difference]: Without dead ends: 15563 [2021-12-15 22:39:31,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:39:31,697 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 302 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:39:31,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 87 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 22:39:31,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15563 states. [2021-12-15 22:39:31,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15563 to 13347. [2021-12-15 22:39:31,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13347 states, 13346 states have (on average 1.1967630750786753) internal successors, (15972), 13346 states have internal predecessors, (15972), 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) [2021-12-15 22:39:31,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13347 states to 13347 states and 15972 transitions. [2021-12-15 22:39:31,872 INFO L78 Accepts]: Start accepts. Automaton has 13347 states and 15972 transitions. Word has length 394 [2021-12-15 22:39:31,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:39:31,872 INFO L470 AbstractCegarLoop]: Abstraction has 13347 states and 15972 transitions. [2021-12-15 22:39:31,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 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) [2021-12-15 22:39:31,873 INFO L276 IsEmpty]: Start isEmpty. Operand 13347 states and 15972 transitions. [2021-12-15 22:39:31,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2021-12-15 22:39:31,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:39:31,891 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:39:31,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 22:39:31,892 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:39:31,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:39:31,893 INFO L85 PathProgramCache]: Analyzing trace with hash -395850802, now seen corresponding path program 1 times [2021-12-15 22:39:31,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:39:31,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814562792] [2021-12-15 22:39:31,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:39:31,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:39:31,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:39:32,103 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 428 proven. 0 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2021-12-15 22:39:32,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:39:32,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814562792] [2021-12-15 22:39:32,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814562792] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:39:32,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:39:32,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:39:32,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407175835] [2021-12-15 22:39:32,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:39:32,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:39:32,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:39:32,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:39:32,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:32,106 INFO L87 Difference]: Start difference. First operand 13347 states and 15972 transitions. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 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) [2021-12-15 22:39:32,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:39:32,840 INFO L93 Difference]: Finished difference Result 26134 states and 31281 transitions. [2021-12-15 22:39:32,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:39:32,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 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 514 [2021-12-15 22:39:32,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:39:32,858 INFO L225 Difference]: With dead ends: 26134 [2021-12-15 22:39:32,859 INFO L226 Difference]: Without dead ends: 12789 [2021-12-15 22:39:32,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:32,870 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 68 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:39:32,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 312 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:39:32,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12789 states. [2021-12-15 22:39:32,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12789 to 9649. [2021-12-15 22:39:32,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9649 states, 9648 states have (on average 1.1842868988391377) internal successors, (11426), 9648 states have internal predecessors, (11426), 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) [2021-12-15 22:39:32,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9649 states to 9649 states and 11426 transitions. [2021-12-15 22:39:32,984 INFO L78 Accepts]: Start accepts. Automaton has 9649 states and 11426 transitions. Word has length 514 [2021-12-15 22:39:32,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:39:32,985 INFO L470 AbstractCegarLoop]: Abstraction has 9649 states and 11426 transitions. [2021-12-15 22:39:32,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 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) [2021-12-15 22:39:32,986 INFO L276 IsEmpty]: Start isEmpty. Operand 9649 states and 11426 transitions. [2021-12-15 22:39:33,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2021-12-15 22:39:33,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:39:33,002 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:39:33,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 22:39:33,003 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:39:33,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:39:33,003 INFO L85 PathProgramCache]: Analyzing trace with hash -584826003, now seen corresponding path program 1 times [2021-12-15 22:39:33,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:39:33,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548154096] [2021-12-15 22:39:33,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:39:33,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:39:33,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:39:33,237 INFO L134 CoverageAnalysis]: Checked inductivity of 755 backedges. 559 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-12-15 22:39:33,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:39:33,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548154096] [2021-12-15 22:39:33,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548154096] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:39:33,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:39:33,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:39:33,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143326396] [2021-12-15 22:39:33,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:39:33,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:39:33,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:39:33,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:39:33,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:39:33,241 INFO L87 Difference]: Start difference. First operand 9649 states and 11426 transitions. Second operand has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 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) [2021-12-15 22:39:34,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:39:34,429 INFO L93 Difference]: Finished difference Result 22812 states and 27047 transitions. [2021-12-15 22:39:34,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:39:34,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 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 535 [2021-12-15 22:39:34,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:39:34,446 INFO L225 Difference]: With dead ends: 22812 [2021-12-15 22:39:34,446 INFO L226 Difference]: Without dead ends: 13165 [2021-12-15 22:39:34,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:39:34,485 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 301 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-15 22:39:34,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 87 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-15 22:39:34,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13165 states. [2021-12-15 22:39:34,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13165 to 9464. [2021-12-15 22:39:34,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9464 states, 9463 states have (on average 1.1872556271795414) internal successors, (11235), 9463 states have internal predecessors, (11235), 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) [2021-12-15 22:39:34,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9464 states to 9464 states and 11235 transitions. [2021-12-15 22:39:34,582 INFO L78 Accepts]: Start accepts. Automaton has 9464 states and 11235 transitions. Word has length 535 [2021-12-15 22:39:34,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:39:34,583 INFO L470 AbstractCegarLoop]: Abstraction has 9464 states and 11235 transitions. [2021-12-15 22:39:34,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 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) [2021-12-15 22:39:34,583 INFO L276 IsEmpty]: Start isEmpty. Operand 9464 states and 11235 transitions. [2021-12-15 22:39:34,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2021-12-15 22:39:34,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:39:34,597 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:39:34,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 22:39:34,597 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:39:34,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:39:34,598 INFO L85 PathProgramCache]: Analyzing trace with hash -861206840, now seen corresponding path program 1 times [2021-12-15 22:39:34,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:39:34,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939024279] [2021-12-15 22:39:34,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:39:34,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:39:34,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:39:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 705 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-15 22:39:34,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:39:34,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939024279] [2021-12-15 22:39:34,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939024279] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:39:34,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:39:34,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:39:34,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747069850] [2021-12-15 22:39:34,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:39:34,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:39:34,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:39:34,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:39:34,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:39:34,797 INFO L87 Difference]: Start difference. First operand 9464 states and 11235 transitions. Second operand has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 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) [2021-12-15 22:39:35,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:39:35,953 INFO L93 Difference]: Finished difference Result 25570 states and 30440 transitions. [2021-12-15 22:39:35,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:39:35,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 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 561 [2021-12-15 22:39:35,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:39:35,983 INFO L225 Difference]: With dead ends: 25570 [2021-12-15 22:39:35,983 INFO L226 Difference]: Without dead ends: 16108 [2021-12-15 22:39:35,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:39:35,999 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 199 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-15 22:39:35,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 87 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-15 22:39:36,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16108 states. [2021-12-15 22:39:36,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16108 to 12600. [2021-12-15 22:39:36,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12600 states, 12599 states have (on average 1.1793793158187158) internal successors, (14859), 12599 states have internal predecessors, (14859), 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) [2021-12-15 22:39:36,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12600 states to 12600 states and 14859 transitions. [2021-12-15 22:39:36,237 INFO L78 Accepts]: Start accepts. Automaton has 12600 states and 14859 transitions. Word has length 561 [2021-12-15 22:39:36,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:39:36,237 INFO L470 AbstractCegarLoop]: Abstraction has 12600 states and 14859 transitions. [2021-12-15 22:39:36,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 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) [2021-12-15 22:39:36,238 INFO L276 IsEmpty]: Start isEmpty. Operand 12600 states and 14859 transitions. [2021-12-15 22:39:36,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 578 [2021-12-15 22:39:36,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:39:36,254 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:39:36,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 22:39:36,255 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:39:36,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:39:36,256 INFO L85 PathProgramCache]: Analyzing trace with hash 922624536, now seen corresponding path program 1 times [2021-12-15 22:39:36,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:39:36,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153286861] [2021-12-15 22:39:36,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:39:36,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:39:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:39:36,448 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 637 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-12-15 22:39:36,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:39:36,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153286861] [2021-12-15 22:39:36,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153286861] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:39:36,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:39:36,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:39:36,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302419109] [2021-12-15 22:39:36,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:39:36,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:39:36,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:39:36,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:39:36,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:36,453 INFO L87 Difference]: Start difference. First operand 12600 states and 14859 transitions. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 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) [2021-12-15 22:39:37,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:39:37,152 INFO L93 Difference]: Finished difference Result 25012 states and 29512 transitions. [2021-12-15 22:39:37,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:39:37,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 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 577 [2021-12-15 22:39:37,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:39:37,170 INFO L225 Difference]: With dead ends: 25012 [2021-12-15 22:39:37,171 INFO L226 Difference]: Without dead ends: 12414 [2021-12-15 22:39:37,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:37,178 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 147 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:39:37,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 301 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 22:39:37,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12414 states. [2021-12-15 22:39:37,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12414 to 11862. [2021-12-15 22:39:37,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11862 states, 11861 states have (on average 1.1745215411853975) internal successors, (13931), 11861 states have internal predecessors, (13931), 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) [2021-12-15 22:39:37,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11862 states to 11862 states and 13931 transitions. [2021-12-15 22:39:37,335 INFO L78 Accepts]: Start accepts. Automaton has 11862 states and 13931 transitions. Word has length 577 [2021-12-15 22:39:37,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:39:37,336 INFO L470 AbstractCegarLoop]: Abstraction has 11862 states and 13931 transitions. [2021-12-15 22:39:37,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 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) [2021-12-15 22:39:37,336 INFO L276 IsEmpty]: Start isEmpty. Operand 11862 states and 13931 transitions. [2021-12-15 22:39:37,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 603 [2021-12-15 22:39:37,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:39:37,357 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:39:37,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 22:39:37,357 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:39:37,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:39:37,358 INFO L85 PathProgramCache]: Analyzing trace with hash 802140522, now seen corresponding path program 1 times [2021-12-15 22:39:37,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:39:37,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610859882] [2021-12-15 22:39:37,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:39:37,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:39:37,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:39:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 600 proven. 0 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-12-15 22:39:37,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:39:37,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610859882] [2021-12-15 22:39:37,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610859882] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:39:37,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:39:37,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:39:37,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174816445] [2021-12-15 22:39:37,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:39:37,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:39:37,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:39:37,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:39:37,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:37,543 INFO L87 Difference]: Start difference. First operand 11862 states and 13931 transitions. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 2 states have internal predecessors, (306), 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) [2021-12-15 22:39:37,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:39:37,919 INFO L93 Difference]: Finished difference Result 23713 states and 27851 transitions. [2021-12-15 22:39:37,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:39:37,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 2 states have internal predecessors, (306), 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 602 [2021-12-15 22:39:37,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:39:37,976 INFO L225 Difference]: With dead ends: 23713 [2021-12-15 22:39:37,976 INFO L226 Difference]: Without dead ends: 11853 [2021-12-15 22:39:37,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:37,979 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 186 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:39:37,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 38 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 22:39:37,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11853 states. [2021-12-15 22:39:38,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11853 to 11849. [2021-12-15 22:39:38,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11849 states, 11848 states have (on average 1.1737002025658338) internal successors, (13906), 11848 states have internal predecessors, (13906), 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) [2021-12-15 22:39:38,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11849 states to 11849 states and 13906 transitions. [2021-12-15 22:39:38,095 INFO L78 Accepts]: Start accepts. Automaton has 11849 states and 13906 transitions. Word has length 602 [2021-12-15 22:39:38,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:39:38,095 INFO L470 AbstractCegarLoop]: Abstraction has 11849 states and 13906 transitions. [2021-12-15 22:39:38,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 2 states have internal predecessors, (306), 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) [2021-12-15 22:39:38,096 INFO L276 IsEmpty]: Start isEmpty. Operand 11849 states and 13906 transitions. [2021-12-15 22:39:38,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2021-12-15 22:39:38,109 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:39:38,109 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:39:38,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 22:39:38,109 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:39:38,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:39:38,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1235396714, now seen corresponding path program 1 times [2021-12-15 22:39:38,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:39:38,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124875096] [2021-12-15 22:39:38,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:39:38,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:39:38,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:39:38,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 1050 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-15 22:39:38,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:39:38,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124875096] [2021-12-15 22:39:38,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124875096] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:39:38,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:39:38,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:39:38,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310431502] [2021-12-15 22:39:38,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:39:38,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:39:38,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:39:38,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:39:38,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:39:38,308 INFO L87 Difference]: Start difference. First operand 11849 states and 13906 transitions. Second operand has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 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) [2021-12-15 22:39:39,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:39:39,269 INFO L93 Difference]: Finished difference Result 30727 states and 35991 transitions. [2021-12-15 22:39:39,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:39:39,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 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 617 [2021-12-15 22:39:39,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:39:39,286 INFO L225 Difference]: With dead ends: 30727 [2021-12-15 22:39:39,287 INFO L226 Difference]: Without dead ends: 18880 [2021-12-15 22:39:39,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:39:39,298 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 194 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 22:39:39,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 142 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 22:39:39,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18880 states. [2021-12-15 22:39:39,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18880 to 15920. [2021-12-15 22:39:39,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15920 states, 15919 states have (on average 1.1625102079276337) internal successors, (18506), 15919 states have internal predecessors, (18506), 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) [2021-12-15 22:39:39,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15920 states to 15920 states and 18506 transitions. [2021-12-15 22:39:39,536 INFO L78 Accepts]: Start accepts. Automaton has 15920 states and 18506 transitions. Word has length 617 [2021-12-15 22:39:39,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:39:39,536 INFO L470 AbstractCegarLoop]: Abstraction has 15920 states and 18506 transitions. [2021-12-15 22:39:39,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 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) [2021-12-15 22:39:39,536 INFO L276 IsEmpty]: Start isEmpty. Operand 15920 states and 18506 transitions. [2021-12-15 22:39:39,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 627 [2021-12-15 22:39:39,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:39:39,550 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:39:39,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 22:39:39,551 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:39:39,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:39:39,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1165858962, now seen corresponding path program 1 times [2021-12-15 22:39:39,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:39:39,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22398583] [2021-12-15 22:39:39,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:39:39,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:39:39,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:39:39,777 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 621 proven. 154 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-12-15 22:39:39,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:39:39,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22398583] [2021-12-15 22:39:39,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22398583] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:39:39,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66241811] [2021-12-15 22:39:39,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:39:39,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:39:39,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:39:39,784 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) [2021-12-15 22:39:39,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 22:39:40,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:39:40,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-15 22:39:40,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:39:42,293 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 621 proven. 154 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-12-15 22:39:42,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 22:39:44,610 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 621 proven. 154 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-12-15 22:39:44,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66241811] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 22:39:44,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 22:39:44,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2021-12-15 22:39:44,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835296742] [2021-12-15 22:39:44,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 22:39:44,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 22:39:44,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:39:44,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 22:39:44,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:39:44,615 INFO L87 Difference]: Start difference. First operand 15920 states and 18506 transitions. Second operand has 5 states, 5 states have (on average 93.8) internal successors, (469), 4 states have internal predecessors, (469), 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) [2021-12-15 22:39:46,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:39:46,048 INFO L93 Difference]: Finished difference Result 35632 states and 41383 transitions. [2021-12-15 22:39:46,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 22:39:46,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 93.8) internal successors, (469), 4 states have internal predecessors, (469), 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 626 [2021-12-15 22:39:46,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:39:46,074 INFO L225 Difference]: With dead ends: 35632 [2021-12-15 22:39:46,074 INFO L226 Difference]: Without dead ends: 18978 [2021-12-15 22:39:46,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1256 GetRequests, 1249 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:39:46,090 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 386 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1432 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 1432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:39:46,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 61 Invalid, 1755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 1432 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 22:39:46,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18978 states. [2021-12-15 22:39:46,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18978 to 18302. [2021-12-15 22:39:46,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18302 states, 18301 states have (on average 1.1393366482705862) internal successors, (20851), 18301 states have internal predecessors, (20851), 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) [2021-12-15 22:39:46,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18302 states to 18302 states and 20851 transitions. [2021-12-15 22:39:46,322 INFO L78 Accepts]: Start accepts. Automaton has 18302 states and 20851 transitions. Word has length 626 [2021-12-15 22:39:46,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:39:46,322 INFO L470 AbstractCegarLoop]: Abstraction has 18302 states and 20851 transitions. [2021-12-15 22:39:46,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.8) internal successors, (469), 4 states have internal predecessors, (469), 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) [2021-12-15 22:39:46,322 INFO L276 IsEmpty]: Start isEmpty. Operand 18302 states and 20851 transitions. [2021-12-15 22:39:46,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2021-12-15 22:39:46,338 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:39:46,339 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 22:39:46,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 22:39:46,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:39:46,558 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:39:46,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:39:46,559 INFO L85 PathProgramCache]: Analyzing trace with hash -519996029, now seen corresponding path program 1 times [2021-12-15 22:39:46,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:39:46,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628815101] [2021-12-15 22:39:46,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:39:46,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:39:46,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:39:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1229 backedges. 838 proven. 0 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-12-15 22:39:46,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:39:46,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628815101] [2021-12-15 22:39:46,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628815101] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:39:46,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:39:46,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:39:46,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164697752] [2021-12-15 22:39:46,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:39:46,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:39:46,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:39:46,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:39:46,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:39:46,757 INFO L87 Difference]: Start difference. First operand 18302 states and 20851 transitions. Second operand has 4 states, 4 states have (on average 98.5) internal successors, (394), 3 states have internal predecessors, (394), 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) [2021-12-15 22:39:47,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:39:47,860 INFO L93 Difference]: Finished difference Result 40474 states and 46062 transitions. [2021-12-15 22:39:47,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:39:47,860 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 98.5) internal successors, (394), 3 states have internal predecessors, (394), 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 627 [2021-12-15 22:39:47,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:39:47,885 INFO L225 Difference]: With dead ends: 40474 [2021-12-15 22:39:47,886 INFO L226 Difference]: Without dead ends: 22540 [2021-12-15 22:39:47,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:39:47,900 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 201 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:39:47,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 87 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 22:39:47,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22540 states. [2021-12-15 22:39:48,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22540 to 21058. [2021-12-15 22:39:48,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21058 states, 21057 states have (on average 1.1233319086289595) internal successors, (23654), 21057 states have internal predecessors, (23654), 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) [2021-12-15 22:39:48,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21058 states to 21058 states and 23654 transitions. [2021-12-15 22:39:48,199 INFO L78 Accepts]: Start accepts. Automaton has 21058 states and 23654 transitions. Word has length 627 [2021-12-15 22:39:48,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:39:48,200 INFO L470 AbstractCegarLoop]: Abstraction has 21058 states and 23654 transitions. [2021-12-15 22:39:48,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 98.5) internal successors, (394), 3 states have internal predecessors, (394), 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) [2021-12-15 22:39:48,200 INFO L276 IsEmpty]: Start isEmpty. Operand 21058 states and 23654 transitions. [2021-12-15 22:39:48,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 633 [2021-12-15 22:39:48,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:39:48,221 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:39:48,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-15 22:39:48,222 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:39:48,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:39:48,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1582114301, now seen corresponding path program 1 times [2021-12-15 22:39:48,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:39:48,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403120937] [2021-12-15 22:39:48,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:39:48,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:39:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:39:48,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 604 proven. 0 refuted. 0 times theorem prover too weak. 557 trivial. 0 not checked. [2021-12-15 22:39:48,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:39:48,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403120937] [2021-12-15 22:39:48,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403120937] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:39:48,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:39:48,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:39:48,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077567071] [2021-12-15 22:39:48,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:39:48,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:39:48,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:39:48,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:39:48,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:48,443 INFO L87 Difference]: Start difference. First operand 21058 states and 23654 transitions. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 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) [2021-12-15 22:39:49,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:39:49,118 INFO L93 Difference]: Finished difference Result 42123 states and 47421 transitions. [2021-12-15 22:39:49,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:39:49,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 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 632 [2021-12-15 22:39:49,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:39:49,139 INFO L225 Difference]: With dead ends: 42123 [2021-12-15 22:39:49,140 INFO L226 Difference]: Without dead ends: 21987 [2021-12-15 22:39:49,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:49,152 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 31 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:39:49,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 345 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:39:49,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21987 states. [2021-12-15 22:39:49,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21987 to 21054. [2021-12-15 22:39:49,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21054 states, 21053 states have (on average 1.098275780173847) internal successors, (23122), 21053 states have internal predecessors, (23122), 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) [2021-12-15 22:39:49,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21054 states to 21054 states and 23122 transitions. [2021-12-15 22:39:49,348 INFO L78 Accepts]: Start accepts. Automaton has 21054 states and 23122 transitions. Word has length 632 [2021-12-15 22:39:49,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:39:49,349 INFO L470 AbstractCegarLoop]: Abstraction has 21054 states and 23122 transitions. [2021-12-15 22:39:49,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 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) [2021-12-15 22:39:49,349 INFO L276 IsEmpty]: Start isEmpty. Operand 21054 states and 23122 transitions. [2021-12-15 22:39:49,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 698 [2021-12-15 22:39:49,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:39:49,371 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 22:39:49,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-15 22:39:49,371 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:39:49,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:39:49,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1072353647, now seen corresponding path program 1 times [2021-12-15 22:39:49,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:39:49,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811136961] [2021-12-15 22:39:49,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:39:49,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:39:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:39:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1599 backedges. 1040 proven. 0 refuted. 0 times theorem prover too weak. 559 trivial. 0 not checked. [2021-12-15 22:39:49,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:39:49,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811136961] [2021-12-15 22:39:49,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811136961] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:39:49,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:39:49,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:39:49,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300088603] [2021-12-15 22:39:49,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:39:49,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:39:49,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:39:49,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:39:49,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:49,607 INFO L87 Difference]: Start difference. First operand 21054 states and 23122 transitions. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 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) [2021-12-15 22:39:50,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:39:50,267 INFO L93 Difference]: Finished difference Result 41732 states and 45857 transitions. [2021-12-15 22:39:50,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:39:50,268 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 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 697 [2021-12-15 22:39:50,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:39:50,287 INFO L225 Difference]: With dead ends: 41732 [2021-12-15 22:39:50,288 INFO L226 Difference]: Without dead ends: 21602 [2021-12-15 22:39:50,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:50,298 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 102 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:39:50,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 129 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:39:50,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21602 states. [2021-12-15 22:39:50,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21602 to 20312. [2021-12-15 22:39:50,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20312 states, 20311 states have (on average 1.093200728669194) internal successors, (22204), 20311 states have internal predecessors, (22204), 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) [2021-12-15 22:39:50,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20312 states to 20312 states and 22204 transitions. [2021-12-15 22:39:50,479 INFO L78 Accepts]: Start accepts. Automaton has 20312 states and 22204 transitions. Word has length 697 [2021-12-15 22:39:50,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:39:50,480 INFO L470 AbstractCegarLoop]: Abstraction has 20312 states and 22204 transitions. [2021-12-15 22:39:50,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 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) [2021-12-15 22:39:50,480 INFO L276 IsEmpty]: Start isEmpty. Operand 20312 states and 22204 transitions. [2021-12-15 22:39:50,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 716 [2021-12-15 22:39:50,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:39:50,495 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:39:50,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-15 22:39:50,495 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:39:50,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:39:50,496 INFO L85 PathProgramCache]: Analyzing trace with hash 491490049, now seen corresponding path program 1 times [2021-12-15 22:39:50,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:39:50,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583211225] [2021-12-15 22:39:50,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:39:50,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:39:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:39:50,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 1002 proven. 0 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2021-12-15 22:39:50,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:39:50,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583211225] [2021-12-15 22:39:50,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583211225] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:39:50,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:39:50,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:39:50,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658330822] [2021-12-15 22:39:50,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:39:50,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:39:50,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:39:50,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:39:50,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:50,681 INFO L87 Difference]: Start difference. First operand 20312 states and 22204 transitions. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 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) [2021-12-15 22:39:51,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:39:51,259 INFO L93 Difference]: Finished difference Result 38956 states and 42585 transitions. [2021-12-15 22:39:51,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:39:51,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 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 715 [2021-12-15 22:39:51,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:39:51,286 INFO L225 Difference]: With dead ends: 38956 [2021-12-15 22:39:51,286 INFO L226 Difference]: Without dead ends: 19568 [2021-12-15 22:39:51,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:39:51,298 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 189 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:39:51,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 310 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 22:39:51,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19568 states. [2021-12-15 22:39:51,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19568 to 17534. [2021-12-15 22:39:51,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17534 states, 17533 states have (on average 1.0811612388068215) internal successors, (18956), 17533 states have internal predecessors, (18956), 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) [2021-12-15 22:39:51,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17534 states to 17534 states and 18956 transitions. [2021-12-15 22:39:51,466 INFO L78 Accepts]: Start accepts. Automaton has 17534 states and 18956 transitions. Word has length 715 [2021-12-15 22:39:51,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:39:51,466 INFO L470 AbstractCegarLoop]: Abstraction has 17534 states and 18956 transitions. [2021-12-15 22:39:51,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 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) [2021-12-15 22:39:51,466 INFO L276 IsEmpty]: Start isEmpty. Operand 17534 states and 18956 transitions. [2021-12-15 22:39:51,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 721 [2021-12-15 22:39:51,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:39:51,484 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:39:51,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-15 22:39:51,485 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:39:51,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:39:51,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1182775230, now seen corresponding path program 1 times [2021-12-15 22:39:51,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:39:51,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980142959] [2021-12-15 22:39:51,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:39:51,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:39:51,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:39:51,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 875 proven. 163 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-12-15 22:39:51,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:39:51,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980142959] [2021-12-15 22:39:51,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980142959] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:39:51,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443019358] [2021-12-15 22:39:51,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:39:51,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:39:51,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:39:51,844 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) [2021-12-15 22:39:51,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 22:39:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:39:52,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:39:52,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:39:53,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 882 proven. 0 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-12-15 22:39:53,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:39:53,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443019358] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:39:53,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:39:53,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-15 22:39:53,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712411387] [2021-12-15 22:39:53,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:39:53,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:39:53,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:39:53,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:39:53,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:39:53,031 INFO L87 Difference]: Start difference. First operand 17534 states and 18956 transitions. Second operand has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 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) [2021-12-15 22:39:53,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:39:53,569 INFO L93 Difference]: Finished difference Result 35065 states and 37900 transitions. [2021-12-15 22:39:53,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:39:53,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 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 720 [2021-12-15 22:39:53,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:39:53,586 INFO L225 Difference]: With dead ends: 35065 [2021-12-15 22:39:53,587 INFO L226 Difference]: Without dead ends: 17717 [2021-12-15 22:39:53,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 724 GetRequests, 719 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:39:53,598 INFO L933 BasicCegarLoop]: 302 mSDtfsCounter, 104 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:39:53,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 316 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 22:39:53,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17717 states. [2021-12-15 22:39:53,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17717 to 17532. [2021-12-15 22:39:53,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17532 states, 17531 states have (on average 1.0720438081113457) internal successors, (18794), 17531 states have internal predecessors, (18794), 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) [2021-12-15 22:39:53,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17532 states to 17532 states and 18794 transitions. [2021-12-15 22:39:53,793 INFO L78 Accepts]: Start accepts. Automaton has 17532 states and 18794 transitions. Word has length 720 [2021-12-15 22:39:53,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:39:53,794 INFO L470 AbstractCegarLoop]: Abstraction has 17532 states and 18794 transitions. [2021-12-15 22:39:53,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 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) [2021-12-15 22:39:53,794 INFO L276 IsEmpty]: Start isEmpty. Operand 17532 states and 18794 transitions. [2021-12-15 22:39:53,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 752 [2021-12-15 22:39:53,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:39:53,812 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:39:53,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-15 22:39:54,012 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,SelfDestructingSolverStorable23 [2021-12-15 22:39:54,012 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:39:54,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:39:54,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1687943336, now seen corresponding path program 1 times [2021-12-15 22:39:54,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:39:54,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299239030] [2021-12-15 22:39:54,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:39:54,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:39:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:39:54,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1666 backedges. 1112 proven. 393 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-15 22:39:54,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:39:54,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299239030] [2021-12-15 22:39:54,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299239030] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:39:54,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219858876] [2021-12-15 22:39:54,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:39:54,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:39:54,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:39:54,319 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) [2021-12-15 22:39:54,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 22:39:54,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:39:54,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 22:39:54,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:39:55,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1666 backedges. 1226 proven. 0 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2021-12-15 22:39:55,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:39:55,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219858876] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:39:55,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:39:55,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-15 22:39:55,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614964978] [2021-12-15 22:39:55,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:39:55,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:39:55,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:39:55,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:39:55,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:39:55,748 INFO L87 Difference]: Start difference. First operand 17532 states and 18794 transitions. Second operand has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 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) [2021-12-15 22:39:56,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:39:56,242 INFO L93 Difference]: Finished difference Result 34522 states and 37066 transitions. [2021-12-15 22:39:56,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:39:56,243 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 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 751 [2021-12-15 22:39:56,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:39:56,260 INFO L225 Difference]: With dead ends: 34522 [2021-12-15 22:39:56,261 INFO L226 Difference]: Without dead ends: 18098 [2021-12-15 22:39:56,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 756 GetRequests, 751 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:39:56,274 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 87 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:39:56,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 297 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 22:39:56,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18098 states. [2021-12-15 22:39:56,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18098 to 17720. [2021-12-15 22:39:56,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17720 states, 17719 states have (on average 1.0716180371352786) internal successors, (18988), 17719 states have internal predecessors, (18988), 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) [2021-12-15 22:39:56,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17720 states to 17720 states and 18988 transitions. [2021-12-15 22:39:56,448 INFO L78 Accepts]: Start accepts. Automaton has 17720 states and 18988 transitions. Word has length 751 [2021-12-15 22:39:56,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:39:56,449 INFO L470 AbstractCegarLoop]: Abstraction has 17720 states and 18988 transitions. [2021-12-15 22:39:56,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 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) [2021-12-15 22:39:56,449 INFO L276 IsEmpty]: Start isEmpty. Operand 17720 states and 18988 transitions. [2021-12-15 22:39:56,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 794 [2021-12-15 22:39:56,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:39:56,470 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:39:56,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 22:39:56,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:39:56,684 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:39:56,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:39:56,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1357005314, now seen corresponding path program 1 times [2021-12-15 22:39:56,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:39:56,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827012967] [2021-12-15 22:39:56,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:39:56,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:39:56,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:39:57,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 1521 proven. 0 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2021-12-15 22:39:57,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:39:57,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827012967] [2021-12-15 22:39:57,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827012967] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:39:57,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:39:57,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:39:57,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389687052] [2021-12-15 22:39:57,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:39:57,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:39:57,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:39:57,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:39:57,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:39:57,034 INFO L87 Difference]: Start difference. First operand 17720 states and 18988 transitions. Second operand has 4 states, 4 states have (on average 136.5) internal successors, (546), 4 states have internal predecessors, (546), 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) [2021-12-15 22:39:57,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:39:57,784 INFO L93 Difference]: Finished difference Result 32122 states and 34414 transitions. [2021-12-15 22:39:57,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:39:57,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 136.5) internal successors, (546), 4 states have internal predecessors, (546), 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 793 [2021-12-15 22:39:57,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:39:57,785 INFO L225 Difference]: With dead ends: 32122 [2021-12-15 22:39:57,785 INFO L226 Difference]: Without dead ends: 0 [2021-12-15 22:39:57,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:39:57,796 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 188 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:39:57,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 98 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:39:57,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-15 22:39:57,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-15 22:39:57,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-12-15 22:39:57,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-15 22:39:57,797 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 793 [2021-12-15 22:39:57,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:39:57,797 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-15 22:39:57,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 136.5) internal successors, (546), 4 states have internal predecessors, (546), 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) [2021-12-15 22:39:57,798 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-15 22:39:57,798 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-15 22:39:57,800 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-15 22:39:57,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-15 22:39:57,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.