./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label05.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/Problem17_label05.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 9ab20fd2c170582703dc94cfdcd8e10a79137aac9ab76b1936884b512261ae10 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:57:02,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:57:02,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:57:02,775 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:57:02,776 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:57:02,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:57:02,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:57:02,781 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:57:02,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:57:02,785 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:57:02,786 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:57:02,787 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:57:02,787 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:57:02,789 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:57:02,790 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:57:02,793 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:57:02,795 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:57:02,796 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:57:02,796 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:57:02,799 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:57:02,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:57:02,801 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:57:02,802 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:57:02,803 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:57:02,807 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:57:02,808 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:57:02,809 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:57:02,809 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:57:02,810 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:57:02,810 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:57:02,811 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:57:02,811 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:57:02,812 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:57:02,813 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:57:02,814 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:57:02,814 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:57:02,814 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:57:02,814 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:57:02,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:57:02,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:57:02,816 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:57:02,817 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:57:02,840 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:57:02,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:57:02,841 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:57:02,841 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:57:02,842 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:57:02,842 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:57:02,842 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:57:02,843 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:57:02,843 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:57:02,843 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:57:02,843 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:57:02,844 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:57:02,844 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:57:02,844 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:57:02,844 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:57:02,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:57:02,844 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:57:02,844 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:57:02,845 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:57:02,845 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:57:02,845 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:57:02,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:57:02,845 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:57:02,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:57:02,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:57:02,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:57:02,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:57:02,846 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:57:02,846 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:57:02,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:57:02,846 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:57:02,846 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:57:02,847 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:57:02,847 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:57:02,847 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ab20fd2c170582703dc94cfdcd8e10a79137aac9ab76b1936884b512261ae10 [2021-12-15 09:57:03,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:57:03,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:57:03,044 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:57:03,045 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:57:03,046 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:57:03,047 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label05.c [2021-12-15 09:57:03,088 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10e816489/007f670a2b5945cf86c3cea3376a6cd5/FLAG33178b283 [2021-12-15 09:57:03,591 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:57:03,592 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label05.c [2021-12-15 09:57:03,608 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10e816489/007f670a2b5945cf86c3cea3376a6cd5/FLAG33178b283 [2021-12-15 09:57:03,859 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10e816489/007f670a2b5945cf86c3cea3376a6cd5 [2021-12-15 09:57:03,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:57:03,861 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:57:03,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:57:03,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:57:03,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:57:03,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:57:03" (1/1) ... [2021-12-15 09:57:03,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61daa954 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:03, skipping insertion in model container [2021-12-15 09:57:03,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:57:03" (1/1) ... [2021-12-15 09:57:03,871 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:57:03,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:57:04,108 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/Problem17_label05.c[9078,9091] [2021-12-15 09:57:04,516 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:57:04,522 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:57:04,549 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/Problem17_label05.c[9078,9091] [2021-12-15 09:57:04,723 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:57:04,736 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:57:04,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:04 WrapperNode [2021-12-15 09:57:04,736 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:57:04,737 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:57:04,737 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:57:04,738 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:57:04,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:04" (1/1) ... [2021-12-15 09:57:04,782 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:04" (1/1) ... [2021-12-15 09:57:05,021 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-15 09:57:05,022 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:57:05,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:57:05,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:57:05,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:57:05,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:04" (1/1) ... [2021-12-15 09:57:05,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:04" (1/1) ... [2021-12-15 09:57:05,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:04" (1/1) ... [2021-12-15 09:57:05,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:04" (1/1) ... [2021-12-15 09:57:05,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:04" (1/1) ... [2021-12-15 09:57:05,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:04" (1/1) ... [2021-12-15 09:57:05,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:04" (1/1) ... [2021-12-15 09:57:05,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:57:05,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:57:05,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:57:05,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:57:05,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:04" (1/1) ... [2021-12-15 09:57:05,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:57:05,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:57:05,375 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 09:57:05,381 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 09:57:05,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:57:05,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:57:05,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:57:05,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:57:05,456 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:57:05,457 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:57:07,556 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:57:07,563 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:57:07,563 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:57:07,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:57:07 BoogieIcfgContainer [2021-12-15 09:57:07,565 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:57:07,566 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:57:07,566 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:57:07,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:57:07,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:57:03" (1/3) ... [2021-12-15 09:57:07,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ea91c15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:57:07, skipping insertion in model container [2021-12-15 09:57:07,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:04" (2/3) ... [2021-12-15 09:57:07,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ea91c15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:57:07, skipping insertion in model container [2021-12-15 09:57:07,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:57:07" (3/3) ... [2021-12-15 09:57:07,570 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label05.c [2021-12-15 09:57:07,574 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:57:07,574 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:57:07,604 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:57:07,608 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 09:57:07,608 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:57:07,624 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 09:57:07,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-15 09:57:07,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:07,630 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:57:07,630 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:07,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:07,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1818267785, now seen corresponding path program 1 times [2021-12-15 09:57:07,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:07,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865020364] [2021-12-15 09:57:07,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:07,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:07,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:07,847 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 09:57:07,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:07,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865020364] [2021-12-15 09:57:07,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865020364] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:57:07,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:57:07,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:57:07,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230180338] [2021-12-15 09:57:07,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:07,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:57:07,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:07,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:57:07,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:07,883 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 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 09:57:10,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:10,273 INFO L93 Difference]: Finished difference Result 1667 states and 3061 transitions. [2021-12-15 09:57:10,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:57:10,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2021-12-15 09:57:10,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:10,288 INFO L225 Difference]: With dead ends: 1667 [2021-12-15 09:57:10,288 INFO L226 Difference]: Without dead ends: 998 [2021-12-15 09:57:10,292 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 09:57:10,295 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 484 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:10,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 276 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:57:10,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-12-15 09:57:10,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 982. [2021-12-15 09:57:10,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 1.707441386340469) internal successors, (1675), 981 states have internal predecessors, (1675), 0 states have call successors, (0), 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 09:57:10,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1675 transitions. [2021-12-15 09:57:10,357 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1675 transitions. Word has length 61 [2021-12-15 09:57:10,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:10,357 INFO L470 AbstractCegarLoop]: Abstraction has 982 states and 1675 transitions. [2021-12-15 09:57:10,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 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 09:57:10,358 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1675 transitions. [2021-12-15 09:57:10,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-15 09:57:10,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:10,363 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, 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] [2021-12-15 09:57:10,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:57:10,363 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:10,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:10,364 INFO L85 PathProgramCache]: Analyzing trace with hash 406045933, now seen corresponding path program 1 times [2021-12-15 09:57:10,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:10,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805038694] [2021-12-15 09:57:10,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:10,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:10,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:57:10,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:10,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805038694] [2021-12-15 09:57:10,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805038694] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:57:10,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:57:10,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:57:10,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696225914] [2021-12-15 09:57:10,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:10,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:57:10,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:10,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:57:10,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:10,507 INFO L87 Difference]: Start difference. First operand 982 states and 1675 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 0 states have call successors, (0), 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 09:57:12,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:12,393 INFO L93 Difference]: Finished difference Result 2841 states and 4881 transitions. [2021-12-15 09:57:12,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:57:12,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2021-12-15 09:57:12,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:12,400 INFO L225 Difference]: With dead ends: 2841 [2021-12-15 09:57:12,400 INFO L226 Difference]: Without dead ends: 1861 [2021-12-15 09:57:12,401 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 09:57:12,402 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 407 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:12,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 496 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 09:57:12,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-12-15 09:57:12,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1857. [2021-12-15 09:57:12,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 1.4547413793103448) internal successors, (2700), 1856 states have internal predecessors, (2700), 0 states have call successors, (0), 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 09:57:12,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2700 transitions. [2021-12-15 09:57:12,433 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2700 transitions. Word has length 126 [2021-12-15 09:57:12,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:12,434 INFO L470 AbstractCegarLoop]: Abstraction has 1857 states and 2700 transitions. [2021-12-15 09:57:12,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 0 states have call successors, (0), 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 09:57:12,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2700 transitions. [2021-12-15 09:57:12,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-15 09:57:12,437 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:12,438 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, 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] [2021-12-15 09:57:12,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:57:12,438 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:12,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:12,439 INFO L85 PathProgramCache]: Analyzing trace with hash 766407448, now seen corresponding path program 1 times [2021-12-15 09:57:12,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:12,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82726924] [2021-12-15 09:57:12,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:12,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:57:12,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:12,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82726924] [2021-12-15 09:57:12,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82726924] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:57:12,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:57:12,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:57:12,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380378724] [2021-12-15 09:57:12,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:12,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:57:12,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:12,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:57:12,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:12,584 INFO L87 Difference]: Start difference. First operand 1857 states and 2700 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 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 09:57:14,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:14,682 INFO L93 Difference]: Finished difference Result 4591 states and 6640 transitions. [2021-12-15 09:57:14,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:57:14,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 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 166 [2021-12-15 09:57:14,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:14,691 INFO L225 Difference]: With dead ends: 4591 [2021-12-15 09:57:14,691 INFO L226 Difference]: Without dead ends: 2736 [2021-12-15 09:57:14,694 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 09:57:14,698 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 352 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:14,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 537 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 09:57:14,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-12-15 09:57:14,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2716. [2021-12-15 09:57:14,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2715 states have (on average 1.390791896869245) internal successors, (3776), 2715 states have internal predecessors, (3776), 0 states have call successors, (0), 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 09:57:14,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 3776 transitions. [2021-12-15 09:57:14,735 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 3776 transitions. Word has length 166 [2021-12-15 09:57:14,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:14,737 INFO L470 AbstractCegarLoop]: Abstraction has 2716 states and 3776 transitions. [2021-12-15 09:57:14,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 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 09:57:14,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 3776 transitions. [2021-12-15 09:57:14,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-15 09:57:14,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:14,742 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, 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] [2021-12-15 09:57:14,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:57:14,743 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:14,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:14,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1753011417, now seen corresponding path program 1 times [2021-12-15 09:57:14,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:14,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787972104] [2021-12-15 09:57:14,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:14,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:14,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:14,897 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:57:14,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:14,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787972104] [2021-12-15 09:57:14,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787972104] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:57:14,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:57:14,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:57:14,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090854125] [2021-12-15 09:57:14,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:14,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:57:14,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:14,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:57:14,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:57:14,900 INFO L87 Difference]: Start difference. First operand 2716 states and 3776 transitions. Second operand has 4 states, 4 states have (on average 43.0) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 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 09:57:16,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:16,632 INFO L93 Difference]: Finished difference Result 5012 states and 6951 transitions. [2021-12-15 09:57:16,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 09:57:16,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.0) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 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 172 [2021-12-15 09:57:16,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:16,639 INFO L225 Difference]: With dead ends: 5012 [2021-12-15 09:57:16,639 INFO L226 Difference]: Without dead ends: 2298 [2021-12-15 09:57:16,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:57:16,643 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 746 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 1623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:16,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 935 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 1623 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 09:57:16,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-12-15 09:57:16,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2282. [2021-12-15 09:57:16,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2282 states, 2281 states have (on average 1.3726435773783427) internal successors, (3131), 2281 states have internal predecessors, (3131), 0 states have call successors, (0), 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 09:57:16,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 3131 transitions. [2021-12-15 09:57:16,673 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 3131 transitions. Word has length 172 [2021-12-15 09:57:16,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:16,674 INFO L470 AbstractCegarLoop]: Abstraction has 2282 states and 3131 transitions. [2021-12-15 09:57:16,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.0) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 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 09:57:16,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 3131 transitions. [2021-12-15 09:57:16,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-15 09:57:16,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:16,676 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, 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] [2021-12-15 09:57:16,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:57:16,676 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:16,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:16,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1867106746, now seen corresponding path program 1 times [2021-12-15 09:57:16,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:16,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039097612] [2021-12-15 09:57:16,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:16,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:16,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:16,796 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 117 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 09:57:16,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:16,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039097612] [2021-12-15 09:57:16,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039097612] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:57:16,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737860594] [2021-12-15 09:57:16,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:16,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:57:16,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:57:16,813 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 09:57:16,841 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 09:57:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:16,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:57:16,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:57:17,198 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-15 09:57:17,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:57:17,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737860594] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:57:17,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:57:17,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-15 09:57:17,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171840378] [2021-12-15 09:57:17,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:17,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:57:17,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:17,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:57:17,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:57:17,200 INFO L87 Difference]: Start difference. First operand 2282 states and 3131 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 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 09:57:18,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:18,903 INFO L93 Difference]: Finished difference Result 5859 states and 8337 transitions. [2021-12-15 09:57:18,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:57:18,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 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 196 [2021-12-15 09:57:18,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:18,914 INFO L225 Difference]: With dead ends: 5859 [2021-12-15 09:57:18,914 INFO L226 Difference]: Without dead ends: 4004 [2021-12-15 09:57:18,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:57:18,917 INFO L933 BasicCegarLoop]: 807 mSDtfsCounter, 445 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 1677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:18,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 875 Invalid, 1677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 09:57:18,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4004 states. [2021-12-15 09:57:18,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4004 to 4002. [2021-12-15 09:57:18,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4002 states, 4001 states have (on average 1.287928017995501) internal successors, (5153), 4001 states have internal predecessors, (5153), 0 states have call successors, (0), 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 09:57:18,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4002 states to 4002 states and 5153 transitions. [2021-12-15 09:57:18,964 INFO L78 Accepts]: Start accepts. Automaton has 4002 states and 5153 transitions. Word has length 196 [2021-12-15 09:57:18,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:18,965 INFO L470 AbstractCegarLoop]: Abstraction has 4002 states and 5153 transitions. [2021-12-15 09:57:18,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 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 09:57:18,965 INFO L276 IsEmpty]: Start isEmpty. Operand 4002 states and 5153 transitions. [2021-12-15 09:57:18,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-12-15 09:57:18,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:18,967 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, 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:57:19,001 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 09:57:19,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:57:19,184 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:19,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:19,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1290996375, now seen corresponding path program 1 times [2021-12-15 09:57:19,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:19,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25432941] [2021-12-15 09:57:19,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:19,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-15 09:57:19,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:19,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25432941] [2021-12-15 09:57:19,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25432941] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:57:19,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:57:19,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:57:19,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068858198] [2021-12-15 09:57:19,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:19,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:57:19,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:19,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:57:19,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:19,265 INFO L87 Difference]: Start difference. First operand 4002 states and 5153 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 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 09:57:20,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:20,869 INFO L93 Difference]: Finished difference Result 10561 states and 13902 transitions. [2021-12-15 09:57:20,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:57:20,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 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 202 [2021-12-15 09:57:20,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:20,883 INFO L225 Difference]: With dead ends: 10561 [2021-12-15 09:57:20,883 INFO L226 Difference]: Without dead ends: 5707 [2021-12-15 09:57:20,888 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 09:57:20,891 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:20,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 590 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 09:57:20,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5707 states. [2021-12-15 09:57:20,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5707 to 4854. [2021-12-15 09:57:20,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4854 states, 4853 states have (on average 1.1821553678137235) internal successors, (5737), 4853 states have internal predecessors, (5737), 0 states have call successors, (0), 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 09:57:20,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4854 states to 4854 states and 5737 transitions. [2021-12-15 09:57:20,950 INFO L78 Accepts]: Start accepts. Automaton has 4854 states and 5737 transitions. Word has length 202 [2021-12-15 09:57:20,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:20,950 INFO L470 AbstractCegarLoop]: Abstraction has 4854 states and 5737 transitions. [2021-12-15 09:57:20,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 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 09:57:20,951 INFO L276 IsEmpty]: Start isEmpty. Operand 4854 states and 5737 transitions. [2021-12-15 09:57:20,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-15 09:57:20,953 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:20,953 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:57:20,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:57:20,953 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:20,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:20,954 INFO L85 PathProgramCache]: Analyzing trace with hash 242083083, now seen corresponding path program 1 times [2021-12-15 09:57:20,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:20,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418769650] [2021-12-15 09:57:20,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:20,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:20,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:21,024 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 09:57:21,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:21,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418769650] [2021-12-15 09:57:21,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418769650] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:57:21,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:57:21,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:57:21,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760139524] [2021-12-15 09:57:21,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:21,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:57:21,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:21,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:57:21,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:21,028 INFO L87 Difference]: Start difference. First operand 4854 states and 5737 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 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 09:57:22,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:22,653 INFO L93 Difference]: Finished difference Result 12252 states and 14649 transitions. [2021-12-15 09:57:22,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:57:22,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 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 215 [2021-12-15 09:57:22,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:22,671 INFO L225 Difference]: With dead ends: 12252 [2021-12-15 09:57:22,671 INFO L226 Difference]: Without dead ends: 7399 [2021-12-15 09:57:22,676 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 09:57:22,677 INFO L933 BasicCegarLoop]: 393 mSDtfsCounter, 385 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:22,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 455 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 09:57:22,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7399 states. [2021-12-15 09:57:22,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7399 to 4824. [2021-12-15 09:57:22,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4824 states, 4823 states have (on average 1.180178312253784) internal successors, (5692), 4823 states have internal predecessors, (5692), 0 states have call successors, (0), 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 09:57:22,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4824 states to 4824 states and 5692 transitions. [2021-12-15 09:57:22,762 INFO L78 Accepts]: Start accepts. Automaton has 4824 states and 5692 transitions. Word has length 215 [2021-12-15 09:57:22,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:22,762 INFO L470 AbstractCegarLoop]: Abstraction has 4824 states and 5692 transitions. [2021-12-15 09:57:22,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 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 09:57:22,762 INFO L276 IsEmpty]: Start isEmpty. Operand 4824 states and 5692 transitions. [2021-12-15 09:57:22,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-12-15 09:57:22,764 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:22,765 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, 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:57:22,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:57:22,765 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:22,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:22,766 INFO L85 PathProgramCache]: Analyzing trace with hash 299430930, now seen corresponding path program 1 times [2021-12-15 09:57:22,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:22,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464068044] [2021-12-15 09:57:22,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:22,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:22,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:22,853 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-15 09:57:22,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:22,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464068044] [2021-12-15 09:57:22,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464068044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:57:22,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:57:22,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:57:22,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190609621] [2021-12-15 09:57:22,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:22,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:57:22,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:22,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:57:22,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:22,855 INFO L87 Difference]: Start difference. First operand 4824 states and 5692 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 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 09:57:24,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:24,226 INFO L93 Difference]: Finished difference Result 12626 states and 15138 transitions. [2021-12-15 09:57:24,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:57:24,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 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 226 [2021-12-15 09:57:24,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:24,243 INFO L225 Difference]: With dead ends: 12626 [2021-12-15 09:57:24,244 INFO L226 Difference]: Without dead ends: 7804 [2021-12-15 09:57:24,249 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 09:57:24,250 INFO L933 BasicCegarLoop]: 714 mSDtfsCounter, 480 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 1436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:24,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 767 Invalid, 1436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 09:57:24,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7804 states. [2021-12-15 09:57:24,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7804 to 7804. [2021-12-15 09:57:24,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7804 states, 7803 states have (on average 1.1612200435729847) internal successors, (9061), 7803 states have internal predecessors, (9061), 0 states have call successors, (0), 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 09:57:24,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7804 states to 7804 states and 9061 transitions. [2021-12-15 09:57:24,328 INFO L78 Accepts]: Start accepts. Automaton has 7804 states and 9061 transitions. Word has length 226 [2021-12-15 09:57:24,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:24,328 INFO L470 AbstractCegarLoop]: Abstraction has 7804 states and 9061 transitions. [2021-12-15 09:57:24,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 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 09:57:24,329 INFO L276 IsEmpty]: Start isEmpty. Operand 7804 states and 9061 transitions. [2021-12-15 09:57:24,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-12-15 09:57:24,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:24,331 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:57:24,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:57:24,332 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:24,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:24,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1296606725, now seen corresponding path program 1 times [2021-12-15 09:57:24,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:24,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412887268] [2021-12-15 09:57:24,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:24,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:24,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:24,403 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-15 09:57:24,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:24,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412887268] [2021-12-15 09:57:24,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412887268] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:57:24,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:57:24,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:57:24,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128272012] [2021-12-15 09:57:24,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:24,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:57:24,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:24,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:57:24,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:24,408 INFO L87 Difference]: Start difference. First operand 7804 states and 9061 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 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 09:57:25,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:25,915 INFO L93 Difference]: Finished difference Result 16889 states and 19590 transitions. [2021-12-15 09:57:25,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:57:25,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 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 281 [2021-12-15 09:57:25,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:25,928 INFO L225 Difference]: With dead ends: 16889 [2021-12-15 09:57:25,928 INFO L226 Difference]: Without dead ends: 9087 [2021-12-15 09:57:25,935 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 09:57:25,936 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 375 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:25,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 894 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 09:57:25,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9087 states. [2021-12-15 09:57:26,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9087 to 8656. [2021-12-15 09:57:26,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8656 states, 8655 states have (on average 1.1560947429231658) internal successors, (10006), 8655 states have internal predecessors, (10006), 0 states have call successors, (0), 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 09:57:26,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8656 states to 8656 states and 10006 transitions. [2021-12-15 09:57:26,019 INFO L78 Accepts]: Start accepts. Automaton has 8656 states and 10006 transitions. Word has length 281 [2021-12-15 09:57:26,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:26,019 INFO L470 AbstractCegarLoop]: Abstraction has 8656 states and 10006 transitions. [2021-12-15 09:57:26,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 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 09:57:26,020 INFO L276 IsEmpty]: Start isEmpty. Operand 8656 states and 10006 transitions. [2021-12-15 09:57:26,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-12-15 09:57:26,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:26,023 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:57:26,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:57:26,024 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:26,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:26,024 INFO L85 PathProgramCache]: Analyzing trace with hash -718044374, now seen corresponding path program 1 times [2021-12-15 09:57:26,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:26,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129608740] [2021-12-15 09:57:26,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:26,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-15 09:57:26,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:26,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129608740] [2021-12-15 09:57:26,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129608740] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:57:26,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:57:26,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:57:26,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535445634] [2021-12-15 09:57:26,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:26,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:57:26,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:26,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:57:26,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:26,101 INFO L87 Difference]: Start difference. First operand 8656 states and 10006 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 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 09:57:27,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:27,575 INFO L93 Difference]: Finished difference Result 21136 states and 24704 transitions. [2021-12-15 09:57:27,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:57:27,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 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 298 [2021-12-15 09:57:27,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:27,597 INFO L225 Difference]: With dead ends: 21136 [2021-12-15 09:57:27,597 INFO L226 Difference]: Without dead ends: 12057 [2021-12-15 09:57:27,605 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 09:57:27,605 INFO L933 BasicCegarLoop]: 770 mSDtfsCounter, 384 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:27,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 838 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 09:57:27,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12057 states. [2021-12-15 09:57:27,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12057 to 12057. [2021-12-15 09:57:27,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12057 states, 12056 states have (on average 1.1279031187790312) internal successors, (13598), 12056 states have internal predecessors, (13598), 0 states have call successors, (0), 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 09:57:27,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12057 states to 12057 states and 13598 transitions. [2021-12-15 09:57:27,711 INFO L78 Accepts]: Start accepts. Automaton has 12057 states and 13598 transitions. Word has length 298 [2021-12-15 09:57:27,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:27,712 INFO L470 AbstractCegarLoop]: Abstraction has 12057 states and 13598 transitions. [2021-12-15 09:57:27,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 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 09:57:27,712 INFO L276 IsEmpty]: Start isEmpty. Operand 12057 states and 13598 transitions. [2021-12-15 09:57:27,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-12-15 09:57:27,716 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:27,717 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, 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, 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 09:57:27,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:57:27,717 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:27,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:27,718 INFO L85 PathProgramCache]: Analyzing trace with hash 19861535, now seen corresponding path program 1 times [2021-12-15 09:57:27,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:27,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140468987] [2021-12-15 09:57:27,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:27,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-15 09:57:27,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:27,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140468987] [2021-12-15 09:57:27,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140468987] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:57:27,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:57:27,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:57:27,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086965239] [2021-12-15 09:57:27,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:27,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:57:27,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:27,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:57:27,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:57:27,883 INFO L87 Difference]: Start difference. First operand 12057 states and 13598 transitions. Second operand has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 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 09:57:30,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:30,698 INFO L93 Difference]: Finished difference Result 37801 states and 42753 transitions. [2021-12-15 09:57:30,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:57:30,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 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 321 [2021-12-15 09:57:30,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:30,727 INFO L225 Difference]: With dead ends: 37801 [2021-12-15 09:57:30,727 INFO L226 Difference]: Without dead ends: 24037 [2021-12-15 09:57:30,739 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 09:57:30,740 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 868 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 2642 mSolverCounterSat, 510 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 3152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 510 IncrementalHoareTripleChecker+Valid, 2642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:30,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [868 Valid, 258 Invalid, 3152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [510 Valid, 2642 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 09:57:30,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24037 states. [2021-12-15 09:57:30,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24037 to 23147. [2021-12-15 09:57:30,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23147 states, 23146 states have (on average 1.1220945303724186) internal successors, (25972), 23146 states have internal predecessors, (25972), 0 states have call successors, (0), 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 09:57:30,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23147 states to 23147 states and 25972 transitions. [2021-12-15 09:57:30,954 INFO L78 Accepts]: Start accepts. Automaton has 23147 states and 25972 transitions. Word has length 321 [2021-12-15 09:57:30,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:30,955 INFO L470 AbstractCegarLoop]: Abstraction has 23147 states and 25972 transitions. [2021-12-15 09:57:30,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 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 09:57:30,955 INFO L276 IsEmpty]: Start isEmpty. Operand 23147 states and 25972 transitions. [2021-12-15 09:57:30,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2021-12-15 09:57:30,960 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:30,960 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, 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, 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 09:57:30,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 09:57:30,961 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:30,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:30,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1548731972, now seen corresponding path program 1 times [2021-12-15 09:57:30,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:30,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275236901] [2021-12-15 09:57:30,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:30,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:31,037 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-12-15 09:57:31,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:31,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275236901] [2021-12-15 09:57:31,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275236901] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:57:31,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:57:31,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:57:31,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848146254] [2021-12-15 09:57:31,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:31,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:57:31,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:31,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:57:31,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:31,039 INFO L87 Difference]: Start difference. First operand 23147 states and 25972 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 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 09:57:32,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:32,704 INFO L93 Difference]: Finished difference Result 56922 states and 64235 transitions. [2021-12-15 09:57:32,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:57:32,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 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 333 [2021-12-15 09:57:32,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:32,740 INFO L225 Difference]: With dead ends: 56922 [2021-12-15 09:57:32,741 INFO L226 Difference]: Without dead ends: 33352 [2021-12-15 09:57:32,760 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 09:57:32,761 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 430 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:32,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 375 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1232 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 09:57:32,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33352 states. [2021-12-15 09:57:32,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33352 to 29517. [2021-12-15 09:57:33,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29517 states, 29516 states have (on average 1.1167841170890365) internal successors, (32963), 29516 states have internal predecessors, (32963), 0 states have call successors, (0), 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 09:57:33,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29517 states to 29517 states and 32963 transitions. [2021-12-15 09:57:33,038 INFO L78 Accepts]: Start accepts. Automaton has 29517 states and 32963 transitions. Word has length 333 [2021-12-15 09:57:33,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:33,039 INFO L470 AbstractCegarLoop]: Abstraction has 29517 states and 32963 transitions. [2021-12-15 09:57:33,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 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 09:57:33,039 INFO L276 IsEmpty]: Start isEmpty. Operand 29517 states and 32963 transitions. [2021-12-15 09:57:33,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2021-12-15 09:57:33,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:33,047 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, 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, 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] [2021-12-15 09:57:33,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 09:57:33,048 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:33,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:33,048 INFO L85 PathProgramCache]: Analyzing trace with hash -382745382, now seen corresponding path program 1 times [2021-12-15 09:57:33,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:33,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432776357] [2021-12-15 09:57:33,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:33,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:33,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-12-15 09:57:33,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:33,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432776357] [2021-12-15 09:57:33,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432776357] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:57:33,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:57:33,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:57:33,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022390307] [2021-12-15 09:57:33,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:33,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:57:33,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:33,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:57:33,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:33,158 INFO L87 Difference]: Start difference. First operand 29517 states and 32963 transitions. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 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 09:57:34,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:34,497 INFO L93 Difference]: Finished difference Result 59029 states and 65921 transitions. [2021-12-15 09:57:34,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:57:34,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 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 09:57:34,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:34,532 INFO L225 Difference]: With dead ends: 59029 [2021-12-15 09:57:34,533 INFO L226 Difference]: Without dead ends: 29513 [2021-12-15 09:57:34,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 09:57:34,554 INFO L933 BasicCegarLoop]: 555 mSDtfsCounter, 571 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:34,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 582 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1188 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-15 09:57:34,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29513 states. [2021-12-15 09:57:34,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29513 to 29513. [2021-12-15 09:57:34,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29513 states, 29512 states have (on average 1.1155123339658444) internal successors, (32921), 29512 states have internal predecessors, (32921), 0 states have call successors, (0), 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 09:57:34,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29513 states to 29513 states and 32921 transitions. [2021-12-15 09:57:34,835 INFO L78 Accepts]: Start accepts. Automaton has 29513 states and 32921 transitions. Word has length 394 [2021-12-15 09:57:34,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:34,836 INFO L470 AbstractCegarLoop]: Abstraction has 29513 states and 32921 transitions. [2021-12-15 09:57:34,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 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 09:57:34,836 INFO L276 IsEmpty]: Start isEmpty. Operand 29513 states and 32921 transitions. [2021-12-15 09:57:34,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2021-12-15 09:57:34,844 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:34,844 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, 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, 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, 1, 1, 1, 1, 1] [2021-12-15 09:57:34,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 09:57:34,845 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:34,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:34,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1350512806, now seen corresponding path program 1 times [2021-12-15 09:57:34,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:34,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105118439] [2021-12-15 09:57:34,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:34,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:34,959 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 260 proven. 82 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-15 09:57:34,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:34,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105118439] [2021-12-15 09:57:34,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105118439] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:57:34,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476746818] [2021-12-15 09:57:34,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:34,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:57:34,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:57:34,976 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 09:57:35,015 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 09:57:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:35,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 09:57:35,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:57:35,944 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 248 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:57:35,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:57:36,746 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 401 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:57:36,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476746818] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 09:57:36,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-15 09:57:36,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 4] total 7 [2021-12-15 09:57:36,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813264839] [2021-12-15 09:57:36,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:36,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 09:57:36,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:36,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 09:57:36,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-15 09:57:36,748 INFO L87 Difference]: Start difference. First operand 29513 states and 32921 transitions. Second operand has 5 states, 5 states have (on average 80.4) internal successors, (402), 4 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 09:57:40,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:40,130 INFO L93 Difference]: Finished difference Result 91835 states and 103297 transitions. [2021-12-15 09:57:40,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 09:57:40,131 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 80.4) internal successors, (402), 4 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 402 [2021-12-15 09:57:40,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:40,196 INFO L225 Difference]: With dead ends: 91835 [2021-12-15 09:57:40,197 INFO L226 Difference]: Without dead ends: 61042 [2021-12-15 09:57:40,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 805 GetRequests, 797 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-15 09:57:40,224 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 1339 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 3259 mSolverCounterSat, 861 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1339 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 4120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 861 IncrementalHoareTripleChecker+Valid, 3259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:40,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1339 Valid, 219 Invalid, 4120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [861 Valid, 3259 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 09:57:40,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61042 states. [2021-12-15 09:57:40,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61042 to 60177. [2021-12-15 09:57:40,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60177 states, 60176 states have (on average 1.1105257910130284) internal successors, (66827), 60176 states have internal predecessors, (66827), 0 states have call successors, (0), 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 09:57:40,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60177 states to 60177 states and 66827 transitions. [2021-12-15 09:57:40,948 INFO L78 Accepts]: Start accepts. Automaton has 60177 states and 66827 transitions. Word has length 402 [2021-12-15 09:57:40,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:40,949 INFO L470 AbstractCegarLoop]: Abstraction has 60177 states and 66827 transitions. [2021-12-15 09:57:40,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.4) internal successors, (402), 4 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 09:57:40,949 INFO L276 IsEmpty]: Start isEmpty. Operand 60177 states and 66827 transitions. [2021-12-15 09:57:40,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2021-12-15 09:57:40,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:40,957 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, 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, 3, 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] [2021-12-15 09:57:40,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 09:57:41,174 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,SelfDestructingSolverStorable13 [2021-12-15 09:57:41,174 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:41,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:41,175 INFO L85 PathProgramCache]: Analyzing trace with hash 730144691, now seen corresponding path program 1 times [2021-12-15 09:57:41,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:41,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223879950] [2021-12-15 09:57:41,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:41,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:41,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:41,303 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 602 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-12-15 09:57:41,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:41,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223879950] [2021-12-15 09:57:41,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223879950] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:57:41,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:57:41,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:57:41,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28758974] [2021-12-15 09:57:41,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:41,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:57:41,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:41,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:57:41,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:41,305 INFO L87 Difference]: Start difference. First operand 60177 states and 66827 transitions. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 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 09:57:43,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:43,469 INFO L93 Difference]: Finished difference Result 131007 states and 145462 transitions. [2021-12-15 09:57:43,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:57:43,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 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 430 [2021-12-15 09:57:43,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:43,546 INFO L225 Difference]: With dead ends: 131007 [2021-12-15 09:57:43,546 INFO L226 Difference]: Without dead ends: 70832 [2021-12-15 09:57:43,566 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 09:57:43,567 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 427 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:43,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 303 Invalid, 1501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 09:57:43,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70832 states. [2021-12-15 09:57:44,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70832 to 66144. [2021-12-15 09:57:44,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66144 states, 66143 states have (on average 1.1102308634322604) internal successors, (73434), 66143 states have internal predecessors, (73434), 0 states have call successors, (0), 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 09:57:44,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66144 states to 66144 states and 73434 transitions. [2021-12-15 09:57:44,287 INFO L78 Accepts]: Start accepts. Automaton has 66144 states and 73434 transitions. Word has length 430 [2021-12-15 09:57:44,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:44,288 INFO L470 AbstractCegarLoop]: Abstraction has 66144 states and 73434 transitions. [2021-12-15 09:57:44,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 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 09:57:44,288 INFO L276 IsEmpty]: Start isEmpty. Operand 66144 states and 73434 transitions. [2021-12-15 09:57:44,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2021-12-15 09:57:44,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:44,296 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, 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, 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] [2021-12-15 09:57:44,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 09:57:44,296 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:44,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:44,297 INFO L85 PathProgramCache]: Analyzing trace with hash 366078561, now seen corresponding path program 1 times [2021-12-15 09:57:44,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:44,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406315079] [2021-12-15 09:57:44,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:44,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:44,412 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 391 proven. 59 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-12-15 09:57:44,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:44,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406315079] [2021-12-15 09:57:44,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406315079] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:57:44,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869516419] [2021-12-15 09:57:44,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:44,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:57:44,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:57:44,414 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 09:57:44,415 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 09:57:44,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:44,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 09:57:44,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:57:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 447 proven. 82 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-15 09:57:45,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:57:46,518 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 447 proven. 82 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-15 09:57:46,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869516419] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 09:57:46,518 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 09:57:46,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2021-12-15 09:57:46,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505193395] [2021-12-15 09:57:46,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 09:57:46,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 09:57:46,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:46,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 09:57:46,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-15 09:57:46,520 INFO L87 Difference]: Start difference. First operand 66144 states and 73434 transitions. Second operand has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 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 09:57:57,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:57:57,327 INFO L93 Difference]: Finished difference Result 190171 states and 209132 transitions. [2021-12-15 09:57:57,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-15 09:57:57,327 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 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 441 [2021-12-15 09:57:57,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:57:57,484 INFO L225 Difference]: With dead ends: 190171 [2021-12-15 09:57:57,485 INFO L226 Difference]: Without dead ends: 117646 [2021-12-15 09:57:57,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 915 GetRequests, 893 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-12-15 09:57:57,515 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 9574 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 14696 mSolverCounterSat, 2425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9574 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 17121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2425 IncrementalHoareTripleChecker+Valid, 14696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:57:57,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9574 Valid, 432 Invalid, 17121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2425 Valid, 14696 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2021-12-15 09:57:57,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117646 states. [2021-12-15 09:57:58,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117646 to 95037. [2021-12-15 09:57:58,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95037 states, 95036 states have (on average 1.0774443368828654) internal successors, (102396), 95036 states have internal predecessors, (102396), 0 states have call successors, (0), 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 09:57:59,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95037 states to 95037 states and 102396 transitions. [2021-12-15 09:57:59,000 INFO L78 Accepts]: Start accepts. Automaton has 95037 states and 102396 transitions. Word has length 441 [2021-12-15 09:57:59,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:57:59,001 INFO L470 AbstractCegarLoop]: Abstraction has 95037 states and 102396 transitions. [2021-12-15 09:57:59,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 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 09:57:59,001 INFO L276 IsEmpty]: Start isEmpty. Operand 95037 states and 102396 transitions. [2021-12-15 09:57:59,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2021-12-15 09:57:59,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:57:59,013 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:57:59,045 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 09:57:59,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:57:59,228 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:57:59,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:57:59,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1137453193, now seen corresponding path program 1 times [2021-12-15 09:57:59,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:57:59,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726556554] [2021-12-15 09:57:59,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:57:59,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:57:59,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:57:59,576 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 357 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-15 09:57:59,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:57:59,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726556554] [2021-12-15 09:57:59,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726556554] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:57:59,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:57:59,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:57:59,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934765553] [2021-12-15 09:57:59,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:57:59,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:57:59,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:57:59,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:57:59,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:57:59,579 INFO L87 Difference]: Start difference. First operand 95037 states and 102396 transitions. Second operand has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 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 09:58:01,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:58:01,438 INFO L93 Difference]: Finished difference Result 195628 states and 210876 transitions. [2021-12-15 09:58:01,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:58:01,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 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 557 [2021-12-15 09:58:01,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:58:01,579 INFO L225 Difference]: With dead ends: 195628 [2021-12-15 09:58:01,579 INFO L226 Difference]: Without dead ends: 101017 [2021-12-15 09:58:01,629 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 09:58:01,629 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 422 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:58:01,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 178 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 09:58:01,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101017 states. [2021-12-15 09:58:02,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101017 to 95036. [2021-12-15 09:58:02,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95036 states, 95035 states have (on average 1.074288420055769) internal successors, (102095), 95035 states have internal predecessors, (102095), 0 states have call successors, (0), 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 09:58:02,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95036 states to 95036 states and 102095 transitions. [2021-12-15 09:58:02,979 INFO L78 Accepts]: Start accepts. Automaton has 95036 states and 102095 transitions. Word has length 557 [2021-12-15 09:58:02,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:58:02,980 INFO L470 AbstractCegarLoop]: Abstraction has 95036 states and 102095 transitions. [2021-12-15 09:58:02,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 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 09:58:02,980 INFO L276 IsEmpty]: Start isEmpty. Operand 95036 states and 102095 transitions. [2021-12-15 09:58:02,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 629 [2021-12-15 09:58:02,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:58:02,996 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, 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, 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, 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] [2021-12-15 09:58:02,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 09:58:02,996 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:58:02,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:58:02,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1686632968, now seen corresponding path program 1 times [2021-12-15 09:58:02,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:58:02,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612576328] [2021-12-15 09:58:02,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:58:02,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:58:03,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:58:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 648 proven. 0 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2021-12-15 09:58:03,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:58:03,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612576328] [2021-12-15 09:58:03,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612576328] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:58:03,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:58:03,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:58:03,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74401876] [2021-12-15 09:58:03,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:58:03,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:58:03,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:58:03,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:58:03,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:58:03,298 INFO L87 Difference]: Start difference. First operand 95036 states and 102095 transitions. Second operand has 4 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 0 states have call successors, (0), 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 09:58:06,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:58:06,220 INFO L93 Difference]: Finished difference Result 207977 states and 222890 transitions. [2021-12-15 09:58:06,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:58:06,221 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 0 states have call successors, (0), 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 628 [2021-12-15 09:58:06,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:58:06,347 INFO L225 Difference]: With dead ends: 207977 [2021-12-15 09:58:06,347 INFO L226 Difference]: Without dead ends: 112943 [2021-12-15 09:58:06,370 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 09:58:06,371 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 805 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 2528 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 2903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 2528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:58:06,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [805 Valid, 167 Invalid, 2903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 2528 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 09:58:06,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112943 states. [2021-12-15 09:58:07,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112943 to 102269. [2021-12-15 09:58:07,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102269 states, 102268 states have (on average 1.0726620252669457) internal successors, (109699), 102268 states have internal predecessors, (109699), 0 states have call successors, (0), 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 09:58:07,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102269 states to 102269 states and 109699 transitions. [2021-12-15 09:58:07,823 INFO L78 Accepts]: Start accepts. Automaton has 102269 states and 109699 transitions. Word has length 628 [2021-12-15 09:58:07,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:58:07,824 INFO L470 AbstractCegarLoop]: Abstraction has 102269 states and 109699 transitions. [2021-12-15 09:58:07,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 0 states have call successors, (0), 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 09:58:07,824 INFO L276 IsEmpty]: Start isEmpty. Operand 102269 states and 109699 transitions. [2021-12-15 09:58:07,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 717 [2021-12-15 09:58:07,849 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:58:07,850 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:58:07,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 09:58:07,850 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:58:07,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:58:07,851 INFO L85 PathProgramCache]: Analyzing trace with hash 363021260, now seen corresponding path program 1 times [2021-12-15 09:58:07,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:58:07,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750920831] [2021-12-15 09:58:07,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:58:07,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:58:07,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:58:08,058 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 487 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-15 09:58:08,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:58:08,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750920831] [2021-12-15 09:58:08,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750920831] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:58:08,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:58:08,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:58:08,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281080755] [2021-12-15 09:58:08,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:58:08,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:58:08,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:58:08,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:58:08,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:58:08,062 INFO L87 Difference]: Start difference. First operand 102269 states and 109699 transitions. Second operand has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)