./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem12_label44.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/Problem12_label44.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 4590079a5f8946ec9488ef76281079c2cb860e2f88ad1b21eefdd23ad59a57f9 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:40:31,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:40:31,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:40:31,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:40:31,783 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:40:31,784 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:40:31,785 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:40:31,787 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:40:31,788 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:40:31,789 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:40:31,790 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:40:31,791 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:40:31,791 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:40:31,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:40:31,793 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:40:31,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:40:31,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:40:31,803 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:40:31,804 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:40:31,806 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:40:31,807 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:40:31,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:40:31,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:40:31,813 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:40:31,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:40:31,819 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:40:31,819 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:40:31,820 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:40:31,822 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:40:31,823 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:40:31,823 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:40:31,824 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:40:31,825 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:40:31,826 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:40:31,827 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:40:31,828 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:40:31,829 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:40:31,829 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:40:31,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:40:31,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:40:31,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:40:31,831 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:40:31,860 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:40:31,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:40:31,861 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:40:31,861 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:40:31,862 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:40:31,863 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:40:31,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:40:31,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:40:31,864 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:40:31,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:40:31,865 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:40:31,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:40:31,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:40:31,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:40:31,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:40:31,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:40:31,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:40:31,866 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:40:31,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:40:31,867 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:40:31,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:40:31,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:40:31,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:40:31,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:40:31,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:40:31,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:40:31,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:40:31,868 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:40:31,868 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:40:31,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:40:31,869 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:40:31,869 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:40:31,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:40:31,869 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:40:31,870 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4590079a5f8946ec9488ef76281079c2cb860e2f88ad1b21eefdd23ad59a57f9 [2021-12-15 09:40:32,100 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:40:32,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:40:32,120 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:40:32,121 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:40:32,122 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:40:32,123 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label44.c [2021-12-15 09:40:32,173 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/648b15a59/7966bd01bf7846e0a6b9be53276ff278/FLAG0ffbe0fa5 [2021-12-15 09:40:32,843 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:40:32,844 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label44.c [2021-12-15 09:40:32,880 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/648b15a59/7966bd01bf7846e0a6b9be53276ff278/FLAG0ffbe0fa5 [2021-12-15 09:40:33,145 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/648b15a59/7966bd01bf7846e0a6b9be53276ff278 [2021-12-15 09:40:33,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:40:33,149 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:40:33,152 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:40:33,153 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:40:33,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:40:33,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:40:33" (1/1) ... [2021-12-15 09:40:33,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@634aad03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:33, skipping insertion in model container [2021-12-15 09:40:33,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:40:33" (1/1) ... [2021-12-15 09:40:33,164 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:40:33,254 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:40:33,448 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/Problem12_label44.c[6250,6263] [2021-12-15 09:40:34,172 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:40:34,180 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:40:34,208 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/Problem12_label44.c[6250,6263] [2021-12-15 09:40:34,564 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:40:34,583 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:40:34,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:34 WrapperNode [2021-12-15 09:40:34,585 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:40:34,586 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:40:34,586 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:40:34,586 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:40:34,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:34" (1/1) ... [2021-12-15 09:40:34,630 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:34" (1/1) ... [2021-12-15 09:40:34,912 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2021-12-15 09:40:34,912 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:40:34,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:40:34,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:40:34,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:40:34,921 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:34" (1/1) ... [2021-12-15 09:40:34,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:34" (1/1) ... [2021-12-15 09:40:34,974 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:34" (1/1) ... [2021-12-15 09:40:34,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:34" (1/1) ... [2021-12-15 09:40:35,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:34" (1/1) ... [2021-12-15 09:40:35,214 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:34" (1/1) ... [2021-12-15 09:40:35,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:34" (1/1) ... [2021-12-15 09:40:35,394 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:40:35,395 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:40:35,395 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:40:35,395 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:40:35,396 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:34" (1/1) ... [2021-12-15 09:40:35,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:40:35,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:40:35,473 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 09:40:35,532 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 09:40:35,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:40:35,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:40:35,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:40:35,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:40:35,716 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:40:35,724 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:40:38,898 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:40:38,912 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:40:38,912 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:40:38,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:40:38 BoogieIcfgContainer [2021-12-15 09:40:38,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:40:38,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:40:38,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:40:38,920 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:40:38,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:40:33" (1/3) ... [2021-12-15 09:40:38,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e7aac13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:40:38, skipping insertion in model container [2021-12-15 09:40:38,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:34" (2/3) ... [2021-12-15 09:40:38,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e7aac13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:40:38, skipping insertion in model container [2021-12-15 09:40:38,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:40:38" (3/3) ... [2021-12-15 09:40:38,923 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label44.c [2021-12-15 09:40:38,928 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:40:38,929 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:40:38,978 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:40:38,984 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 09:40:38,985 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:40:39,059 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 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 09:40:39,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-15 09:40:39,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:39,079 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] [2021-12-15 09:40:39,080 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:39,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:39,086 INFO L85 PathProgramCache]: Analyzing trace with hash 761214138, now seen corresponding path program 1 times [2021-12-15 09:40:39,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:39,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50437648] [2021-12-15 09:40:39,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:39,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:39,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:39,346 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 09:40:39,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:39,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50437648] [2021-12-15 09:40:39,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50437648] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:39,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:39,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:40:39,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427280732] [2021-12-15 09:40:39,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:39,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:40:39,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:39,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:40:39,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:39,386 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 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 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 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 09:40:42,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:40:42,703 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2021-12-15 09:40:42,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:40:42,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-12-15 09:40:42,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:40:42,740 INFO L225 Difference]: With dead ends: 2388 [2021-12-15 09:40:42,740 INFO L226 Difference]: Without dead ends: 1506 [2021-12-15 09:40:42,749 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 09:40:42,759 INFO L933 BasicCegarLoop]: 471 mSDtfsCounter, 784 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:40:42,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [784 Valid, 481 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-15 09:40:42,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-12-15 09:40:42,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2021-12-15 09:40:42,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.6385382059800664) internal successors, (2466), 1505 states have internal predecessors, (2466), 0 states have call successors, (0), 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 09:40:42,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2466 transitions. [2021-12-15 09:40:42,863 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2466 transitions. Word has length 50 [2021-12-15 09:40:42,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:40:42,863 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 2466 transitions. [2021-12-15 09:40:42,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 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 09:40:42,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2466 transitions. [2021-12-15 09:40:42,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-15 09:40:42,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:42,868 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, 1, 1, 1, 1, 1, 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 09:40:42,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:40:42,868 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:42,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:42,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1850963095, now seen corresponding path program 1 times [2021-12-15 09:40:42,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:42,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096455304] [2021-12-15 09:40:42,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:42,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:43,087 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:40:43,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:43,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096455304] [2021-12-15 09:40:43,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096455304] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:43,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:43,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:40:43,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40822563] [2021-12-15 09:40:43,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:43,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:40:43,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:43,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:40:43,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:40:43,094 INFO L87 Difference]: Start difference. First operand 1506 states and 2466 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 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 09:40:47,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:40:47,113 INFO L93 Difference]: Finished difference Result 4549 states and 7430 transitions. [2021-12-15 09:40:47,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:40:47,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2021-12-15 09:40:47,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:40:47,126 INFO L225 Difference]: With dead ends: 4549 [2021-12-15 09:40:47,126 INFO L226 Difference]: Without dead ends: 3008 [2021-12-15 09:40:47,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:40:47,130 INFO L933 BasicCegarLoop]: 638 mSDtfsCounter, 690 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 3732 mSolverCounterSat, 664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 4396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 664 IncrementalHoareTripleChecker+Valid, 3732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:40:47,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 656 Invalid, 4396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [664 Valid, 3732 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-12-15 09:40:47,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-12-15 09:40:47,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 3008. [2021-12-15 09:40:47,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 1.341536415031593) internal successors, (4034), 3007 states have internal predecessors, (4034), 0 states have call successors, (0), 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 09:40:47,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4034 transitions. [2021-12-15 09:40:47,190 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4034 transitions. Word has length 121 [2021-12-15 09:40:47,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:40:47,190 INFO L470 AbstractCegarLoop]: Abstraction has 3008 states and 4034 transitions. [2021-12-15 09:40:47,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 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 09:40:47,191 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4034 transitions. [2021-12-15 09:40:47,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-15 09:40:47,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:47,195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:40:47,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:40:47,195 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:47,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:47,196 INFO L85 PathProgramCache]: Analyzing trace with hash -938273718, now seen corresponding path program 1 times [2021-12-15 09:40:47,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:47,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956119778] [2021-12-15 09:40:47,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:47,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:47,316 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:40:47,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:47,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956119778] [2021-12-15 09:40:47,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956119778] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:47,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:47,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:40:47,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748305710] [2021-12-15 09:40:47,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:47,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:40:47,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:47,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:40:47,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:47,319 INFO L87 Difference]: Start difference. First operand 3008 states and 4034 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 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 09:40:49,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:40:49,837 INFO L93 Difference]: Finished difference Result 9018 states and 12097 transitions. [2021-12-15 09:40:49,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:40:49,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 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 159 [2021-12-15 09:40:49,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:40:49,858 INFO L225 Difference]: With dead ends: 9018 [2021-12-15 09:40:49,858 INFO L226 Difference]: Without dead ends: 6012 [2021-12-15 09:40:49,863 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 09:40:49,869 INFO L933 BasicCegarLoop]: 547 mSDtfsCounter, 681 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2015 mSolverCounterSat, 827 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 2842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 827 IncrementalHoareTripleChecker+Valid, 2015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:40:49,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [681 Valid, 553 Invalid, 2842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [827 Valid, 2015 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 09:40:49,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6012 states. [2021-12-15 09:40:49,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6012 to 5261. [2021-12-15 09:40:49,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5261 states, 5260 states have (on average 1.2608365019011407) internal successors, (6632), 5260 states have internal predecessors, (6632), 0 states have call successors, (0), 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 09:40:49,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 6632 transitions. [2021-12-15 09:40:49,970 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 6632 transitions. Word has length 159 [2021-12-15 09:40:49,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:40:49,972 INFO L470 AbstractCegarLoop]: Abstraction has 5261 states and 6632 transitions. [2021-12-15 09:40:49,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 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 09:40:49,972 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 6632 transitions. [2021-12-15 09:40:49,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-15 09:40:49,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:49,978 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:40:49,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:40:49,979 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:49,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:49,980 INFO L85 PathProgramCache]: Analyzing trace with hash -548669970, now seen corresponding path program 1 times [2021-12-15 09:40:49,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:49,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974114396] [2021-12-15 09:40:49,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:49,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:50,230 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:40:50,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:50,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974114396] [2021-12-15 09:40:50,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974114396] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:50,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:50,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:40:50,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113678664] [2021-12-15 09:40:50,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:50,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 09:40:50,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:50,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 09:40:50,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:40:50,235 INFO L87 Difference]: Start difference. First operand 5261 states and 6632 transitions. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 4 states have internal predecessors, (194), 0 states have call successors, (0), 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 09:40:55,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:40:55,432 INFO L93 Difference]: Finished difference Result 17279 states and 21409 transitions. [2021-12-15 09:40:55,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 09:40:55,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 4 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2021-12-15 09:40:55,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:40:55,470 INFO L225 Difference]: With dead ends: 17279 [2021-12-15 09:40:55,471 INFO L226 Difference]: Without dead ends: 12020 [2021-12-15 09:40:55,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:40:55,480 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 2196 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 7397 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2196 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 7976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 7397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:40:55,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2196 Valid, 656 Invalid, 7976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 7397 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-12-15 09:40:55,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12020 states. [2021-12-15 09:40:55,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12020 to 10518. [2021-12-15 09:40:55,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10518 states, 10517 states have (on average 1.156223257582961) internal successors, (12160), 10517 states have internal predecessors, (12160), 0 states have call successors, (0), 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 09:40:55,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10518 states to 10518 states and 12160 transitions. [2021-12-15 09:40:55,643 INFO L78 Accepts]: Start accepts. Automaton has 10518 states and 12160 transitions. Word has length 194 [2021-12-15 09:40:55,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:40:55,645 INFO L470 AbstractCegarLoop]: Abstraction has 10518 states and 12160 transitions. [2021-12-15 09:40:55,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 4 states have internal predecessors, (194), 0 states have call successors, (0), 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 09:40:55,645 INFO L276 IsEmpty]: Start isEmpty. Operand 10518 states and 12160 transitions. [2021-12-15 09:40:55,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-12-15 09:40:55,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:55,649 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:40:55,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:40:55,649 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:55,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:55,651 INFO L85 PathProgramCache]: Analyzing trace with hash -341145559, now seen corresponding path program 1 times [2021-12-15 09:40:55,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:55,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685636983] [2021-12-15 09:40:55,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:55,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:55,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:55,822 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 09:40:55,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:55,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685636983] [2021-12-15 09:40:55,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685636983] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:55,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:55,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:40:55,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547717149] [2021-12-15 09:40:55,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:55,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:40:55,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:55,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:40:55,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:40:55,826 INFO L87 Difference]: Start difference. First operand 10518 states and 12160 transitions. Second operand has 4 states, 4 states have (on average 48.25) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 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 09:40:58,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:40:58,961 INFO L93 Difference]: Finished difference Result 26330 states and 31019 transitions. [2021-12-15 09:40:58,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:40:58,961 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.25) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 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 262 [2021-12-15 09:40:58,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:40:58,996 INFO L225 Difference]: With dead ends: 26330 [2021-12-15 09:40:58,997 INFO L226 Difference]: Without dead ends: 15777 [2021-12-15 09:40:59,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:40:59,009 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 851 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3408 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 3961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 3408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:40:59,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 324 Invalid, 3961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 3408 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-15 09:40:59,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15777 states. [2021-12-15 09:40:59,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15777 to 14273. [2021-12-15 09:40:59,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14273 states, 14272 states have (on average 1.148612668161435) internal successors, (16393), 14272 states have internal predecessors, (16393), 0 states have call successors, (0), 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 09:40:59,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14273 states to 14273 states and 16393 transitions. [2021-12-15 09:40:59,225 INFO L78 Accepts]: Start accepts. Automaton has 14273 states and 16393 transitions. Word has length 262 [2021-12-15 09:40:59,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:40:59,227 INFO L470 AbstractCegarLoop]: Abstraction has 14273 states and 16393 transitions. [2021-12-15 09:40:59,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.25) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 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 09:40:59,231 INFO L276 IsEmpty]: Start isEmpty. Operand 14273 states and 16393 transitions. [2021-12-15 09:40:59,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-12-15 09:40:59,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:59,235 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, 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, 1, 1, 1, 1] [2021-12-15 09:40:59,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:40:59,235 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:59,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:59,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1330764730, now seen corresponding path program 1 times [2021-12-15 09:40:59,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:59,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77396581] [2021-12-15 09:40:59,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:59,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:59,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:59,345 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:40:59,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:59,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77396581] [2021-12-15 09:40:59,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77396581] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:59,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:59,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:40:59,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188978164] [2021-12-15 09:40:59,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:59,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:40:59,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:59,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:40:59,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:59,349 INFO L87 Difference]: Start difference. First operand 14273 states and 16393 transitions. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 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 09:41:02,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:41:02,301 INFO L93 Difference]: Finished difference Result 41311 states and 47620 transitions. [2021-12-15 09:41:02,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:41:02,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 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 276 [2021-12-15 09:41:02,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:41:02,346 INFO L225 Difference]: With dead ends: 41311 [2021-12-15 09:41:02,347 INFO L226 Difference]: Without dead ends: 27040 [2021-12-15 09:41:02,361 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 09:41:02,362 INFO L933 BasicCegarLoop]: 1378 mSDtfsCounter, 667 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2720 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 3081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 2720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:41:02,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [667 Valid, 1386 Invalid, 3081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 2720 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 09:41:02,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27040 states. [2021-12-15 09:41:02,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27040 to 24787. [2021-12-15 09:41:02,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24787 states, 24786 states have (on average 1.1414508190107318) internal successors, (28292), 24786 states have internal predecessors, (28292), 0 states have call successors, (0), 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 09:41:02,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24787 states to 24787 states and 28292 transitions. [2021-12-15 09:41:02,664 INFO L78 Accepts]: Start accepts. Automaton has 24787 states and 28292 transitions. Word has length 276 [2021-12-15 09:41:02,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:41:02,665 INFO L470 AbstractCegarLoop]: Abstraction has 24787 states and 28292 transitions. [2021-12-15 09:41:02,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 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 09:41:02,665 INFO L276 IsEmpty]: Start isEmpty. Operand 24787 states and 28292 transitions. [2021-12-15 09:41:02,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-12-15 09:41:02,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:41:02,669 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:41:02,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:41:02,669 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:41:02,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:41:02,669 INFO L85 PathProgramCache]: Analyzing trace with hash -533867888, now seen corresponding path program 1 times [2021-12-15 09:41:02,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:41:02,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684130302] [2021-12-15 09:41:02,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:02,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:41:02,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:02,905 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 41 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:41:02,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:41:02,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684130302] [2021-12-15 09:41:02,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684130302] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:41:02,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792560858] [2021-12-15 09:41:02,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:02,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:41:02,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:41:02,908 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 09:41:02,909 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 09:41:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:03,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:41:03,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:41:03,510 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-15 09:41:03,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:41:03,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792560858] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:41:03,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:41:03,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-15 09:41:03,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292810777] [2021-12-15 09:41:03,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:41:03,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:41:03,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:41:03,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:41:03,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-15 09:41:03,515 INFO L87 Difference]: Start difference. First operand 24787 states and 28292 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 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 09:41:06,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:41:06,556 INFO L93 Difference]: Finished difference Result 60837 states and 70633 transitions. [2021-12-15 09:41:06,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:41:06,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 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 280 [2021-12-15 09:41:06,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:41:06,627 INFO L225 Difference]: With dead ends: 60837 [2021-12-15 09:41:06,628 INFO L226 Difference]: Without dead ends: 36052 [2021-12-15 09:41:06,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-15 09:41:06,653 INFO L933 BasicCegarLoop]: 491 mSDtfsCounter, 725 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 648 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 2909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 648 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:41:06,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [725 Valid, 498 Invalid, 2909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [648 Valid, 2261 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 09:41:06,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36052 states. [2021-12-15 09:41:06,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36052 to 35301. [2021-12-15 09:41:07,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35301 states, 35300 states have (on average 1.1458640226628896) internal successors, (40449), 35300 states have internal predecessors, (40449), 0 states have call successors, (0), 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 09:41:07,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35301 states to 35301 states and 40449 transitions. [2021-12-15 09:41:07,079 INFO L78 Accepts]: Start accepts. Automaton has 35301 states and 40449 transitions. Word has length 280 [2021-12-15 09:41:07,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:41:07,079 INFO L470 AbstractCegarLoop]: Abstraction has 35301 states and 40449 transitions. [2021-12-15 09:41:07,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 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 09:41:07,080 INFO L276 IsEmpty]: Start isEmpty. Operand 35301 states and 40449 transitions. [2021-12-15 09:41:07,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-12-15 09:41:07,085 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:41:07,085 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:41:07,110 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 09:41:07,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:41:07,310 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:41:07,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:41:07,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1028166206, now seen corresponding path program 1 times [2021-12-15 09:41:07,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:41:07,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358193059] [2021-12-15 09:41:07,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:07,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:41:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-15 09:41:07,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:41:07,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358193059] [2021-12-15 09:41:07,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358193059] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:41:07,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:41:07,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:41:07,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185575292] [2021-12-15 09:41:07,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:41:07,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:41:07,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:41:07,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:41:07,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:41:07,435 INFO L87 Difference]: Start difference. First operand 35301 states and 40449 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 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 09:41:10,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:41:10,220 INFO L93 Difference]: Finished difference Result 83367 states and 96431 transitions. [2021-12-15 09:41:10,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:41:10,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 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 327 [2021-12-15 09:41:10,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:41:10,285 INFO L225 Difference]: With dead ends: 83367 [2021-12-15 09:41:10,286 INFO L226 Difference]: Without dead ends: 48068 [2021-12-15 09:41:10,322 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 09:41:10,322 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 738 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2380 mSolverCounterSat, 629 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 3009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 629 IncrementalHoareTripleChecker+Valid, 2380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:41:10,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [738 Valid, 191 Invalid, 3009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [629 Valid, 2380 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 09:41:10,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48068 states. [2021-12-15 09:41:11,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48068 to 46566. [2021-12-15 09:41:11,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46566 states, 46565 states have (on average 1.1619241919896919) internal successors, (54105), 46565 states have internal predecessors, (54105), 0 states have call successors, (0), 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 09:41:11,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46566 states to 46566 states and 54105 transitions. [2021-12-15 09:41:11,154 INFO L78 Accepts]: Start accepts. Automaton has 46566 states and 54105 transitions. Word has length 327 [2021-12-15 09:41:11,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:41:11,155 INFO L470 AbstractCegarLoop]: Abstraction has 46566 states and 54105 transitions. [2021-12-15 09:41:11,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 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 09:41:11,155 INFO L276 IsEmpty]: Start isEmpty. Operand 46566 states and 54105 transitions. [2021-12-15 09:41:11,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2021-12-15 09:41:11,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:41:11,169 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:41:11,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:41:11,170 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:41:11,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:41:11,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1718673054, now seen corresponding path program 1 times [2021-12-15 09:41:11,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:41:11,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648505254] [2021-12-15 09:41:11,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:11,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:41:11,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:11,478 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 328 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-15 09:41:11,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:41:11,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648505254] [2021-12-15 09:41:11,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648505254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:41:11,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:41:11,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:41:11,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133715789] [2021-12-15 09:41:11,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:41:11,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:41:11,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:41:11,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:41:11,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:41:11,485 INFO L87 Difference]: Start difference. First operand 46566 states and 54105 transitions. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 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 09:41:14,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:41:14,142 INFO L93 Difference]: Finished difference Result 114909 states and 135315 transitions. [2021-12-15 09:41:14,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:41:14,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 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 401 [2021-12-15 09:41:14,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:41:14,229 INFO L225 Difference]: With dead ends: 114909 [2021-12-15 09:41:14,229 INFO L226 Difference]: Without dead ends: 68345 [2021-12-15 09:41:14,259 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 09:41:14,260 INFO L933 BasicCegarLoop]: 1225 mSDtfsCounter, 679 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2266 mSolverCounterSat, 518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 2784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 518 IncrementalHoareTripleChecker+Valid, 2266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:41:14,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [679 Valid, 1233 Invalid, 2784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [518 Valid, 2266 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:41:14,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68345 states. [2021-12-15 09:41:14,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68345 to 66092. [2021-12-15 09:41:14,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66092 states, 66091 states have (on average 1.136523883736061) internal successors, (75114), 66091 states have internal predecessors, (75114), 0 states have call successors, (0), 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 09:41:15,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66092 states to 66092 states and 75114 transitions. [2021-12-15 09:41:15,078 INFO L78 Accepts]: Start accepts. Automaton has 66092 states and 75114 transitions. Word has length 401 [2021-12-15 09:41:15,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:41:15,079 INFO L470 AbstractCegarLoop]: Abstraction has 66092 states and 75114 transitions. [2021-12-15 09:41:15,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 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 09:41:15,079 INFO L276 IsEmpty]: Start isEmpty. Operand 66092 states and 75114 transitions. [2021-12-15 09:41:15,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2021-12-15 09:41:15,085 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:41:15,086 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 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 09:41:15,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:41:15,086 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:41:15,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:41:15,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1114491564, now seen corresponding path program 1 times [2021-12-15 09:41:15,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:41:15,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582304317] [2021-12-15 09:41:15,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:15,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:41:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 328 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-15 09:41:15,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:41:15,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582304317] [2021-12-15 09:41:15,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582304317] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:41:15,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:41:15,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:41:15,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039124984] [2021-12-15 09:41:15,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:41:15,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:41:15,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:41:15,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:41:15,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:41:15,422 INFO L87 Difference]: Start difference. First operand 66092 states and 75114 transitions. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 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 09:41:18,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:41:18,290 INFO L93 Difference]: Finished difference Result 150206 states and 173275 transitions. [2021-12-15 09:41:18,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:41:18,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 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 405 [2021-12-15 09:41:18,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:41:18,388 INFO L225 Difference]: With dead ends: 150206 [2021-12-15 09:41:18,388 INFO L226 Difference]: Without dead ends: 84116 [2021-12-15 09:41:18,423 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 09:41:18,423 INFO L933 BasicCegarLoop]: 1277 mSDtfsCounter, 673 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2236 mSolverCounterSat, 531 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 2767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 531 IncrementalHoareTripleChecker+Valid, 2236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:41:18,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [673 Valid, 1285 Invalid, 2767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [531 Valid, 2236 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 09:41:18,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84116 states. [2021-12-15 09:41:19,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84116 to 84116. [2021-12-15 09:41:19,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84116 states, 84115 states have (on average 1.1197883849491768) internal successors, (94191), 84115 states have internal predecessors, (94191), 0 states have call successors, (0), 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 09:41:19,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84116 states to 84116 states and 94191 transitions. [2021-12-15 09:41:19,659 INFO L78 Accepts]: Start accepts. Automaton has 84116 states and 94191 transitions. Word has length 405 [2021-12-15 09:41:19,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:41:19,660 INFO L470 AbstractCegarLoop]: Abstraction has 84116 states and 94191 transitions. [2021-12-15 09:41:19,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 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 09:41:19,660 INFO L276 IsEmpty]: Start isEmpty. Operand 84116 states and 94191 transitions. [2021-12-15 09:41:19,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-12-15 09:41:19,666 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:41:19,667 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:41:19,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:41:19,667 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:41:19,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:41:19,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1052886306, now seen corresponding path program 1 times [2021-12-15 09:41:19,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:41:19,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228471965] [2021-12-15 09:41:19,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:19,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:41:19,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:19,838 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2021-12-15 09:41:19,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:41:19,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228471965] [2021-12-15 09:41:19,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228471965] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:41:19,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:41:19,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:41:19,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825635102] [2021-12-15 09:41:19,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:41:19,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:41:19,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:41:19,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:41:19,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:41:19,841 INFO L87 Difference]: Start difference. First operand 84116 states and 94191 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 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 09:41:22,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:41:22,659 INFO L93 Difference]: Finished difference Result 184752 states and 206449 transitions. [2021-12-15 09:41:22,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:41:22,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 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 409 [2021-12-15 09:41:22,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:41:22,927 INFO L225 Difference]: With dead ends: 184752 [2021-12-15 09:41:22,927 INFO L226 Difference]: Without dead ends: 99887 [2021-12-15 09:41:22,970 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 09:41:22,983 INFO L933 BasicCegarLoop]: 892 mSDtfsCounter, 818 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2129 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 2713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 2129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:41:22,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [818 Valid, 900 Invalid, 2713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [584 Valid, 2129 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:41:23,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99887 states. [2021-12-15 09:41:23,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99887 to 94630. [2021-12-15 09:41:23,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94630 states, 94629 states have (on average 1.102304790286276) internal successors, (104310), 94629 states have internal predecessors, (104310), 0 states have call successors, (0), 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 09:41:24,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94630 states to 94630 states and 104310 transitions. [2021-12-15 09:41:24,135 INFO L78 Accepts]: Start accepts. Automaton has 94630 states and 104310 transitions. Word has length 409 [2021-12-15 09:41:24,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:41:24,136 INFO L470 AbstractCegarLoop]: Abstraction has 94630 states and 104310 transitions. [2021-12-15 09:41:24,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 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 09:41:24,136 INFO L276 IsEmpty]: Start isEmpty. Operand 94630 states and 104310 transitions. [2021-12-15 09:41:24,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2021-12-15 09:41:24,150 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:41:24,151 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:41:24,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 09:41:24,151 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:41:24,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:41:24,152 INFO L85 PathProgramCache]: Analyzing trace with hash 684792886, now seen corresponding path program 1 times [2021-12-15 09:41:24,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:41:24,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237021310] [2021-12-15 09:41:24,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:41:24,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:41:24,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:41:24,309 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 396 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-15 09:41:24,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:41:24,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237021310] [2021-12-15 09:41:24,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237021310] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:41:24,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:41:24,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:41:24,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977743127] [2021-12-15 09:41:24,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:41:24,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:41:24,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:41:24,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:41:24,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:41:24,313 INFO L87 Difference]: Start difference. First operand 94630 states and 104310 transitions. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)