./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label17.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/Problem03_label17.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 09db197a4bc835c4357a369c0d6e9c99a50322d20849e0303ed04dd1e516e51b --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 11:11:35,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 11:11:35,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 11:11:35,712 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 11:11:35,712 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 11:11:35,713 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 11:11:35,717 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 11:11:35,719 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 11:11:35,721 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 11:11:35,725 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 11:11:35,726 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 11:11:35,728 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 11:11:35,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 11:11:35,730 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 11:11:35,732 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 11:11:35,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 11:11:35,733 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 11:11:35,735 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 11:11:35,738 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 11:11:35,743 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 11:11:35,745 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 11:11:35,746 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 11:11:35,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 11:11:35,747 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 11:11:35,748 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 11:11:35,750 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 11:11:35,750 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 11:11:35,751 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 11:11:35,752 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 11:11:35,752 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 11:11:35,753 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 11:11:35,753 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 11:11:35,754 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 11:11:35,755 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 11:11:35,755 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 11:11:35,756 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 11:11:35,756 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 11:11:35,757 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 11:11:35,757 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 11:11:35,757 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 11:11:35,758 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 11:11:35,759 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 11:11:35,760 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 11:11:35,787 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 11:11:35,788 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 11:11:35,788 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 11:11:35,789 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 11:11:35,789 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 11:11:35,789 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 11:11:35,790 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 11:11:35,790 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 11:11:35,790 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 11:11:35,791 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 11:11:35,791 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 11:11:35,791 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 11:11:35,791 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 11:11:35,792 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 11:11:35,792 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 11:11:35,792 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 11:11:35,792 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 11:11:35,792 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 11:11:35,792 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 11:11:35,793 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 11:11:35,793 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 11:11:35,793 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 11:11:35,793 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 11:11:35,793 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 11:11:35,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 11:11:35,794 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 11:11:35,794 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 11:11:35,794 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 11:11:35,794 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 11:11:35,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 11:11:35,795 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 11:11:35,795 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 11:11:35,795 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 11:11:35,795 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 09db197a4bc835c4357a369c0d6e9c99a50322d20849e0303ed04dd1e516e51b [2022-07-19 11:11:35,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 11:11:36,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 11:11:36,022 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 11:11:36,023 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 11:11:36,023 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 11:11:36,024 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label17.c [2022-07-19 11:11:36,081 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3446bd4b6/3a1575079f2a4c59a5de6b453a5074f8/FLAGc07b6744c [2022-07-19 11:11:36,577 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 11:11:36,577 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label17.c [2022-07-19 11:11:36,597 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3446bd4b6/3a1575079f2a4c59a5de6b453a5074f8/FLAGc07b6744c [2022-07-19 11:11:37,100 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3446bd4b6/3a1575079f2a4c59a5de6b453a5074f8 [2022-07-19 11:11:37,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 11:11:37,104 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 11:11:37,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 11:11:37,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 11:11:37,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 11:11:37,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:11:37" (1/1) ... [2022-07-19 11:11:37,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f05eb2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:37, skipping insertion in model container [2022-07-19 11:11:37,108 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:11:37" (1/1) ... [2022-07-19 11:11:37,112 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 11:11:37,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 11:11:37,566 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/Problem03_label17.c[61094,61107] [2022-07-19 11:11:37,589 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 11:11:37,596 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 11:11:37,775 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/Problem03_label17.c[61094,61107] [2022-07-19 11:11:37,780 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 11:11:37,792 INFO L208 MainTranslator]: Completed translation [2022-07-19 11:11:37,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:37 WrapperNode [2022-07-19 11:11:37,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 11:11:37,794 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 11:11:37,794 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 11:11:37,794 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 11:11:37,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:37" (1/1) ... [2022-07-19 11:11:37,827 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:37" (1/1) ... [2022-07-19 11:11:37,888 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-07-19 11:11:37,888 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 11:11:37,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 11:11:37,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 11:11:37,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 11:11:37,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:37" (1/1) ... [2022-07-19 11:11:37,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:37" (1/1) ... [2022-07-19 11:11:37,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:37" (1/1) ... [2022-07-19 11:11:37,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:37" (1/1) ... [2022-07-19 11:11:37,940 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:37" (1/1) ... [2022-07-19 11:11:37,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:37" (1/1) ... [2022-07-19 11:11:37,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:37" (1/1) ... [2022-07-19 11:11:37,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 11:11:37,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 11:11:37,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 11:11:37,966 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 11:11:37,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:37" (1/1) ... [2022-07-19 11:11:37,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 11:11:37,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:11:37,989 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) [2022-07-19 11:11:38,009 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 [2022-07-19 11:11:38,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 11:11:38,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 11:11:38,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 11:11:38,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 11:11:38,154 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 11:11:38,161 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 11:11:39,184 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 11:11:39,191 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 11:11:39,191 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 11:11:39,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:11:39 BoogieIcfgContainer [2022-07-19 11:11:39,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 11:11:39,194 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 11:11:39,194 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 11:11:39,196 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 11:11:39,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:11:37" (1/3) ... [2022-07-19 11:11:39,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b3d8907 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:11:39, skipping insertion in model container [2022-07-19 11:11:39,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:37" (2/3) ... [2022-07-19 11:11:39,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b3d8907 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:11:39, skipping insertion in model container [2022-07-19 11:11:39,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:11:39" (3/3) ... [2022-07-19 11:11:39,198 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label17.c [2022-07-19 11:11:39,208 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 11:11:39,209 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 11:11:39,259 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 11:11:39,264 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@63af9ef0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4d7f77bd [2022-07-19 11:11:39,265 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 11:11:39,270 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:39,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-07-19 11:11:39,283 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:39,283 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:39,284 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:39,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:39,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1830500685, now seen corresponding path program 1 times [2022-07-19 11:11:39,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:39,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028200365] [2022-07-19 11:11:39,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:39,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:39,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:11:39,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:39,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028200365] [2022-07-19 11:11:39,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028200365] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:39,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:11:39,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:11:39,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188758986] [2022-07-19 11:11:39,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:39,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:39,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:39,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:39,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:39,752 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:40,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:40,617 INFO L93 Difference]: Finished difference Result 833 states and 1474 transitions. [2022-07-19 11:11:40,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:40,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 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 199 [2022-07-19 11:11:40,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:40,628 INFO L225 Difference]: With dead ends: 833 [2022-07-19 11:11:40,628 INFO L226 Difference]: Without dead ends: 454 [2022-07-19 11:11:40,631 INFO L412 NwaCegarLoop]: 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 [2022-07-19 11:11:40,633 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 92 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:40,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 163 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 11:11:40,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-07-19 11:11:40,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 450. [2022-07-19 11:11:40,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.55902004454343) internal successors, (700), 449 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:40,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 700 transitions. [2022-07-19 11:11:40,679 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 700 transitions. Word has length 199 [2022-07-19 11:11:40,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:40,680 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 700 transitions. [2022-07-19 11:11:40,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:40,680 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 700 transitions. [2022-07-19 11:11:40,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-07-19 11:11:40,691 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:40,692 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:40,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 11:11:40,692 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:40,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:40,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1786939481, now seen corresponding path program 1 times [2022-07-19 11:11:40,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:40,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545370188] [2022-07-19 11:11:40,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:40,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:40,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:11:40,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:40,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545370188] [2022-07-19 11:11:40,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545370188] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:40,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:11:40,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:11:40,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735797573] [2022-07-19 11:11:40,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:40,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:40,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:40,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:40,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:40,783 INFO L87 Difference]: Start difference. First operand 450 states and 700 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:41,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:41,351 INFO L93 Difference]: Finished difference Result 1337 states and 2085 transitions. [2022-07-19 11:11:41,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:41,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 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 205 [2022-07-19 11:11:41,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:41,354 INFO L225 Difference]: With dead ends: 1337 [2022-07-19 11:11:41,354 INFO L226 Difference]: Without dead ends: 889 [2022-07-19 11:11:41,356 INFO L412 NwaCegarLoop]: 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 [2022-07-19 11:11:41,357 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:41,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 104 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:11:41,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-07-19 11:11:41,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 885. [2022-07-19 11:11:41,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 1.5429864253393666) internal successors, (1364), 884 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:41,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1364 transitions. [2022-07-19 11:11:41,376 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1364 transitions. Word has length 205 [2022-07-19 11:11:41,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:41,376 INFO L495 AbstractCegarLoop]: Abstraction has 885 states and 1364 transitions. [2022-07-19 11:11:41,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:41,376 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1364 transitions. [2022-07-19 11:11:41,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-07-19 11:11:41,379 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:41,379 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:41,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 11:11:41,380 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:41,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:41,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1463720228, now seen corresponding path program 1 times [2022-07-19 11:11:41,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:41,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082556702] [2022-07-19 11:11:41,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:41,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:11:41,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:41,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082556702] [2022-07-19 11:11:41,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082556702] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:41,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:11:41,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:11:41,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361531561] [2022-07-19 11:11:41,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:41,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:41,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:41,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:41,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:41,445 INFO L87 Difference]: Start difference. First operand 885 states and 1364 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:41,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:41,985 INFO L93 Difference]: Finished difference Result 2599 states and 4012 transitions. [2022-07-19 11:11:41,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:41,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 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 212 [2022-07-19 11:11:41,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:41,990 INFO L225 Difference]: With dead ends: 2599 [2022-07-19 11:11:41,990 INFO L226 Difference]: Without dead ends: 1716 [2022-07-19 11:11:41,992 INFO L412 NwaCegarLoop]: 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 [2022-07-19 11:11:41,993 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 258 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:41,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 134 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:11:41,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2022-07-19 11:11:42,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1714. [2022-07-19 11:11:42,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 1.4687682428488034) internal successors, (2516), 1713 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:42,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 2516 transitions. [2022-07-19 11:11:42,037 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 2516 transitions. Word has length 212 [2022-07-19 11:11:42,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:42,038 INFO L495 AbstractCegarLoop]: Abstraction has 1714 states and 2516 transitions. [2022-07-19 11:11:42,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:42,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 2516 transitions. [2022-07-19 11:11:42,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-07-19 11:11:42,041 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:42,041 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:42,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 11:11:42,042 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:42,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:42,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1975689975, now seen corresponding path program 1 times [2022-07-19 11:11:42,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:42,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928312496] [2022-07-19 11:11:42,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:42,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:42,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:11:42,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:42,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928312496] [2022-07-19 11:11:42,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928312496] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:42,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:11:42,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:11:42,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174885529] [2022-07-19 11:11:42,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:42,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:42,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:42,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:42,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:42,094 INFO L87 Difference]: Start difference. First operand 1714 states and 2516 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 2 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:42,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:42,619 INFO L93 Difference]: Finished difference Result 4665 states and 6865 transitions. [2022-07-19 11:11:42,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:42,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 2 states have internal predecessors, (212), 0 states have call successors, (0), 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 212 [2022-07-19 11:11:42,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:42,630 INFO L225 Difference]: With dead ends: 4665 [2022-07-19 11:11:42,630 INFO L226 Difference]: Without dead ends: 2953 [2022-07-19 11:11:42,635 INFO L412 NwaCegarLoop]: 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 [2022-07-19 11:11:42,642 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 241 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:42,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 167 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:11:42,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2953 states. [2022-07-19 11:11:42,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2953 to 2949. [2022-07-19 11:11:42,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 2948 states have (on average 1.4189280868385346) internal successors, (4183), 2948 states have internal predecessors, (4183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:42,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 4183 transitions. [2022-07-19 11:11:42,694 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 4183 transitions. Word has length 212 [2022-07-19 11:11:42,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:42,694 INFO L495 AbstractCegarLoop]: Abstraction has 2949 states and 4183 transitions. [2022-07-19 11:11:42,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 2 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:42,694 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 4183 transitions. [2022-07-19 11:11:42,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-07-19 11:11:42,700 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:42,700 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:42,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 11:11:42,700 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:42,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:42,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1982755944, now seen corresponding path program 1 times [2022-07-19 11:11:42,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:42,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184341046] [2022-07-19 11:11:42,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:42,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:42,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:42,769 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 11:11:42,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:42,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184341046] [2022-07-19 11:11:42,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184341046] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:42,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:11:42,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:11:42,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061838335] [2022-07-19 11:11:42,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:42,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:42,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:42,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:42,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:42,771 INFO L87 Difference]: Start difference. First operand 2949 states and 4183 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:43,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:43,337 INFO L93 Difference]: Finished difference Result 8575 states and 12210 transitions. [2022-07-19 11:11:43,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:43,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 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 213 [2022-07-19 11:11:43,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:43,353 INFO L225 Difference]: With dead ends: 8575 [2022-07-19 11:11:43,353 INFO L226 Difference]: Without dead ends: 5831 [2022-07-19 11:11:43,357 INFO L412 NwaCegarLoop]: 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 [2022-07-19 11:11:43,358 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:43,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 92 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:11:43,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5831 states. [2022-07-19 11:11:43,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5831 to 5795. [2022-07-19 11:11:43,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5795 states, 5794 states have (on average 1.387124611667242) internal successors, (8037), 5794 states have internal predecessors, (8037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:43,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5795 states to 5795 states and 8037 transitions. [2022-07-19 11:11:43,482 INFO L78 Accepts]: Start accepts. Automaton has 5795 states and 8037 transitions. Word has length 213 [2022-07-19 11:11:43,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:43,482 INFO L495 AbstractCegarLoop]: Abstraction has 5795 states and 8037 transitions. [2022-07-19 11:11:43,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:43,483 INFO L276 IsEmpty]: Start isEmpty. Operand 5795 states and 8037 transitions. [2022-07-19 11:11:43,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-07-19 11:11:43,490 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:43,490 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:43,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 11:11:43,490 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:43,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:43,490 INFO L85 PathProgramCache]: Analyzing trace with hash -862515586, now seen corresponding path program 1 times [2022-07-19 11:11:43,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:43,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21583813] [2022-07-19 11:11:43,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:43,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:43,547 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-19 11:11:43,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:43,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21583813] [2022-07-19 11:11:43,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21583813] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:43,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:11:43,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:11:43,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481760233] [2022-07-19 11:11:43,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:43,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:43,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:43,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:43,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:43,549 INFO L87 Difference]: Start difference. First operand 5795 states and 8037 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:44,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:44,172 INFO L93 Difference]: Finished difference Result 17290 states and 23986 transitions. [2022-07-19 11:11:44,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:44,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 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 227 [2022-07-19 11:11:44,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:44,203 INFO L225 Difference]: With dead ends: 17290 [2022-07-19 11:11:44,203 INFO L226 Difference]: Without dead ends: 11497 [2022-07-19 11:11:44,242 INFO L412 NwaCegarLoop]: 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 [2022-07-19 11:11:44,242 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 217 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:44,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 414 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:11:44,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11497 states. [2022-07-19 11:11:44,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11497 to 11490. [2022-07-19 11:11:44,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11490 states, 11489 states have (on average 1.298807555052659) internal successors, (14922), 11489 states have internal predecessors, (14922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:44,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11490 states to 11490 states and 14922 transitions. [2022-07-19 11:11:44,416 INFO L78 Accepts]: Start accepts. Automaton has 11490 states and 14922 transitions. Word has length 227 [2022-07-19 11:11:44,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:44,416 INFO L495 AbstractCegarLoop]: Abstraction has 11490 states and 14922 transitions. [2022-07-19 11:11:44,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:44,416 INFO L276 IsEmpty]: Start isEmpty. Operand 11490 states and 14922 transitions. [2022-07-19 11:11:44,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-07-19 11:11:44,433 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:44,433 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:44,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 11:11:44,433 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:44,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:44,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1762359950, now seen corresponding path program 1 times [2022-07-19 11:11:44,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:44,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316169537] [2022-07-19 11:11:44,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:44,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:44,491 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 11:11:44,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:44,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316169537] [2022-07-19 11:11:44,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316169537] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:44,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:11:44,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:11:44,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347598206] [2022-07-19 11:11:44,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:44,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:44,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:44,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:44,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:44,494 INFO L87 Difference]: Start difference. First operand 11490 states and 14922 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:45,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:45,156 INFO L93 Difference]: Finished difference Result 30543 states and 39618 transitions. [2022-07-19 11:11:45,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:45,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 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 234 [2022-07-19 11:11:45,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:45,202 INFO L225 Difference]: With dead ends: 30543 [2022-07-19 11:11:45,203 INFO L226 Difference]: Without dead ends: 19867 [2022-07-19 11:11:45,217 INFO L412 NwaCegarLoop]: 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 [2022-07-19 11:11:45,218 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 219 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:45,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 162 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:11:45,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19867 states. [2022-07-19 11:11:45,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19867 to 19849. [2022-07-19 11:11:45,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19849 states, 19848 states have (on average 1.2677347843611446) internal successors, (25162), 19848 states have internal predecessors, (25162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:45,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19849 states to 19849 states and 25162 transitions. [2022-07-19 11:11:45,517 INFO L78 Accepts]: Start accepts. Automaton has 19849 states and 25162 transitions. Word has length 234 [2022-07-19 11:11:45,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:45,517 INFO L495 AbstractCegarLoop]: Abstraction has 19849 states and 25162 transitions. [2022-07-19 11:11:45,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:45,518 INFO L276 IsEmpty]: Start isEmpty. Operand 19849 states and 25162 transitions. [2022-07-19 11:11:45,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-07-19 11:11:45,545 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:45,545 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:45,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 11:11:45,546 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:45,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:45,546 INFO L85 PathProgramCache]: Analyzing trace with hash 968891670, now seen corresponding path program 1 times [2022-07-19 11:11:45,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:45,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243151373] [2022-07-19 11:11:45,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:45,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-19 11:11:45,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:45,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243151373] [2022-07-19 11:11:45,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243151373] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:45,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:11:45,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:11:45,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245803218] [2022-07-19 11:11:45,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:45,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:45,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:45,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:45,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:45,619 INFO L87 Difference]: Start difference. First operand 19849 states and 25162 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:46,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:46,384 INFO L93 Difference]: Finished difference Result 45211 states and 57514 transitions. [2022-07-19 11:11:46,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:46,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2022-07-19 11:11:46,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:46,426 INFO L225 Difference]: With dead ends: 45211 [2022-07-19 11:11:46,426 INFO L226 Difference]: Without dead ends: 25364 [2022-07-19 11:11:46,446 INFO L412 NwaCegarLoop]: 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 [2022-07-19 11:11:46,446 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 210 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:46,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 408 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:11:46,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25364 states. [2022-07-19 11:11:46,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25364 to 24516. [2022-07-19 11:11:46,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24516 states, 24515 states have (on average 1.2369161737711605) internal successors, (30323), 24515 states have internal predecessors, (30323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:46,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24516 states to 24516 states and 30323 transitions. [2022-07-19 11:11:46,825 INFO L78 Accepts]: Start accepts. Automaton has 24516 states and 30323 transitions. Word has length 253 [2022-07-19 11:11:46,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:46,826 INFO L495 AbstractCegarLoop]: Abstraction has 24516 states and 30323 transitions. [2022-07-19 11:11:46,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:46,826 INFO L276 IsEmpty]: Start isEmpty. Operand 24516 states and 30323 transitions. [2022-07-19 11:11:46,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-07-19 11:11:46,859 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:46,859 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:46,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 11:11:46,859 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:46,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:46,860 INFO L85 PathProgramCache]: Analyzing trace with hash -268911777, now seen corresponding path program 1 times [2022-07-19 11:11:46,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:46,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312554608] [2022-07-19 11:11:46,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:46,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:46,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:46,987 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-19 11:11:46,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:46,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312554608] [2022-07-19 11:11:46,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312554608] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:46,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:11:46,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:11:46,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659039573] [2022-07-19 11:11:46,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:46,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:46,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:46,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:46,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:46,990 INFO L87 Difference]: Start difference. First operand 24516 states and 30323 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:47,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:47,678 INFO L93 Difference]: Finished difference Result 53726 states and 66220 transitions. [2022-07-19 11:11:47,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:47,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 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 259 [2022-07-19 11:11:47,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:47,726 INFO L225 Difference]: With dead ends: 53726 [2022-07-19 11:11:47,726 INFO L226 Difference]: Without dead ends: 30227 [2022-07-19 11:11:47,826 INFO L412 NwaCegarLoop]: 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 [2022-07-19 11:11:47,827 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 204 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:47,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 184 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:11:47,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30227 states. [2022-07-19 11:11:48,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30227 to 30200. [2022-07-19 11:11:48,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30200 states, 30199 states have (on average 1.2160336434981291) internal successors, (36723), 30199 states have internal predecessors, (36723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:48,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30200 states to 30200 states and 36723 transitions. [2022-07-19 11:11:48,152 INFO L78 Accepts]: Start accepts. Automaton has 30200 states and 36723 transitions. Word has length 259 [2022-07-19 11:11:48,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:48,155 INFO L495 AbstractCegarLoop]: Abstraction has 30200 states and 36723 transitions. [2022-07-19 11:11:48,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:48,156 INFO L276 IsEmpty]: Start isEmpty. Operand 30200 states and 36723 transitions. [2022-07-19 11:11:48,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-07-19 11:11:48,180 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:48,181 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:48,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 11:11:48,181 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:48,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:48,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1560875220, now seen corresponding path program 2 times [2022-07-19 11:11:48,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:48,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741025517] [2022-07-19 11:11:48,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:48,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:48,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:48,263 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-19 11:11:48,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:48,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741025517] [2022-07-19 11:11:48,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741025517] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:11:48,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184866270] [2022-07-19 11:11:48,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 11:11:48,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:11:48,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:11:48,266 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) [2022-07-19 11:11:48,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 11:11:48,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 11:11:48,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 11:11:48,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 11:11:48,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:11:48,817 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-19 11:11:48,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:11:48,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184866270] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:48,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:11:48,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-19 11:11:48,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979027874] [2022-07-19 11:11:48,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:48,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:48,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:48,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:48,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:11:48,819 INFO L87 Difference]: Start difference. First operand 30200 states and 36723 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:49,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:49,591 INFO L93 Difference]: Finished difference Result 66947 states and 82285 transitions. [2022-07-19 11:11:49,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:49,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 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 266 [2022-07-19 11:11:49,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:49,650 INFO L225 Difference]: With dead ends: 66947 [2022-07-19 11:11:49,650 INFO L226 Difference]: Without dead ends: 37561 [2022-07-19 11:11:49,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:11:49,676 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 70 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:49,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 189 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:11:49,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37561 states. [2022-07-19 11:11:50,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37561 to 37538. [2022-07-19 11:11:50,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37538 states, 37537 states have (on average 1.214481711378107) internal successors, (45588), 37537 states have internal predecessors, (45588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:50,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37538 states to 37538 states and 45588 transitions. [2022-07-19 11:11:50,190 INFO L78 Accepts]: Start accepts. Automaton has 37538 states and 45588 transitions. Word has length 266 [2022-07-19 11:11:50,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:50,191 INFO L495 AbstractCegarLoop]: Abstraction has 37538 states and 45588 transitions. [2022-07-19 11:11:50,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:50,191 INFO L276 IsEmpty]: Start isEmpty. Operand 37538 states and 45588 transitions. [2022-07-19 11:11:50,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-07-19 11:11:50,225 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:50,225 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:50,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 11:11:50,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 11:11:50,439 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:50,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:50,440 INFO L85 PathProgramCache]: Analyzing trace with hash 659764699, now seen corresponding path program 1 times [2022-07-19 11:11:50,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:50,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330667719] [2022-07-19 11:11:50,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:50,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:50,516 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 11:11:50,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:50,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330667719] [2022-07-19 11:11:50,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330667719] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:50,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:11:50,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:11:50,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736343895] [2022-07-19 11:11:50,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:50,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:11:50,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:50,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:11:50,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:11:50,518 INFO L87 Difference]: Start difference. First operand 37538 states and 45588 transitions. Second operand has 4 states, 4 states have (on average 61.0) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:51,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:51,682 INFO L93 Difference]: Finished difference Result 71893 states and 87534 transitions. [2022-07-19 11:11:51,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:11:51,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 61.0) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 269 [2022-07-19 11:11:51,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:51,726 INFO L225 Difference]: With dead ends: 71893 [2022-07-19 11:11:51,726 INFO L226 Difference]: Without dead ends: 37605 [2022-07-19 11:11:51,750 INFO L412 NwaCegarLoop]: 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 [2022-07-19 11:11:51,750 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 430 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:51,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 193 Invalid, 1395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 11:11:51,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37605 states. [2022-07-19 11:11:52,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37605 to 36726. [2022-07-19 11:11:52,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36726 states, 36725 states have (on average 1.2159836623553437) internal successors, (44657), 36725 states have internal predecessors, (44657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:52,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36726 states to 36726 states and 44657 transitions. [2022-07-19 11:11:52,179 INFO L78 Accepts]: Start accepts. Automaton has 36726 states and 44657 transitions. Word has length 269 [2022-07-19 11:11:52,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:52,180 INFO L495 AbstractCegarLoop]: Abstraction has 36726 states and 44657 transitions. [2022-07-19 11:11:52,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.0) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:52,180 INFO L276 IsEmpty]: Start isEmpty. Operand 36726 states and 44657 transitions. [2022-07-19 11:11:52,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-07-19 11:11:52,286 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:52,286 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:52,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 11:11:52,286 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:52,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:52,287 INFO L85 PathProgramCache]: Analyzing trace with hash 2084764944, now seen corresponding path program 1 times [2022-07-19 11:11:52,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:52,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490334665] [2022-07-19 11:11:52,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:52,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:52,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:52,366 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 88 proven. 6 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-19 11:11:52,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:52,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490334665] [2022-07-19 11:11:52,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490334665] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:11:52,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681450525] [2022-07-19 11:11:52,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:52,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:11:52,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:11:52,368 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:11:52,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 11:11:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:52,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 11:11:52,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:11:52,523 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 11:11:52,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:11:52,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681450525] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:52,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:11:52,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-19 11:11:52,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725411943] [2022-07-19 11:11:52,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:52,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:52,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:52,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:52,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:11:52,525 INFO L87 Difference]: Start difference. First operand 36726 states and 44657 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:53,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:53,252 INFO L93 Difference]: Finished difference Result 69850 states and 84980 transitions. [2022-07-19 11:11:53,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:53,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 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 [2022-07-19 11:11:53,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:53,291 INFO L225 Difference]: With dead ends: 69850 [2022-07-19 11:11:53,291 INFO L226 Difference]: Without dead ends: 33938 [2022-07-19 11:11:53,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:11:53,314 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 212 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:53,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 363 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:11:53,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33938 states. [2022-07-19 11:11:53,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33938 to 33884. [2022-07-19 11:11:53,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33884 states, 33883 states have (on average 1.2028745978809432) internal successors, (40757), 33883 states have internal predecessors, (40757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:53,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33884 states to 33884 states and 40757 transitions. [2022-07-19 11:11:53,761 INFO L78 Accepts]: Start accepts. Automaton has 33884 states and 40757 transitions. Word has length 276 [2022-07-19 11:11:53,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:53,761 INFO L495 AbstractCegarLoop]: Abstraction has 33884 states and 40757 transitions. [2022-07-19 11:11:53,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:53,762 INFO L276 IsEmpty]: Start isEmpty. Operand 33884 states and 40757 transitions. [2022-07-19 11:11:53,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-07-19 11:11:53,798 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:53,798 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:53,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 11:11:54,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 11:11:54,008 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:54,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:54,008 INFO L85 PathProgramCache]: Analyzing trace with hash 828148250, now seen corresponding path program 1 times [2022-07-19 11:11:54,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:54,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079277627] [2022-07-19 11:11:54,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:54,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:54,125 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 92 proven. 6 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-19 11:11:54,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:54,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079277627] [2022-07-19 11:11:54,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079277627] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:11:54,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382805068] [2022-07-19 11:11:54,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:54,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:11:54,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:11:54,127 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:11:54,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 11:11:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:54,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 11:11:54,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:11:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-19 11:11:54,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:11:54,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382805068] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:54,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:11:54,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-19 11:11:54,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669973031] [2022-07-19 11:11:54,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:54,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:54,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:54,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:54,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:11:54,484 INFO L87 Difference]: Start difference. First operand 33884 states and 40757 transitions. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:55,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:55,231 INFO L93 Difference]: Finished difference Result 70874 states and 86066 transitions. [2022-07-19 11:11:55,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:55,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 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 [2022-07-19 11:11:55,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:55,277 INFO L225 Difference]: With dead ends: 70874 [2022-07-19 11:11:55,278 INFO L226 Difference]: Without dead ends: 39428 [2022-07-19 11:11:55,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:11:55,303 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 45 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:55,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 187 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:11:55,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39428 states. [2022-07-19 11:11:55,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39428 to 39373. [2022-07-19 11:11:55,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39373 states, 39372 states have (on average 1.2134511835822412) internal successors, (47776), 39372 states have internal predecessors, (47776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:55,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39373 states to 39373 states and 47776 transitions. [2022-07-19 11:11:55,839 INFO L78 Accepts]: Start accepts. Automaton has 39373 states and 47776 transitions. Word has length 280 [2022-07-19 11:11:55,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:55,839 INFO L495 AbstractCegarLoop]: Abstraction has 39373 states and 47776 transitions. [2022-07-19 11:11:55,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:55,840 INFO L276 IsEmpty]: Start isEmpty. Operand 39373 states and 47776 transitions. [2022-07-19 11:11:55,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-07-19 11:11:55,874 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:55,874 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:55,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-19 11:11:56,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:11:56,088 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:56,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:56,088 INFO L85 PathProgramCache]: Analyzing trace with hash 902513258, now seen corresponding path program 1 times [2022-07-19 11:11:56,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:56,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859308049] [2022-07-19 11:11:56,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:56,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:56,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:56,188 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 122 proven. 6 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-07-19 11:11:56,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:56,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859308049] [2022-07-19 11:11:56,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859308049] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:11:56,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504992222] [2022-07-19 11:11:56,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:56,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:11:56,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:11:56,191 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:11:56,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 11:11:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:56,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 11:11:56,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:11:56,350 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-19 11:11:56,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:11:56,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504992222] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:56,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:11:56,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-19 11:11:56,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248858674] [2022-07-19 11:11:56,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:56,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:56,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:56,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:56,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:11:56,352 INFO L87 Difference]: Start difference. First operand 39373 states and 47776 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:57,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:57,015 INFO L93 Difference]: Finished difference Result 108703 states and 132129 transitions. [2022-07-19 11:11:57,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:57,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 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 304 [2022-07-19 11:11:57,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:57,099 INFO L225 Difference]: With dead ends: 108703 [2022-07-19 11:11:57,099 INFO L226 Difference]: Without dead ends: 71768 [2022-07-19 11:11:57,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:11:57,116 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 303 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:57,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 917 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 11:11:57,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71768 states. [2022-07-19 11:11:57,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71768 to 70954. [2022-07-19 11:11:57,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70954 states, 70953 states have (on average 1.1937902555212605) internal successors, (84703), 70953 states have internal predecessors, (84703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:57,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70954 states to 70954 states and 84703 transitions. [2022-07-19 11:11:57,880 INFO L78 Accepts]: Start accepts. Automaton has 70954 states and 84703 transitions. Word has length 304 [2022-07-19 11:11:57,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:57,881 INFO L495 AbstractCegarLoop]: Abstraction has 70954 states and 84703 transitions. [2022-07-19 11:11:57,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:57,881 INFO L276 IsEmpty]: Start isEmpty. Operand 70954 states and 84703 transitions. [2022-07-19 11:11:58,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-07-19 11:11:58,133 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:58,134 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:58,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 11:11:58,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:11:58,351 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:58,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:58,352 INFO L85 PathProgramCache]: Analyzing trace with hash 499805069, now seen corresponding path program 1 times [2022-07-19 11:11:58,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:58,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538109203] [2022-07-19 11:11:58,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:58,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:58,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:58,416 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-07-19 11:11:58,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:58,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538109203] [2022-07-19 11:11:58,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538109203] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:58,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:11:58,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:11:58,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974807400] [2022-07-19 11:11:58,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:58,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:58,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:58,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:58,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:58,419 INFO L87 Difference]: Start difference. First operand 70954 states and 84703 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 2 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:59,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:59,486 INFO L93 Difference]: Finished difference Result 156565 states and 186686 transitions. [2022-07-19 11:11:59,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:59,487 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 2 states have internal predecessors, (212), 0 states have call successors, (0), 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 304 [2022-07-19 11:11:59,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:59,590 INFO L225 Difference]: With dead ends: 156565 [2022-07-19 11:11:59,590 INFO L226 Difference]: Without dead ends: 88049 [2022-07-19 11:11:59,630 INFO L412 NwaCegarLoop]: 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 [2022-07-19 11:11:59,630 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 232 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:59,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 164 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:11:59,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88049 states. [2022-07-19 11:12:00,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88049 to 88045. [2022-07-19 11:12:00,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88045 states, 88044 states have (on average 1.1713461451092635) internal successors, (103130), 88044 states have internal predecessors, (103130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:00,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88045 states to 88045 states and 103130 transitions. [2022-07-19 11:12:00,890 INFO L78 Accepts]: Start accepts. Automaton has 88045 states and 103130 transitions. Word has length 304 [2022-07-19 11:12:00,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:00,890 INFO L495 AbstractCegarLoop]: Abstraction has 88045 states and 103130 transitions. [2022-07-19 11:12:00,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 2 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:00,890 INFO L276 IsEmpty]: Start isEmpty. Operand 88045 states and 103130 transitions. [2022-07-19 11:12:00,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-07-19 11:12:00,996 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:00,996 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:00,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 11:12:00,996 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:00,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:00,997 INFO L85 PathProgramCache]: Analyzing trace with hash -728099305, now seen corresponding path program 1 times [2022-07-19 11:12:00,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:00,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568400148] [2022-07-19 11:12:00,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:00,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:01,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 75 proven. 6 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-07-19 11:12:01,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:01,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568400148] [2022-07-19 11:12:01,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568400148] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:12:01,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282586879] [2022-07-19 11:12:01,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:01,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:12:01,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:12:01,077 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:12:01,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 11:12:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:01,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 11:12:01,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:12:01,282 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-19 11:12:01,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:12:01,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282586879] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:01,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:12:01,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-19 11:12:01,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860323887] [2022-07-19 11:12:01,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:01,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:01,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:01,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:01,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:12:01,284 INFO L87 Difference]: Start difference. First operand 88045 states and 103130 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:02,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:02,520 INFO L93 Difference]: Finished difference Result 202668 states and 238273 transitions. [2022-07-19 11:12:02,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:02,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 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 311 [2022-07-19 11:12:02,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:02,687 INFO L225 Difference]: With dead ends: 202668 [2022-07-19 11:12:02,687 INFO L226 Difference]: Without dead ends: 115437 [2022-07-19 11:12:02,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:12:02,741 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 222 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:02,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 171 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:12:02,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115437 states. [2022-07-19 11:12:04,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115437 to 100605. [2022-07-19 11:12:04,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100605 states, 100604 states have (on average 1.127917379030655) internal successors, (113473), 100604 states have internal predecessors, (113473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:04,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100605 states to 100605 states and 113473 transitions. [2022-07-19 11:12:04,380 INFO L78 Accepts]: Start accepts. Automaton has 100605 states and 113473 transitions. Word has length 311 [2022-07-19 11:12:04,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:04,380 INFO L495 AbstractCegarLoop]: Abstraction has 100605 states and 113473 transitions. [2022-07-19 11:12:04,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:04,380 INFO L276 IsEmpty]: Start isEmpty. Operand 100605 states and 113473 transitions. [2022-07-19 11:12:04,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2022-07-19 11:12:04,462 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:04,462 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:04,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-19 11:12:04,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-19 11:12:04,665 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:04,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:04,665 INFO L85 PathProgramCache]: Analyzing trace with hash -2024505437, now seen corresponding path program 1 times [2022-07-19 11:12:04,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:04,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873878397] [2022-07-19 11:12:04,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:04,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:04,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:04,753 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 94 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-07-19 11:12:04,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:04,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873878397] [2022-07-19 11:12:04,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873878397] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:12:04,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216046246] [2022-07-19 11:12:04,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:04,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:12:04,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:12:04,755 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:12:04,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 11:12:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:04,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 11:12:04,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:12:05,090 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-07-19 11:12:05,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:12:05,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216046246] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:05,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:12:05,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-19 11:12:05,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694428725] [2022-07-19 11:12:05,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:05,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:05,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:05,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:05,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:12:05,092 INFO L87 Difference]: Start difference. First operand 100605 states and 113473 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:06,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:06,340 INFO L93 Difference]: Finished difference Result 214147 states and 240630 transitions. [2022-07-19 11:12:06,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:06,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 321 [2022-07-19 11:12:06,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:06,499 INFO L225 Difference]: With dead ends: 214147 [2022-07-19 11:12:06,499 INFO L226 Difference]: Without dead ends: 114153 [2022-07-19 11:12:06,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:12:06,564 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 78 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:06,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 103 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 11:12:06,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114153 states. [2022-07-19 11:12:07,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114153 to 110289. [2022-07-19 11:12:08,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110289 states, 110288 states have (on average 1.1191698099521254) internal successors, (123431), 110288 states have internal predecessors, (123431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:08,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110289 states to 110289 states and 123431 transitions. [2022-07-19 11:12:08,202 INFO L78 Accepts]: Start accepts. Automaton has 110289 states and 123431 transitions. Word has length 321 [2022-07-19 11:12:08,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:08,203 INFO L495 AbstractCegarLoop]: Abstraction has 110289 states and 123431 transitions. [2022-07-19 11:12:08,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:08,203 INFO L276 IsEmpty]: Start isEmpty. Operand 110289 states and 123431 transitions. [2022-07-19 11:12:08,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-07-19 11:12:08,513 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:08,513 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:08,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 11:12:08,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 11:12:08,731 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:08,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:08,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1934345327, now seen corresponding path program 1 times [2022-07-19 11:12:08,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:08,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101591671] [2022-07-19 11:12:08,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:08,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:08,820 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 93 proven. 6 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-19 11:12:08,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:08,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101591671] [2022-07-19 11:12:08,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101591671] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:12:08,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080827649] [2022-07-19 11:12:08,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:08,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:12:08,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:12:08,823 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:12:08,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 11:12:08,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:08,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 11:12:08,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:12:09,074 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 180 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 11:12:09,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 11:12:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 180 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 11:12:09,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080827649] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 11:12:09,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 11:12:09,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 6 [2022-07-19 11:12:09,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079646511] [2022-07-19 11:12:09,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 11:12:09,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 11:12:09,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:09,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 11:12:09,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 11:12:09,157 INFO L87 Difference]: Start difference. First operand 110289 states and 123431 transitions. Second operand has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:13,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:13,241 INFO L93 Difference]: Finished difference Result 381045 states and 428412 transitions. [2022-07-19 11:12:13,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 11:12:13,242 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 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 324 [2022-07-19 11:12:13,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:13,624 INFO L225 Difference]: With dead ends: 381045 [2022-07-19 11:12:13,624 INFO L226 Difference]: Without dead ends: 271367 [2022-07-19 11:12:13,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 663 GetRequests, 652 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-07-19 11:12:13,663 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 2833 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 3877 mSolverCounterSat, 739 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2833 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 4616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 739 IncrementalHoareTripleChecker+Valid, 3877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:13,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2833 Valid, 378 Invalid, 4616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [739 Valid, 3877 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-19 11:12:13,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271367 states. [2022-07-19 11:12:17,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271367 to 259278. [2022-07-19 11:12:17,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259278 states, 259277 states have (on average 1.1074835022003495) internal successors, (287145), 259277 states have internal predecessors, (287145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:17,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259278 states to 259278 states and 287145 transitions. [2022-07-19 11:12:17,485 INFO L78 Accepts]: Start accepts. Automaton has 259278 states and 287145 transitions. Word has length 324 [2022-07-19 11:12:17,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:17,485 INFO L495 AbstractCegarLoop]: Abstraction has 259278 states and 287145 transitions. [2022-07-19 11:12:17,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:17,485 INFO L276 IsEmpty]: Start isEmpty. Operand 259278 states and 287145 transitions. [2022-07-19 11:12:17,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-07-19 11:12:17,567 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:17,567 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:17,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-19 11:12:17,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:12:17,776 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:17,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:17,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1568167906, now seen corresponding path program 1 times [2022-07-19 11:12:17,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:17,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562351774] [2022-07-19 11:12:17,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:17,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:17,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:17,876 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-19 11:12:17,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:17,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562351774] [2022-07-19 11:12:17,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562351774] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:17,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:17,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:12:17,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937401370] [2022-07-19 11:12:17,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:17,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:12:17,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:17,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:12:17,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:12:17,880 INFO L87 Difference]: Start difference. First operand 259278 states and 287145 transitions. Second operand has 4 states, 4 states have (on average 75.5) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:20,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:20,639 INFO L93 Difference]: Finished difference Result 529831 states and 586923 transitions. [2022-07-19 11:12:20,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:12:20,640 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.5) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 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 359 [2022-07-19 11:12:20,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:20,992 INFO L225 Difference]: With dead ends: 529831 [2022-07-19 11:12:20,993 INFO L226 Difference]: Without dead ends: 271164 [2022-07-19 11:12:21,072 INFO L412 NwaCegarLoop]: 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 [2022-07-19 11:12:21,073 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 354 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:21,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 168 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 1192 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-19 11:12:21,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271164 states. [2022-07-19 11:12:24,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271164 to 257263. [2022-07-19 11:12:24,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257263 states, 257262 states have (on average 1.1078239304677722) internal successors, (285001), 257262 states have internal predecessors, (285001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:25,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257263 states to 257263 states and 285001 transitions. [2022-07-19 11:12:25,198 INFO L78 Accepts]: Start accepts. Automaton has 257263 states and 285001 transitions. Word has length 359 [2022-07-19 11:12:25,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:25,198 INFO L495 AbstractCegarLoop]: Abstraction has 257263 states and 285001 transitions. [2022-07-19 11:12:25,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.5) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:25,198 INFO L276 IsEmpty]: Start isEmpty. Operand 257263 states and 285001 transitions. [2022-07-19 11:12:25,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2022-07-19 11:12:25,278 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:25,278 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:25,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 11:12:25,278 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:25,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:25,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1583047911, now seen corresponding path program 1 times [2022-07-19 11:12:25,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:25,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238197440] [2022-07-19 11:12:25,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:25,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:25,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:25,357 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-19 11:12:25,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:25,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238197440] [2022-07-19 11:12:25,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238197440] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:25,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:25,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:12:25,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922488444] [2022-07-19 11:12:25,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:25,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:12:25,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:25,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:12:25,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:12:25,359 INFO L87 Difference]: Start difference. First operand 257263 states and 285001 transitions. Second operand has 4 states, 4 states have (on average 61.0) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:27,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:27,395 INFO L93 Difference]: Finished difference Result 494017 states and 546673 transitions. [2022-07-19 11:12:27,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:12:27,395 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 61.0) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 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 361 [2022-07-19 11:12:27,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:27,755 INFO L225 Difference]: With dead ends: 494017 [2022-07-19 11:12:27,755 INFO L226 Difference]: Without dead ends: 237365 [2022-07-19 11:12:27,872 INFO L412 NwaCegarLoop]: 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 [2022-07-19 11:12:27,872 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 534 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:27,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 395 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:12:28,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237365 states. [2022-07-19 11:12:31,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237365 to 236945. [2022-07-19 11:12:31,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236945 states, 236944 states have (on average 1.1043368897292187) internal successors, (261666), 236944 states have internal predecessors, (261666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:31,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236945 states to 236945 states and 261666 transitions. [2022-07-19 11:12:31,556 INFO L78 Accepts]: Start accepts. Automaton has 236945 states and 261666 transitions. Word has length 361 [2022-07-19 11:12:31,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:31,556 INFO L495 AbstractCegarLoop]: Abstraction has 236945 states and 261666 transitions. [2022-07-19 11:12:31,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.0) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:31,556 INFO L276 IsEmpty]: Start isEmpty. Operand 236945 states and 261666 transitions. [2022-07-19 11:12:31,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2022-07-19 11:12:31,631 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:31,631 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:31,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-19 11:12:31,632 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:31,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:31,632 INFO L85 PathProgramCache]: Analyzing trace with hash 2069341334, now seen corresponding path program 1 times [2022-07-19 11:12:31,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:31,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410789751] [2022-07-19 11:12:31,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:31,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:32,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:32,220 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 175 proven. 6 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-19 11:12:32,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:32,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410789751] [2022-07-19 11:12:32,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410789751] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:12:32,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196121503] [2022-07-19 11:12:32,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:32,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:12:32,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:12:32,232 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:12:32,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 11:12:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:32,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 11:12:32,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:12:32,514 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 234 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-19 11:12:32,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:12:32,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196121503] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:32,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:12:32,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-19 11:12:32,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988508879] [2022-07-19 11:12:32,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:32,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:32,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:32,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:32,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:12:32,516 INFO L87 Difference]: Start difference. First operand 236945 states and 261666 transitions. Second operand has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)