./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem16_label15.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/Problem16_label15.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 04841d1aba9375b8a6b06dc8afee8df1fa6191c086b63f3a4a476e022f53e582 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 11:17:11,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:17:11,637 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:17:11,690 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:17:11,690 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:17:11,693 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:17:11,694 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:17:11,697 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:17:11,699 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:17:11,703 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:17:11,704 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:17:11,705 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:17:11,705 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:17:11,705 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:17:11,706 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:17:11,707 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:17:11,708 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:17:11,708 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:17:11,709 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:17:11,711 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:17:11,712 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:17:11,713 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:17:11,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:17:11,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:17:11,722 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:17:11,723 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:17:11,723 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:17:11,724 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:17:11,724 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:17:11,725 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:17:11,726 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:17:11,726 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:17:11,728 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:17:11,729 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:17:11,730 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:17:11,730 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:17:11,730 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:17:11,731 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:17:11,731 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:17:11,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:17:11,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:17:11,733 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 11:17:11,761 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:17:11,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:17:11,762 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:17:11,762 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:17:11,763 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:17:11,763 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:17:11,764 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:17:11,764 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:17:11,764 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:17:11,764 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:17:11,765 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:17:11,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 11:17:11,766 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:17:11,766 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:17:11,766 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:17:11,766 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:17:11,766 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:17:11,766 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:17:11,767 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:17:11,767 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:17:11,767 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:17:11,767 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:17:11,767 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:17:11,768 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:17:11,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:17:11,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:17:11,768 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:17:11,769 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:17:11,770 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 11:17:11,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 11:17:11,770 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:17:11,770 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:17:11,770 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:17:11,771 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:17:11,771 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 04841d1aba9375b8a6b06dc8afee8df1fa6191c086b63f3a4a476e022f53e582 [2021-12-21 11:17:11,996 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:17:12,018 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:17:12,021 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:17:12,021 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:17:12,022 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:17:12,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label15.c [2021-12-21 11:17:12,077 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdb8fea9a/44feca53ed994509a858a7756fa4e285/FLAG43b2f16c2 [2021-12-21 11:17:12,634 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:17:12,635 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label15.c [2021-12-21 11:17:12,653 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdb8fea9a/44feca53ed994509a858a7756fa4e285/FLAG43b2f16c2 [2021-12-21 11:17:13,100 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdb8fea9a/44feca53ed994509a858a7756fa4e285 [2021-12-21 11:17:13,103 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:17:13,104 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:17:13,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:17:13,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:17:13,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:17:13,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:17:13" (1/1) ... [2021-12-21 11:17:13,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58eb6926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:13, skipping insertion in model container [2021-12-21 11:17:13,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:17:13" (1/1) ... [2021-12-21 11:17:13,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:17:13,175 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:17:13,397 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/Problem16_label15.c[2501,2514] [2021-12-21 11:17:13,698 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:17:13,705 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:17:13,730 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/Problem16_label15.c[2501,2514] [2021-12-21 11:17:13,909 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:17:13,922 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:17:13,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:13 WrapperNode [2021-12-21 11:17:13,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:17:13,924 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:17:13,924 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:17:13,924 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:17:13,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:13" (1/1) ... [2021-12-21 11:17:13,967 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:13" (1/1) ... [2021-12-21 11:17:14,104 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1768 [2021-12-21 11:17:14,105 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:17:14,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:17:14,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:17:14,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:17:14,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:13" (1/1) ... [2021-12-21 11:17:14,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:13" (1/1) ... [2021-12-21 11:17:14,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:13" (1/1) ... [2021-12-21 11:17:14,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:13" (1/1) ... [2021-12-21 11:17:14,237 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:13" (1/1) ... [2021-12-21 11:17:14,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:13" (1/1) ... [2021-12-21 11:17:14,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:13" (1/1) ... [2021-12-21 11:17:14,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:17:14,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:17:14,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:17:14,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:17:14,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:13" (1/1) ... [2021-12-21 11:17:14,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:17:14,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:17:14,336 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 11:17:14,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 11:17:14,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:17:14,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 11:17:14,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:17:14,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:17:14,441 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:17:14,443 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:17:16,024 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:17:16,033 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:17:16,033 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 11:17:16,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:17:16 BoogieIcfgContainer [2021-12-21 11:17:16,035 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:17:16,037 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:17:16,037 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:17:16,039 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:17:16,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:17:13" (1/3) ... [2021-12-21 11:17:16,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@384a72db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:17:16, skipping insertion in model container [2021-12-21 11:17:16,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:13" (2/3) ... [2021-12-21 11:17:16,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@384a72db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:17:16, skipping insertion in model container [2021-12-21 11:17:16,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:17:16" (3/3) ... [2021-12-21 11:17:16,042 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16_label15.c [2021-12-21 11:17:16,046 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:17:16,046 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 11:17:16,096 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:17:16,102 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 11:17:16,102 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 11:17:16,120 INFO L276 IsEmpty]: Start isEmpty. Operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:16,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-21 11:17:16,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:16,125 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:16,126 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:16,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:16,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1644072970, now seen corresponding path program 1 times [2021-12-21 11:17:16,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:16,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248984711] [2021-12-21 11:17:16,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:16,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:16,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:17:16,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:16,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248984711] [2021-12-21 11:17:16,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248984711] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:16,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:16,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:17:16,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043302122] [2021-12-21 11:17:16,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:16,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:16,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:16,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:16,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:16,362 INFO L87 Difference]: Start difference. First operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 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 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:17,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:17,796 INFO L93 Difference]: Finished difference Result 1137 states and 2118 transitions. [2021-12-21 11:17:17,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:17,799 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-12-21 11:17:17,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:17,813 INFO L225 Difference]: With dead ends: 1137 [2021-12-21 11:17:17,813 INFO L226 Difference]: Without dead ends: 662 [2021-12-21 11:17:17,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:17,821 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 364 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:17,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 60 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 11:17:17,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-12-21 11:17:17,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2021-12-21 11:17:17,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.7639939485627836) internal successors, (1166), 661 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:17,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1166 transitions. [2021-12-21 11:17:17,885 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1166 transitions. Word has length 22 [2021-12-21 11:17:17,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:17,886 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1166 transitions. [2021-12-21 11:17:17,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:17,886 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1166 transitions. [2021-12-21 11:17:17,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-21 11:17:17,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:17,889 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 11:17:17,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 11:17:17,889 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:17,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:17,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1637501072, now seen corresponding path program 1 times [2021-12-21 11:17:17,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:17,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36103493] [2021-12-21 11:17:17,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:17,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:17,993 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:17:17,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:17,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36103493] [2021-12-21 11:17:17,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36103493] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:17,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:17,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:17:17,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910772027] [2021-12-21 11:17:17,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:17,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:17,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:17,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:17,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:17,997 INFO L87 Difference]: Start difference. First operand 662 states and 1166 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:19,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:19,350 INFO L93 Difference]: Finished difference Result 1980 states and 3493 transitions. [2021-12-21 11:17:19,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:19,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-12-21 11:17:19,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:19,357 INFO L225 Difference]: With dead ends: 1980 [2021-12-21 11:17:19,357 INFO L226 Difference]: Without dead ends: 1320 [2021-12-21 11:17:19,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:19,361 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 344 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:19,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 77 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 11:17:19,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2021-12-21 11:17:19,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1320. [2021-12-21 11:17:19,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 1.6656557998483699) internal successors, (2197), 1319 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:19,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 2197 transitions. [2021-12-21 11:17:19,395 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 2197 transitions. Word has length 87 [2021-12-21 11:17:19,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:19,396 INFO L470 AbstractCegarLoop]: Abstraction has 1320 states and 2197 transitions. [2021-12-21 11:17:19,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:19,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 2197 transitions. [2021-12-21 11:17:19,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-21 11:17:19,398 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:19,399 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 11:17:19,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 11:17:19,399 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:19,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:19,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1946453316, now seen corresponding path program 1 times [2021-12-21 11:17:19,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:19,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418752161] [2021-12-21 11:17:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:19,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:19,514 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:17:19,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:19,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418752161] [2021-12-21 11:17:19,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418752161] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:19,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:19,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:17:19,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331070153] [2021-12-21 11:17:19,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:19,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:19,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:19,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:19,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:19,517 INFO L87 Difference]: Start difference. First operand 1320 states and 2197 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:20,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:20,990 INFO L93 Difference]: Finished difference Result 3625 states and 6017 transitions. [2021-12-21 11:17:20,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:20,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-21 11:17:20,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:20,999 INFO L225 Difference]: With dead ends: 3625 [2021-12-21 11:17:20,999 INFO L226 Difference]: Without dead ends: 2307 [2021-12-21 11:17:21,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:21,003 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 282 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:21,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 120 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 11:17:21,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2021-12-21 11:17:21,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 2307. [2021-12-21 11:17:21,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 2306 states have (on average 1.5923677363399826) internal successors, (3672), 2306 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:21,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 3672 transitions. [2021-12-21 11:17:21,044 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 3672 transitions. Word has length 90 [2021-12-21 11:17:21,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:21,044 INFO L470 AbstractCegarLoop]: Abstraction has 2307 states and 3672 transitions. [2021-12-21 11:17:21,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:21,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 3672 transitions. [2021-12-21 11:17:21,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-21 11:17:21,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:21,047 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 11:17:21,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 11:17:21,047 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:21,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:21,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1572118148, now seen corresponding path program 1 times [2021-12-21 11:17:21,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:21,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466617908] [2021-12-21 11:17:21,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:21,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:21,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:17:21,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:21,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466617908] [2021-12-21 11:17:21,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466617908] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:21,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:21,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:17:21,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572956427] [2021-12-21 11:17:21,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:21,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:17:21,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:21,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:17:21,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:17:21,193 INFO L87 Difference]: Start difference. First operand 2307 states and 3672 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:23,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:23,495 INFO L93 Difference]: Finished difference Result 6257 states and 9781 transitions. [2021-12-21 11:17:23,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:17:23,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2021-12-21 11:17:23,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:23,509 INFO L225 Difference]: With dead ends: 6257 [2021-12-21 11:17:23,509 INFO L226 Difference]: Without dead ends: 3952 [2021-12-21 11:17:23,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:17:23,512 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 883 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 2130 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 2387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 2130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:23,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [883 Valid, 192 Invalid, 2387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 2130 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-21 11:17:23,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3952 states. [2021-12-21 11:17:23,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 3952. [2021-12-21 11:17:23,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3952 states, 3951 states have (on average 1.4302708175145533) internal successors, (5651), 3951 states have internal predecessors, (5651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:23,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3952 states to 3952 states and 5651 transitions. [2021-12-21 11:17:23,580 INFO L78 Accepts]: Start accepts. Automaton has 3952 states and 5651 transitions. Word has length 95 [2021-12-21 11:17:23,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:23,581 INFO L470 AbstractCegarLoop]: Abstraction has 3952 states and 5651 transitions. [2021-12-21 11:17:23,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:23,581 INFO L276 IsEmpty]: Start isEmpty. Operand 3952 states and 5651 transitions. [2021-12-21 11:17:23,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-21 11:17:23,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:23,591 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 11:17:23,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 11:17:23,591 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:23,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:23,594 INFO L85 PathProgramCache]: Analyzing trace with hash -412895463, now seen corresponding path program 1 times [2021-12-21 11:17:23,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:23,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313129835] [2021-12-21 11:17:23,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:23,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:23,697 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-21 11:17:23,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:23,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313129835] [2021-12-21 11:17:23,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313129835] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:23,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:23,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:17:23,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526555928] [2021-12-21 11:17:23,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:23,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:23,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:23,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:23,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:23,702 INFO L87 Difference]: Start difference. First operand 3952 states and 5651 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:24,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:24,813 INFO L93 Difference]: Finished difference Result 10534 states and 15386 transitions. [2021-12-21 11:17:24,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:24,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 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 109 [2021-12-21 11:17:24,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:24,836 INFO L225 Difference]: With dead ends: 10534 [2021-12-21 11:17:24,837 INFO L226 Difference]: Without dead ends: 6913 [2021-12-21 11:17:24,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:24,843 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 265 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:24,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 223 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 11:17:24,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6913 states. [2021-12-21 11:17:24,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6913 to 6913. [2021-12-21 11:17:24,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6913 states, 6912 states have (on average 1.3075810185185186) internal successors, (9038), 6912 states have internal predecessors, (9038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:24,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6913 states to 6913 states and 9038 transitions. [2021-12-21 11:17:24,953 INFO L78 Accepts]: Start accepts. Automaton has 6913 states and 9038 transitions. Word has length 109 [2021-12-21 11:17:24,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:24,954 INFO L470 AbstractCegarLoop]: Abstraction has 6913 states and 9038 transitions. [2021-12-21 11:17:24,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:24,954 INFO L276 IsEmpty]: Start isEmpty. Operand 6913 states and 9038 transitions. [2021-12-21 11:17:24,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-12-21 11:17:24,958 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:24,958 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:24,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 11:17:24,959 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:24,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:24,959 INFO L85 PathProgramCache]: Analyzing trace with hash 353216239, now seen corresponding path program 1 times [2021-12-21 11:17:24,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:24,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963425455] [2021-12-21 11:17:24,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:24,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:25,052 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 200 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-21 11:17:25,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:25,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963425455] [2021-12-21 11:17:25,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963425455] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:25,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:25,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:17:25,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090087140] [2021-12-21 11:17:25,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:25,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:25,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:25,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:25,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:25,055 INFO L87 Difference]: Start difference. First operand 6913 states and 9038 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:26,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:26,196 INFO L93 Difference]: Finished difference Result 16456 states and 21649 transitions. [2021-12-21 11:17:26,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:26,196 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 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 271 [2021-12-21 11:17:26,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:26,221 INFO L225 Difference]: With dead ends: 16456 [2021-12-21 11:17:26,221 INFO L226 Difference]: Without dead ends: 9874 [2021-12-21 11:17:26,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:26,236 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 358 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:26,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 156 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 11:17:26,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9874 states. [2021-12-21 11:17:26,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9874 to 8887. [2021-12-21 11:17:26,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8887 states, 8886 states have (on average 1.198852126941256) internal successors, (10653), 8886 states have internal predecessors, (10653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:26,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8887 states to 8887 states and 10653 transitions. [2021-12-21 11:17:26,381 INFO L78 Accepts]: Start accepts. Automaton has 8887 states and 10653 transitions. Word has length 271 [2021-12-21 11:17:26,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:26,382 INFO L470 AbstractCegarLoop]: Abstraction has 8887 states and 10653 transitions. [2021-12-21 11:17:26,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:26,382 INFO L276 IsEmpty]: Start isEmpty. Operand 8887 states and 10653 transitions. [2021-12-21 11:17:26,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2021-12-21 11:17:26,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:26,409 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-21 11:17:26,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 11:17:26,409 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:26,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:26,410 INFO L85 PathProgramCache]: Analyzing trace with hash -710155352, now seen corresponding path program 1 times [2021-12-21 11:17:26,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:26,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157535329] [2021-12-21 11:17:26,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:26,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:26,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:26,671 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 270 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-21 11:17:26,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:26,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157535329] [2021-12-21 11:17:26,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157535329] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:26,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:26,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 11:17:26,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820493083] [2021-12-21 11:17:26,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:26,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 11:17:26,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:26,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 11:17:26,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:17:26,674 INFO L87 Difference]: Start difference. First operand 8887 states and 10653 transitions. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 6 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:28,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:28,409 INFO L93 Difference]: Finished difference Result 17033 states and 20511 transitions. [2021-12-21 11:17:28,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 11:17:28,410 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 6 states have internal predecessors, (395), 0 states have call successors, (0), 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 465 [2021-12-21 11:17:28,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:28,425 INFO L225 Difference]: With dead ends: 17033 [2021-12-21 11:17:28,425 INFO L226 Difference]: Without dead ends: 8558 [2021-12-21 11:17:28,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:17:28,434 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 364 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1778 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 2273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 1778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:28,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 289 Invalid, 2273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 1778 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-21 11:17:28,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8558 states. [2021-12-21 11:17:28,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8558 to 8558. [2021-12-21 11:17:28,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8558 states, 8557 states have (on average 1.0805188734369522) internal successors, (9246), 8557 states have internal predecessors, (9246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:28,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8558 states to 8558 states and 9246 transitions. [2021-12-21 11:17:28,547 INFO L78 Accepts]: Start accepts. Automaton has 8558 states and 9246 transitions. Word has length 465 [2021-12-21 11:17:28,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:28,547 INFO L470 AbstractCegarLoop]: Abstraction has 8558 states and 9246 transitions. [2021-12-21 11:17:28,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 6 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:28,548 INFO L276 IsEmpty]: Start isEmpty. Operand 8558 states and 9246 transitions. [2021-12-21 11:17:28,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2021-12-21 11:17:28,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:28,557 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:28,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 11:17:28,558 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:28,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:28,561 INFO L85 PathProgramCache]: Analyzing trace with hash -997233398, now seen corresponding path program 1 times [2021-12-21 11:17:28,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:28,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256757908] [2021-12-21 11:17:28,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:28,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:28,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:28,826 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 280 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-21 11:17:28,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:28,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256757908] [2021-12-21 11:17:28,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256757908] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:28,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:28,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:17:28,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873863253] [2021-12-21 11:17:28,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:28,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:28,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:28,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:28,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:28,829 INFO L87 Difference]: Start difference. First operand 8558 states and 9246 transitions. Second operand has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:29,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:29,684 INFO L93 Difference]: Finished difference Result 20075 states and 21838 transitions. [2021-12-21 11:17:29,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:29,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 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 493 [2021-12-21 11:17:29,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:29,704 INFO L225 Difference]: With dead ends: 20075 [2021-12-21 11:17:29,704 INFO L226 Difference]: Without dead ends: 12177 [2021-12-21 11:17:29,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:29,714 INFO L933 BasicCegarLoop]: 428 mSDtfsCounter, 219 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:29,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 434 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 11:17:29,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12177 states. [2021-12-21 11:17:29,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12177 to 11190. [2021-12-21 11:17:29,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11190 states, 11189 states have (on average 1.0665832514076325) internal successors, (11934), 11189 states have internal predecessors, (11934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:29,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11190 states to 11190 states and 11934 transitions. [2021-12-21 11:17:29,866 INFO L78 Accepts]: Start accepts. Automaton has 11190 states and 11934 transitions. Word has length 493 [2021-12-21 11:17:29,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:29,867 INFO L470 AbstractCegarLoop]: Abstraction has 11190 states and 11934 transitions. [2021-12-21 11:17:29,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:29,867 INFO L276 IsEmpty]: Start isEmpty. Operand 11190 states and 11934 transitions. [2021-12-21 11:17:29,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2021-12-21 11:17:29,906 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:29,906 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:29,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 11:17:29,906 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:29,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:29,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1203842898, now seen corresponding path program 1 times [2021-12-21 11:17:29,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:29,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953759122] [2021-12-21 11:17:29,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:29,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:30,092 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 476 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-21 11:17:30,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:30,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953759122] [2021-12-21 11:17:30,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953759122] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:30,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:30,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:17:30,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499531591] [2021-12-21 11:17:30,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:30,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:30,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:30,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:30,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:30,096 INFO L87 Difference]: Start difference. First operand 11190 states and 11934 transitions. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:31,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:31,015 INFO L93 Difference]: Finished difference Result 25339 states and 27234 transitions. [2021-12-21 11:17:31,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:31,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 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 556 [2021-12-21 11:17:31,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:31,038 INFO L225 Difference]: With dead ends: 25339 [2021-12-21 11:17:31,039 INFO L226 Difference]: Without dead ends: 14480 [2021-12-21 11:17:31,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:31,053 INFO L933 BasicCegarLoop]: 414 mSDtfsCounter, 176 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:31,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 420 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 11:17:31,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14480 states. [2021-12-21 11:17:31,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14480 to 11848. [2021-12-21 11:17:31,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11848 states, 11847 states have (on average 1.066008272136406) internal successors, (12629), 11847 states have internal predecessors, (12629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:31,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11848 states to 11848 states and 12629 transitions. [2021-12-21 11:17:31,226 INFO L78 Accepts]: Start accepts. Automaton has 11848 states and 12629 transitions. Word has length 556 [2021-12-21 11:17:31,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:31,227 INFO L470 AbstractCegarLoop]: Abstraction has 11848 states and 12629 transitions. [2021-12-21 11:17:31,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:31,228 INFO L276 IsEmpty]: Start isEmpty. Operand 11848 states and 12629 transitions. [2021-12-21 11:17:31,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 855 [2021-12-21 11:17:31,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:31,241 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:31,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 11:17:31,242 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:31,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:31,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1981113525, now seen corresponding path program 1 times [2021-12-21 11:17:31,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:31,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059491321] [2021-12-21 11:17:31,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:31,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:31,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 903 proven. 0 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2021-12-21 11:17:31,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:31,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059491321] [2021-12-21 11:17:31,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059491321] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:31,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:31,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:17:31,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783124561] [2021-12-21 11:17:31,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:31,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:31,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:31,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:31,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:31,614 INFO L87 Difference]: Start difference. First operand 11848 states and 12629 transitions. Second operand has 3 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:32,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:32,396 INFO L93 Difference]: Finished difference Result 25997 states and 27902 transitions. [2021-12-21 11:17:32,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:32,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 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 854 [2021-12-21 11:17:32,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:32,421 INFO L225 Difference]: With dead ends: 25997 [2021-12-21 11:17:32,422 INFO L226 Difference]: Without dead ends: 14480 [2021-12-21 11:17:32,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:32,435 INFO L933 BasicCegarLoop]: 436 mSDtfsCounter, 193 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:32,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 441 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 11:17:32,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14480 states. [2021-12-21 11:17:32,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14480 to 14151. [2021-12-21 11:17:32,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14151 states, 14150 states have (on average 1.06113074204947) internal successors, (15015), 14150 states have internal predecessors, (15015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:32,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14151 states to 14151 states and 15015 transitions. [2021-12-21 11:17:32,634 INFO L78 Accepts]: Start accepts. Automaton has 14151 states and 15015 transitions. Word has length 854 [2021-12-21 11:17:32,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:32,635 INFO L470 AbstractCegarLoop]: Abstraction has 14151 states and 15015 transitions. [2021-12-21 11:17:32,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:32,636 INFO L276 IsEmpty]: Start isEmpty. Operand 14151 states and 15015 transitions. [2021-12-21 11:17:32,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 880 [2021-12-21 11:17:32,655 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:32,655 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:32,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 11:17:32,656 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:32,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:32,657 INFO L85 PathProgramCache]: Analyzing trace with hash -28368251, now seen corresponding path program 1 times [2021-12-21 11:17:32,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:32,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903941557] [2021-12-21 11:17:32,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:32,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 427 proven. 627 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2021-12-21 11:17:33,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:33,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903941557] [2021-12-21 11:17:33,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903941557] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:17:33,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982079137] [2021-12-21 11:17:33,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:33,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:17:33,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:17:33,083 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:17:33,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 11:17:33,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:33,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:17:33,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:17:34,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 583 proven. 0 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2021-12-21 11:17:34,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:17:34,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982079137] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:34,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:17:34,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-21 11:17:34,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086303677] [2021-12-21 11:17:34,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:34,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:34,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:34,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:34,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:17:34,611 INFO L87 Difference]: Start difference. First operand 14151 states and 15015 transitions. Second operand has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:35,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:35,353 INFO L93 Difference]: Finished difference Result 27971 states and 29697 transitions. [2021-12-21 11:17:35,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:35,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 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 879 [2021-12-21 11:17:35,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:35,372 INFO L225 Difference]: With dead ends: 27971 [2021-12-21 11:17:35,372 INFO L226 Difference]: Without dead ends: 14151 [2021-12-21 11:17:35,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 883 GetRequests, 879 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:17:35,385 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 226 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:35,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 377 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 11:17:35,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14151 states. [2021-12-21 11:17:35,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14151 to 14151. [2021-12-21 11:17:35,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14151 states, 14150 states have (on average 1.052155477031802) internal successors, (14888), 14150 states have internal predecessors, (14888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:35,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14151 states to 14151 states and 14888 transitions. [2021-12-21 11:17:35,594 INFO L78 Accepts]: Start accepts. Automaton has 14151 states and 14888 transitions. Word has length 879 [2021-12-21 11:17:35,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:35,596 INFO L470 AbstractCegarLoop]: Abstraction has 14151 states and 14888 transitions. [2021-12-21 11:17:35,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:35,596 INFO L276 IsEmpty]: Start isEmpty. Operand 14151 states and 14888 transitions. [2021-12-21 11:17:35,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1036 [2021-12-21 11:17:35,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:35,617 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:35,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 11:17:35,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-21 11:17:35,842 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:35,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:35,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1898760989, now seen corresponding path program 1 times [2021-12-21 11:17:35,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:35,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596322435] [2021-12-21 11:17:35,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:35,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:36,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2096 backedges. 1165 proven. 0 refuted. 0 times theorem prover too weak. 931 trivial. 0 not checked. [2021-12-21 11:17:36,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:36,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596322435] [2021-12-21 11:17:36,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596322435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:36,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:36,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:17:36,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664483490] [2021-12-21 11:17:36,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:36,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:36,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:36,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:36,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:36,248 INFO L87 Difference]: Start difference. First operand 14151 states and 14888 transitions. Second operand has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:37,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:37,097 INFO L93 Difference]: Finished difference Result 29616 states and 31116 transitions. [2021-12-21 11:17:37,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:37,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 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 1035 [2021-12-21 11:17:37,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:37,116 INFO L225 Difference]: With dead ends: 29616 [2021-12-21 11:17:37,116 INFO L226 Difference]: Without dead ends: 14151 [2021-12-21 11:17:37,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:37,128 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 182 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:37,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 428 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 11:17:37,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14151 states. [2021-12-21 11:17:37,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14151 to 14151. [2021-12-21 11:17:37,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14151 states, 14150 states have (on average 1.0356890459363957) internal successors, (14655), 14150 states have internal predecessors, (14655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:37,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14151 states to 14151 states and 14655 transitions. [2021-12-21 11:17:37,370 INFO L78 Accepts]: Start accepts. Automaton has 14151 states and 14655 transitions. Word has length 1035 [2021-12-21 11:17:37,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:37,371 INFO L470 AbstractCegarLoop]: Abstraction has 14151 states and 14655 transitions. [2021-12-21 11:17:37,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:37,372 INFO L276 IsEmpty]: Start isEmpty. Operand 14151 states and 14655 transitions. [2021-12-21 11:17:37,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1426 [2021-12-21 11:17:37,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:37,401 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:37,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 11:17:37,401 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:37,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:37,402 INFO L85 PathProgramCache]: Analyzing trace with hash 2061150774, now seen corresponding path program 1 times [2021-12-21 11:17:37,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:37,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631166539] [2021-12-21 11:17:37,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:37,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:37,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3146 backedges. 2327 proven. 0 refuted. 0 times theorem prover too weak. 819 trivial. 0 not checked. [2021-12-21 11:17:38,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:38,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631166539] [2021-12-21 11:17:38,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631166539] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:38,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:38,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 11:17:38,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586621753] [2021-12-21 11:17:38,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:38,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 11:17:38,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:38,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 11:17:38,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:17:38,041 INFO L87 Difference]: Start difference. First operand 14151 states and 14655 transitions. Second operand has 5 states, 5 states have (on average 164.0) internal successors, (820), 5 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:39,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:39,639 INFO L93 Difference]: Finished difference Result 28638 states and 29651 transitions. [2021-12-21 11:17:39,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 11:17:39,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 164.0) internal successors, (820), 5 states have internal predecessors, (820), 0 states have call successors, (0), 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 1425 [2021-12-21 11:17:39,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:39,652 INFO L225 Difference]: With dead ends: 28638 [2021-12-21 11:17:39,653 INFO L226 Difference]: Without dead ends: 14818 [2021-12-21 11:17:39,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:17:39,661 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 602 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 2474 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 2515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:39,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 446 Invalid, 2515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2474 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 11:17:39,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14818 states. [2021-12-21 11:17:39,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14818 to 14151. [2021-12-21 11:17:39,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14151 states, 14150 states have (on average 1.0346289752650177) internal successors, (14640), 14150 states have internal predecessors, (14640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:39,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14151 states to 14151 states and 14640 transitions. [2021-12-21 11:17:39,796 INFO L78 Accepts]: Start accepts. Automaton has 14151 states and 14640 transitions. Word has length 1425 [2021-12-21 11:17:39,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:39,797 INFO L470 AbstractCegarLoop]: Abstraction has 14151 states and 14640 transitions. [2021-12-21 11:17:39,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 164.0) internal successors, (820), 5 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:39,798 INFO L276 IsEmpty]: Start isEmpty. Operand 14151 states and 14640 transitions. [2021-12-21 11:17:39,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1526 [2021-12-21 11:17:39,828 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:39,829 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:39,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 11:17:39,829 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:39,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:39,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1584237030, now seen corresponding path program 1 times [2021-12-21 11:17:39,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:39,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746405305] [2021-12-21 11:17:39,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:39,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:40,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:40,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4894 backedges. 3113 proven. 0 refuted. 0 times theorem prover too weak. 1781 trivial. 0 not checked. [2021-12-21 11:17:40,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:40,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746405305] [2021-12-21 11:17:40,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746405305] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:40,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:40,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:17:40,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828600674] [2021-12-21 11:17:40,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:40,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:40,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:40,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:40,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:40,493 INFO L87 Difference]: Start difference. First operand 14151 states and 14640 transitions. Second operand has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:41,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:41,374 INFO L93 Difference]: Finished difference Result 28629 states and 29641 transitions. [2021-12-21 11:17:41,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:41,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 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 1525 [2021-12-21 11:17:41,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:41,392 INFO L225 Difference]: With dead ends: 28629 [2021-12-21 11:17:41,392 INFO L226 Difference]: Without dead ends: 14809 [2021-12-21 11:17:41,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:41,405 INFO L933 BasicCegarLoop]: 433 mSDtfsCounter, 224 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:41,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 439 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 11:17:41,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14809 states. [2021-12-21 11:17:41,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14809 to 14809. [2021-12-21 11:17:41,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14809 states, 14808 states have (on average 1.032752566180443) internal successors, (15293), 14808 states have internal predecessors, (15293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:41,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14809 states to 14809 states and 15293 transitions. [2021-12-21 11:17:41,580 INFO L78 Accepts]: Start accepts. Automaton has 14809 states and 15293 transitions. Word has length 1525 [2021-12-21 11:17:41,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:41,582 INFO L470 AbstractCegarLoop]: Abstraction has 14809 states and 15293 transitions. [2021-12-21 11:17:41,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:41,582 INFO L276 IsEmpty]: Start isEmpty. Operand 14809 states and 15293 transitions. [2021-12-21 11:17:41,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1580 [2021-12-21 11:17:41,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:41,617 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:41,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 11:17:41,617 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:41,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:41,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1969169951, now seen corresponding path program 1 times [2021-12-21 11:17:41,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:41,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139799633] [2021-12-21 11:17:41,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:41,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:42,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4866 backedges. 2857 proven. 0 refuted. 0 times theorem prover too weak. 2009 trivial. 0 not checked. [2021-12-21 11:17:42,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:42,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139799633] [2021-12-21 11:17:42,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139799633] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:42,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:42,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:17:42,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167554815] [2021-12-21 11:17:42,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:42,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:42,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:42,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:42,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:42,146 INFO L87 Difference]: Start difference. First operand 14809 states and 15293 transitions. Second operand has 3 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:42,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:42,891 INFO L93 Difference]: Finished difference Result 32248 states and 33298 transitions. [2021-12-21 11:17:42,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:42,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 0 states have call successors, (0), 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 1579 [2021-12-21 11:17:42,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:42,907 INFO L225 Difference]: With dead ends: 32248 [2021-12-21 11:17:42,907 INFO L226 Difference]: Without dead ends: 15796 [2021-12-21 11:17:42,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:42,918 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 207 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:42,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 410 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 11:17:42,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15796 states. [2021-12-21 11:17:43,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15796 to 15467. [2021-12-21 11:17:43,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15467 states, 15466 states have (on average 1.0277382645803699) internal successors, (15895), 15466 states have internal predecessors, (15895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:43,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15467 states to 15467 states and 15895 transitions. [2021-12-21 11:17:43,072 INFO L78 Accepts]: Start accepts. Automaton has 15467 states and 15895 transitions. Word has length 1579 [2021-12-21 11:17:43,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:43,073 INFO L470 AbstractCegarLoop]: Abstraction has 15467 states and 15895 transitions. [2021-12-21 11:17:43,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:43,074 INFO L276 IsEmpty]: Start isEmpty. Operand 15467 states and 15895 transitions. [2021-12-21 11:17:43,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1655 [2021-12-21 11:17:43,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:43,099 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:43,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 11:17:43,099 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:43,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:43,099 INFO L85 PathProgramCache]: Analyzing trace with hash 447971240, now seen corresponding path program 1 times [2021-12-21 11:17:43,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:43,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875562379] [2021-12-21 11:17:43,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:43,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:43,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5196 backedges. 1241 proven. 0 refuted. 0 times theorem prover too weak. 3955 trivial. 0 not checked. [2021-12-21 11:17:43,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:43,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875562379] [2021-12-21 11:17:43,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875562379] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:43,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:43,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:17:43,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110812430] [2021-12-21 11:17:43,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:43,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:43,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:43,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:43,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:43,705 INFO L87 Difference]: Start difference. First operand 15467 states and 15895 transitions. Second operand has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:44,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:44,473 INFO L93 Difference]: Finished difference Result 30603 states and 31457 transitions. [2021-12-21 11:17:44,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:44,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 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 1654 [2021-12-21 11:17:44,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:44,490 INFO L225 Difference]: With dead ends: 30603 [2021-12-21 11:17:44,490 INFO L226 Difference]: Without dead ends: 15467 [2021-12-21 11:17:44,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:44,501 INFO L933 BasicCegarLoop]: 418 mSDtfsCounter, 175 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:44,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 424 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 11:17:44,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15467 states. [2021-12-21 11:17:44,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15467 to 13493. [2021-12-21 11:17:44,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13493 states, 13492 states have (on average 1.017195375037059) internal successors, (13724), 13492 states have internal predecessors, (13724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:44,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13493 states to 13493 states and 13724 transitions. [2021-12-21 11:17:44,641 INFO L78 Accepts]: Start accepts. Automaton has 13493 states and 13724 transitions. Word has length 1654 [2021-12-21 11:17:44,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:44,642 INFO L470 AbstractCegarLoop]: Abstraction has 13493 states and 13724 transitions. [2021-12-21 11:17:44,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:44,643 INFO L276 IsEmpty]: Start isEmpty. Operand 13493 states and 13724 transitions. [2021-12-21 11:17:44,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1816 [2021-12-21 11:17:44,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:44,672 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:44,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 11:17:44,672 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:44,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:44,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1660997822, now seen corresponding path program 1 times [2021-12-21 11:17:44,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:44,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365848366] [2021-12-21 11:17:44,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:44,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:44,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:45,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6459 backedges. 3287 proven. 66 refuted. 0 times theorem prover too weak. 3106 trivial. 0 not checked. [2021-12-21 11:17:45,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:45,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365848366] [2021-12-21 11:17:45,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365848366] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:17:45,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328664857] [2021-12-21 11:17:45,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:45,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:17:45,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:17:45,324 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:17:45,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 11:17:45,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:45,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 2116 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 11:17:45,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:17:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6459 backedges. 2629 proven. 201 refuted. 0 times theorem prover too weak. 3629 trivial. 0 not checked. [2021-12-21 11:17:50,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 11:17:58,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6459 backedges. 2629 proven. 201 refuted. 0 times theorem prover too weak. 3629 trivial. 0 not checked. [2021-12-21 11:17:58,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328664857] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 11:17:58,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 11:17:58,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2021-12-21 11:17:58,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237964672] [2021-12-21 11:17:58,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 11:17:58,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 11:17:58,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:58,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 11:17:58,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-21 11:17:58,163 INFO L87 Difference]: Start difference. First operand 13493 states and 13724 transitions. Second operand has 9 states, 9 states have (on average 190.0) internal successors, (1710), 8 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:18:02,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:18:02,387 INFO L93 Difference]: Finished difference Result 37183 states and 37831 transitions. [2021-12-21 11:18:02,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 11:18:02,387 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 190.0) internal successors, (1710), 8 states have internal predecessors, (1710), 0 states have call successors, (0), 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 1815 [2021-12-21 11:18:02,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:18:02,406 INFO L225 Difference]: With dead ends: 37183 [2021-12-21 11:18:02,406 INFO L226 Difference]: Without dead ends: 24021 [2021-12-21 11:18:02,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3640 GetRequests, 3625 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-12-21 11:18:02,418 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 2057 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 6185 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2057 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 6403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 6185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-21 11:18:02,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2057 Valid, 82 Invalid, 6403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 6185 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-12-21 11:18:02,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24021 states. [2021-12-21 11:18:02,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24021 to 17770. [2021-12-21 11:18:02,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17770 states, 17769 states have (on average 1.0173898362316394) internal successors, (18078), 17769 states have internal predecessors, (18078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:18:02,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17770 states to 17770 states and 18078 transitions. [2021-12-21 11:18:02,570 INFO L78 Accepts]: Start accepts. Automaton has 17770 states and 18078 transitions. Word has length 1815 [2021-12-21 11:18:02,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:18:02,571 INFO L470 AbstractCegarLoop]: Abstraction has 17770 states and 18078 transitions. [2021-12-21 11:18:02,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 190.0) internal successors, (1710), 8 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:18:02,571 INFO L276 IsEmpty]: Start isEmpty. Operand 17770 states and 18078 transitions. [2021-12-21 11:18:02,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1846 [2021-12-21 11:18:02,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:18:02,601 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:18:02,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 11:18:02,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-21 11:18:02,803 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:18:02,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:18:02,803 INFO L85 PathProgramCache]: Analyzing trace with hash -659768353, now seen corresponding path program 1 times [2021-12-21 11:18:02,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:18:02,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615995035] [2021-12-21 11:18:02,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:18:02,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:18:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:18:03,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7305 backedges. 2633 proven. 156 refuted. 0 times theorem prover too weak. 4516 trivial. 0 not checked. [2021-12-21 11:18:03,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:18:03,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615995035] [2021-12-21 11:18:03,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615995035] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:18:03,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741755537] [2021-12-21 11:18:03,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:18:03,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:18:03,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:18:03,442 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:18:03,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 11:18:03,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:18:03,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 2170 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 11:18:03,816 INFO L286 TraceCheckSpWp]: Computing forward predicates...