./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem15_label10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/Problem15_label10.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 7f151a13e47989a65c4ec5b5333c24fda53f0a15e0e3e933f79a23263bfef839 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 09:27:24,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 09:27:24,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 09:27:24,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 09:27:24,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 09:27:24,833 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 09:27:24,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 09:27:24,838 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 09:27:24,840 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 09:27:24,843 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 09:27:24,844 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 09:27:24,845 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 09:27:24,845 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 09:27:24,847 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 09:27:24,848 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 09:27:24,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 09:27:24,851 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 09:27:24,851 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 09:27:24,853 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 09:27:24,857 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 09:27:24,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 09:27:24,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 09:27:24,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 09:27:24,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 09:27:24,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 09:27:24,866 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 09:27:24,866 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 09:27:24,867 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 09:27:24,867 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 09:27:24,868 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 09:27:24,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 09:27:24,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 09:27:24,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 09:27:24,870 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 09:27:24,871 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 09:27:24,871 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 09:27:24,872 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 09:27:24,872 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 09:27:24,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 09:27:24,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 09:27:24,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 09:27:24,874 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 09:27:24,902 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 09:27:24,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 09:27:24,903 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 09:27:24,904 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 09:27:24,904 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 09:27:24,904 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 09:27:24,905 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 09:27:24,905 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 09:27:24,905 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 09:27:24,905 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 09:27:24,906 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 09:27:24,906 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 09:27:24,906 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 09:27:24,906 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 09:27:24,907 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 09:27:24,907 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 09:27:24,907 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 09:27:24,907 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 09:27:24,907 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 09:27:24,907 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 09:27:24,908 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 09:27:24,908 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 09:27:24,908 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 09:27:24,908 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 09:27:24,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:27:24,908 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 09:27:24,909 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 09:27:24,909 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 09:27:24,910 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 09:27:24,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 09:27:24,910 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 09:27:24,910 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 09:27:24,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 09:27:24,910 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 09:27:24,911 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f151a13e47989a65c4ec5b5333c24fda53f0a15e0e3e933f79a23263bfef839 [2021-12-22 09:27:25,131 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 09:27:25,149 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 09:27:25,151 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 09:27:25,152 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 09:27:25,153 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 09:27:25,154 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label10.c [2021-12-22 09:27:25,210 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddbab1de9/8672a51e40774a2a8345f44c168040c3/FLAGfbea8bc3c [2021-12-22 09:27:25,726 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 09:27:25,727 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label10.c [2021-12-22 09:27:25,745 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddbab1de9/8672a51e40774a2a8345f44c168040c3/FLAGfbea8bc3c [2021-12-22 09:27:26,194 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddbab1de9/8672a51e40774a2a8345f44c168040c3 [2021-12-22 09:27:26,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 09:27:26,197 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 09:27:26,201 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 09:27:26,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 09:27:26,205 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 09:27:26,206 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:27:26" (1/1) ... [2021-12-22 09:27:26,207 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ecc4e65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:26, skipping insertion in model container [2021-12-22 09:27:26,207 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:27:26" (1/1) ... [2021-12-22 09:27:26,211 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 09:27:26,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 09:27:26,495 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/Problem15_label10.c[4275,4288] [2021-12-22 09:27:26,796 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:27:26,802 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 09:27:26,826 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/Problem15_label10.c[4275,4288] [2021-12-22 09:27:26,952 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:27:26,963 INFO L208 MainTranslator]: Completed translation [2021-12-22 09:27:26,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:26 WrapperNode [2021-12-22 09:27:26,964 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 09:27:26,964 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 09:27:26,964 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 09:27:26,965 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 09:27:26,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:26" (1/1) ... [2021-12-22 09:27:27,004 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:26" (1/1) ... [2021-12-22 09:27:27,124 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1758 [2021-12-22 09:27:27,125 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 09:27:27,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 09:27:27,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 09:27:27,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 09:27:27,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:26" (1/1) ... [2021-12-22 09:27:27,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:26" (1/1) ... [2021-12-22 09:27:27,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:26" (1/1) ... [2021-12-22 09:27:27,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:26" (1/1) ... [2021-12-22 09:27:27,243 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:26" (1/1) ... [2021-12-22 09:27:27,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:26" (1/1) ... [2021-12-22 09:27:27,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:26" (1/1) ... [2021-12-22 09:27:27,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 09:27:27,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 09:27:27,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 09:27:27,292 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 09:27:27,292 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:26" (1/1) ... [2021-12-22 09:27:27,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:27:27,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:27:27,328 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) [2021-12-22 09:27:27,390 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 [2021-12-22 09:27:27,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 09:27:27,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 09:27:27,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 09:27:27,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 09:27:27,449 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 09:27:27,450 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 09:27:29,211 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 09:27:29,221 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 09:27:29,222 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 09:27:29,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:27:29 BoogieIcfgContainer [2021-12-22 09:27:29,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 09:27:29,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 09:27:29,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 09:27:29,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 09:27:29,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:27:26" (1/3) ... [2021-12-22 09:27:29,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@361f3921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:27:29, skipping insertion in model container [2021-12-22 09:27:29,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:26" (2/3) ... [2021-12-22 09:27:29,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@361f3921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:27:29, skipping insertion in model container [2021-12-22 09:27:29,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:27:29" (3/3) ... [2021-12-22 09:27:29,231 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label10.c [2021-12-22 09:27:29,234 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 09:27:29,235 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 09:27:29,276 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 09:27:29,283 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 [2021-12-22 09:27:29,283 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 09:27:29,306 INFO L276 IsEmpty]: Start isEmpty. Operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:29,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-22 09:27:29,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:29,314 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:29,314 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:29,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:29,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1089129850, now seen corresponding path program 1 times [2021-12-22 09:27:29,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:29,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954972588] [2021-12-22 09:27:29,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:29,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:29,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:27:29,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:29,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954972588] [2021-12-22 09:27:29,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954972588] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:29,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:29,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:27:29,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040262350] [2021-12-22 09:27:29,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:29,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:29,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:29,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:29,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:29,562 INFO L87 Difference]: Start difference. First operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 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 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:31,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:31,319 INFO L93 Difference]: Finished difference Result 1154 states and 2106 transitions. [2021-12-22 09:27:31,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:31,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-12-22 09:27:31,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:31,333 INFO L225 Difference]: With dead ends: 1154 [2021-12-22 09:27:31,337 INFO L226 Difference]: Without dead ends: 665 [2021-12-22 09:27:31,344 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 [2021-12-22 09:27:31,356 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 287 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:31,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 383 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-22 09:27:31,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-12-22 09:27:31,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 663. [2021-12-22 09:27:31,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 1.4818731117824773) internal successors, (981), 662 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:31,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 981 transitions. [2021-12-22 09:27:31,462 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 981 transitions. Word has length 34 [2021-12-22 09:27:31,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:31,466 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 981 transitions. [2021-12-22 09:27:31,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:31,467 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 981 transitions. [2021-12-22 09:27:31,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-22 09:27:31,471 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:31,471 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:31,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 09:27:31,472 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:31,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:31,473 INFO L85 PathProgramCache]: Analyzing trace with hash 513841653, now seen corresponding path program 1 times [2021-12-22 09:27:31,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:31,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496002676] [2021-12-22 09:27:31,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:31,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:31,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:27:31,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:31,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496002676] [2021-12-22 09:27:31,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496002676] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:31,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:31,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:27:31,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217731704] [2021-12-22 09:27:31,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:31,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:31,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:31,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:31,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:31,652 INFO L87 Difference]: Start difference. First operand 663 states and 981 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:32,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:32,797 INFO L93 Difference]: Finished difference Result 1624 states and 2315 transitions. [2021-12-22 09:27:32,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:32,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-12-22 09:27:32,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:32,801 INFO L225 Difference]: With dead ends: 1624 [2021-12-22 09:27:32,801 INFO L226 Difference]: Without dead ends: 963 [2021-12-22 09:27:32,802 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 [2021-12-22 09:27:32,803 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 237 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:32,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 337 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 09:27:32,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-12-22 09:27:32,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2021-12-22 09:27:32,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 1.362785862785863) internal successors, (1311), 962 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:32,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1311 transitions. [2021-12-22 09:27:32,819 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1311 transitions. Word has length 99 [2021-12-22 09:27:32,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:32,819 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 1311 transitions. [2021-12-22 09:27:32,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:32,820 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1311 transitions. [2021-12-22 09:27:32,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-22 09:27:32,821 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:32,821 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:32,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 09:27:32,821 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:32,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:32,822 INFO L85 PathProgramCache]: Analyzing trace with hash 226015812, now seen corresponding path program 1 times [2021-12-22 09:27:32,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:32,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677057050] [2021-12-22 09:27:32,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:32,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:32,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:27:32,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:32,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677057050] [2021-12-22 09:27:32,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677057050] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:32,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:32,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 09:27:32,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885882696] [2021-12-22 09:27:32,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:32,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 09:27:32,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:32,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 09:27:32,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:27:32,901 INFO L87 Difference]: Start difference. First operand 963 states and 1311 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:34,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:34,636 INFO L93 Difference]: Finished difference Result 2244 states and 3201 transitions. [2021-12-22 09:27:34,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:27:34,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 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 104 [2021-12-22 09:27:34,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:34,650 INFO L225 Difference]: With dead ends: 2244 [2021-12-22 09:27:34,650 INFO L226 Difference]: Without dead ends: 1582 [2021-12-22 09:27:34,652 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 [2021-12-22 09:27:34,656 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 361 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 1664 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 2146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 1664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:34,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 366 Invalid, 2146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 1664 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-22 09:27:34,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-12-22 09:27:34,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1266. [2021-12-22 09:27:34,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 1.3043478260869565) internal successors, (1650), 1265 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:34,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1650 transitions. [2021-12-22 09:27:34,682 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1650 transitions. Word has length 104 [2021-12-22 09:27:34,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:34,682 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 1650 transitions. [2021-12-22 09:27:34,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:34,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1650 transitions. [2021-12-22 09:27:34,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-12-22 09:27:34,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:34,690 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:27:34,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 09:27:34,691 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:34,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:34,692 INFO L85 PathProgramCache]: Analyzing trace with hash 527806185, now seen corresponding path program 1 times [2021-12-22 09:27:34,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:34,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44146160] [2021-12-22 09:27:34,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:34,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:34,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:34,821 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:27:34,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:34,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44146160] [2021-12-22 09:27:34,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44146160] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:34,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:34,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:27:34,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471002981] [2021-12-22 09:27:34,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:34,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:27:34,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:34,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:27:34,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:27:34,824 INFO L87 Difference]: Start difference. First operand 1266 states and 1650 transitions. Second operand has 4 states, 4 states have (on average 50.0) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:37,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:37,555 INFO L93 Difference]: Finished difference Result 4668 states and 6169 transitions. [2021-12-22 09:27:37,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:27:37,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.0) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-12-22 09:27:37,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:37,565 INFO L225 Difference]: With dead ends: 4668 [2021-12-22 09:27:37,565 INFO L226 Difference]: Without dead ends: 3404 [2021-12-22 09:27:37,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:27:37,568 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 488 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1953 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 2237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 1953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:37,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 346 Invalid, 2237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 1953 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-22 09:27:37,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3404 states. [2021-12-22 09:27:37,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3404 to 3381. [2021-12-22 09:27:37,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3381 states, 3380 states have (on average 1.2363905325443787) internal successors, (4179), 3380 states have internal predecessors, (4179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:37,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3381 states to 3381 states and 4179 transitions. [2021-12-22 09:27:37,612 INFO L78 Accepts]: Start accepts. Automaton has 3381 states and 4179 transitions. Word has length 200 [2021-12-22 09:27:37,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:37,613 INFO L470 AbstractCegarLoop]: Abstraction has 3381 states and 4179 transitions. [2021-12-22 09:27:37,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.0) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:37,613 INFO L276 IsEmpty]: Start isEmpty. Operand 3381 states and 4179 transitions. [2021-12-22 09:27:37,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-12-22 09:27:37,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:37,636 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:27:37,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 09:27:37,637 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:37,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:37,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1817183713, now seen corresponding path program 1 times [2021-12-22 09:27:37,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:37,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450585751] [2021-12-22 09:27:37,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:37,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:37,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:37,779 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-22 09:27:37,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:37,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450585751] [2021-12-22 09:27:37,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450585751] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:37,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:37,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:27:37,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379834388] [2021-12-22 09:27:37,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:37,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:37,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:37,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:37,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:37,784 INFO L87 Difference]: Start difference. First operand 3381 states and 4179 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:38,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:38,926 INFO L93 Difference]: Finished difference Result 8563 states and 10751 transitions. [2021-12-22 09:27:38,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:38,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 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 204 [2021-12-22 09:27:38,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:38,942 INFO L225 Difference]: With dead ends: 8563 [2021-12-22 09:27:38,942 INFO L226 Difference]: Without dead ends: 5483 [2021-12-22 09:27:38,946 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 [2021-12-22 09:27:38,947 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 257 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:38,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 339 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 09:27:38,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5483 states. [2021-12-22 09:27:39,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5483 to 5478. [2021-12-22 09:27:39,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5478 states, 5477 states have (on average 1.1683403322987036) internal successors, (6399), 5477 states have internal predecessors, (6399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:39,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 6399 transitions. [2021-12-22 09:27:39,019 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 6399 transitions. Word has length 204 [2021-12-22 09:27:39,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:39,021 INFO L470 AbstractCegarLoop]: Abstraction has 5478 states and 6399 transitions. [2021-12-22 09:27:39,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:39,023 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 6399 transitions. [2021-12-22 09:27:39,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-12-22 09:27:39,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:39,027 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:27:39,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 09:27:39,028 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:39,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:39,029 INFO L85 PathProgramCache]: Analyzing trace with hash 224343269, now seen corresponding path program 1 times [2021-12-22 09:27:39,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:39,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561417388] [2021-12-22 09:27:39,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:39,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-22 09:27:39,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:39,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561417388] [2021-12-22 09:27:39,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561417388] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:39,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:39,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:27:39,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632677569] [2021-12-22 09:27:39,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:39,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:39,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:39,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:39,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:39,200 INFO L87 Difference]: Start difference. First operand 5478 states and 6399 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:40,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:40,316 INFO L93 Difference]: Finished difference Result 10655 states and 12485 transitions. [2021-12-22 09:27:40,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:40,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 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 306 [2021-12-22 09:27:40,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:40,329 INFO L225 Difference]: With dead ends: 10655 [2021-12-22 09:27:40,330 INFO L226 Difference]: Without dead ends: 5478 [2021-12-22 09:27:40,335 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 [2021-12-22 09:27:40,336 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 105 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:40,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 359 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 09:27:40,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5478 states. [2021-12-22 09:27:40,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5478 to 5478. [2021-12-22 09:27:40,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5478 states, 5477 states have (on average 1.1672448420668249) internal successors, (6393), 5477 states have internal predecessors, (6393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:40,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 6393 transitions. [2021-12-22 09:27:40,396 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 6393 transitions. Word has length 306 [2021-12-22 09:27:40,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:40,397 INFO L470 AbstractCegarLoop]: Abstraction has 5478 states and 6393 transitions. [2021-12-22 09:27:40,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:40,397 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 6393 transitions. [2021-12-22 09:27:40,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-12-22 09:27:40,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:40,401 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:27:40,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 09:27:40,401 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:40,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:40,402 INFO L85 PathProgramCache]: Analyzing trace with hash 559264950, now seen corresponding path program 1 times [2021-12-22 09:27:40,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:40,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991453248] [2021-12-22 09:27:40,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:40,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:40,501 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-22 09:27:40,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:40,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991453248] [2021-12-22 09:27:40,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991453248] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:40,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:40,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:27:40,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627855568] [2021-12-22 09:27:40,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:40,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:40,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:40,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:40,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:40,503 INFO L87 Difference]: Start difference. First operand 5478 states and 6393 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:41,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:41,850 INFO L93 Difference]: Finished difference Result 11851 states and 14145 transitions. [2021-12-22 09:27:41,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:41,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 321 [2021-12-22 09:27:41,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:41,866 INFO L225 Difference]: With dead ends: 11851 [2021-12-22 09:27:41,866 INFO L226 Difference]: Without dead ends: 6674 [2021-12-22 09:27:41,871 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 [2021-12-22 09:27:41,872 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 281 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:41,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 322 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-22 09:27:41,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6674 states. [2021-12-22 09:27:41,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6674 to 4577. [2021-12-22 09:27:41,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4577 states, 4576 states have (on average 1.1840034965034965) internal successors, (5418), 4576 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:41,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4577 states to 4577 states and 5418 transitions. [2021-12-22 09:27:41,927 INFO L78 Accepts]: Start accepts. Automaton has 4577 states and 5418 transitions. Word has length 321 [2021-12-22 09:27:41,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:41,928 INFO L470 AbstractCegarLoop]: Abstraction has 4577 states and 5418 transitions. [2021-12-22 09:27:41,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:41,928 INFO L276 IsEmpty]: Start isEmpty. Operand 4577 states and 5418 transitions. [2021-12-22 09:27:41,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2021-12-22 09:27:41,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:41,932 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:41,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 09:27:41,932 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:41,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:41,933 INFO L85 PathProgramCache]: Analyzing trace with hash 11227575, now seen corresponding path program 1 times [2021-12-22 09:27:41,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:41,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906861883] [2021-12-22 09:27:41,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:41,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:42,050 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-22 09:27:42,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:42,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906861883] [2021-12-22 09:27:42,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906861883] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:42,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:42,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:27:42,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117140037] [2021-12-22 09:27:42,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:42,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:42,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:42,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:42,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:42,053 INFO L87 Difference]: Start difference. First operand 4577 states and 5418 transitions. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:43,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:43,242 INFO L93 Difference]: Finished difference Result 10955 states and 13233 transitions. [2021-12-22 09:27:43,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:43,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 380 [2021-12-22 09:27:43,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:43,272 INFO L225 Difference]: With dead ends: 10955 [2021-12-22 09:27:43,273 INFO L226 Difference]: Without dead ends: 6679 [2021-12-22 09:27:43,292 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 [2021-12-22 09:27:43,293 INFO L933 BasicCegarLoop]: 600 mSDtfsCounter, 294 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:43,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 637 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 09:27:43,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6679 states. [2021-12-22 09:27:43,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6679 to 6081. [2021-12-22 09:27:43,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6081 states, 6080 states have (on average 1.1572368421052632) internal successors, (7036), 6080 states have internal predecessors, (7036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:43,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6081 states to 6081 states and 7036 transitions. [2021-12-22 09:27:43,362 INFO L78 Accepts]: Start accepts. Automaton has 6081 states and 7036 transitions. Word has length 380 [2021-12-22 09:27:43,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:43,362 INFO L470 AbstractCegarLoop]: Abstraction has 6081 states and 7036 transitions. [2021-12-22 09:27:43,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:43,363 INFO L276 IsEmpty]: Start isEmpty. Operand 6081 states and 7036 transitions. [2021-12-22 09:27:43,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-12-22 09:27:43,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:43,367 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:43,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 09:27:43,368 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:43,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:43,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1017767819, now seen corresponding path program 1 times [2021-12-22 09:27:43,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:43,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406232228] [2021-12-22 09:27:43,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:43,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:43,542 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:27:43,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:43,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406232228] [2021-12-22 09:27:43,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406232228] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:43,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:43,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:27:43,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781466449] [2021-12-22 09:27:43,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:43,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:43,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:43,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:43,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:43,545 INFO L87 Difference]: Start difference. First operand 6081 states and 7036 transitions. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:44,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:44,509 INFO L93 Difference]: Finished difference Result 11857 states and 13761 transitions. [2021-12-22 09:27:44,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:44,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 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 386 [2021-12-22 09:27:44,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:44,517 INFO L225 Difference]: With dead ends: 11857 [2021-12-22 09:27:44,517 INFO L226 Difference]: Without dead ends: 6077 [2021-12-22 09:27:44,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:44,522 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 314 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:44,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 144 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 09:27:44,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6077 states. [2021-12-22 09:27:44,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6077 to 6075. [2021-12-22 09:27:44,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6075 states, 6074 states have (on average 1.141751728679618) internal successors, (6935), 6074 states have internal predecessors, (6935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:44,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6075 states to 6075 states and 6935 transitions. [2021-12-22 09:27:44,574 INFO L78 Accepts]: Start accepts. Automaton has 6075 states and 6935 transitions. Word has length 386 [2021-12-22 09:27:44,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:44,575 INFO L470 AbstractCegarLoop]: Abstraction has 6075 states and 6935 transitions. [2021-12-22 09:27:44,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:44,575 INFO L276 IsEmpty]: Start isEmpty. Operand 6075 states and 6935 transitions. [2021-12-22 09:27:44,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2021-12-22 09:27:44,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:44,579 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:44,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 09:27:44,579 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:44,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:44,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1956207138, now seen corresponding path program 1 times [2021-12-22 09:27:44,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:44,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974389614] [2021-12-22 09:27:44,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:44,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:44,680 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:27:44,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:44,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974389614] [2021-12-22 09:27:44,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974389614] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:44,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:44,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:27:44,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502050517] [2021-12-22 09:27:44,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:44,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:44,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:44,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:44,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:44,683 INFO L87 Difference]: Start difference. First operand 6075 states and 6935 transitions. Second operand has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:45,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:45,916 INFO L93 Difference]: Finished difference Result 13954 states and 16191 transitions. [2021-12-22 09:27:45,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:45,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 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 397 [2021-12-22 09:27:45,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:45,946 INFO L225 Difference]: With dead ends: 13954 [2021-12-22 09:27:45,946 INFO L226 Difference]: Without dead ends: 8180 [2021-12-22 09:27:45,951 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 [2021-12-22 09:27:45,952 INFO L933 BasicCegarLoop]: 561 mSDtfsCounter, 247 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:45,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 599 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 09:27:45,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8180 states. [2021-12-22 09:27:46,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8180 to 7579. [2021-12-22 09:27:46,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7579 states, 7578 states have (on average 1.1307732911058326) internal successors, (8569), 7578 states have internal predecessors, (8569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:46,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7579 states to 7579 states and 8569 transitions. [2021-12-22 09:27:46,032 INFO L78 Accepts]: Start accepts. Automaton has 7579 states and 8569 transitions. Word has length 397 [2021-12-22 09:27:46,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:46,033 INFO L470 AbstractCegarLoop]: Abstraction has 7579 states and 8569 transitions. [2021-12-22 09:27:46,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:46,033 INFO L276 IsEmpty]: Start isEmpty. Operand 7579 states and 8569 transitions. [2021-12-22 09:27:46,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2021-12-22 09:27:46,036 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:46,036 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:46,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 09:27:46,037 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:46,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:46,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1857017877, now seen corresponding path program 1 times [2021-12-22 09:27:46,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:46,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041524329] [2021-12-22 09:27:46,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:46,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:46,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:46,162 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-22 09:27:46,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:46,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041524329] [2021-12-22 09:27:46,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041524329] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:46,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:46,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:27:46,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169934400] [2021-12-22 09:27:46,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:46,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:46,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:46,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:46,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:46,165 INFO L87 Difference]: Start difference. First operand 7579 states and 8569 transitions. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:47,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:47,872 INFO L93 Difference]: Finished difference Result 17315 states and 19927 transitions. [2021-12-22 09:27:47,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:47,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 411 [2021-12-22 09:27:47,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:47,887 INFO L225 Difference]: With dead ends: 17315 [2021-12-22 09:27:47,888 INFO L226 Difference]: Without dead ends: 10037 [2021-12-22 09:27:47,893 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 [2021-12-22 09:27:47,894 INFO L933 BasicCegarLoop]: 476 mSDtfsCounter, 382 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:47,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 540 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-22 09:27:47,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10037 states. [2021-12-22 09:27:47,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10037 to 10032. [2021-12-22 09:27:47,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10032 states, 10031 states have (on average 1.1470441630944073) internal successors, (11506), 10031 states have internal predecessors, (11506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:47,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10032 states to 10032 states and 11506 transitions. [2021-12-22 09:27:47,993 INFO L78 Accepts]: Start accepts. Automaton has 10032 states and 11506 transitions. Word has length 411 [2021-12-22 09:27:47,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:47,993 INFO L470 AbstractCegarLoop]: Abstraction has 10032 states and 11506 transitions. [2021-12-22 09:27:47,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:47,993 INFO L276 IsEmpty]: Start isEmpty. Operand 10032 states and 11506 transitions. [2021-12-22 09:27:47,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2021-12-22 09:27:47,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:47,997 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:47,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 09:27:47,998 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:47,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:47,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1307685406, now seen corresponding path program 1 times [2021-12-22 09:27:47,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:47,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516244855] [2021-12-22 09:27:47,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:47,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-22 09:27:48,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:48,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516244855] [2021-12-22 09:27:48,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516244855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:48,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:48,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:27:48,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162340153] [2021-12-22 09:27:48,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:48,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:48,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:48,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:48,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:48,108 INFO L87 Difference]: Start difference. First operand 10032 states and 11506 transitions. Second operand has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:49,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:49,262 INFO L93 Difference]: Finished difference Result 22158 states and 25850 transitions. [2021-12-22 09:27:49,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:49,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 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 413 [2021-12-22 09:27:49,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:49,280 INFO L225 Difference]: With dead ends: 22158 [2021-12-22 09:27:49,280 INFO L226 Difference]: Without dead ends: 12427 [2021-12-22 09:27:49,287 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 [2021-12-22 09:27:49,288 INFO L933 BasicCegarLoop]: 578 mSDtfsCounter, 236 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:49,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 616 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 09:27:49,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12427 states. [2021-12-22 09:27:49,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12427 to 12423. [2021-12-22 09:27:49,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12423 states, 12422 states have (on average 1.13524392207374) internal successors, (14102), 12422 states have internal predecessors, (14102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:49,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12423 states to 12423 states and 14102 transitions. [2021-12-22 09:27:49,401 INFO L78 Accepts]: Start accepts. Automaton has 12423 states and 14102 transitions. Word has length 413 [2021-12-22 09:27:49,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:49,401 INFO L470 AbstractCegarLoop]: Abstraction has 12423 states and 14102 transitions. [2021-12-22 09:27:49,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:49,402 INFO L276 IsEmpty]: Start isEmpty. Operand 12423 states and 14102 transitions. [2021-12-22 09:27:49,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2021-12-22 09:27:49,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:49,406 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:49,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 09:27:49,407 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:49,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:49,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1762941478, now seen corresponding path program 1 times [2021-12-22 09:27:49,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:49,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66061262] [2021-12-22 09:27:49,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:49,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:49,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:49,539 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-22 09:27:49,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:49,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66061262] [2021-12-22 09:27:49,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66061262] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:49,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:49,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:27:49,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494791739] [2021-12-22 09:27:49,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:49,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:49,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:49,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:49,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:49,541 INFO L87 Difference]: Start difference. First operand 12423 states and 14102 transitions. Second operand has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:51,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:51,376 INFO L93 Difference]: Finished difference Result 32317 states and 36783 transitions. [2021-12-22 09:27:51,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:51,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 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 483 [2021-12-22 09:27:51,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:51,414 INFO L225 Difference]: With dead ends: 32317 [2021-12-22 09:27:51,415 INFO L226 Difference]: Without dead ends: 20195 [2021-12-22 09:27:51,425 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 [2021-12-22 09:27:51,426 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 301 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:51,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 193 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-22 09:27:51,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20195 states. [2021-12-22 09:27:51,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20195 to 17205. [2021-12-22 09:27:51,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17205 states, 17204 states have (on average 1.1337479655893978) internal successors, (19505), 17204 states have internal predecessors, (19505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:51,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17205 states to 17205 states and 19505 transitions. [2021-12-22 09:27:51,584 INFO L78 Accepts]: Start accepts. Automaton has 17205 states and 19505 transitions. Word has length 483 [2021-12-22 09:27:51,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:51,584 INFO L470 AbstractCegarLoop]: Abstraction has 17205 states and 19505 transitions. [2021-12-22 09:27:51,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:51,585 INFO L276 IsEmpty]: Start isEmpty. Operand 17205 states and 19505 transitions. [2021-12-22 09:27:51,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2021-12-22 09:27:51,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:51,589 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 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] [2021-12-22 09:27:51,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 09:27:51,590 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:51,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:51,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1063330375, now seen corresponding path program 1 times [2021-12-22 09:27:51,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:51,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694470234] [2021-12-22 09:27:51,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:51,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:51,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 363 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-12-22 09:27:51,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:51,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694470234] [2021-12-22 09:27:51,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694470234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:51,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:51,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:27:51,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089659345] [2021-12-22 09:27:51,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:51,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:51,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:51,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:51,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:51,800 INFO L87 Difference]: Start difference. First operand 17205 states and 19505 transitions. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:53,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:53,396 INFO L93 Difference]: Finished difference Result 41907 states and 47931 transitions. [2021-12-22 09:27:53,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:53,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 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 522 [2021-12-22 09:27:53,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:53,437 INFO L225 Difference]: With dead ends: 41907 [2021-12-22 09:27:53,437 INFO L226 Difference]: Without dead ends: 25003 [2021-12-22 09:27:53,451 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 [2021-12-22 09:27:53,452 INFO L933 BasicCegarLoop]: 563 mSDtfsCounter, 248 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:53,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 595 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-22 09:27:53,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25003 states. [2021-12-22 09:27:53,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25003 to 24684. [2021-12-22 09:27:53,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24684 states, 24683 states have (on average 1.1249848073572903) internal successors, (27768), 24683 states have internal predecessors, (27768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:53,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24684 states to 24684 states and 27768 transitions. [2021-12-22 09:27:53,748 INFO L78 Accepts]: Start accepts. Automaton has 24684 states and 27768 transitions. Word has length 522 [2021-12-22 09:27:53,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:53,749 INFO L470 AbstractCegarLoop]: Abstraction has 24684 states and 27768 transitions. [2021-12-22 09:27:53,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:53,749 INFO L276 IsEmpty]: Start isEmpty. Operand 24684 states and 27768 transitions. [2021-12-22 09:27:53,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2021-12-22 09:27:53,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:53,759 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:53,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 09:27:53,759 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:53,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:53,760 INFO L85 PathProgramCache]: Analyzing trace with hash -192587655, now seen corresponding path program 1 times [2021-12-22 09:27:53,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:53,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493498631] [2021-12-22 09:27:53,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:53,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:53,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:53,946 INFO L134 CoverageAnalysis]: Checked inductivity of 991 backedges. 628 proven. 39 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-12-22 09:27:53,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:53,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493498631] [2021-12-22 09:27:53,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493498631] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:27:53,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610398410] [2021-12-22 09:27:53,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:53,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:27:53,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:27:53,959 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) [2021-12-22 09:27:53,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 09:27:54,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:54,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:27:54,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:27:54,718 INFO L134 CoverageAnalysis]: Checked inductivity of 991 backedges. 467 proven. 0 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2021-12-22 09:27:54,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:27:54,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610398410] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:54,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:27:54,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-22 09:27:54,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007728937] [2021-12-22 09:27:54,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:54,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:54,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:54,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:54,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:27:54,720 INFO L87 Difference]: Start difference. First operand 24684 states and 27768 transitions. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:56,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:56,067 INFO L93 Difference]: Finished difference Result 55342 states and 62182 transitions. [2021-12-22 09:27:56,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:56,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 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 596 [2021-12-22 09:27:56,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:56,104 INFO L225 Difference]: With dead ends: 55342 [2021-12-22 09:27:56,104 INFO L226 Difference]: Without dead ends: 30959 [2021-12-22 09:27:56,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 595 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:27:56,124 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 265 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:56,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 250 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 09:27:56,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30959 states. [2021-12-22 09:27:56,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30959 to 27070. [2021-12-22 09:27:56,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27070 states, 27069 states have (on average 1.1213565333037792) internal successors, (30354), 27069 states have internal predecessors, (30354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:56,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27070 states to 27070 states and 30354 transitions. [2021-12-22 09:27:56,489 INFO L78 Accepts]: Start accepts. Automaton has 27070 states and 30354 transitions. Word has length 596 [2021-12-22 09:27:56,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:56,490 INFO L470 AbstractCegarLoop]: Abstraction has 27070 states and 30354 transitions. [2021-12-22 09:27:56,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:56,490 INFO L276 IsEmpty]: Start isEmpty. Operand 27070 states and 30354 transitions. [2021-12-22 09:27:56,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2021-12-22 09:27:56,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:56,499 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:56,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 09:27:56,723 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,SelfDestructingSolverStorable14 [2021-12-22 09:27:56,724 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:56,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:56,724 INFO L85 PathProgramCache]: Analyzing trace with hash -95465411, now seen corresponding path program 1 times [2021-12-22 09:27:56,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:56,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807011745] [2021-12-22 09:27:56,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:56,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:56,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:56,950 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2021-12-22 09:27:56,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:56,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807011745] [2021-12-22 09:27:56,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807011745] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:56,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:56,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:27:56,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903118151] [2021-12-22 09:27:56,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:56,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:56,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:56,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:56,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:56,952 INFO L87 Difference]: Start difference. First operand 27070 states and 30354 transitions. Second operand has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:58,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:58,847 INFO L93 Difference]: Finished difference Result 61045 states and 68675 transitions. [2021-12-22 09:27:58,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:58,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 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 596 [2021-12-22 09:27:58,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:58,887 INFO L225 Difference]: With dead ends: 61045 [2021-12-22 09:27:58,887 INFO L226 Difference]: Without dead ends: 34276 [2021-12-22 09:27:58,904 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 [2021-12-22 09:27:58,905 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 321 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:58,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 180 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-22 09:27:58,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34276 states. [2021-12-22 09:27:59,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34276 to 32152. [2021-12-22 09:27:59,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32152 states, 32151 states have (on average 1.1230443843115299) internal successors, (36107), 32151 states have internal predecessors, (36107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:59,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32152 states to 32152 states and 36107 transitions. [2021-12-22 09:27:59,212 INFO L78 Accepts]: Start accepts. Automaton has 32152 states and 36107 transitions. Word has length 596 [2021-12-22 09:27:59,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:59,213 INFO L470 AbstractCegarLoop]: Abstraction has 32152 states and 36107 transitions. [2021-12-22 09:27:59,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:59,213 INFO L276 IsEmpty]: Start isEmpty. Operand 32152 states and 36107 transitions. [2021-12-22 09:27:59,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2021-12-22 09:27:59,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:59,219 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:27:59,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 09:27:59,220 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:59,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:59,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1339152220, now seen corresponding path program 1 times [2021-12-22 09:27:59,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:59,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085205545] [2021-12-22 09:27:59,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:59,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:59,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:59,479 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 557 proven. 39 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-12-22 09:27:59,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:59,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085205545] [2021-12-22 09:27:59,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085205545] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:27:59,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448099782] [2021-12-22 09:27:59,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:59,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:27:59,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:27:59,481 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) [2021-12-22 09:27:59,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 09:27:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:59,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:27:59,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:28:00,446 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2021-12-22 09:28:00,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:28:00,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448099782] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:00,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:28:00,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-22 09:28:00,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194683198] [2021-12-22 09:28:00,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:00,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:28:00,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:00,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:28:00,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:28:00,448 INFO L87 Difference]: Start difference. First operand 32152 states and 36107 transitions. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:01,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:01,824 INFO L93 Difference]: Finished difference Result 63701 states and 71579 transitions. [2021-12-22 09:28:01,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:28:01,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 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 598 [2021-12-22 09:28:01,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:01,858 INFO L225 Difference]: With dead ends: 63701 [2021-12-22 09:28:01,859 INFO L226 Difference]: Without dead ends: 31850 [2021-12-22 09:28:01,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 597 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:28:01,875 INFO L933 BasicCegarLoop]: 565 mSDtfsCounter, 297 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:01,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 602 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 09:28:01,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31850 states. [2021-12-22 09:28:02,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31850 to 31252. [2021-12-22 09:28:02,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31252 states, 31251 states have (on average 1.084733288534767) internal successors, (33899), 31251 states have internal predecessors, (33899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:02,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31252 states to 31252 states and 33899 transitions. [2021-12-22 09:28:02,275 INFO L78 Accepts]: Start accepts. Automaton has 31252 states and 33899 transitions. Word has length 598 [2021-12-22 09:28:02,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:02,276 INFO L470 AbstractCegarLoop]: Abstraction has 31252 states and 33899 transitions. [2021-12-22 09:28:02,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:02,276 INFO L276 IsEmpty]: Start isEmpty. Operand 31252 states and 33899 transitions. [2021-12-22 09:28:02,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2021-12-22 09:28:02,289 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:02,289 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:28:02,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-22 09:28:02,506 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 [2021-12-22 09:28:02,506 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:02,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:02,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1544203669, now seen corresponding path program 1 times [2021-12-22 09:28:02,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:02,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476346475] [2021-12-22 09:28:02,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:02,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:02,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1078 backedges. 678 proven. 39 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-12-22 09:28:02,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:02,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476346475] [2021-12-22 09:28:02,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476346475] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:28:02,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790418984] [2021-12-22 09:28:02,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:02,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:28:02,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:28:02,840 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) [2021-12-22 09:28:02,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 09:28:03,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:03,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:28:03,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:28:03,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1078 backedges. 554 proven. 0 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2021-12-22 09:28:03,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:28:03,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790418984] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:03,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:28:03,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-22 09:28:03,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481830910] [2021-12-22 09:28:03,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:03,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:28:03,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:03,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:28:03,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:28:03,851 INFO L87 Difference]: Start difference. First operand 31252 states and 33899 transitions. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:05,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:05,143 INFO L93 Difference]: Finished difference Result 67581 states and 73181 transitions. [2021-12-22 09:28:05,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:28:05,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 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 686 [2021-12-22 09:28:05,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:05,178 INFO L225 Difference]: With dead ends: 67581 [2021-12-22 09:28:05,179 INFO L226 Difference]: Without dead ends: 30949 [2021-12-22 09:28:05,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 686 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:28:05,201 INFO L933 BasicCegarLoop]: 402 mSDtfsCounter, 300 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:05,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 414 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 09:28:05,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30949 states. [2021-12-22 09:28:05,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30949 to 27060. [2021-12-22 09:28:05,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27060 states, 27059 states have (on average 1.0410584278798183) internal successors, (28170), 27059 states have internal predecessors, (28170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:05,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27060 states to 27060 states and 28170 transitions. [2021-12-22 09:28:05,633 INFO L78 Accepts]: Start accepts. Automaton has 27060 states and 28170 transitions. Word has length 686 [2021-12-22 09:28:05,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:05,633 INFO L470 AbstractCegarLoop]: Abstraction has 27060 states and 28170 transitions. [2021-12-22 09:28:05,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:05,633 INFO L276 IsEmpty]: Start isEmpty. Operand 27060 states and 28170 transitions. [2021-12-22 09:28:05,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 704 [2021-12-22 09:28:05,644 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:05,644 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:28:05,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-22 09:28:05,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-22 09:28:05,860 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:05,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:05,860 INFO L85 PathProgramCache]: Analyzing trace with hash -253950539, now seen corresponding path program 1 times [2021-12-22 09:28:05,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:05,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747717599] [2021-12-22 09:28:05,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:05,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:06,195 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 202 proven. 375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:28:06,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:06,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747717599] [2021-12-22 09:28:06,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747717599] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:28:06,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094544975] [2021-12-22 09:28:06,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:06,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:28:06,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:28:06,205 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:28:06,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 09:28:06,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:06,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-22 09:28:06,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:28:08,633 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 470 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:28:08,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 09:28:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 470 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:28:10,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094544975] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 09:28:10,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 09:28:10,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2021-12-22 09:28:10,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853956785] [2021-12-22 09:28:10,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 09:28:10,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 09:28:10,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:10,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 09:28:10,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-22 09:28:10,747 INFO L87 Difference]: Start difference. First operand 27060 states and 28170 transitions. Second operand has 11 states, 11 states have (on average 135.0909090909091) internal successors, (1486), 11 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:18,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:18,049 INFO L93 Difference]: Finished difference Result 96692 states and 100559 transitions. [2021-12-22 09:28:18,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-22 09:28:18,049 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 135.0909090909091) internal successors, (1486), 11 states have internal predecessors, (1486), 0 states have call successors, (0), 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 703 [2021-12-22 09:28:18,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:18,126 INFO L225 Difference]: With dead ends: 96692 [2021-12-22 09:28:18,127 INFO L226 Difference]: Without dead ends: 69933 [2021-12-22 09:28:18,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1489 GetRequests, 1435 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=506, Invalid=2356, Unknown=0, NotChecked=0, Total=2862 [2021-12-22 09:28:18,154 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 9872 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 6613 mSolverCounterSat, 2124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9872 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 8737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2124 IncrementalHoareTripleChecker+Valid, 6613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:18,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9872 Valid, 301 Invalid, 8737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2124 Valid, 6613 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2021-12-22 09:28:18,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69933 states. [2021-12-22 09:28:18,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69933 to 27957. [2021-12-22 09:28:18,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27957 states, 27956 states have (on average 1.0382028902561167) internal successors, (29024), 27956 states have internal predecessors, (29024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:18,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27957 states to 27957 states and 29024 transitions. [2021-12-22 09:28:18,638 INFO L78 Accepts]: Start accepts. Automaton has 27957 states and 29024 transitions. Word has length 703 [2021-12-22 09:28:18,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:18,639 INFO L470 AbstractCegarLoop]: Abstraction has 27957 states and 29024 transitions. [2021-12-22 09:28:18,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 135.0909090909091) internal successors, (1486), 11 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:18,639 INFO L276 IsEmpty]: Start isEmpty. Operand 27957 states and 29024 transitions. [2021-12-22 09:28:18,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 781 [2021-12-22 09:28:18,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:18,655 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:28:18,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 09:28:18,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:28:18,873 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:18,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:18,874 INFO L85 PathProgramCache]: Analyzing trace with hash 653935701, now seen corresponding path program 1 times [2021-12-22 09:28:18,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:18,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730833734] [2021-12-22 09:28:18,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:18,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:19,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:19,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1228 backedges. 737 proven. 0 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2021-12-22 09:28:19,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:19,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730833734] [2021-12-22 09:28:19,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730833734] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:19,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:28:19,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:28:19,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593139040] [2021-12-22 09:28:19,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:19,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:28:19,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:19,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:28:19,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:28:19,201 INFO L87 Difference]: Start difference. First operand 27957 states and 29024 transitions. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:20,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:20,100 INFO L93 Difference]: Finished difference Result 55611 states and 57749 transitions. [2021-12-22 09:28:20,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:28:20,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 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 780 [2021-12-22 09:28:20,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:20,130 INFO L225 Difference]: With dead ends: 55611 [2021-12-22 09:28:20,130 INFO L226 Difference]: Without dead ends: 27955 [2021-12-22 09:28:20,146 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 [2021-12-22 09:28:20,147 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 462 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:20,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 68 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 09:28:20,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27955 states. [2021-12-22 09:28:20,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27955 to 27656. [2021-12-22 09:28:20,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27656 states, 27655 states have (on average 1.0381847767130719) internal successors, (28711), 27655 states have internal predecessors, (28711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:20,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27656 states to 27656 states and 28711 transitions. [2021-12-22 09:28:20,441 INFO L78 Accepts]: Start accepts. Automaton has 27656 states and 28711 transitions. Word has length 780 [2021-12-22 09:28:20,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:20,441 INFO L470 AbstractCegarLoop]: Abstraction has 27656 states and 28711 transitions. [2021-12-22 09:28:20,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:20,442 INFO L276 IsEmpty]: Start isEmpty. Operand 27656 states and 28711 transitions. [2021-12-22 09:28:20,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2021-12-22 09:28:20,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:20,455 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:28:20,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 09:28:20,455 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:20,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:20,456 INFO L85 PathProgramCache]: Analyzing trace with hash 314151990, now seen corresponding path program 1 times [2021-12-22 09:28:20,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:20,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108473991] [2021-12-22 09:28:20,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:20,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:20,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 951 proven. 0 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2021-12-22 09:28:20,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:20,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108473991] [2021-12-22 09:28:20,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108473991] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:20,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:28:20,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 09:28:20,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26971634] [2021-12-22 09:28:20,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:20,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:28:20,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:20,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:28:20,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:28:20,668 INFO L87 Difference]: Start difference. First operand 27656 states and 28711 transitions. Second operand has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:21,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:21,893 INFO L93 Difference]: Finished difference Result 58898 states and 61137 transitions. [2021-12-22 09:28:21,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:28:21,893 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 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 805 [2021-12-22 09:28:21,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:21,928 INFO L225 Difference]: With dead ends: 58898 [2021-12-22 09:28:21,929 INFO L226 Difference]: Without dead ends: 31543 [2021-12-22 09:28:21,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:28:21,947 INFO L933 BasicCegarLoop]: 411 mSDtfsCounter, 622 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1399 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 1654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 1399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:21,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 443 Invalid, 1654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 1399 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 09:28:21,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31543 states. [2021-12-22 09:28:22,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31543 to 29747. [2021-12-22 09:28:22,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29747 states, 29746 states have (on average 1.0297182814496066) internal successors, (30630), 29746 states have internal predecessors, (30630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:22,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29747 states to 29747 states and 30630 transitions. [2021-12-22 09:28:22,336 INFO L78 Accepts]: Start accepts. Automaton has 29747 states and 30630 transitions. Word has length 805 [2021-12-22 09:28:22,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:22,336 INFO L470 AbstractCegarLoop]: Abstraction has 29747 states and 30630 transitions. [2021-12-22 09:28:22,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:22,337 INFO L276 IsEmpty]: Start isEmpty. Operand 29747 states and 30630 transitions. [2021-12-22 09:28:22,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 830 [2021-12-22 09:28:22,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:22,350 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:28:22,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-22 09:28:22,351 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:22,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:22,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1586778385, now seen corresponding path program 1 times [2021-12-22 09:28:22,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:22,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120820651] [2021-12-22 09:28:22,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:22,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:22,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 889 trivial. 0 not checked. [2021-12-22 09:28:22,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:22,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120820651] [2021-12-22 09:28:22,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120820651] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:22,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:28:22,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:28:22,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442557132] [2021-12-22 09:28:22,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:22,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:28:22,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:22,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:28:22,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:28:22,591 INFO L87 Difference]: Start difference. First operand 29747 states and 30630 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:23,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:23,559 INFO L93 Difference]: Finished difference Result 62201 states and 64045 transitions. [2021-12-22 09:28:23,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:28:23,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 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 829 [2021-12-22 09:28:23,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:23,593 INFO L225 Difference]: With dead ends: 62201 [2021-12-22 09:28:23,594 INFO L226 Difference]: Without dead ends: 32456 [2021-12-22 09:28:23,608 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 [2021-12-22 09:28:23,609 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 315 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:23,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 135 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 09:28:23,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32456 states. [2021-12-22 09:28:23,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32456 to 29745. [2021-12-22 09:28:23,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29745 states, 29744 states have (on average 1.0296194190424959) internal successors, (30625), 29744 states have internal predecessors, (30625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:23,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29745 states to 29745 states and 30625 transitions. [2021-12-22 09:28:23,914 INFO L78 Accepts]: Start accepts. Automaton has 29745 states and 30625 transitions. Word has length 829 [2021-12-22 09:28:23,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:23,914 INFO L470 AbstractCegarLoop]: Abstraction has 29745 states and 30625 transitions. [2021-12-22 09:28:23,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:23,915 INFO L276 IsEmpty]: Start isEmpty. Operand 29745 states and 30625 transitions. [2021-12-22 09:28:23,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 863 [2021-12-22 09:28:23,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:23,928 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:28:23,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-22 09:28:23,929 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:23,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:23,929 INFO L85 PathProgramCache]: Analyzing trace with hash 24286981, now seen corresponding path program 1 times [2021-12-22 09:28:23,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:23,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642604231] [2021-12-22 09:28:23,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:23,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:24,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:24,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1324 backedges. 751 proven. 0 refuted. 0 times theorem prover too weak. 573 trivial. 0 not checked. [2021-12-22 09:28:24,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:24,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642604231] [2021-12-22 09:28:24,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642604231] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:24,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:28:24,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:28:24,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822203153] [2021-12-22 09:28:24,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:24,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:28:24,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:24,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:28:24,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:28:24,136 INFO L87 Difference]: Start difference. First operand 29745 states and 30625 transitions. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:24,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:24,876 INFO L93 Difference]: Finished difference Result 54049 states and 55638 transitions. [2021-12-22 09:28:24,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:28:24,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 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 862 [2021-12-22 09:28:24,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:24,904 INFO L225 Difference]: With dead ends: 54049 [2021-12-22 09:28:24,905 INFO L226 Difference]: Without dead ends: 24605 [2021-12-22 09:28:24,915 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 [2021-12-22 09:28:24,916 INFO L933 BasicCegarLoop]: 397 mSDtfsCounter, 340 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:24,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 408 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 09:28:24,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24605 states. [2021-12-22 09:28:25,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24605 to 14702. [2021-12-22 09:28:25,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14702 states, 14701 states have (on average 1.0268689204816) internal successors, (15096), 14701 states have internal predecessors, (15096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:25,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14702 states to 14702 states and 15096 transitions. [2021-12-22 09:28:25,139 INFO L78 Accepts]: Start accepts. Automaton has 14702 states and 15096 transitions. Word has length 862 [2021-12-22 09:28:25,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:25,139 INFO L470 AbstractCegarLoop]: Abstraction has 14702 states and 15096 transitions. [2021-12-22 09:28:25,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:25,140 INFO L276 IsEmpty]: Start isEmpty. Operand 14702 states and 15096 transitions. [2021-12-22 09:28:25,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 896 [2021-12-22 09:28:25,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:25,153 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:28:25,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-22 09:28:25,154 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:25,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:25,154 INFO L85 PathProgramCache]: Analyzing trace with hash -926627041, now seen corresponding path program 1 times [2021-12-22 09:28:25,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:25,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364880553] [2021-12-22 09:28:25,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:25,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:25,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 692 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-12-22 09:28:25,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:25,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364880553] [2021-12-22 09:28:25,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364880553] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:25,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:28:25,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:28:25,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174125965] [2021-12-22 09:28:25,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:25,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:28:25,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:25,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:28:25,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:28:25,464 INFO L87 Difference]: Start difference. First operand 14702 states and 15096 transitions. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:26,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:26,271 INFO L93 Difference]: Finished difference Result 33004 states and 33910 transitions. [2021-12-22 09:28:26,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:28:26,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 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 895 [2021-12-22 09:28:26,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:26,291 INFO L225 Difference]: With dead ends: 33004 [2021-12-22 09:28:26,291 INFO L226 Difference]: Without dead ends: 18603 [2021-12-22 09:28:26,302 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 [2021-12-22 09:28:26,303 INFO L933 BasicCegarLoop]: 443 mSDtfsCounter, 31 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:26,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 469 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 09:28:26,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18603 states. [2021-12-22 09:28:26,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18603 to 17405. [2021-12-22 09:28:26,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17405 states, 17404 states have (on average 1.0241898414157664) internal successors, (17825), 17404 states have internal predecessors, (17825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:26,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17405 states to 17405 states and 17825 transitions. [2021-12-22 09:28:26,516 INFO L78 Accepts]: Start accepts. Automaton has 17405 states and 17825 transitions. Word has length 895 [2021-12-22 09:28:26,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:26,517 INFO L470 AbstractCegarLoop]: Abstraction has 17405 states and 17825 transitions. [2021-12-22 09:28:26,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:26,517 INFO L276 IsEmpty]: Start isEmpty. Operand 17405 states and 17825 transitions. [2021-12-22 09:28:26,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 968 [2021-12-22 09:28:26,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:26,532 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:28:26,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-22 09:28:26,532 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:26,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:26,533 INFO L85 PathProgramCache]: Analyzing trace with hash 625408752, now seen corresponding path program 1 times [2021-12-22 09:28:26,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:26,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833446096] [2021-12-22 09:28:26,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:26,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:26,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1195 backedges. 810 proven. 113 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-22 09:28:26,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:26,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833446096] [2021-12-22 09:28:26,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833446096] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:28:26,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72405197] [2021-12-22 09:28:26,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:26,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:28:26,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:28:26,968 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:28:26,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 09:28:27,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:27,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 09:28:27,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:28:28,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1195 backedges. 730 proven. 32 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2021-12-22 09:28:28,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 09:28:29,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1195 backedges. 762 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2021-12-22 09:28:29,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72405197] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 09:28:29,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-22 09:28:29,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 4] total 12 [2021-12-22 09:28:29,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076619598] [2021-12-22 09:28:29,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:29,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:28:29,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:29,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:28:29,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-22 09:28:29,147 INFO L87 Difference]: Start difference. First operand 17405 states and 17825 transitions. Second operand has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:30,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:30,042 INFO L93 Difference]: Finished difference Result 19507 states and 19958 transitions. [2021-12-22 09:28:30,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:28:30,043 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 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 967 [2021-12-22 09:28:30,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:30,061 INFO L225 Difference]: With dead ends: 19507 [2021-12-22 09:28:30,061 INFO L226 Difference]: Without dead ends: 19206 [2021-12-22 09:28:30,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1941 GetRequests, 1931 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-22 09:28:30,067 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 354 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:30,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 44 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 09:28:30,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19206 states. [2021-12-22 09:28:30,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19206 to 17405. [2021-12-22 09:28:30,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17405 states, 17404 states have (on average 1.0240174672489082) internal successors, (17822), 17404 states have internal predecessors, (17822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:30,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17405 states to 17405 states and 17822 transitions. [2021-12-22 09:28:30,295 INFO L78 Accepts]: Start accepts. Automaton has 17405 states and 17822 transitions. Word has length 967 [2021-12-22 09:28:30,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:30,295 INFO L470 AbstractCegarLoop]: Abstraction has 17405 states and 17822 transitions. [2021-12-22 09:28:30,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:30,296 INFO L276 IsEmpty]: Start isEmpty. Operand 17405 states and 17822 transitions. [2021-12-22 09:28:30,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1502 [2021-12-22 09:28:30,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:30,324 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:28:30,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 09:28:30,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-22 09:28:30,535 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:30,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:30,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1754258623, now seen corresponding path program 1 times [2021-12-22 09:28:30,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:30,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522354728] [2021-12-22 09:28:30,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:30,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3805 backedges. 2163 proven. 0 refuted. 0 times theorem prover too weak. 1642 trivial. 0 not checked. [2021-12-22 09:28:31,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:31,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522354728] [2021-12-22 09:28:31,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522354728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:31,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:28:31,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:28:31,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150693070] [2021-12-22 09:28:31,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:31,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:28:31,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:31,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:28:31,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:28:31,059 INFO L87 Difference]: Start difference. First operand 17405 states and 17822 transitions. Second operand has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)