./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem17_label03.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 89d9992650be4fcd4025f7007fb14b6b521ee1b4b929549cdf6651f6eed1ab75 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 13:12:53,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 13:12:53,105 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 13:12:53,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 13:12:53,142 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 13:12:53,143 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 13:12:53,145 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 13:12:53,147 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 13:12:53,149 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 13:12:53,153 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 13:12:53,154 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 13:12:53,156 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 13:12:53,156 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 13:12:53,158 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 13:12:53,159 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 13:12:53,162 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 13:12:53,163 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 13:12:53,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 13:12:53,166 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 13:12:53,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 13:12:53,173 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 13:12:53,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 13:12:53,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 13:12:53,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 13:12:53,177 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 13:12:53,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 13:12:53,179 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 13:12:53,180 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 13:12:53,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 13:12:53,181 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 13:12:53,182 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 13:12:53,183 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 13:12:53,184 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 13:12:53,184 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 13:12:53,185 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 13:12:53,185 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 13:12:53,186 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 13:12:53,186 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 13:12:53,186 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 13:12:53,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 13:12:53,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 13:12:53,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 13:12:53,190 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 13:12:53,217 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 13:12:53,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 13:12:53,218 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 13:12:53,218 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 13:12:53,219 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 13:12:53,220 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 13:12:53,220 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 13:12:53,220 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 13:12:53,221 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 13:12:53,221 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 13:12:53,222 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 13:12:53,222 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 13:12:53,222 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 13:12:53,222 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 13:12:53,222 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 13:12:53,222 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 13:12:53,222 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 13:12:53,223 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 13:12:53,223 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 13:12:53,223 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 13:12:53,223 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 13:12:53,223 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 13:12:53,223 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 13:12:53,224 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 13:12:53,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 13:12:53,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 13:12:53,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 13:12:53,224 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 13:12:53,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 13:12:53,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 13:12:53,225 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 13:12:53,225 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 13:12:53,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 13:12:53,225 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89d9992650be4fcd4025f7007fb14b6b521ee1b4b929549cdf6651f6eed1ab75 [2022-07-13 13:12:53,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 13:12:53,434 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 13:12:53,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 13:12:53,437 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 13:12:53,438 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 13:12:53,439 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label03.c [2022-07-13 13:12:53,491 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d735f95bb/733993bca14b421cb73deb21a96260e8/FLAGc4b8e49dd [2022-07-13 13:12:53,993 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 13:12:53,994 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label03.c [2022-07-13 13:12:54,010 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d735f95bb/733993bca14b421cb73deb21a96260e8/FLAGc4b8e49dd [2022-07-13 13:12:54,245 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d735f95bb/733993bca14b421cb73deb21a96260e8 [2022-07-13 13:12:54,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 13:12:54,248 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 13:12:54,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 13:12:54,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 13:12:54,252 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 13:12:54,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:12:54" (1/1) ... [2022-07-13 13:12:54,254 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41ad640 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:12:54, skipping insertion in model container [2022-07-13 13:12:54,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:12:54" (1/1) ... [2022-07-13 13:12:54,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 13:12:54,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 13:12:54,534 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label03.c[7281,7294] [2022-07-13 13:12:54,980 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 13:12:54,985 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 13:12:55,035 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label03.c[7281,7294] [2022-07-13 13:12:55,240 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 13:12:55,251 INFO L208 MainTranslator]: Completed translation [2022-07-13 13:12:55,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:12:55 WrapperNode [2022-07-13 13:12:55,251 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 13:12:55,252 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 13:12:55,252 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 13:12:55,252 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 13:12:55,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:12:55" (1/1) ... [2022-07-13 13:12:55,291 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:12:55" (1/1) ... [2022-07-13 13:12:55,510 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2022-07-13 13:12:55,510 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 13:12:55,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 13:12:55,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 13:12:55,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 13:12:55,521 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:12:55" (1/1) ... [2022-07-13 13:12:55,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:12:55" (1/1) ... [2022-07-13 13:12:55,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:12:55" (1/1) ... [2022-07-13 13:12:55,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:12:55" (1/1) ... [2022-07-13 13:12:55,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:12:55" (1/1) ... [2022-07-13 13:12:55,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:12:55" (1/1) ... [2022-07-13 13:12:55,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:12:55" (1/1) ... [2022-07-13 13:12:55,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 13:12:55,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 13:12:55,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 13:12:55,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 13:12:55,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:12:55" (1/1) ... [2022-07-13 13:12:55,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 13:12:55,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:12:55,755 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 13:12:55,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 13:12:55,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 13:12:55,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 13:12:55,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 13:12:55,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 13:12:55,837 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 13:12:55,839 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 13:12:58,296 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 13:12:58,309 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 13:12:58,310 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 13:12:58,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 01:12:58 BoogieIcfgContainer [2022-07-13 13:12:58,313 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 13:12:58,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 13:12:58,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 13:12:58,317 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 13:12:58,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 01:12:54" (1/3) ... [2022-07-13 13:12:58,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1229a23a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 01:12:58, skipping insertion in model container [2022-07-13 13:12:58,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:12:55" (2/3) ... [2022-07-13 13:12:58,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1229a23a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 01:12:58, skipping insertion in model container [2022-07-13 13:12:58,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 01:12:58" (3/3) ... [2022-07-13 13:12:58,320 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label03.c [2022-07-13 13:12:58,330 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 13:12:58,330 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 13:12:58,398 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 13:12:58,403 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5679ce3f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@45a90763 [2022-07-13 13:12:58,403 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 13:12:58,408 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:12:58,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-13 13:12:58,414 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:12:58,414 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:12:58,415 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:12:58,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:12:58,418 INFO L85 PathProgramCache]: Analyzing trace with hash 301649817, now seen corresponding path program 1 times [2022-07-13 13:12:58,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:12:58,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809769491] [2022-07-13 13:12:58,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:12:58,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:12:58,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:12:58,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:12:58,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:12:58,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809769491] [2022-07-13 13:12:58,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809769491] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:12:58,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:12:58,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:12:58,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773187445] [2022-07-13 13:12:58,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:12:58,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:12:58,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:12:58,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:12:58,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:12:58,605 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:00,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:00,884 INFO L93 Difference]: Finished difference Result 1644 states and 3029 transitions. [2022-07-13 13:13:00,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:00,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 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 49 [2022-07-13 13:13:00,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:00,899 INFO L225 Difference]: With dead ends: 1644 [2022-07-13 13:13:00,899 INFO L226 Difference]: Without dead ends: 977 [2022-07-13 13:13:00,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:00,909 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 439 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:00,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 503 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 13:13:00,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-07-13 13:13:00,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 971. [2022-07-13 13:13:00,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.5536082474226804) internal successors, (1507), 970 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:00,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1507 transitions. [2022-07-13 13:13:00,965 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1507 transitions. Word has length 49 [2022-07-13 13:13:00,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:00,966 INFO L495 AbstractCegarLoop]: Abstraction has 971 states and 1507 transitions. [2022-07-13 13:13:00,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:00,966 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1507 transitions. [2022-07-13 13:13:00,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-13 13:13:00,969 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:00,969 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:13:00,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 13:13:00,969 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:00,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:00,970 INFO L85 PathProgramCache]: Analyzing trace with hash -172834846, now seen corresponding path program 1 times [2022-07-13 13:13:00,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:00,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630342264] [2022-07-13 13:13:00,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:00,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:01,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:01,083 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:13:01,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:01,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630342264] [2022-07-13 13:13:01,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630342264] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:01,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:01,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:13:01,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177933207] [2022-07-13 13:13:01,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:01,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:13:01,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:01,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:13:01,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:01,086 INFO L87 Difference]: Start difference. First operand 971 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:03,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:03,101 INFO L93 Difference]: Finished difference Result 2813 states and 4381 transitions. [2022-07-13 13:13:03,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:03,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2022-07-13 13:13:03,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:03,108 INFO L225 Difference]: With dead ends: 2813 [2022-07-13 13:13:03,108 INFO L226 Difference]: Without dead ends: 1844 [2022-07-13 13:13:03,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:03,111 INFO L413 NwaCegarLoop]: 506 mSDtfsCounter, 405 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:03,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 579 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-13 13:13:03,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2022-07-13 13:13:03,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1841. [2022-07-13 13:13:03,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.35) internal successors, (2484), 1840 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:03,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2484 transitions. [2022-07-13 13:13:03,149 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2484 transitions. Word has length 116 [2022-07-13 13:13:03,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:03,150 INFO L495 AbstractCegarLoop]: Abstraction has 1841 states and 2484 transitions. [2022-07-13 13:13:03,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:03,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2484 transitions. [2022-07-13 13:13:03,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-13 13:13:03,153 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:03,153 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:13:03,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 13:13:03,153 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:03,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:03,154 INFO L85 PathProgramCache]: Analyzing trace with hash -807304596, now seen corresponding path program 1 times [2022-07-13 13:13:03,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:03,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576018503] [2022-07-13 13:13:03,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:03,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:03,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:03,322 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:13:03,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:03,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576018503] [2022-07-13 13:13:03,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576018503] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:03,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:03,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:13:03,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592782793] [2022-07-13 13:13:03,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:03,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:13:03,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:03,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:13:03,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:03,327 INFO L87 Difference]: Start difference. First operand 1841 states and 2484 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:05,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:05,157 INFO L93 Difference]: Finished difference Result 4552 states and 6282 transitions. [2022-07-13 13:13:05,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:05,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2022-07-13 13:13:05,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:05,165 INFO L225 Difference]: With dead ends: 4552 [2022-07-13 13:13:05,166 INFO L226 Difference]: Without dead ends: 2713 [2022-07-13 13:13:05,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:05,169 INFO L413 NwaCegarLoop]: 818 mSDtfsCounter, 458 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:05,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 886 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 13:13:05,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2022-07-13 13:13:05,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2711. [2022-07-13 13:13:05,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2710 states have (on average 1.3003690036900368) internal successors, (3524), 2710 states have internal predecessors, (3524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:05,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 3524 transitions. [2022-07-13 13:13:05,203 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 3524 transitions. Word has length 119 [2022-07-13 13:13:05,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:05,204 INFO L495 AbstractCegarLoop]: Abstraction has 2711 states and 3524 transitions. [2022-07-13 13:13:05,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:05,204 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 3524 transitions. [2022-07-13 13:13:05,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-07-13 13:13:05,206 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:05,206 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 13:13:05,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 13:13:05,207 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:05,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:05,207 INFO L85 PathProgramCache]: Analyzing trace with hash 182092692, now seen corresponding path program 1 times [2022-07-13 13:13:05,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:05,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714212189] [2022-07-13 13:13:05,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:05,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:05,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:05,322 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-13 13:13:05,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:05,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714212189] [2022-07-13 13:13:05,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714212189] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:05,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:05,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:13:05,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736576153] [2022-07-13 13:13:05,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:05,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:13:05,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:05,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:13:05,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:05,324 INFO L87 Difference]: Start difference. First operand 2711 states and 3524 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:07,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:07,000 INFO L93 Difference]: Finished difference Result 7984 states and 10361 transitions. [2022-07-13 13:13:07,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:07,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2022-07-13 13:13:07,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:07,014 INFO L225 Difference]: With dead ends: 7984 [2022-07-13 13:13:07,014 INFO L226 Difference]: Without dead ends: 4421 [2022-07-13 13:13:07,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:07,026 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:07,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 13:13:07,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4421 states. [2022-07-13 13:13:07,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4421 to 3571. [2022-07-13 13:13:07,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 3570 states have (on average 1.1775910364145659) internal successors, (4204), 3570 states have internal predecessors, (4204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:07,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 4204 transitions. [2022-07-13 13:13:07,083 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 4204 transitions. Word has length 188 [2022-07-13 13:13:07,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:07,084 INFO L495 AbstractCegarLoop]: Abstraction has 3571 states and 4204 transitions. [2022-07-13 13:13:07,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:07,085 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 4204 transitions. [2022-07-13 13:13:07,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-07-13 13:13:07,088 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:07,089 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 13:13:07,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 13:13:07,089 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:07,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:07,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1924874294, now seen corresponding path program 1 times [2022-07-13 13:13:07,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:07,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220059869] [2022-07-13 13:13:07,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:07,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:07,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:13:07,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:07,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220059869] [2022-07-13 13:13:07,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220059869] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:07,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:07,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:13:07,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018560443] [2022-07-13 13:13:07,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:07,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:13:07,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:07,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:13:07,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:07,219 INFO L87 Difference]: Start difference. First operand 3571 states and 4204 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:08,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:08,618 INFO L93 Difference]: Finished difference Result 9273 states and 11087 transitions. [2022-07-13 13:13:08,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:08,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 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 201 [2022-07-13 13:13:08,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:08,633 INFO L225 Difference]: With dead ends: 9273 [2022-07-13 13:13:08,633 INFO L226 Difference]: Without dead ends: 5704 [2022-07-13 13:13:08,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:08,637 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:08,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 784 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-13 13:13:08,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5704 states. [2022-07-13 13:13:08,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5704 to 5704. [2022-07-13 13:13:08,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5704 states, 5703 states have (on average 1.1595651411537786) internal successors, (6613), 5703 states have internal predecessors, (6613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:08,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5704 states to 5704 states and 6613 transitions. [2022-07-13 13:13:08,709 INFO L78 Accepts]: Start accepts. Automaton has 5704 states and 6613 transitions. Word has length 201 [2022-07-13 13:13:08,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:08,709 INFO L495 AbstractCegarLoop]: Abstraction has 5704 states and 6613 transitions. [2022-07-13 13:13:08,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:08,710 INFO L276 IsEmpty]: Start isEmpty. Operand 5704 states and 6613 transitions. [2022-07-13 13:13:08,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-07-13 13:13:08,711 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:08,712 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2022-07-13 13:13:08,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 13:13:08,712 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:08,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:08,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1110667493, now seen corresponding path program 1 times [2022-07-13 13:13:08,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:08,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259924706] [2022-07-13 13:13:08,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:08,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:08,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:08,788 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-13 13:13:08,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:08,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259924706] [2022-07-13 13:13:08,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259924706] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:08,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:08,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:13:08,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869983163] [2022-07-13 13:13:08,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:08,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:13:08,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:08,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:13:08,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:08,790 INFO L87 Difference]: Start difference. First operand 5704 states and 6613 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:10,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:10,335 INFO L93 Difference]: Finished difference Result 14376 states and 16776 transitions. [2022-07-13 13:13:10,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:10,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2022-07-13 13:13:10,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:10,357 INFO L225 Difference]: With dead ends: 14376 [2022-07-13 13:13:10,357 INFO L226 Difference]: Without dead ends: 8673 [2022-07-13 13:13:10,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:10,365 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 402 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:10,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 444 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 13:13:10,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8673 states. [2022-07-13 13:13:10,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8673 to 5677. [2022-07-13 13:13:10,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5677 states, 5676 states have (on average 1.1578576462297392) internal successors, (6572), 5676 states have internal predecessors, (6572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:10,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5677 states to 5677 states and 6572 transitions. [2022-07-13 13:13:10,457 INFO L78 Accepts]: Start accepts. Automaton has 5677 states and 6572 transitions. Word has length 203 [2022-07-13 13:13:10,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:10,457 INFO L495 AbstractCegarLoop]: Abstraction has 5677 states and 6572 transitions. [2022-07-13 13:13:10,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:10,458 INFO L276 IsEmpty]: Start isEmpty. Operand 5677 states and 6572 transitions. [2022-07-13 13:13:10,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-07-13 13:13:10,460 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:10,460 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:13:10,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 13:13:10,461 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:10,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:10,461 INFO L85 PathProgramCache]: Analyzing trace with hash -145584583, now seen corresponding path program 1 times [2022-07-13 13:13:10,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:10,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802885606] [2022-07-13 13:13:10,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:10,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:10,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 273 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-13 13:13:10,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:10,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802885606] [2022-07-13 13:13:10,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802885606] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:10,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:10,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:13:10,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205520400] [2022-07-13 13:13:10,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:10,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:13:10,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:10,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:13:10,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:10,606 INFO L87 Difference]: Start difference. First operand 5677 states and 6572 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:12,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:12,259 INFO L93 Difference]: Finished difference Result 13935 states and 16238 transitions. [2022-07-13 13:13:12,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:12,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 281 [2022-07-13 13:13:12,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:12,278 INFO L225 Difference]: With dead ends: 13935 [2022-07-13 13:13:12,278 INFO L226 Difference]: Without dead ends: 7832 [2022-07-13 13:13:12,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:12,285 INFO L413 NwaCegarLoop]: 586 mSDtfsCounter, 495 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:12,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 629 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 13:13:12,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7832 states. [2022-07-13 13:13:12,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7832 to 7402. [2022-07-13 13:13:12,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7402 states, 7401 states have (on average 1.1638967707066612) internal successors, (8614), 7401 states have internal predecessors, (8614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:12,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7402 states to 7402 states and 8614 transitions. [2022-07-13 13:13:12,385 INFO L78 Accepts]: Start accepts. Automaton has 7402 states and 8614 transitions. Word has length 281 [2022-07-13 13:13:12,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:12,386 INFO L495 AbstractCegarLoop]: Abstraction has 7402 states and 8614 transitions. [2022-07-13 13:13:12,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:12,386 INFO L276 IsEmpty]: Start isEmpty. Operand 7402 states and 8614 transitions. [2022-07-13 13:13:12,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-07-13 13:13:12,389 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:12,389 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:13:12,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 13:13:12,389 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:12,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:12,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1693576314, now seen corresponding path program 1 times [2022-07-13 13:13:12,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:12,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718492028] [2022-07-13 13:13:12,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:12,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:12,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:12,477 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-13 13:13:12,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:12,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718492028] [2022-07-13 13:13:12,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718492028] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:12,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:12,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:13:12,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876842725] [2022-07-13 13:13:12,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:12,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:13:12,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:12,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:13:12,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:12,480 INFO L87 Difference]: Start difference. First operand 7402 states and 8614 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:14,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:14,123 INFO L93 Difference]: Finished difference Result 19038 states and 22311 transitions. [2022-07-13 13:13:14,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:14,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 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 286 [2022-07-13 13:13:14,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:14,156 INFO L225 Difference]: With dead ends: 19038 [2022-07-13 13:13:14,157 INFO L226 Difference]: Without dead ends: 11213 [2022-07-13 13:13:14,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:14,166 INFO L413 NwaCegarLoop]: 775 mSDtfsCounter, 379 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:14,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 842 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 13:13:14,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11213 states. [2022-07-13 13:13:14,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11213 to 10363. [2022-07-13 13:13:14,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10363 states, 10362 states have (on average 1.132117351862575) internal successors, (11731), 10362 states have internal predecessors, (11731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:14,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10363 states to 10363 states and 11731 transitions. [2022-07-13 13:13:14,289 INFO L78 Accepts]: Start accepts. Automaton has 10363 states and 11731 transitions. Word has length 286 [2022-07-13 13:13:14,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:14,289 INFO L495 AbstractCegarLoop]: Abstraction has 10363 states and 11731 transitions. [2022-07-13 13:13:14,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:14,290 INFO L276 IsEmpty]: Start isEmpty. Operand 10363 states and 11731 transitions. [2022-07-13 13:13:14,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-07-13 13:13:14,293 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:14,293 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:13:14,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 13:13:14,293 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:14,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:14,294 INFO L85 PathProgramCache]: Analyzing trace with hash -968764252, now seen corresponding path program 1 times [2022-07-13 13:13:14,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:14,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122444255] [2022-07-13 13:13:14,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:14,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:14,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 273 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 13:13:14,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:14,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122444255] [2022-07-13 13:13:14,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122444255] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:14,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:14,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:13:14,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232765093] [2022-07-13 13:13:14,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:14,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:13:14,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:14,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:13:14,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:14,391 INFO L87 Difference]: Start difference. First operand 10363 states and 11731 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:16,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:16,002 INFO L93 Difference]: Finished difference Result 24567 states and 27907 transitions. [2022-07-13 13:13:16,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:16,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 304 [2022-07-13 13:13:16,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:16,023 INFO L225 Difference]: With dead ends: 24567 [2022-07-13 13:13:16,023 INFO L226 Difference]: Without dead ends: 13774 [2022-07-13 13:13:16,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:16,034 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 444 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:16,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 295 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 13:13:16,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13774 states. [2022-07-13 13:13:16,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13774 to 12918. [2022-07-13 13:13:16,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12918 states, 12917 states have (on average 1.1388867384067507) internal successors, (14711), 12917 states have internal predecessors, (14711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:16,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12918 states to 12918 states and 14711 transitions. [2022-07-13 13:13:16,207 INFO L78 Accepts]: Start accepts. Automaton has 12918 states and 14711 transitions. Word has length 304 [2022-07-13 13:13:16,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:16,209 INFO L495 AbstractCegarLoop]: Abstraction has 12918 states and 14711 transitions. [2022-07-13 13:13:16,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:16,210 INFO L276 IsEmpty]: Start isEmpty. Operand 12918 states and 14711 transitions. [2022-07-13 13:13:16,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-07-13 13:13:16,213 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:16,213 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:13:16,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 13:13:16,214 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:16,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:16,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1120603921, now seen corresponding path program 1 times [2022-07-13 13:13:16,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:16,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028347928] [2022-07-13 13:13:16,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:16,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:16,361 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 293 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:13:16,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:16,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028347928] [2022-07-13 13:13:16,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028347928] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:13:16,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022333987] [2022-07-13 13:13:16,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:16,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:13:16,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:13:16,364 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 13:13:16,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 13:13:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:16,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 13:13:16,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:13:16,944 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 236 proven. 82 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-07-13 13:13:16,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 13:13:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 236 proven. 82 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-07-13 13:13:17,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022333987] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 13:13:17,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 13:13:17,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2022-07-13 13:13:17,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733896313] [2022-07-13 13:13:17,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 13:13:17,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 13:13:17,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:17,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 13:13:17,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-13 13:13:17,675 INFO L87 Difference]: Start difference. First operand 12918 states and 14711 transitions. Second operand has 9 states, 9 states have (on average 84.44444444444444) internal successors, (760), 9 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:30,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:30,797 INFO L93 Difference]: Finished difference Result 72324 states and 82154 transitions. [2022-07-13 13:13:30,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 13:13:30,798 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 84.44444444444444) internal successors, (760), 9 states have internal predecessors, (760), 0 states have call successors, (0), 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 309 [2022-07-13 13:13:30,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:30,903 INFO L225 Difference]: With dead ends: 72324 [2022-07-13 13:13:30,903 INFO L226 Difference]: Without dead ends: 55574 [2022-07-13 13:13:30,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 628 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2022-07-13 13:13:30,921 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 12615 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 14182 mSolverCounterSat, 2714 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12615 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 16896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2714 IncrementalHoareTripleChecker+Valid, 14182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:30,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12615 Valid, 584 Invalid, 16896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2714 Valid, 14182 Invalid, 0 Unknown, 0 Unchecked, 12.3s Time] [2022-07-13 13:13:30,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55574 states. [2022-07-13 13:13:31,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55574 to 45745. [2022-07-13 13:13:31,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45745 states, 45744 states have (on average 1.1340066456803077) internal successors, (51874), 45744 states have internal predecessors, (51874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:31,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45745 states to 45745 states and 51874 transitions. [2022-07-13 13:13:31,526 INFO L78 Accepts]: Start accepts. Automaton has 45745 states and 51874 transitions. Word has length 309 [2022-07-13 13:13:31,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:31,526 INFO L495 AbstractCegarLoop]: Abstraction has 45745 states and 51874 transitions. [2022-07-13 13:13:31,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 84.44444444444444) internal successors, (760), 9 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:31,526 INFO L276 IsEmpty]: Start isEmpty. Operand 45745 states and 51874 transitions. [2022-07-13 13:13:31,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2022-07-13 13:13:31,530 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:31,530 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 13:13:31,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 13:13:31,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-13 13:13:31,744 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:31,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:31,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1219629045, now seen corresponding path program 1 times [2022-07-13 13:13:31,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:31,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743617484] [2022-07-13 13:13:31,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:31,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:31,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:31,843 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 13:13:31,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:31,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743617484] [2022-07-13 13:13:31,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743617484] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:31,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:31,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:13:31,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316994356] [2022-07-13 13:13:31,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:31,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:13:31,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:31,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:13:31,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:31,847 INFO L87 Difference]: Start difference. First operand 45745 states and 51874 transitions. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:33,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:33,520 INFO L93 Difference]: Finished difference Result 89355 states and 101386 transitions. [2022-07-13 13:13:33,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:33,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 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 336 [2022-07-13 13:13:33,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:33,581 INFO L225 Difference]: With dead ends: 89355 [2022-07-13 13:13:33,582 INFO L226 Difference]: Without dead ends: 44037 [2022-07-13 13:13:33,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:33,610 INFO L413 NwaCegarLoop]: 671 mSDtfsCounter, 455 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 1218 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:33,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 736 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1218 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 13:13:33,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44037 states. [2022-07-13 13:13:34,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44037 to 43610. [2022-07-13 13:13:34,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43610 states, 43609 states have (on average 1.1010341901900984) internal successors, (48015), 43609 states have internal predecessors, (48015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:34,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43610 states to 43610 states and 48015 transitions. [2022-07-13 13:13:34,202 INFO L78 Accepts]: Start accepts. Automaton has 43610 states and 48015 transitions. Word has length 336 [2022-07-13 13:13:34,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:34,202 INFO L495 AbstractCegarLoop]: Abstraction has 43610 states and 48015 transitions. [2022-07-13 13:13:34,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:34,203 INFO L276 IsEmpty]: Start isEmpty. Operand 43610 states and 48015 transitions. [2022-07-13 13:13:34,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2022-07-13 13:13:34,206 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:34,207 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:13:34,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 13:13:34,207 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:34,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:34,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1217593932, now seen corresponding path program 1 times [2022-07-13 13:13:34,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:34,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785081102] [2022-07-13 13:13:34,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:34,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:34,328 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-07-13 13:13:34,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:34,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785081102] [2022-07-13 13:13:34,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785081102] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:34,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:34,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:13:34,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209194692] [2022-07-13 13:13:34,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:34,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:13:34,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:34,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:13:34,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:34,330 INFO L87 Difference]: Start difference. First operand 43610 states and 48015 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:36,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:36,455 INFO L93 Difference]: Finished difference Result 110697 states and 121863 transitions. [2022-07-13 13:13:36,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:36,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 396 [2022-07-13 13:13:36,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:36,532 INFO L225 Difference]: With dead ends: 110697 [2022-07-13 13:13:36,533 INFO L226 Difference]: Without dead ends: 67074 [2022-07-13 13:13:36,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:36,550 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 475 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:36,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 212 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-13 13:13:36,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67074 states. [2022-07-13 13:13:37,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67074 to 64910. [2022-07-13 13:13:37,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64910 states, 64909 states have (on average 1.0915589517632378) internal successors, (70852), 64909 states have internal predecessors, (70852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:37,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64910 states to 64910 states and 70852 transitions. [2022-07-13 13:13:37,309 INFO L78 Accepts]: Start accepts. Automaton has 64910 states and 70852 transitions. Word has length 396 [2022-07-13 13:13:37,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:37,310 INFO L495 AbstractCegarLoop]: Abstraction has 64910 states and 70852 transitions. [2022-07-13 13:13:37,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:37,310 INFO L276 IsEmpty]: Start isEmpty. Operand 64910 states and 70852 transitions. [2022-07-13 13:13:37,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-07-13 13:13:37,318 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:37,318 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 13:13:37,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 13:13:37,319 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:37,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:37,319 INFO L85 PathProgramCache]: Analyzing trace with hash 2020271132, now seen corresponding path program 1 times [2022-07-13 13:13:37,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:37,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816105730] [2022-07-13 13:13:37,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:37,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:37,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:37,590 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 340 proven. 0 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2022-07-13 13:13:37,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:37,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816105730] [2022-07-13 13:13:37,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816105730] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:37,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:37,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:13:37,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996640993] [2022-07-13 13:13:37,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:37,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:13:37,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:37,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:13:37,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:37,593 INFO L87 Difference]: Start difference. First operand 64910 states and 70852 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:38,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:38,741 INFO L93 Difference]: Finished difference Result 126827 states and 138388 transitions. [2022-07-13 13:13:38,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:38,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 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 455 [2022-07-13 13:13:38,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:38,801 INFO L225 Difference]: With dead ends: 126827 [2022-07-13 13:13:38,801 INFO L226 Difference]: Without dead ends: 62343 [2022-07-13 13:13:38,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:13:38,828 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 637 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:38,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 102 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 13:13:38,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62343 states. [2022-07-13 13:13:39,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62343 to 62332. [2022-07-13 13:13:39,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62332 states, 62331 states have (on average 1.0897306316279218) internal successors, (67924), 62331 states have internal predecessors, (67924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:39,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62332 states to 62332 states and 67924 transitions. [2022-07-13 13:13:39,494 INFO L78 Accepts]: Start accepts. Automaton has 62332 states and 67924 transitions. Word has length 455 [2022-07-13 13:13:39,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:39,495 INFO L495 AbstractCegarLoop]: Abstraction has 62332 states and 67924 transitions. [2022-07-13 13:13:39,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:39,495 INFO L276 IsEmpty]: Start isEmpty. Operand 62332 states and 67924 transitions. [2022-07-13 13:13:39,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2022-07-13 13:13:39,505 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:39,506 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 13:13:39,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 13:13:39,506 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:39,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:39,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1958053970, now seen corresponding path program 1 times [2022-07-13 13:13:39,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:39,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130781296] [2022-07-13 13:13:39,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:39,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 402 proven. 0 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-07-13 13:13:39,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:39,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130781296] [2022-07-13 13:13:39,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130781296] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:39,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:39,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 13:13:39,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014760937] [2022-07-13 13:13:39,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:39,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:13:39,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:39,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:13:39,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:13:39,845 INFO L87 Difference]: Start difference. First operand 62332 states and 67924 transitions. Second operand has 4 states, 4 states have (on average 68.5) internal successors, (274), 4 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:42,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:42,394 INFO L93 Difference]: Finished difference Result 140024 states and 152285 transitions. [2022-07-13 13:13:42,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:13:42,395 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 68.5) internal successors, (274), 4 states have internal predecessors, (274), 0 states have call successors, (0), 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 495 [2022-07-13 13:13:42,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:42,476 INFO L225 Difference]: With dead ends: 140024 [2022-07-13 13:13:42,477 INFO L226 Difference]: Without dead ends: 77693 [2022-07-13 13:13:42,509 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:13:42,509 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 893 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2269 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 2592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 2269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:42,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [893 Valid, 253 Invalid, 2592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 2269 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-13 13:13:42,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77693 states. [2022-07-13 13:13:43,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77693 to 59337. [2022-07-13 13:13:43,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59337 states, 59336 states have (on average 1.082361466900364) internal successors, (64223), 59336 states have internal predecessors, (64223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:43,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59337 states to 59337 states and 64223 transitions. [2022-07-13 13:13:43,331 INFO L78 Accepts]: Start accepts. Automaton has 59337 states and 64223 transitions. Word has length 495 [2022-07-13 13:13:43,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:43,332 INFO L495 AbstractCegarLoop]: Abstraction has 59337 states and 64223 transitions. [2022-07-13 13:13:43,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.5) internal successors, (274), 4 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:43,332 INFO L276 IsEmpty]: Start isEmpty. Operand 59337 states and 64223 transitions. [2022-07-13 13:13:43,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2022-07-13 13:13:43,342 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:43,342 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:13:43,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 13:13:43,343 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:43,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:43,343 INFO L85 PathProgramCache]: Analyzing trace with hash -564339835, now seen corresponding path program 1 times [2022-07-13 13:13:43,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:43,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658906864] [2022-07-13 13:13:43,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:43,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:43,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:43,488 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 414 proven. 82 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-13 13:13:43,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:43,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658906864] [2022-07-13 13:13:43,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658906864] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:13:43,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318013521] [2022-07-13 13:13:43,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:43,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:13:43,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:13:43,490 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 13:13:43,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 13:13:43,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:43,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 13:13:43,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:13:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 414 proven. 82 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-13 13:13:44,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 13:13:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 496 proven. 0 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-13 13:13:44,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318013521] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 13:13:44,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 13:13:44,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2022-07-13 13:13:44,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758718933] [2022-07-13 13:13:44,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:44,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:13:44,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:44,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:13:44,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-13 13:13:44,475 INFO L87 Difference]: Start difference. First operand 59337 states and 64223 transitions. Second operand has 4 states, 4 states have (on average 96.75) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:47,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:47,375 INFO L93 Difference]: Finished difference Result 147196 states and 159116 transitions. [2022-07-13 13:13:47,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:13:47,375 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 96.75) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 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 504 [2022-07-13 13:13:47,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:47,461 INFO L225 Difference]: With dead ends: 147196 [2022-07-13 13:13:47,462 INFO L226 Difference]: Without dead ends: 88286 [2022-07-13 13:13:47,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1009 GetRequests, 1003 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-13 13:13:47,479 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 818 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1845 mSolverCounterSat, 567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 2412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 567 IncrementalHoareTripleChecker+Valid, 1845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:47,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [818 Valid, 107 Invalid, 2412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [567 Valid, 1845 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 13:13:47,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88286 states. [2022-07-13 13:13:48,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88286 to 83986. [2022-07-13 13:13:48,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83986 states, 83985 states have (on average 1.0732868964696076) internal successors, (90140), 83985 states have internal predecessors, (90140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:48,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83986 states to 83986 states and 90140 transitions. [2022-07-13 13:13:48,588 INFO L78 Accepts]: Start accepts. Automaton has 83986 states and 90140 transitions. Word has length 504 [2022-07-13 13:13:48,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:48,589 INFO L495 AbstractCegarLoop]: Abstraction has 83986 states and 90140 transitions. [2022-07-13 13:13:48,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 96.75) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:48,589 INFO L276 IsEmpty]: Start isEmpty. Operand 83986 states and 90140 transitions. [2022-07-13 13:13:48,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2022-07-13 13:13:48,598 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:48,598 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 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, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:13:48,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 13:13:48,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-13 13:13:48,801 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:48,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:48,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1515115607, now seen corresponding path program 1 times [2022-07-13 13:13:48,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:48,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998401750] [2022-07-13 13:13:48,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:48,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:48,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:48,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 715 proven. 72 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-07-13 13:13:48,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:48,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998401750] [2022-07-13 13:13:48,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998401750] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:13:48,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982974378] [2022-07-13 13:13:48,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:48,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:13:48,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:13:49,001 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 13:13:49,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 13:13:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:49,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 13:13:49,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:13:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 547 proven. 216 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2022-07-13 13:13:50,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 13:13:50,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 521 proven. 0 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2022-07-13 13:13:50,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982974378] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 13:13:50,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 13:13:50,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 8 [2022-07-13 13:13:50,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618017869] [2022-07-13 13:13:50,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:50,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:13:50,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:50,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:13:50,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 13:13:50,300 INFO L87 Difference]: Start difference. First operand 83986 states and 90140 transitions. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:52,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:52,456 INFO L93 Difference]: Finished difference Result 177762 states and 190553 transitions. [2022-07-13 13:13:52,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:13:52,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 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 513 [2022-07-13 13:13:52,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:52,562 INFO L225 Difference]: With dead ends: 177762 [2022-07-13 13:13:52,563 INFO L226 Difference]: Without dead ends: 94203 [2022-07-13 13:13:52,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1029 GetRequests, 1023 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 13:13:52,605 INFO L413 NwaCegarLoop]: 725 mSDtfsCounter, 388 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:52,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 765 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1256 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-13 13:13:52,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94203 states. [2022-07-13 13:13:53,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94203 to 90357. [2022-07-13 13:13:53,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90357 states, 90356 states have (on average 1.0645668245606268) internal successors, (96190), 90356 states have internal predecessors, (96190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:53,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90357 states to 90357 states and 96190 transitions. [2022-07-13 13:13:53,762 INFO L78 Accepts]: Start accepts. Automaton has 90357 states and 96190 transitions. Word has length 513 [2022-07-13 13:13:53,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:53,762 INFO L495 AbstractCegarLoop]: Abstraction has 90357 states and 96190 transitions. [2022-07-13 13:13:53,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:53,762 INFO L276 IsEmpty]: Start isEmpty. Operand 90357 states and 96190 transitions. [2022-07-13 13:13:53,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2022-07-13 13:13:53,772 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:53,772 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:13:53,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-13 13:13:53,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:13:53,990 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:53,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:53,990 INFO L85 PathProgramCache]: Analyzing trace with hash 589170808, now seen corresponding path program 1 times [2022-07-13 13:13:53,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:53,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517009346] [2022-07-13 13:13:53,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:53,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:54,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 793 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-07-13 13:13:54,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:54,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517009346] [2022-07-13 13:13:54,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517009346] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:13:54,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:13:54,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 13:13:54,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182318598] [2022-07-13 13:13:54,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:13:54,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:13:54,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:13:54,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:13:54,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:13:54,362 INFO L87 Difference]: Start difference. First operand 90357 states and 96190 transitions. Second operand has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:57,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:13:57,391 INFO L93 Difference]: Finished difference Result 214793 states and 228199 transitions. [2022-07-13 13:13:57,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:13:57,392 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 519 [2022-07-13 13:13:57,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:13:57,555 INFO L225 Difference]: With dead ends: 214793 [2022-07-13 13:13:57,555 INFO L226 Difference]: Without dead ends: 124863 [2022-07-13 13:13:57,614 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:13:57,614 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 840 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2341 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 2778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 2341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 13:13:57,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [840 Valid, 186 Invalid, 2778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 2341 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 13:13:57,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124863 states. [2022-07-13 13:13:59,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124863 to 117625. [2022-07-13 13:13:59,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117625 states, 117624 states have (on average 1.0620536625178536) internal successors, (124923), 117624 states have internal predecessors, (124923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:59,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117625 states to 117625 states and 124923 transitions. [2022-07-13 13:13:59,236 INFO L78 Accepts]: Start accepts. Automaton has 117625 states and 124923 transitions. Word has length 519 [2022-07-13 13:13:59,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:13:59,237 INFO L495 AbstractCegarLoop]: Abstraction has 117625 states and 124923 transitions. [2022-07-13 13:13:59,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:13:59,237 INFO L276 IsEmpty]: Start isEmpty. Operand 117625 states and 124923 transitions. [2022-07-13 13:13:59,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2022-07-13 13:13:59,248 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:13:59,248 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:13:59,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 13:13:59,249 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:13:59,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:13:59,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1068627681, now seen corresponding path program 1 times [2022-07-13 13:13:59,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:13:59,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312114496] [2022-07-13 13:13:59,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:59,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:13:59,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:59,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1078 backedges. 750 proven. 89 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-07-13 13:13:59,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:13:59,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312114496] [2022-07-13 13:13:59,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312114496] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:13:59,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906497934] [2022-07-13 13:13:59,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:13:59,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:13:59,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:13:59,406 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 13:13:59,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 13:13:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:13:59,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 13:13:59,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:14:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1078 backedges. 952 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-07-13 13:14:00,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 13:14:00,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906497934] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:14:00,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 13:14:00,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-07-13 13:14:00,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926940532] [2022-07-13 13:14:00,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:14:00,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:14:00,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:14:00,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:14:00,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-13 13:14:00,205 INFO L87 Difference]: Start difference. First operand 117625 states and 124923 transitions. Second operand has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:02,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:14:02,985 INFO L93 Difference]: Finished difference Result 247602 states and 262833 transitions. [2022-07-13 13:14:02,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:14:02,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 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 530 [2022-07-13 13:14:02,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:14:03,148 INFO L225 Difference]: With dead ends: 247602 [2022-07-13 13:14:03,148 INFO L226 Difference]: Without dead ends: 130404 [2022-07-13 13:14:03,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 529 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-13 13:14:03,206 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 758 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2116 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 2329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 2116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 13:14:03,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [758 Valid, 308 Invalid, 2329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 2116 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 13:14:03,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130404 states. [2022-07-13 13:14:04,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130404 to 126991. [2022-07-13 13:14:04,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126991 states, 126990 states have (on average 1.0588944011339476) internal successors, (134469), 126990 states have internal predecessors, (134469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:04,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126991 states to 126991 states and 134469 transitions. [2022-07-13 13:14:04,946 INFO L78 Accepts]: Start accepts. Automaton has 126991 states and 134469 transitions. Word has length 530 [2022-07-13 13:14:04,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:14:04,946 INFO L495 AbstractCegarLoop]: Abstraction has 126991 states and 134469 transitions. [2022-07-13 13:14:04,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:04,946 INFO L276 IsEmpty]: Start isEmpty. Operand 126991 states and 134469 transitions. [2022-07-13 13:14:04,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 565 [2022-07-13 13:14:04,959 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:14:04,959 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 13:14:04,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-13 13:14:05,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-13 13:14:05,166 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:14:05,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:14:05,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1090391391, now seen corresponding path program 1 times [2022-07-13 13:14:05,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:14:05,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417767490] [2022-07-13 13:14:05,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:05,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:14:05,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:05,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 802 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-07-13 13:14:05,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:14:05,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417767490] [2022-07-13 13:14:05,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417767490] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:14:05,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:14:05,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 13:14:05,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107866595] [2022-07-13 13:14:05,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:14:05,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:14:05,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:14:05,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:14:05,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:14:05,348 INFO L87 Difference]: Start difference. First operand 126991 states and 134469 transitions. Second operand has 4 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:08,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:14:08,687 INFO L93 Difference]: Finished difference Result 291895 states and 308533 transitions. [2022-07-13 13:14:08,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:14:08,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 0 states have call successors, (0), 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 564 [2022-07-13 13:14:08,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:14:08,877 INFO L225 Difference]: With dead ends: 291895 [2022-07-13 13:14:08,877 INFO L226 Difference]: Without dead ends: 165331 [2022-07-13 13:14:08,920 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:14:08,920 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 779 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 2400 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 2838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 2400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:14:08,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [779 Valid, 226 Invalid, 2838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 2400 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-13 13:14:09,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165331 states. [2022-07-13 13:14:11,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165331 to 158092. [2022-07-13 13:14:11,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158092 states, 158091 states have (on average 1.0550821994926973) internal successors, (166799), 158091 states have internal predecessors, (166799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:11,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158092 states to 158092 states and 166799 transitions. [2022-07-13 13:14:11,266 INFO L78 Accepts]: Start accepts. Automaton has 158092 states and 166799 transitions. Word has length 564 [2022-07-13 13:14:11,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:14:11,266 INFO L495 AbstractCegarLoop]: Abstraction has 158092 states and 166799 transitions. [2022-07-13 13:14:11,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:11,266 INFO L276 IsEmpty]: Start isEmpty. Operand 158092 states and 166799 transitions. [2022-07-13 13:14:11,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2022-07-13 13:14:11,277 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:14:11,277 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:14:11,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-13 13:14:11,277 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:14:11,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:14:11,278 INFO L85 PathProgramCache]: Analyzing trace with hash 345832821, now seen corresponding path program 1 times [2022-07-13 13:14:11,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:14:11,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688074361] [2022-07-13 13:14:11,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:11,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:14:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:11,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 521 proven. 0 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2022-07-13 13:14:11,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:14:11,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688074361] [2022-07-13 13:14:11,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688074361] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:14:11,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:14:11,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 13:14:11,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028962373] [2022-07-13 13:14:11,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:14:11,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 13:14:11,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:14:11,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 13:14:11,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-13 13:14:11,427 INFO L87 Difference]: Start difference. First operand 158092 states and 166799 transitions. Second operand has 5 states, 5 states have (on average 57.2) internal successors, (286), 5 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:15,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:14:15,817 INFO L93 Difference]: Finished difference Result 391579 states and 412382 transitions. [2022-07-13 13:14:15,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 13:14:15,832 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 57.2) internal successors, (286), 5 states have internal predecessors, (286), 0 states have call successors, (0), 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 569 [2022-07-13 13:14:15,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:14:16,140 INFO L225 Difference]: With dead ends: 391579 [2022-07-13 13:14:16,140 INFO L226 Difference]: Without dead ends: 231362 [2022-07-13 13:14:16,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-13 13:14:16,219 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 1356 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3969 mSolverCounterSat, 541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 4510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 541 IncrementalHoareTripleChecker+Valid, 3969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-13 13:14:16,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1356 Valid, 255 Invalid, 4510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [541 Valid, 3969 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-13 13:14:16,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231362 states. [2022-07-13 13:14:19,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231362 to 218542. [2022-07-13 13:14:19,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218542 states, 218541 states have (on average 1.0507090202753717) internal successors, (229623), 218541 states have internal predecessors, (229623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:19,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218542 states to 218542 states and 229623 transitions. [2022-07-13 13:14:19,455 INFO L78 Accepts]: Start accepts. Automaton has 218542 states and 229623 transitions. Word has length 569 [2022-07-13 13:14:19,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:14:19,455 INFO L495 AbstractCegarLoop]: Abstraction has 218542 states and 229623 transitions. [2022-07-13 13:14:19,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.2) internal successors, (286), 5 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:19,456 INFO L276 IsEmpty]: Start isEmpty. Operand 218542 states and 229623 transitions. [2022-07-13 13:14:19,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2022-07-13 13:14:19,471 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:14:19,472 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:14:19,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-13 13:14:19,472 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:14:19,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:14:19,472 INFO L85 PathProgramCache]: Analyzing trace with hash -927520867, now seen corresponding path program 1 times [2022-07-13 13:14:19,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:14:19,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707276455] [2022-07-13 13:14:19,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:14:19,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:14:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:14:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 779 proven. 0 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-07-13 13:14:19,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:14:19,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707276455] [2022-07-13 13:14:19,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707276455] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:14:19,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:14:19,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:14:19,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663744752] [2022-07-13 13:14:19,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:14:19,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:14:19,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:14:19,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:14:19,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:14:19,617 INFO L87 Difference]: Start difference. First operand 218542 states and 229623 transitions. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:14:22,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:14:22,645 INFO L93 Difference]: Finished difference Result 453684 states and 477155 transitions. [2022-07-13 13:14:22,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:14:22,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 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 586 [2022-07-13 13:14:22,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:14:22,984 INFO L225 Difference]: With dead ends: 453684 [2022-07-13 13:14:22,984 INFO L226 Difference]: Without dead ends: 235144 [2022-07-13 13:14:23,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:14:23,105 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 280 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:14:23,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 352 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1211 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 13:14:23,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235144 states.